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Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC 31 July 2012 | |
| Contact: ATLAS Higgs conveners | |
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| e-print arXiv:1207.7214 | pdf from arXiv |
| Inspire record | - |
| Figures Auxiliary Material | - |
| Abstract | |
| A search for the Standard Model Higgs boson in proton-proton collisions with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities of approximately 4.8 fb$^{-1}$ collected at $\sqrt{s}$ = 7 TeV in 2011 and 5.8 fb$^{-1}$ at $\sqrt{s}$ = 8 TeV in 2012. Individual searches in the channels $H \to ZZ^{(*)} \to llll, H \to \gamma \gamma$ and $H \to WW^{(*)} \to e\nu\mu\nu$ in the 8 TeV data are combined with previously published results of searches for $H \to ZZ^{(*)}, WW^{(*)}, b\bar{b}$ and $\tau^+ \tau^-$ in the 7 TeV data and results from improved analyses of the $H \to ZZ^{(*)} \to llll$ and $H \to \gamma\gamma$ channels in the 7 TeV data. Clear evidence for the production of a neutral boson with a measured mass of 126.0 $\pm$ 0.4(stat) $\pm$ 0.4(sys) GeV is presented. This observation, which has a significance of 5.9 standard deviations, corresponding to a background fluctuation probability of 1.7x10$^{-9}$, is compatible with the production and decay of the Standard Model Higgs boson. | |
| Figures | |
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Figure 001: Invariant mass distribution of the sub-leading lepton pair (m34) for a sample defined by the presence of a Z boson candidate and an additional same-flavour electron or muon pair, for the combination of root s = 7 TeV and root s = 8 TeV data in the entire phase-space of the analysis after the kinematic selections described in the text. Isolation and transverse impact parameter significance requirements are applied to the leading lepton pair only. The MC is normalised to the data-driven background estimations. The relativelly small contribution of a SM Higgs with mH = 125 GeV in this sample is also shown. png (85kB) eps (22kB) pdf (8kB) |
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Figure 002: The distribution of the four-lepton invariant mass, m4l, for the selected candidates, compared to the background expectation in the 80 to 250 GeV mass range, for the combination of the root s = 7 TeV and root s = 8 TeV data. The signal expectation for a SM Higgs with mH = 125 GeV is also shown. png (82kB) eps (24kB) pdf (8kB) |
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Figure 003: Distribution of the m34 versus the m12 invariant mass, before the application of the Z-mass constrained kinematic fit, for the selected candidates in the m4l range 120 to 130 GeV. The expected distributions for a SM Higgs with mH = 125 GeV (the sizes of the boxes indicate the relative density) and for the total background (the intensity of the shading indicates the relative density) are also shown. png (120kB) eps (56kB) pdf (11kB) |
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Figure 004: The distributions of the invariant mass of diphoton candidates after all selections for the combined 7 TeV and 8 TeV data sample. The inclusive sample is shown in a) and a weighted version of the same sample in c); the weights are explained in the publication. The result of a fit to the data of the sum of a signal component fixed to mH = 126.5GeV and a background component described by a fourth-order Bernstein polynomial is superimposed. The residuals of the data and weighted data with respect to the respective fitted background component are displayed in b) and d). png (162kB) eps (46kB) pdf (15kB) |
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Figure 005a: Validation and control distributions for the H to WW(*) to e nu mu nu analysis. a) Delta phi_ll distribution in the same-charge validation region after the ETmiss,rel and zero-jet requirements. b) mT distribution in the WW control region for the 0-jet channel. The e mu and mu e final states are combined. The hashed area indicates the total uncertainty on the background prediction. The expected signal for mH = 125GeV is negligible and therefore not visible. png (104kB) eps (30kB) pdf (11kB) |
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Figure 005b: Validation and control distributions for the H to WW(*) to e nu mu nu analysis. a) Delta phi_ll distribution in the same-charge validation region after the ETmiss,rel and zero-jet requirements. b) mT distribution in the WW control region for the 0-jet channel. The e mu and mu e final states are combined. The hashed area indicates the total uncertainty on the background prediction. The expected signal for mH = 125GeV is negligible and therefore not visible. png (94kB) eps (32kB) pdf (12kB) |
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Figure 006: Distribution of the transverse mass, mT, in the 0-jet and 1-jet analyses with both e mu and mu e channels combined, for events satisfying all selection criteria. The expected signal for mH = 125GeV is shown stacked on top of the background prediction. The W+jets background is estimated from data, and WW and top background MC predictions are normalised to the data using control regions. The hashed area indicates the total uncertainty on the background prediction. png (80kB) eps (26kB) pdf (9kB) |
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Figure 007: Combined search results: (a) The observed (solid) 95% CL upper limit on the signal strength as a function of mH and the expectation (dashed) under the background-only hypothesis. The dark and light shaded bands show the plus/minus one sigma and plus/minus two sigma uncertainties on the background-only expectation. (b) The observed (solid) local p0 as a function of mH and the expectation (dashed) for a SM Higgs boson signal hypothesis (mu = 1) at the given mass. (c) The best-fit signal strength muhat as a function of mH. The band indicates the approximate 68% CL interval around the fitted value. png (148kB) eps (50kB) pdf (17kB) |
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Figure 008: The observed local p0 as a function of the hypothesized Higgs boson mass for the (a) H to ZZ(*) to 4l, (b) H to gamma gamma and (c) H to WW(*) to l nu l nu channels. The dashed curves show the expected local p0 under the hypothesis of a SM Higgs boson signal at that mass. Results are shown separately for the root s = 7 TeV data (dark, blue), the root s = 8 TeV data (light, red), and their combination (black). png (182kB) eps (58kB) pdf (16kB) |
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Figure 009: The observed (solid) local p0 as a function of mH in the low mass range. The dashed curve shows the expected local p0 under the hypothesis of a SM Higgs boson signal at that mass with its plus/minus one sigma band. The horizontal dashed lines indicate the p-values corresponding to significances of 1 to 6 sigma. png (96kB) eps (27kB) pdf (10kB) |
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Figure 010: Measurements of the signal strength parameter mu for mH=126 GeV for the individual channels and their combination. png (65kB) eps (18kB) pdf (4kB) |
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Figure 011: Confidence intervals in the (mu, mH ) plane for the H to ZZ(*) to 4l, H to gamma gamma, and H to WW(*) to l nu l nu channels, including all systematic uncertainties. The markers indicate the maximum likelihood estimates (muhat, mHhat ) in the corresponding channels (the maximum likelihood estimates for H to ZZ(*) to 4l and H to WW(*) to l nu l nu coincide). png (94kB) eps (19kB) pdf (7kB) |
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Figure 012: Likelihood contours for the H to gamma gamma channel in the (mu_ggF+ttbarH, mu_VBF+VH) plane including the branching ratio factor B/B_SM. The quantity mu_ggF+ttbarH (mu_VBF+VH ) is a common scale factor for the ggF and ttbarH (VBF and VH) production cross sections. The best fit to the data (+) and 68% (full) and 95% (dashed) CL contours are also indicated, as well as the SM expectation (X). png (45kB) eps (14kB) pdf (6kB) |
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| Auxiliary figures and tables | |
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Figure
004a: Invariant mass distribution of diphoton candidates for the combined root s = 7TeV and root s = 8TeV data samples. The result of a fit to the data of the sum of a signal component fixed to mH = 126.5GeV and a background component described by a fourth-order Bernstein polynomial is superimposed. The bottom inset displays the residuals of the data with respect to the fitted background component. png (92kB) eps (26kB) pdf (11kB) |
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004b: The weighted distribution of invariant mass of diphoton candidates for the combined root s = 7TeV and root s = 8TeV data samples. The weight wi for category i from [1, 10] is defined to be ln (1 + Si/Bi), where Si is 90% of the expected signal for mH = 126.5 GeV, and Bi is the integral, in a window containing Si, of a background-only fit to the data. The values Si/Bi have only a mild dependence on mH. The result of a fit to the data of the sum of a signal component fixed to mH = 126.5GeV and a background component described by a fourth-order Bernstein polynomial is superimposed. The bottom inset displays the residuals of the data with respect to the fitted background component. png (87kB) eps (24kB) pdf (8kB) |
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007a: Combined search results: The observed (solid) 95% CL upper limit on the signal strength as a function of mH and the expectation (dashed) under the background-only hypothesis. The dark and light shaded bands show the plus/minus one sigma and plus/minus two sigma uncertainties on the background-only expectation. png (84kB) eps (22kB) pdf (9kB) |
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007b: Combined search results: The observed (solid) local p0 as a function of mH and the expectation (dashed) for a SM Higgs boson signal hypothesis (mu = 1) at the given mass. png (72kB) eps (21kB) pdf (7kB) |
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007c: Combined search results: The best-fit signal strength muhat as a function of mH. The band indicates the approximate 68% CL interval around the fitted value. png (64kB) eps (16kB) pdf (7kB) |
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008a: The observed local p0 as a function of the hypothesized Higgs boson mass for the H to ZZ(*) to 4l channel. The dashed curves show the expected local p0 under the hypothesis of a SM Higgs boson signal at that mass. Results are shown separately for the root s = 7 TeV data (dark, blue), the root s = 8 TeV data (light, red), and their combination (black). png (90kB) eps (18kB) pdf (7kB) |
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008b: The observed local p0 as a function of the hypothesized Higgs boson mass for the H to gamma gamma channel. The dashed curves show the expected local p0 under the hypothesis of a SM Higgs boson signal at that mass. Results are shown separately for the root s = 7 TeV data (dark, blue), the root s = 8 TeV data (light, red), and their combination (black). png (91kB) eps (24kB) pdf (8kB) |
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008c: The observed local p0 as a function of the hypothesized Higgs boson mass for the H to WW(*) to l nu l nu channel. The dashed curves show the expected local p0 under the hypothesis of a SM Higgs boson signal at that mass. Results are shown separately for the root s = 7 TeV data (dark, blue), the root s = 8 TeV data (light, red), and their combination (black). png (85kB) eps (23kB) pdf (7kB) |
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013: The best-fit signal strength mu-hat as a function of the Higgs boson mass hypothesis for the full combination of the 2011 and 2012 data. The interval around mu-hat corresponds to a variation of -2ln lambda(mu) lt 1 that, in the asymptotic limit, corresponds to the 68% confidence interval. png (68kB) eps (12kB) pdf (8kB) |
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014a: The value of the combined CL_s for mu=1 (testing the Standard Model Higgs boson hypothesis) as a function of mh in the full mass range of this analysis (a) and in the low mass range (b). The expected CL_s is shown in the dashed curves. The regions with CL_s lt alpha are excluded at least at (1-alpha) CL. The 95% and 99% CL values are indicated as dashed horizontal lines. png (82kB) eps (16kB) pdf (12kB) |
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014b: The value of the combined CL_s for mu=1 (testing the Standard Model Higgs boson hypothesis) as a function of mh in the full mass range of this analysis (a) and in the low mass range (b). The expected CL_s is shown in the dashed curves. The regions with CL_s lt alpha are excluded at least at (1-alpha) CL. The 95% and 99% CL values are indicated as dashed horizontal lines. png (79kB) eps (18kB) pdf (9kB) |
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015a: The same as Fig.9 shown in terms of local significance. An excess (deficit) of events corresponds to a positive (negative) local significance. This presentation makes clear the magnitude of a local deficit of events, since the logarithmic scale in Fig.9 compresses large values of p_0. The dashed curves show the median expected local p_0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate significances ranging from -2sigma to 6sigma. Energy scale systematics are not included; taking them into account leads to a small correction sim 0.1sigma near mh=126 GeV. png (70kB) eps (11kB) pdf (12kB) |
