Summary plots from the ATLAS Top physics group

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Summary plots from the ATLAS Top physics group
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Summary of the charge asymmetry measurements on ATLAS and CMS at 7 TeV showing both the ttbar-based and lepton-based asymmetry measurements, compared to the respective theory predictions. The uncertainty on the theory predictions is shown but is very small. Status of figure: September 2015 (Top 2015) png 57kB, pdf 14kB This and previous plot versions
Summary of the charge asymmetry measurements on ATLAS and CMS at 8 TeV showing both inclusive measurements and the measurement using boosted events which is restricted to $M_{t\bar{t}}>0.75$