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015b: The same as Fig.9 shown in terms of local significance. An excess (deficit) of events corresponds to a positive (negative) local significance. This presentation makes clear the magnitude of a local deficit of events, since the logarithmic scale in Fig.9 compresses large values of p_0. The dashed curves show the median expected local p_0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate significances ranging from -2sigma to 6sigma. Energy scale systematics are not included; taking them into account leads to a small correction sim 0.1sigma near mh=126 GeV. png (63kB) eps (11kB) pdf (7kB) |
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016a: The observed (solid) and expected (dashed) 95% CL cross section upper limits for the individual search channels and the combination, normalised to the SM Higgs boson production cross section, as a function of the Higgs boson mass hypothesis; (a) for the full Higgs boson mass hypotheses range and (b) in the low mass range. The expected limits are those for the background-only hypothesis i.e. in the absence of a Higgs boson signal. png (160kB) eps (33kB) pdf (13kB) |
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016b: The observed (solid) and expected (dashed) 95% CL cross section upper limits for the individual search channels and the combination, normalised to the SM Higgs boson production cross section, as a function of the Higgs boson mass hypothesis; (a) for the full Higgs boson mass hypotheses range and (b) in the low mass range. The expected limits are those for the background-only hypothesis i.e. in the absence of a Higgs boson signal. png (114kB) eps (24kB) pdf (8kB) |
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017a: The local probability p_0 for a background-only experiment to be more signal-like than the observation, for individual channels and the combination; (a) in the full mass range of 110-600 GeV and (b) in the low mass range of 110-150 GeV. The full curves give the observed individual and combined p_0. The dashed curves show the median expected value under the hypothesis of a SM Higgs boson signal at that mass. The horizontal dashed lines indicate the p_0 corresponding to significances of 0sigma to 6sigma. png (163kB) eps (51kB) pdf (16kB) |
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017b: The local probability p_0 for a background-only experiment to be more signal-like than the observation, for individual channels and the combination; (a) in the full mass range of 110-600 GeV and (b) in the low mass range of 110-150 GeV. The full curves give the observed individual and combined p_0. The dashed curves show the median expected value under the hypothesis of a SM Higgs boson signal at that mass. The horizontal dashed lines indicate the p_0 corresponding to significances of 0sigma to 6sigma. png (135kB) eps (43kB) pdf (9kB) |
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018a: The local significance in terms of standard deviations for individual channels and the combination; (a) in the full mass range of 110-600 GeV and (b) in the low mass range of 110-150 GeV. The full curves give the observed individual and combined local significances. The dashed curves show the median expected value under the hypothesis of a SM Higgs boson signal at that mass. png (156kB) eps (33kB) pdf (13kB) |
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018b: The local significance in terms of standard deviations for individual channels and the combination; (a) in the full mass range of 110-600 GeV and (b) in the low mass range of 110-150 GeV. The full curves give the observed individual and combined local significances. The dashed curves show the median expected value under the hypothesis of a SM Higgs boson signal at that mass. png (113kB) eps (22kB) pdf (8kB) |
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019a: The expected 95% CL cross section upper limits for the individual search channels and the combination, normalised to the SM Higgs boson production cross section, as a function of the Higgs boson mass hypothesis; (a) for the full Higgs boson mass hypotheses range and (b) in the low mass range. The expected limits are those for the background-only hypothesis i.e. in the absence of a Higgs boson signal. png (96kB) eps (20kB) pdf (8kB) |
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019b: The expected 95% CL cross section upper limits for the individual search channels and the combination, normalised to the SM Higgs boson production cross section, as a function of the Higgs boson mass hypothesis; (a) for the full Higgs boson mass hypotheses range and (b) in the low mass range. The expected limits are those for the background-only hypothesis i.e. in the absence of a Higgs boson signal. png (78kB) eps (18kB) pdf (6kB) |
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020a: The expected local probability p_0 as a function of the hypothetical Higgs boson mass, in the presence of a SM Higgs boson signal at that mass. The local p_0 is the probability for background-only experiments to be more signal-like than the observation. Results are shown both for individual channels and the combination; (a) in the full mass range of 110-600 GeV and (b) in the low mass range of 110-150 GeV. The horizontal dashed lines indicate the p_0 corresponding to significances of 0sigma to 6sigma. png (115kB) eps (40kB) pdf (10kB) |
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020b: The expected local probability p_0 as a function of the hypothetical Higgs boson mass, in the presence of a SM Higgs boson signal at that mass. The local p_0 is the probability for background-only experiments to be more signal-like than the observation. Results are shown both for individual channels and the combination; (a) in the full mass range of 110-600 GeV and (b) in the low mass range of 110-150 GeV. The horizontal dashed lines indicate the p_0 corresponding to significances of 0sigma to 6sigma. png (99kB) eps (37kB) pdf (8kB) |
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021a: The expected local significance in terms of standard deviations versus Higgs boson mass hypothesis, in the presence of a SM Higgs boson signal. Results are shown for individual channels and the combination in the full mass range (a) range of 110-600 GeV and in the low mass range of 110-150 GeV (b). png (85kB) eps (20kB) pdf (8kB) |
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021b: The expected local significance in terms of standard deviations versus Higgs boson mass hypothesis, in the presence of a SM Higgs boson signal. Results are shown for individual channels and the combination in the full mass range (a) range of 110-600 GeV and in the low mass range of 110-150 GeV (b). png (70kB) eps (17kB) pdf (6kB) |
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022: The observed (full line) and expected (dashed line) 95% CL combined upper limits on the SM Higgs boson production cross section divided by the Standard Model expectation as a function of mh for the H to gg, H to ZZ(*) to 4l and H to WW to lnln analyses on 2012 data. The dashed curve shows the median expected limit in the absence of a signal and the green and yellow bands indicate the corresponding 68% and 95% intervals. png (66kB) eps (14kB) pdf (8kB) |
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023: The value of the combined CL_s for mu=1 (testing the Standard Model Higgs boson hypothesis) as a function of mh for the H to gg, H to ZZ(*) to 4l and H to WW to lnln analyses on 2012 data. The regions with CL_s lt alpha are excluded at least at (1-alpha) CL. The 95% and 99% CL values are indicated as dashed lines. png (75kB) eps (19kB) pdf (9kB) |
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024: The local probability p_0 for a background-only experiment to be more signal-like than the observation as a function of mh for the H to gg, H to ZZ(*) to 4l, and H to WW to lnln analyses on 2012 data. The dashed curves show the median expected local p_0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 0 to 6sigma. png (82kB) eps (26kB) pdf (9kB) |
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025: The same as Fig.24 shown in terms of local significance. An excess (deficit) of events corresponds to a positive (negative) local significance. This presentation makes clear the magnitude of a local deficit of events, since the logarithmic scale in Fig.24 compresses large values of p_0. The dashed curves show the median expected local p_0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate significances ranging from 0 sigma to 6 sigma. Energy scale systematic uncertainties are not included. png (61kB) eps (11kB) pdf (7kB) |
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026a: (a) The local probability p_0 for a background-only experiment to be more signal-like than the observation and (b) the 95% CL upper limit on the SM Higgs boson production cross section divided by the SM expectation as a function of mh is indicated by the solid curves for the combination of the high mass resolution H to gg and H to ZZ(*) to 4l channels (red), the low mass resolution channels H to WW to lnln, H to tau tau and H to bb channels (blue), and all channels (black). The dashed curves show (a) the median expected p_0 value under the hypothesis of a SM Higgs boson signal at that mass and (b) the median expected limit in the absence of a signal. The green and yellow bands indicate the corresponding 68% and 95% intervals for the full combination. png (112kB) eps (32kB) pdf (17kB) |
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026b: (a) The local probability p_0 for a background-only experiment to be more signal-like than the observation and (b) the 95% CL upper limit on the SM Higgs boson production cross section divided by the SM expectation as a function of mh is indicated by the solid curves for the combination of the high mass resolution H to gg and H to ZZ(*) to 4l channels (red), the low mass resolution channels H to WW to lnln, H to tau tau and H to bb channels (blue), and all channels (black). The dashed curves show (a) the median expected p_0 value under the hypothesis of a SM Higgs boson signal at that mass and (b) the median expected limit in the absence of a signal. The green and yellow bands indicate the corresponding 68% and 95% intervals for the full combination. png (98kB) eps (19kB) pdf (15kB) |
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027: Distribution of m12 for the H to ZZ(*) to 4l channel for √s=7TeV, in the control region where the isolation requirements are not applied to the two sub-leading muons, and at least one of these muons fails the impact parameter significance requirement. The fit used to obtain the yields for ttbar and Z+jets is presented, the MC expectations are also shown for comparison. png (57kB) eps (18kB) pdf (7kB) |
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028: Distribution of m12 for the H to ZZ(*) to 4l channel, for √s=8TeV, in the control region where the isolation requirements are not applied to the two sub-leading muons, and at least one of these muons fails the impact parameter significance requirement. The fit used to obtain the yields for ttbar and Z+jets is presented, the MC expectations are also shown for comparison. png (68kB) eps (19kB) pdf (7kB) |
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029: Shape comparison of the m4l distribution used for the Z+jets and tbart contributions to the H to ZZ(*) to 4l channel, in a control region where the sub-leading dilepton fails either the isolation or the impact parameter significance requirements of the analysis, for both the √s=7TeV and √s=8TeV data samples. png (52kB) eps (14kB) pdf (6kB) |
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030: Best fit values for mu and mH, and likelihood ratio contours that, in the asymptotic limit, correspond to 68% and 95% level contours in the (mu,mH) plane, for the H to ZZ(*) to 4l channel. The light lines indicate the effect of holding constant at their best-fit values the nuisance parameters which describe the energy scale systematic (ESS) uncertainties in the likelihood function. png (87kB) eps (13kB) pdf (6kB) |
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031a: Invariant mass distributions for simulated (a) H to ZZ(*) to 4mu, (b) H to ZZ(*) to 2e2mu and (c) H to ZZ(*) to 4e events for mH=130GeV, at √s=8TeV. The fitted range for the Gaussian is chosen to be: -2sigma to 2sigma (-1.5sigma to 2.5sigma) for the 4mu (2e2mu/4e) channel. The slightly reduced mean values arise from radiative losses which are more explicit in channels involving electrons. In (d), (e) and (f) the corresponding results after applying the Z mass constraint are shown. png (76kB) eps (15kB) pdf (10kB) |
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031b: Invariant mass distributions for simulated (a) H to ZZ(*) to 4mu, (b) H to ZZ(*) to 2e2mu and (c) H to ZZ(*) to 4e events for mH=130GeV, at √s=8TeV. The fitted range for the Gaussian is chosen to be: -2sigma to 2sigma (-1.5sigma to 2.5sigma) for the 4mu (2e2mu/4e) channel. The slightly reduced mean values arise from radiative losses which are more explicit in channels involving electrons. In (d), (e) and (f) the corresponding results after applying the Z mass constraint are shown. png (85kB) eps (17kB) pdf (11kB) |
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031c: Invariant mass distributions for simulated (a) H to ZZ(*) to 4mu, (b) H to ZZ(*) to 2e2mu and (c) H to ZZ(*) to 4e events for mH=130GeV, at √s=8TeV. The fitted range for the Gaussian is chosen to be: -2sigma to 2sigma (-1.5sigma to 2.5sigma) for the 4mu (2e2mu/4e) channel. The slightly reduced mean values arise from radiative losses which are more explicit in channels involving electrons. In (d), (e) and (f) the corresponding results after applying the Z mass constraint are shown. png (85kB) eps (17kB) pdf (10kB) |
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031d: Invariant mass distributions for simulated (a) H to ZZ(*) to 4mu, (b) H to ZZ(*) to 2e2mu and (c) H to ZZ(*) to 4e events for mH=130GeV, at √s=8TeV. The fitted range for the Gaussian is chosen to be: -2sigma to 2sigma (-1.5sigma to 2.5sigma) for the 4mu (2e2mu/4e) channel. The slightly reduced mean values arise from radiative losses which are more explicit in channels involving electrons. In (d), (e) and (f) the corresponding results after applying the Z mass constraint are shown. png (76kB) eps (15kB) pdf (10kB) |
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031e: Invariant mass distributions for simulated (a) H to ZZ(*) to 4mu, (b) H to ZZ(*) to 2e2mu and (c) H to ZZ(*) to 4e events for mH=130GeV, at √s=8TeV. The fitted range for the Gaussian is chosen to be: -2sigma to 2sigma (-1.5sigma to 2.5sigma) for the 4mu (2e2mu/4e) channel. The slightly reduced mean values arise from radiative losses which are more explicit in channels involving electrons. In (d), (e) and (f) the corresponding results after applying the Z mass constraint are shown. png (77kB) eps (15kB) pdf (10kB) |
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031f: Invariant mass distributions for simulated (a) H to ZZ(*) to 4mu, (b) H to ZZ(*) to 2e2mu and (c) H to ZZ(*) to 4e events for mH=130GeV, at √s=8TeV. The fitted range for the Gaussian is chosen to be: -2sigma to 2sigma (-1.5sigma to 2.5sigma) for the 4mu (2e2mu/4e) channel. The slightly reduced mean values arise from radiative losses which are more explicit in channels involving electrons. In (d), (e) and (f) the corresponding results after applying the Z mass constraint are shown. png (86kB) eps (17kB) pdf (10kB) |
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032a: The results of a simultaneous fit to (a) the number of b-layer hits and (b) the ratio of high threshold hits in the Transition Radiation Tracker (R_TRT) for the background components in the H to ZZ(*) to 2mu 2e channel. In (c) and (d) the corresponding results for the H to ZZ(*) to 4e channel are given. The sources of background electrons are denoted as: light jets faking an electron (f), photon conversions (gamma) and electrons from heavy quark semi-leptonic decays (Q). png (53kB) eps (12kB) pdf (5kB) |
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032b: The results of a simultaneous fit to (a) the number of b-layer hits and (b) the ratio of high threshold hits in the Transition Radiation Tracker (R_TRT) for the background components in the H to ZZ(*) to 2mu 2e channel. In (c) and (d) the corresponding results for the H to ZZ(*) to 4e channel are given. The sources of background electrons are denoted as: light jets faking an electron (f), photon conversions (gamma) and electrons from heavy quark semi-leptonic decays (Q). png (64kB) eps (16kB) pdf (8kB) |
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032c: The results of a simultaneous fit to (a) the number of b-layer hits and (b) the ratio of high threshold hits in the Transition Radiation Tracker (R_TRT) for the background components in the H to ZZ(*) to 2mu 2e channel. In (c) and (d) the corresponding results for the H to ZZ(*) to 4e channel are given. The sources of background electrons are denoted as: light jets faking an electron (f), photon conversions (gamma) and electrons from heavy quark semi-leptonic decays (Q). png (51kB) eps (12kB) pdf (5kB) |
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032d: The results of a simultaneous fit to (a) the number of b-layer hits and (b) the ratio of high threshold hits in the Transition Radiation Tracker (R_TRT) for the background components in the H to ZZ(*) to 2mu 2e channel. In (c) and (d) the corresponding results for the H to ZZ(*) to 4e channel are given. The sources of background electrons are denoted as: light jets faking an electron (f), photon conversions (gamma) and electrons from heavy quark semi-leptonic decays (Q). png (64kB) eps (16kB) pdf (8kB) |
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Figure
033a: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=8TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (69kB) eps (23kB) pdf (7kB) |
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Figure
033b: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=8TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (63kB) eps (20kB) pdf (7kB) |
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Figure
033c: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=8TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (79kB) eps (27kB) pdf (8kB) |
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Figure
033d: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=8TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (75kB) eps (23kB) pdf (8kB) |
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Figure
034a: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=7 TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (69kB) eps (23kB) pdf (7kB) |
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Figure
034b: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=7 TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (62kB) eps (20kB) pdf (7kB) |
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Figure
034c: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=7 TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (74kB) eps (24kB) pdf (8kB) |
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Figure
034d: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair for the √s=7 TeV data, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll(mu^+mu^-/e^+e^-)+mu^+mu^- events. In (b) the m12 and in (d) the m34 distributions are presented for ll(mu^+mu^-/e^+e^)+e^+e^- events. The kinematic selections of the analysis are applied. Isolation requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (67kB) eps (21kB) pdf (7kB) |
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Figure
035a: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair, for the √s=8TeV and √s=7TeV datasets combined, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll+mumu events. In (b) the m12 and in (d) the m34 distributions are presented for ll+ee events. The kinematic selection of the analysis is applied. Isolation and impact parameter significance requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (69kB) eps (23kB) pdf (7kB) |
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Figure
035b: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair, for the √s=8TeV and √s=7TeV datasets combined, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll+mumu events. In (b) the m12 and in (d) the m34 distributions are presented for ll+ee events. The kinematic selection of the analysis is applied. Isolation and impact parameter significance requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (64kB) eps (19kB) pdf (7kB) |
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Figure
035c: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair, for the √s=8TeV and √s=7TeV datasets combined, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll+mumu events. In (b) the m12 and in (d) the m34 distributions are presented for ll+ee events. The kinematic selection of the analysis is applied. Isolation and impact parameter significance requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (82kB) eps (27kB) pdf (9kB) |
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Figure
035d: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair, for the √s=8TeV and √s=7TeV datasets combined, in the H to ZZ(*) to 4l channel. The sample is divided according to the flavour of the additional lepton pair. In (a) the m12 and in (c) the m34 distributions are presented for ll+mumu events. In (b) the m12 and in (d) the m34 distributions are presented for ll+ee events. The kinematic selection of the analysis is applied. Isolation and impact parameter significance requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (77kB) eps (23kB) pdf (8kB) |
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Figure
036a: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair, for the √s=8TeV and √s=7TeV datasets. In (a) the m12 and in (b) the m34 distributions are presented for 4l events.The kinematic selection of the analysis is applied. Isolation and impact parameter significance requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (74kB) eps (19kB) pdf (7kB) |
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Figure
036b: Invariant mass distributions of the lepton pairs in a sample defined by a Z boson candidate and an additional same-flavour lepton pair, for the √s=8TeV and √s=7TeV datasets. In (a) the m12 and in (b) the m34 distributions are presented for 4l events.The kinematic selection of the analysis is applied. Isolation and impact parameter significance requirements are applied to the first lepton pair only. The MC is normalised to the data driven background estimations. png (85kB) eps (21kB) pdf (8kB) |
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Figure
037a: Invariant mass of the four leptons, combining all final states, demonstrating the single-resonant peak pp to Z to 4l. To improve the acceptance the following modifications were perfoed to the nominal analysis: the requirement on m12 is relaxed to 30GeV lt m12 lt 106GeV, the requirement on m34 is relaxed to 5GeV lt m34 lt 115GeV, and the pt requirement on the softest muon was relaxed to pt gt 4GeV. For 4mu events, the requirement on the third muon is pt gt 8GeV. The data are shown for (a) √s=8TeV, (b) √s=7TeV and (c) combined. png (41kB) eps (13kB) pdf (5kB) |
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Figure
037b: Invariant mass of the four leptons, combining all final states, demonstrating the single-resonant peak pp to Z to 4l. To improve the acceptance the following modifications were perfoed to the nominal analysis: the requirement on m12 is relaxed to 30GeV lt m12 lt 106GeV, the requirement on m34 is relaxed to 5GeV lt m34 lt 115GeV, and the pt requirement on the softest muon was relaxed to pt gt 4GeV. For 4mu events, the requirement on the third muon is pt gt 8GeV. The data are shown for (a) √s=8TeV, (b) √s=7TeV and (c) combined. png (42kB) eps (14kB) pdf (5kB) |
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Figure
037c: Invariant mass of the four leptons, combining all final states, demonstrating the single-resonant peak pprightarrow Z to 4l. To improve the acceptance the following modifications were perfoed to the nominal analysis: the requirement on m12 is relaxed to 30GeV lt m12 lt 106GeV, the requirement on m34 is relaxed to 5GeV lt m34 lt 115GeV, and the pt requirement on the softest muon was relaxed to pt gt 4GeV. For 4mu events, the requirement on the third muon is pt gt 8GeV. The data are shown for (a) √s=8TeV, (b) √s=7TeV and (c) combined. png (50kB) eps (16kB) pdf (6kB) |
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Figure
038a: Ratio of the isolation and impact parameter efficiencies between data and simulation, estimated with the Tag aqnd Probe method, using Z to mumu (a) and (b) Z to ee events. png (86kB) eps (13kB) pdf (6kB) |
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Figure
038b: Ratio of the isolation and impact parameter efficiencies between data and simulation, estimated with the Tag aqnd Probe method, using Z to mumu (a) and (b) Z to ee events. png (102kB) eps (14kB) pdf (6kB) |
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Figure
039a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation in the 80-250GeV mass range for the (a) √s=8TeV and (b) √s=7TeV datasets. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (90kB) eps (25kB) pdf (8kB) |
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Figure
039b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation in the 80-250GeV mass range for the (a) √s=8TeV and (b) √s=7TeV datasets. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (84kB) eps (24kB) pdf (8kB) |
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Figure
040a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=8TeV analysis, for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (82kB) eps (25kB) pdf (7kB) |
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Figure
040b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=8TeV analysis, for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (90kB) eps (26kB) pdf (8kB) |
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Figure
040c: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=8TeV analysis, for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (77kB) eps (24kB) pdf (7kB) |
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Figure
040d: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=8TeV analysis, for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (86kB) eps (25kB) pdf (8kB) |
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Figure
041a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=7TeV analysis for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (74kB) eps (22kB) pdf (7kB) |
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Figure
041b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=7TeV analysis for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (75kB) eps (22kB) pdf (6kB) |
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Figure
041c: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=7TeV analysis for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (69kB) eps (21kB) pdf (6kB) |
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Figure
041d: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the √s=7TeV analysis for the various sub-channels (a) 4mu , (b) 2mu2e, (c) 2e2mu, (d) 4e, compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (75kB) eps (23kB) pdf (7kB) |
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Figure
042a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets for the various sub-channels, (a),4mu (b),2mu2e (c),2e2mu (d),4e compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (82kB) eps (25kB) pdf (8kB) |
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Figure
042b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets for the various sub-channels, (a),4mu (b),2mu2e (c),2e2mu (d),4e compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (86kB) eps (26kB) pdf (8kB) |
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Figure
042c: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets for the various sub-channels, (a),4mu (b),2mu2e (c),2e2mu (d),4e compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (79kB) eps (24kB) pdf (7kB) |
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Figure
042d: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets for the various sub-channels, (a),4mu (b),2mu2e (c),2e2mu (d),4e compared to the background expectation for the 80-250GeV mass range. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (85kB) eps (25kB) pdf (8kB) |
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Figure
043a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation for the 80-250GeV mass range for the (a) √s=8TeV, (b) √s=7TeV and (c) combined datasets. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. Figures (a) and (b) are the same as 39(a) and 39(b) with a different maximum in y-axis. png (87kB) eps (25kB) pdf (8kB) |
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Figure
043b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation for the 80-250GeV mass range for the (a) √s=8TeV, (b) √s=7TeV and (c) combined datasets. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. Figures (a) and (b) are the same as 39(a) and 39(b) with a different maximum in y-axis. png (81kB) eps (25kB) pdf (8kB) |
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Figure
043c: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation for the 80-250GeV mass range for the (a) √s=8TeV, (b) √s=7TeV and (c) combined datasets. Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. Figures (a) and (b) are the same as 39(a) and 39(b) with a different maximum in y-axis. png (95kB) eps (26kB) pdf (9kB) |
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Figure
044a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets, compared to the background expectation. The √s=8TeV and √s=7TeV datasets are shown separately in (a) and (b), respectively, and combined in (c). The combined result in the range 80-600GeV is also shown (d). Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (88kB) eps (31kB) pdf (9kB) |
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Figure
044b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets, compared to the background expectation. The √s=8TeV and √s=7TeV datasets are shown separately in (a) and (b), respectively, and combined in (c). The combined result in the range 80-600GeV is also shown (d). Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (81kB) eps (28kB) pdf (8kB) |
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Figure
044c: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets, compared to the background expectation. The √s=8TeV and √s=7TeV datasets are shown separately in (a) and (b), respectively, and combined in (c). The combined result in the range 80-600GeV is also shown (d). Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (95kB) eps (32kB) pdf (10kB) |
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Figure
044d: The distribution of the four-lepton invariant mass, m4l, for the selected candidates for the combination of both datasets, compared to the background expectation. The √s=8TeV and √s=7TeV datasets are shown separately in (a) and (b), respectively, and combined in (c). The combined result in the range 80-600GeV is also shown (d). Error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. png (98kB) eps (30kB) pdf (10kB) |
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Figure
045a: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation in the range 80-600GeV for the (a) √s=8TeV and (b) √s=7TeV datasets. The error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. The resolution of the reconstructed Higgs boson mass is dominated by detector resolution at low mH values and by the Higgs boson width at high mH. png (99kB) eps (31kB) pdf (10kB) |
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Figure
045b: The distribution of the four-lepton invariant mass, m4l, for the selected candidates compared to the background expectation in the range 80-600GeV for the (a) √s=8TeV and (b) √s=7TeV datasets. The error bars represent 68.3% central confidence intervals. The signal expectation for several mH hypotheses is also shown. The resolution of the reconstructed Higgs boson mass is dominated by detector resolution at low mH values and by the Higgs boson width at high mH. png (91kB) eps (29kB) pdf (9kB) |
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Figure
046a: Distribution of the m34 versus the m12 invariant mass, before the application of Z-mass constrained kinematic fit, for the selected candidates in the range 120-130GeV for the combination of both datasets. The expected shapes from MC for (a) signal with mH=125GeV and (b) ZZ(*), Z+jets and ttbar backgrounds are also overlayed. png (66kB) eps (29kB) pdf (8kB) |
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Figure
046b: Distribution of the m34 versus the m12 invariant mass, before the application of Z-mass constrained kinematic fit, for the selected candidates in the range 120-130GeV for the combination of both datasets. The expected shapes from MC for (a) signal with mH=125GeV and (b) ZZ(*), Z+jets and ttbar backgrounds are also overlayed. png (67kB) eps (28kB) pdf (8kB) |
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Figure
047a: The expected (dashed) and observed (full line) 95% CL upper limits on the Standard Model Higgs boson production cross section as a function of mH, divided by the expected SM Higgs boson cross section, for the √s=8TeV data sample. The dark (green) and light (yellow) bands indicate the expected limits with +- 1sigma and +- 2sigma fluctuations, respectively; (a) shows the low mass range, and (b) the full range under consideration. png (80kB) eps (21kB) pdf (7kB) |
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Figure
047b: The expected (dashed) and observed (full line) 95% CL upper limits on the Standard Model Higgs boson production cross section as a function of mH, divided by the expected SM Higgs boson cross section, for the √s=8TeV data sample. The dark (green) and light (yellow) bands indicate the expected limits with +- 1sigma and +- 2sigma fluctuations, respectively; (a) shows the low mass range, and (b) the full range under consideration. png (85kB) eps (28kB) pdf (9kB) |
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Figure
048a: The expected (dashed) and observed (full line) 95% CL upper limits on the SM Higgs boson production cross section as a function of mH, divided by the expected SM Higgs boson cross section for the √s=7TeV data sample. The dark (green) and light (yellow) bands indicate the expected limits with +- 1sigma and +- 2sigma fluctuations, respectively; (a) shows the low mass range, and (b) the full range under consideration. png (81kB) eps (24kB) pdf (9kB) |
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Figure
048b: The expected (dashed) and observed (full line) 95% CL upper limits on the SM Higgs boson production cross section as a function of mH, divided by the expected SM Higgs boson cross section for the √s=7TeV data sample. The dark (green) and light (yellow) bands indicate the expected limits with +- 1sigma and +- 2sigma fluctuations, respectively; (a) shows the low mass range, and (b) the full range under consideration. png (87kB) eps (30kB) pdf (11kB) |
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Figure
049a: The expected (dashed) and observed (full line) 95% CL upper limits on the Standard Model Higgs boson production cross section as a function of mH, divided by the expected SM Higgs boson cross section, for the combination of the √s=7TeV and √s=8TeV data samples. The dark (green) and light (yellow) bands indicate the expected limits with pm 1sigma and pm 2sigma fluctuations, respectively; (a) shows the low mass range, and (b) the full range under consideration. png (85kB) eps (21kB) pdf (8kB) |
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Figure
049b: The expected (dashed) and observed (full line) 95% CL upper limits on the Standard Model Higgs boson production cross section as a function of mH, divided by the expected SM Higgs boson cross section, for the combination of the √s=7TeV and √s=8TeV data samples. The dark (green) and light (yellow) bands indicate the expected limits with pm 1sigma and pm 2sigma fluctuations, respectively; (a) shows the low mass range, and (b) the full range under consideration. png (90kB) eps (29kB) pdf (9kB) |
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Figure
050a: The observed local pval for the combination of the 2011 and 2012 datasets (solid line). The dashed curve shows the expected median local pval for the signal hypothesis when tested at the corresponding m_H. The horizontal dashed lines indicate the pval values corresponding to local significances of 1sigma, 2sigma, 3sigma and 4sigma. (a) shows the low mass range, and (b) the full range under consideration. png (55kB) eps (14kB) pdf (5kB) |
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Figure
050b: The observed local pval for the combination of the 2011 and 2012 datasets (solid line). The dashed curve shows the expected median local pval for the signal hypothesis when tested at the corresponding m_H. The horizontal dashed lines indicate the pval values corresponding to local significances of 1sigma, 2sigma, 3sigma and 4sigma. (a) shows the low mass range, and (b) the full range under consideration. png (58kB) eps (14kB) pdf (6kB) |
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Figure
051a: The observed local pval for the combination of the 2011 and 2012 datasets (solid black line); the √s=7TeV and √s=8TeV data results are shown in solid lines (blue and red, respectively). The dashed curves show the expected median local pval for the signal hypothesis when tested at the corresponding m_H. The horizontal dashed lines indicate the pval values corresponding to local significances of 1sigma, 2sigma, 3sigma and 4sigma. (a) shows the low mass range, and (b) the full range under consideration. png (120kB) eps (19kB) pdf (8kB) |
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Figure
051b: The observed local pval for the combination of the 2011 and 2012 datasets (solid black line); the √s=7TeV and √s=8TeV data results are shown in solid lines (blue and red, respectively). The dashed curves show the expected median local pval for the signal hypothesis when tested at the corresponding m_H. The horizontal dashed lines indicate the pval values corresponding to local significances of 1sigma, 2sigma, 3sigma and 4sigma. (a) shows the low mass range, and (b) the full range under consideration. png (137kB) eps (20kB) pdf (9kB) |
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Figure
052a: Observed local pval, the probability that the background fluctuates to the observed number of events or higher, for each analysis sub-channel, and for their combination. Dashed curves show the expected median local pval for the signal hypothesis when tested at m_H; (a) 2012 (√s=8TeV) data, (b) 2011 (√s=7TeV) data. png (168kB) eps (21kB) pdf (9kB) |
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Figure
052b: Observed local pval, the probability that the background fluctuates to the observed number of events or higher, for each analysis sub-channel, and for their combination. Dashed curves show the expected median local pval for the signal hypothesis when tested at m_H; (a) 2012 (√s=8TeV) data, (b) 2011 (√s=7TeV) data. png (152kB) eps (26kB) pdf (12kB) |
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Figure
053a: Observed local pval, the probability that the background fluctuates to the observed number of events or higher, separating the two analyses with sub-leading muons (llmumu) from the two analyses with sub-leading electrons (llee); the black line shows the combined result. Dashed curves show the expected median local pval for the signal hypothesis when tested at m_H; (a) low mass region, (b) full mass range. png (119kB) eps (20kB) pdf (9kB) |
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053b: Observed local pval, the probability that the background fluctuates to the observed number of events or higher, separating the two analyses with sub-leading muons (llmumu) from the two analyses with sub-leading electrons (llee); the black line shows the combined result. Dashed curves show the expected median local pval for the signal hypothesis when tested at m_H; (a) low mass region, (b) full mass range. png (141kB) eps (21kB) pdf (10kB) |
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054a: Observed local pval, the probability that the background fluctuates to the observed number of events or higher, before and after the application of a Z mass constraint. Dashed curves show the expected median local pval for the signal hypothesis when tested at m_H; (a) low mass region, (b) full mass range. png (106kB) eps (17kB) pdf (7kB) |
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054b: Observed local pval, the probability that the background fluctuates to the observed number of events or higher, before and after the application of a Z mass constraint. Dashed curves show the expected median local pval for the signal hypothesis when tested at m_H; (a) low mass region, (b) full mass range. png (116kB) eps (17kB) pdf (7kB) |
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055a: The observed local pval, the probability that the background fluctuates to the observed number of events or higher, is shown as solid lines. The dashed curve shows the expected median local pval for the signal hypothesis when tested at m_H. (a) compares the local pval for the √s=8TeV and the √s=7TeV data samples; (b) shows the effect of allowing the irreducible background normalisation to float freely in the fit, for the √s=8TeV data sample. The horizontal dashed lines indicate the pval values corresponding to local significances of 1sigma, 2sigma, 3sigma and 4sigma. png (104kB) eps (17kB) pdf (7kB) |
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055b: The observed local pval, the probability that the background fluctuates to the observed number of events or higher, is shown as solid lines. The dashed curve shows the expected median local pval for the signal hypothesis when tested at m_H. (a) compares the local pval for the √s=8TeV and the √s=7TeV data samples; (b) shows the effect of allowing the irreducible background normalisation to float freely in the fit, for the √s=8TeV data sample. The horizontal dashed lines indicate the pval values corresponding to local significances of 1sigma, 2sigma, 3sigma and 4sigma. png (96kB) eps (16kB) pdf (7kB) |
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Figure
056a: The signal strength parameter mu=sigma/sigma_SM obtained from a fit to the data is presented (a) for the combined fit to the 2011 and 2012 data samples and (b) for the expected value of mu as a function of m_H when a SM Higgs boson signal with mH=125GeV is injected. png (79kB) eps (18kB) pdf (13kB) |
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056b: The signal strength parameter mu=sigma/sigma_SM obtained from a fit to the data is presented (a) for the combined fit to the 2011 and 2012 data samples and (b) for the expected value of mu as a function of m_H when a SM Higgs boson signal with mH=125GeV is injected. png (66kB) eps (17kB) pdf (13kB) |
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057a: Distribution of the expected diphoton mass (a) for H to gamma gamma signal events as a function of the algorithm used to determine the longitudinal vertex position of the hard-scattering event. The use of the calorimeter information, labelled as "Calo pointing" is fully adequate to reach the optimal achievable mass resolution labelled as "True vertex". The likelihood described in the publication, combining this information with the primary vertex information from the tracking, provides similar mass resolution. The dependence of the efficiency for selecting a reconstructed primary vertex (b) within Delta z= 0.2 mm of the true hard interaction vertex using two different methods: the highest Sum pT^2 of all tracks assigned to a vertex (black) and from the likelihood as described in the text (blue). The addition of the tracking information from the inner detector is necessary to improve the efficiency of identification of the hard-interaction primary vertex needed for the jet selection. png (103kB) eps (38kB) pdf (19kB) |
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057b: Distribution of the expected diphoton mass (a) for H to gamma gamma signal events as a function of the algorithm used to determine the longitudinal vertex position of the hard-scattering event. The use of the calorimeter information, labelled as "Calo pointing" is fully adequate to reach the optimal achievable mass resolution labelled as "True vertex". The likelihood described in the publication, combining this information with the primary vertex information from the tracking, provides similar mass resolution. The dependence of the efficiency for selecting a reconstructed primary vertex (b) within Delta z= 0.2 mm of the true hard interaction vertex using two different methods: the highest Sum pT^2 of all tracks assigned to a vertex (black) and from the likelihood as described in the text (blue). The addition of the tracking information from the inner detector is necessary to improve the efficiency of identification of the hard-interaction primary vertex needed for the jet selection. png (60kB) eps (12kB) pdf (8kB) |
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058: Stability of the invariant mass resolution with pile-up. The likelihood method is used to obtain the primary vertex. The variable mu is the average number of interactions per bunch crossing. png (102kB) eps (63kB) pdf (29kB) |
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Figure
059: Pile-up impact on calorimeter pointing. This figure shows a comparison between the two estimates of the primary vertex zpositions using diphoton events where both photons are unconverted in the barrel region of the electromagnetic calorimeter (abs(eta)less than 1.37). The z position is computed using the calorimeter pointing (energy weighted position of the EM shower in the first and second longitudinal layers of the calorimeter). The data sample is divided into 2 periods with different data taking conditions: the early 2011 data with Beta* = 1.5m (avg mu = 6.3) corresponding to an integrated luminosity of 2.1 fb-1 and late 2011 data with Beta* = 1.0m (avg mu = 11.6) corresponding to an integrated luminosity of 2.8 fb-1. The resolution observed in data is not sensitive to the different pile-up conditions of the 2 periods. It is in good agreement with the prediction from the Monte Carlo simulation (diphoton MC events). png (46kB) eps (14kB) pdf (8kB) |
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060a: Diphoton sample composition as a function of the invariant mass for the root s = 7TeV (a) and the root s= 8TeV (b) dataset. The small contribution from Drell-Yan events is included in the diphoton component. png (88kB) eps (45kB) pdf (16kB) |
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060b: Diphoton sample composition as a function of the invariant mass for the root s = 7TeV (a) and the root s= 8TeV (b) dataset. The small contribution from Drell-Yan events is included in the diphoton component. png (83kB) eps (43kB) pdf (16kB) |
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061: Invariant mass distribution after applying the diphoton selection: Data (black) and estimated contribution of Z to e+e-events to the diphoton invariant mass distribution (green) for the root s= 8TeV sample. This background contribution is obtained from reconstructed Z to e+e- events in data. png (66kB) eps (15kB) pdf (15kB) |
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062: Distribution of pTt in simulated events with Higgs boson production and in background events. The signal distribution is shown separately for gluon fusion (blue), and vector-boson fusion together with associated production (red). The background MC samples are described in the publication. The background MC and the two signal distributions are normalised to unit area. png (95kB) eps (43kB) pdf (19kB) |
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063: Invariant mass distributions for a Higgs boson with mH = 125 GeV, for the best-resolution category (Unconverted central, high pTt) shown in blue and for a category with lower resolution (Converted rest, low pTt) shown in red (see Table 4 of the publication), for the root s = 8TeV simulation. The invariant mass distribution is parametrized by the sum of a Crystal Ball function and a broad Gaussian, where the latter accounts for fewer than 12% of events in all categories (fewer than 4% in most categories). png (91kB) eps (20kB) pdf (15kB) |
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Figure
064a: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (86kB) eps (46kB) pdf (12kB) |
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064b: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (82kB) eps (44kB) pdf (12kB) |
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064c: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (71kB) eps (33kB) pdf (9kB) |
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064d: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (71kB) eps (35kB) pdf (9kB) |
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064e: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (86kB) eps (67kB) pdf (20kB) |
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064f: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (89kB) eps (68kB) pdf (20kB) |
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064g: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (80kB) eps (46kB) pdf (13kB) |
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064h: Background-only fits to the diphoton invariant mass spectra for categories Unconverted central, low pTt, Unconverted central, high pTt, Unconverted rest, low pTt and Unconverted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) correspond to the root s = 7TeV data sample and figures (b), (d), (f), (h) to the root s = 8TeV data sample. png (77kB) eps (46kB) pdf (14kB) |
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065a: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (83kB) eps (44kB) pdf (12kB) |
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065b: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (87kB) eps (45kB) pdf (12kB) |
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065c: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (68kB) eps (33kB) pdf (9kB) |
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065d: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (71kB) eps (33kB) pdf (9kB) |
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065e: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (87kB) eps (67kB) pdf (20kB) |
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065f: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (88kB) eps (68kB) pdf (20kB) |
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065g: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (75kB) eps (43kB) pdf (12kB) |
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065h: Background-only fits to the diphoton invariant mass spectra for categories Converted central, low pTt, Converted central, high pTt, Converted rest, low pTt and Converted rest, high pTt. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a), (c), (e), (g) show the root s = 7TeV data sample and figures (b), (d), (f), (h) show the root s = 8TeV data sample. png (77kB) eps (45kB) pdf (12kB) |
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066a: Background-only fits to the diphoton invariant mass spectra for categories Converted transition and 2-jets. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a) and (c) show the root s = 7TeV data sample and figures (b) and (d) show the root s = 8TeV data sample. png (85kB) eps (66kB) pdf (19kB) |
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066b: Background-only fits to the diphoton invariant mass spectra for categories Converted transition and 2-jets. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a) and (c) show the root s = 7TeV data sample and figures (b) and (d) show the root s = 8TeV data sample. png (92kB) eps (68kB) pdf (20kB) |
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066c: Background-only fits to the diphoton invariant mass spectra for categories Converted transition and 2-jets. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a) and (c) show the root s = 7TeV data sample and figures (b) and (d) show the root s = 8TeV data sample. png (59kB) eps (32kB) pdf (9kB) |
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066d: Background-only fits to the diphoton invariant mass spectra for categories Converted transition and 2-jets. The bottom inset displays the residual of the data with respect to the background fit. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. Figures (a) and (c) show the root s = 7TeV data sample and figures (b) and (d) show the root s = 8TeV data sample. png (70kB) eps (35kB) pdf (9kB) |
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067: Invariant mass distribution of diphoton candidates for the combined root s = 7TeV and root s = 8TeV data samples. The result of a fit to the data of the sum of a signal component fixed to mH = 126.5GeV and a background component described by a fourth-order Bernstein polynomial is superimposed. The bottom inset displays the residuals of the data with respect to the fitted background component. png (92kB) eps (26kB) pdf (11kB) |
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068: The weighted distribution of invariant mass of diphoton candidates for the combined root s = 7TeV and root s = 8TeV data samples. The weight wi for category i from [1, 10] is defined to be ln (1 + Si/Bi), where Si is 90% of the expected signal for mH = 126.5 GeV, and Bi is the integral, in a window containing Si, of a background-only fit to the data. The values Si/Bi have only a mild dependence on mH. The result of a fit to the data of the sum of a signal component fixed to mH = 126.5GeV and a background component described by a fourth-order Bernstein polynomial is superimposed. The bottom inset displays the residuals of the data with respect to the fitted background component. png (87kB) eps (24kB) pdf (8kB) |
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069: Invariant mass distribution of diphoton candidates for the combined root s = 7TeV and root s = 8TeV data samples, overlaid with the total background obtained from summing the fitted background only models to the distributions in the individual categories. The bottom inset displays the residual of the data with respect to the total background. The Higgs boson expectation for a mass hypothesis of 126.5GeV corresponding to the SM cross section is also shown. png (96kB) eps (39kB) pdf (13kB) |
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070: Expected and observed local p0 values for a SM Higgs boson as a function of the hypothesized Higgs boson mass (mH) for the combined analysis and for the root s = 7TeV and root s = 8TeV data samples separately. The observed p0 including the effect of the photon energy scale uncertainty on the mass position is included via pseudo-experiments and shown as open circles. png (117kB) eps (22kB) pdf (10kB) |
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071: Expected and observed local p0 for the analysis using 10 categories, compared to an analysis using only 9 categories (no 2-jets category) and a fully inclusive analysis for the combined root s = 7TeV and root s = 8TeV data. png (97kB) eps (46kB) pdf (9kB) |
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072a: Observed and expected CLs limit on the normalised signal strength as a function of the assumed Higgs boson mass for the root s = 7TeV (a) and root s = 8TeV (b) analyses. The dark (green) and light (yellow) bands indicate the expected limits with +- 1 sigma and +- 2 sigma fluctuations, respectively. png (72kB) eps (18kB) pdf (8kB) |
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072b: Observed and expected CLs limit on the normalised signal strength as a function of the assumed Higgs boson mass for the root s = 7TeV (a) and root s = 8TeV (b) analyses. The dark (green) and light (yellow) bands indicate the expected limits with +- 1 sigma and +- 2 sigma fluctuations, respectively. png (69kB) eps (18kB) pdf (8kB) |
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073: Expected and observed CLs limit on the normalised signal strength as a function of the assumed Higgs boson mass for the combined root s = 7TeV and root s = 8TeV analysis. The dark (green) and light (yellow) bands indicate the expected limits with +- 1 sigma and +- 2 sigma fluctuations, respectively. png (67kB) eps (18kB) pdf (7kB) |
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074a: Best fit value for the signal strength as a function of the assumed Higgs boson mass for the root s = 7TeV (a) and root s = 8TeV (b) analyses. png (71kB) eps (15kB) pdf (7kB) |
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074b: Best fit value for the signal strength as a function of the assumed Higgs boson mass for the root s = 7TeV (a) and root s = 8TeV (b) analyses. png (66kB) eps (15kB) pdf (7kB) |
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075a: Best fit value for the signal strength as a function of the assumed Higgs boson mass for the combined analysis (a). The expected signal strength as a function of mH when a SM Higgs boson signal with mH = 126.5 GeV is injected (b). png (76kB) eps (16kB) pdf (7kB) |
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075b: Best fit value for the signal strength as a function of the assumed Higgs boson mass for the combined analysis (a). The expected signal strength as a function of mH when a SM Higgs boson signal with mH = 126.5 GeV is injected (b). png (65kB) eps (19kB) pdf (6kB) |
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076a: Best fit value for the signal strength in the different categories at mH = 126.5GeV for the root s = 7TeV (a) and the root s = 8TeV (b) data sample and for the combined root s = 7TeV and root s = 8TeV data samples (c). The blue band corresponds to the error of the combined result. png (60kB) eps (11kB) pdf (5kB) |
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076b: Best fit value for the signal strength in the different categories at mH = 126.5GeV for the root s = 7TeV (a) and the root s = 8TeV (b) data sample and for the combined root s = 7TeV and root s = 8TeV data samples (c). The blue band corresponds to the error of the combined result. png (61kB) eps (11kB) pdf (5kB) |
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076c: Best fit value for the signal strength in the different categories at mH = 126.5GeV for the root s = 7TeV (a) and the root s = 8TeV (b) data sample and for the combined root s = 7TeV and root s = 8TeV data samples (c). The blue band corresponds to the error of the combined result. png (66kB) eps (12kB) pdf (5kB) |
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077a: Best fit value for the signal strength in the different categories at mH = 126GeV for the root s = 7TeV (a) and the root s = 8TeV (b) data sample and for the combined root s = 7TeV and root s = 8TeV data samples (c). The blue band corresponds to the error of the combined result. png (60kB) eps (11kB) pdf (5kB) |
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077b: Best fit value for the signal strength in the different categories at mH = 126GeV for the root s = 7TeV (a) and the root s = 8TeV (b) data sample and for the combined root s = 7TeV and root s = 8TeV data samples (c). The blue band corresponds to the error of the combined result. png (61kB) eps (11kB) pdf (5kB) |
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077c: Best fit value for the signal strength in the different categories at mH = 126GeV for the root s = 7TeV (a) and the root s = 8TeV (b) data sample and for the combined root s = 7TeV and root s = 8TeV data samples (c). The blue band corresponds to the error of the combined result. png (64kB) eps (11kB) pdf (5kB) |
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078: Confidence intervals contours for the H to gamma gamma channel in the (mu, mH) plane. The 68% and 95% CL contours are for the combined root s = 7TeV and root s = 8TeV analysis. The light lines indicate the effect of holding constant at their best-fit values the nuisance parameters which describe the energy scale systematic (ESS) uncertainties in the likelihood function. png (78kB) eps (14kB) pdf (6kB) |
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079: Jet multiplicity in the root s = 7TeV data compared to simulation. The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater than 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data-driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (64kB) eps (17kB) pdf (6kB) |
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080a: Leading and sub-leading jet pT (a) and (b) and eta (c) and (d) distributions in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (77kB) eps (23kB) pdf (7kB) |
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080b: Leading and sub-leading jet pT (a) and (b) and eta (c) and (d) distributions in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (72kB) eps (22kB) pdf (7kB) |
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080c: Leading and sub-leading jet pT (a) and (b) and eta (c) and (d) distributions in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (85kB) eps (26kB) pdf (8kB) |
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Figure
080d: Leading and sub-leading jet pT (a) and (b) and eta (c) and (d) distributions in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (91kB) eps (27kB) pdf (8kB) |
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Figure
081a: Delta eta_jj, the eta separation of the leading and sub-leading jet (a), the dijet invariant mass (b), and the Delta phi_gammagamma,jj, the phi separation between the diphoton and the dijet system (c) in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater than 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data-driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (77kB) eps (23kB) pdf (7kB) |
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Figure
081b: Delta eta_jj, the eta separation of the leading and sub-leading jet (a), the dijet invariant mass (b), and the Delta phi_gammagamma,jj, the phi separation between the diphoton and the dijet system (c) in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater than 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data-driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (84kB) eps (24kB) pdf (8kB) |
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Figure
081c: Delta eta_jj, the eta separation of the leading and sub-leading jet (a), the dijet invariant mass (b), and the Delta phi_gammagamma,jj, the phi separation between the diphoton and the dijet system (c) in the root s = 7TeV data compared to simulation for events that have at least two jets fulfilling the following criteria: The jets are required to be within abs(eta_jet)less than 4.5 and have p_jetT greater than 25GeV. The uncertainties on the background components take both the statistical uncertainties of the simulation samples and the uncertainties from the data-driven background decomposition into account. The distributions are normalised to unit area to allow for a comparison of the shapes of data and background simulation, and of background and signal simulation. Events from data and background simulation are taken from the mass range between 100GeV and 160GeV. png (69kB) eps (21kB) pdf (7kB) |
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Figure
082a: Observed local p0 values obtained from fits to single categories for the root s = 7TeV data (a) and the root s = 8TeV (b), along with the result from the combined fit. png (159kB) eps (31kB) pdf (15kB) |
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Figure
082b: Observed local p0 values obtained from fits to single categories for the root s = 7TeV data (a) and the root s = 8TeV (b), along with the result from the combined fit. png (154kB) eps (32kB) pdf (16kB) |
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Figure
083a: Observed local significances obtained from fits to single categories for the root s = 7TeV data (a) and the root s = 8TeV (b), along with the result from the combined fit. png (201kB) eps (30kB) pdf (16kB) |
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Figure
083b: Observed local significances obtained from fits to single categories for the root s = 7TeV data (a) and the root s = 8TeV (b), along with the result from the combined fit. png (188kB) eps (24kB) pdf (12kB) |
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Figure
084a: Weighted local significances observed for root s = 7TeV (a) and root s = 8TeV (b) data as a function of mH. It shows the contribution of the individual categories (colored curves) to the combined result (black). The weights wi are shown in the right side bar and reflect the expected contribution from each individual category for a SM Higgs boson. They are obtained as wi = sigma^2/ sigma^2_i , where sigma_i and sigma are the expected statistical uncertainties on the signal strength per category i and for the combined analysis, respectively. The weighted significances Z'_i are defined as Z'_i = root(wi)Z_i. The sum of the weighted significances of the categories is approximately equal to the combined significance. png (141kB) eps (26kB) pdf (12kB) |
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Figure
084b: Weighted local significances observed for root s = 7TeV (a) and root s = 8TeV (b) data as a function of mH. It shows the contribution of the individual categories (colored curves) to the combined result (black). The weights wi are shown in the right side bar and reflect the expected contribution from each individual category for a SM Higgs boson. They are obtained as wi = sigma^2/ sigma^2_i , where sigma_i and sigma are the expected statistical uncertainties on the signal strength per category i and for the combined analysis, respectively. The weighted significances Z'_i are defined as Z'_i = root(wi)Z_i. The sum of the weighted significances of the categories is approximately equal to the combined significance. png (139kB) eps (26kB) pdf (11kB) |
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Figure
085: Weighted local significances observed for the combination of root s = 7TeV and root s = 8TeV data as a function of mH. It shows the contribution of the individual categories (colored curves) to the combined result (black). The weights wi are shown in the right side bar and reflect the expected contribution from each individual category for a SM Higgs boson. They are obtained as wi = sigma^2/sigma^2_i , where sigma_i and sigma are the expected statistical uncertainties on the signal strength per category i and for the combined analysis, respectively. The weighted significances Z'_i are defined as Z'_i = root(wi)Z'_i. The sum of the weighted significances of the categories is approximately equal to the combined significance. png (143kB) eps (27kB) pdf (12kB) |
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Figure
086a: Weighted local significances observed for root s = 7TeV (a) and root s = 8TeV (b) data as a function of mH, which are the same as Fig. 84 but the range of the vertical axis is reduced. The result of the combined significance is omitted comparing to Fig. 84. png (172kB) eps (27kB) pdf (12kB) |
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Figure
086b: Weighted local significances observed for root s = 7TeV (a) and root s = 8TeV (b) data as a function of mH, which are the same as Fig. 84 but the range of the vertical axis is reduced. The result of the combined significance is omitted comparing to Fig. 84. png (169kB) eps (27kB) pdf (12kB) |
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Figure
087: Weighted local significances observed for the combination of root s = 7TeV and root s = 8TeV data as a function of mH, which is the same as Fig. 85 but the range of the vertical axis is reduced. The result of the combined significance is omitted comparing to Fig. 85. png (174kB) eps (28kB) pdf (12kB) |
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Figure
088: Observed and expected local significances obtained with the analysis using the inclusive category, compared with the result using the ten categories, for the combined 7TeV and 8TeV data samples. png (88kB) eps (28kB) pdf (6kB) |
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Figure
089: Comparison of the expected and observed capped local p0 values obtained for the root s = 7TeV data sample with the analysis published in a previous publication and the new analysis presented here. The capped p0 is shown for consistency with the prescription used in the previous publication. png (79kB) eps (15kB) pdf (6kB) |
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Figure
090a: Etmiss_rel (a) and multiplicity of jets (b) for events satisfying the dilepton and Etmiss_rel selection of the H to WW to lnln analysis. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The hashed area indicates the total uncertainty on the background prediction. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The expected signal for a SM Higgs boson with mH=125GeV is superimposed. png (101kB) eps (43kB) pdf (14kB) |
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Figure
090b: Etmiss_rel (a) and multiplicity of jets (b) for events satisfying the dilepton and Etmiss_rel selection of the H to WW to lnln analysis. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The hashed area indicates the total uncertainty on the background prediction. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The expected signal for a SM Higgs boson with mH=125GeV is superimposed. png (63kB) eps (20kB) pdf (7kB) |
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Figure
091: Ratio of the number of Z to mumu + 1 jet events to the total number of Z to mumu events as a function of the number of reconstructed primary vertices in the event. With the jet selection defined for the H to WW to lnln analysis, the simulation reproduces the data well and there is no strong trend as a function of the number of vertices. Z candidates are selected as di-muon events using the muon definitions of the H to WW to lnln analysis, with the additional requirement abs(m_mumu - m_Z) lt 15 GeV. Only statistical uncertainties are included. png (49kB) eps (12kB) pdf (7kB) |
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Figure
092a: Distribution of m_T (a) and Deltaphi_ll (b) in the same-sign validation region, which consists of events passing the dilepton and ETmiss_rel requirements of the H to WW to lnln analysis, except that the leptons are required to have the same charge. In addition, events shown here have zero reconstructed jets. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The hashed area indicates the total uncertainty on the background prediction. png (92kB) eps (27kB) pdf (10kB) |
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Figure
092b: Distribution of m_T (a) and Deltaphi_ll (b) in the same-sign validation region, which consists of events passing the dilepton and ETmiss_rel requirements of the H to WW to lnln analysis, except that the leptons are required to have the same charge. In addition, events shown here have zero reconstructed jets. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The hashed area indicates the total uncertainty on the background prediction. png (104kB) eps (30kB) pdf (11kB) |
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Figure
093a: Distributions of the mT variable in the OneJet (a), TwoJet (b) top control and validation regions, which are defined by the presence of a b-tagged jet. The OneJet top control region is identical to the OneJet signal region except that the veto on a b-tagged jet is reversed. The TwoJet top validation region used here is defined by the requirement of two or more jets, one of which is b-tagged jet, after the dilepton and ETmiss_rel preselection. It is larger than but contains the sample used to normalise the top background in the TwoJet analysis. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. No normalisation factors are applied to the simulated data. The hashed area indicates the total uncertainty on the background prediction. png (97kB) eps (29kB) pdf (10kB) |
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Figure
093b: Distributions of the mT variable in the OneJet (a), TwoJet (b) top control and validation regions, which are defined by the presence of a b-tagged jet. The OneJet top control region is identical to the OneJet signal region except that the veto on a b-tagged jet is reversed. The TwoJet top validation region used here is defined by the requirement of two or more jets, one of which is b-tagged jet, after the dilepton and ETmiss_rel preselection. It is larger than but contains the sample used to normalise the top background in the TwoJet analysis. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. No normalisation factors are applied to the simulated data. The hashed area indicates the total uncertainty on the background prediction. png (96kB) eps (29kB) pdf (11kB) |
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Figure
094a: m_T distributions in the WW control regions for the ZeroJet (a) and OneJet (b) channels of the H to WW to lnln analysis. The WW control region is defined identically to the signal region for both, except that the Deltaphi_ll lt 1.8 requirement is released and m_ll gt 80 GeV is required. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The top backgrounds are scaled using the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (94kB) eps (32kB) pdf (12kB) |
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Figure
094b: m_T distributions in the WW control regions for the ZeroJet (a) and OneJet (b) channels of the H to WW to lnln analysis. The WW control region is defined identically to the signal region for both, except that the Deltaphi_ll lt 1.8 requirement is released and m_ll gt 80 GeV is required. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The top backgrounds are scaled using the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (116kB) eps (37kB) pdf (13kB) |
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Figure
095a: Transverse mass, mT, distribution in the ZeroJet (first and second plots) and OneJet channels (third and fourth plots), for events satisfying all signal selection criteria for the H to WW to lnln analysis. The (a) and (c) plots show the events with a subleading muon, and the (b) and (d) plots show the events with a subleading electron. The expected signal for a SM Higgs boson with mH=125 GeV is superimposed. The W+jets background is estimated using data and WW and top backgrounds are scaled using the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (78kB) eps (25kB) pdf (8kB) |
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095b: Transverse mass, mT, distribution in the ZeroJet (first and second plots) and OneJet channels (third and fourth plots), for events satisfying all signal selection criteria for the H to WW to lnln analysis. The (a) and (c) plots show the events with a subleading muon, and the (b) and (d) plots show the events with a subleading electron. The expected signal for a SM Higgs boson with mH=125 GeV is superimposed. The W+jets background is estimated using data and WW and top backgrounds are scaled using the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (79kB) eps (25kB) pdf (8kB) |
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095c: Transverse mass, mT, distribution in the ZeroJet (first and second plots) and OneJet channels (third and fourth plots), for events satisfying all signal selection criteria for the H to WW to lnln analysis. The (a) and (c) plots show the events with a subleading muon, and the (b) and (d) plots show the events with a subleading electron. The expected signal for a SM Higgs boson with mH=125 GeV is superimposed. The W+jets background is estimated using data and WW and top backgrounds are scaled using the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (94kB) eps (27kB) pdf (9kB) |
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095d: Transverse mass, mT, distribution in the ZeroJet (first and second plots) and OneJet channels (third and fourth plots), for events satisfying all signal selection criteria for the H to WW to lnln analysis. The (a) and (c) plots show the events with a subleading muon, and the (b) and (d) plots show the events with a subleading electron. The expected signal for a SM Higgs boson with mH=125 GeV is superimposed. The W+jets background is estimated using data and WW and top backgrounds are scaled using the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (87kB) eps (26kB) pdf (8kB) |
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Figure
096: The mT distribution in data with the estimated background subtracted, overlaid with the predicted signal for mH = 125 GeV. The distributions are summed for the ZeroJet and OneJet H to WW to lnln analyses. The statistical uncertainties of both the data and the subtracted background are reflected in the data points. The systematic uncertainty on the background estimate is not included. png (53kB) eps (16kB) pdf (6kB) |
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Figure
097a: (a): observed (solid line) probability p_0 for the background-only scenario as a function of mH for the 8 TeV data. The dashed line shows the corresponding expectation for the signal+background hypothesis at the given value of mH. (b): fitted signal strength parameter mu for the 8 TeV data as a function of mH for the low mass range. png (72kB) eps (18kB) pdf (10kB) |
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097b: (a): observed (solid line) probability p_0 for the background-only scenario as a function of mH for the 8 TeV data. The dashed line shows the corresponding expectation for the signal+background hypothesis at the given value of mH. (b): fitted signal strength parameter mu for the 8 TeV data as a function of mH for the low mass range. png (56kB) eps (12kB) pdf (7kB) |
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098: The mT distribution in data with the estimated background subtracted, overlaid with the predicted signal for mH = 125 GeV. The distributions are summed for the ZeroJet and OneJet analyses and the 7 TeV and 8 TeV data. The statistical uncertainties of both the data and the subtracted background are reflected in the data points. The systematic uncertainty on the background estimate is not included. png (53kB) eps (15kB) pdf (6kB) |
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Figure
099: Observed (solid line) probability p_0 for the background-only scenario as a function of mH for the combined 2011 and 2012 data. The dashed line shows the corresponding expectation for the mH = 126 GeV hypothesis. The green and yellow regions indicate the +- 1sigma and +- 2sigma uncertainty bands on the expected limit, respectively. png (74kB) eps (22kB) pdf (11kB) |
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Figure
100a: Combined 7 TeV and 8 TeV results for the H to WW(*) to l nu l nu channel. (a): observed (solid line) probability p_0 for the background-only scenario as a function of mH. The dashed line shows the corresponding expectation for the signal+background hypothesis at the given value of mH. (b): fitted signal strength parameter mu as a function of mH for the low mass range. The expected result for a signal hypothesis of mH = 126 GeV (solid line) is included for comparison. png (69kB) eps (17kB) pdf (9kB) |
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100b: Combined 7 TeV and 8 TeV results for the H to WW(*) to l nu l nu channel. (a): observed (solid line) probability p_0 for the background-only scenario as a function of mH. The dashed line shows the corresponding expectation for the signal+background hypothesis at the given value of mH. (b): fitted signal strength parameter mu as a function of mH for the low mass range. The expected result for a signal hypothesis of mH = 126 GeV (solid line) is included for comparison. png (76kB) eps (15kB) pdf (10kB) |
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Figure
101a: Additional distributions for the same-sign validation region, which consists of events passing the dilepton and ETmiss_rel requirements of the H to WW to lnln analysis, except that the leptons are required to have the same charge. The top two figures show the leading lepton pt and sub-leading lepton pt after the zero jet requirement of the ZeroJet channel, and the bottom two show the leading lepton pt and sub-leading lepton pt after the one jet requirement of the OneJet channel. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The hashed area indicates the total uncertainty on the background prediction. png (82kB) eps (26kB) pdf (8kB) |
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Figure
101b: Additional distributions for the same-sign validation region, which consists of events passing the dilepton and ETmiss_rel requirements of the H to WW to lnln analysis, except that the leptons are required to have the same charge. The top two figures show the leading lepton pt and sub-leading lepton pt after the zero jet requirement of the ZeroJet channel, and the bottom two show the leading lepton pt and sub-leading lepton pt after the one jet requirement of the OneJet channel. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The hashed area indicates the total uncertainty on the background prediction. png (76kB) eps (24kB) pdf (8kB) |
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Figure
101c: Additional distributions for the same-sign validation region, which consists of events passing the dilepton and ETmiss_rel requirements of the H to WW to lnln analysis, except that the leptons are required to have the same charge. The top two figures show the leading lepton pt and sub-leading lepton pt after the zero jet requirement of the ZeroJet channel, and the bottom two show the leading lepton pt and sub-leading lepton pt after the one jet requirement of the OneJet channel. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The hashed area indicates the total uncertainty on the background prediction. png (88kB) eps (29kB) pdf (10kB) |
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Figure
101d: Additional distributions for the same-sign validation region, which consists of events passing the dilepton and ETmiss_rel requirements of the H to WW to lnln analysis, except that the leptons are required to have the same charge. The top two figures show the leading lepton pt and sub-leading lepton pt after the zero jet requirement of the ZeroJet channel, and the bottom two show the leading lepton pt and sub-leading lepton pt after the one jet requirement of the OneJet channel. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The hashed area indicates the total uncertainty on the background prediction. png (77kB) eps (26kB) pdf (8kB) |
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Figure
102a: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis: ptll after the dilepton, ETmiss_rel, and jet veto requirements (a); and m_ll after the ptll threshold is applied but before the requirements on m_ll and Deltaphi_ll (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (88kB) eps (27kB) pdf (8kB) |
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Figure
102b: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis: ptll after the dilepton, ETmiss_rel, and jet veto requirements (a); and m_ll after the ptll threshold is applied but before the requirements on m_ll and Deltaphi_ll (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (95kB) eps (30kB) pdf (10kB) |
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Figure
103a: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (75kB) eps (25kB) pdf (7kB) |
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103b: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (84kB) eps (27kB) pdf (8kB) |
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103c: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (69kB) eps (22kB) pdf (7kB) |
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103d: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (78kB) eps (25kB) pdf (8kB) |
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Figure
104a: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): leading lepton pt (a) and sub-leading lepton pt (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (74kB) eps (25kB) pdf (8kB) |
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104b: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): leading lepton pt (a) and sub-leading lepton pt (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (73kB) eps (24kB) pdf (7kB) |
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105a: Kinematic distributions in the OneJet channel of the H to WW to lnln analysis: abs(bf p_rm T^rm tot)after the dilepton, ETmiss_rel, and b-jet veto requirements (a); m_ll after the Z to tautau veto but before the requirements on m_ll and Deltaphi_ll (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (86kB) eps (25kB) pdf (8kB) |
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105b: Kinematic distributions in the OneJet channel of the H to WW to lnln analysis: abs(bf p_rm T^rm tot)after the dilepton, ETmiss_rel, and b-jet veto requirements (a); m_ll after the Z to tautau veto but before the requirements on m_ll and Deltaphi_ll (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (102kB) eps (31kB) pdf (11kB) |
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106a: Kinematic distributions in the OneJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (88kB) eps (27kB) pdf (8kB) |
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Figure
106b: Kinematic distributions in the OneJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (85kB) eps (28kB) pdf (8kB) |
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Figure
106c: Kinematic distributions in the OneJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (71kB) eps (22kB) pdf (7kB) |
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Figure
106d: Kinematic distributions in the OneJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): ptll, Deltaphi_ll, m_ll, and mT. The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (93kB) eps (27kB) pdf (9kB) |
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Figure
107a: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): leading lepton pt (a) and sub-leading lepton pt (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (86kB) eps (28kB) pdf (9kB) |
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Figure
107b: Kinematic distributions in the ZeroJet channel of the H to WW to lnln analysis after the full event selection (up through Deltaphi_ll lt 1.8): leading lepton pt (a) and sub-leading lepton pt (b). The emu and mu e channels, distinguished by the flavour of the subleading lepton, are combined. The expected signal shown is for mH = 125GeV. The WW and top backgrounds are scaled to use the normalisation derived from the corresponding control regions. The hashed area indicates the total uncertainty on the background prediction. png (75kB) eps (24kB) pdf (7kB) |
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108a: Observed (solid) and expected (dashed) 95% CL upper limits on the cross section, normalised to the SM Higgs boson production cross section and as a function of mH, over the full mass range considered in the 8 TeV only analysis (a) and 7 and 8 TeV combined analysis (b). The green and yellow regions indicate the +- 1sigma and +- 2sigma uncertainty bands on the expected limit, respectively. Due to the excess of events observed in the low mass signal region, the corresponding mass points cannot be excluded as expected. The results at neighbouring mass points are highly correlated due to the limited mass resolution in this final state. png (65kB) eps (14kB) pdf (8kB) |
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108b: Observed (solid) and expected (dashed) 95% CL upper limits on the cross section, normalised to the SM Higgs boson production cross section and as a function of mH, over the full mass range considered in the 8 TeV only analysis (a) and 7 and 8 TeV combined analysis (b). The green and yellow regions indicate the +- 1sigma and +- 2sigma uncertainty bands on the expected limit, respectively. Due to the excess of events observed in the low mass signal region, the corresponding mass points cannot be excluded as expected. The results at neighbouring mass points are highly correlated due to the limited mass resolution in this final state. png (67kB) eps (14kB) pdf (8kB) |
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109: The local probability p0 (uncapped) for a background-only experiment to be more signal- like than the observation as a function of mH reported (cover) in Phys. Lett. B 716 (2012) 1-29. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (88kB) eps (27kB) pdf (8kB) |
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110a: The local probability p0 (capped) for a background-only experiment to be more signal-like than the observation as a function of mH presented at the EPS-HEP conference in Grenoble in Summer 2011 (CERN-PH-EP-2011-112), in the low mass range. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (76kB) eps (21kB) pdf (6kB) |
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110b: The local probability p0 (capped) for a background-only experiment to be more signal-like than the observation as a function of mH presented at the EPS-HEP conference in Grenoble in Summer 2011 (CERN-PH-EP-2011-112), in the full search domain. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (72kB) eps (19kB) pdf (6kB) |
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111a: In addition to the Figure 110(a), the local probability p0 (capped) for a background-only experiment to be more signal-like than the observation as a function of mH presented at December 2011 CERN council meeting (ATLAS-CONF-2011-163) in the low mass range. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (101kB) eps (22kB) pdf (6kB) |
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111b: In addition to Figure 110(b), the local probability p0 (capped) for a background-only experiment to be more signal-like than the observation as a function of mH presented at December 2011 CERN council meeting (ATLAS-CONF-2011-163) in the full search domain. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (92kB) eps (20kB) pdf (6kB) |
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112a: In addition to Figure 111(a), the local probability p0 (uncapped) for a background-only experiment to be more signal-like than the observation as a function of mH reported in the spring 2012 Phys. Rev. D publication (Phys. Rev. D86 (2012) 032003) in the low mass range. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (128kB) eps (24kB) pdf (7kB) |
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112b: In addition to Figure 111(b), the local probability p0 (uncapped) for a background-only experiment to be more signal-like than the observation as a function of mH reported in the spring 2012 Phys. Rev. D publication (Phys. Rev. D86 (2012) 032003) in the full search domain. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (109kB) eps (22kB) pdf (7kB) |
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113a: In addition to Figure 112(a), the local probability p0 (uncapped) for a background-only experiment to be more signal-like than the observation as a function of mH presented at the summer 2012 ICHEP conference in Melbourne (ATLAS-CONF-2012-093) in the low mass range. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (161kB) eps (26kB) pdf (7kB) |
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113b: In addition to Figure 112(b), the local probability p0 (uncapped) for a background-only experiment to be more signal-like than the observation as a function of mH presented at the summer 2012 ICHEP conference in Melbourne (ATLAS-CONF-2012-093) in the full search domain. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (134kB) eps (24kB) pdf (8kB) |
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114a: In addition to Figure 113(a), the local probability p0 (uncapped) for a background-only experiment to be more signal-like than the observation as a function of mH reported in Phys. Lett. B 716 (2012) 1-29, in the low mass range. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (180kB) eps (27kB) pdf (8kB) |
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114b: In addition to Figure 113(b), the local probability p0 (uncapped) for a background-only experiment to be more signal-like than the observation as a function of mH reported in Phys. Lett. B 716 (2012) 1-29, in the full search domain. The dashed curve shows the median expected local p0 under the hypothesis of a Standard Model Higgs boson production signal at that mass. The horizontal dashed lines indicate the p-values corresponding to significances of 1σ to 6σ. png (150kB) eps (25kB) pdf (8kB) |
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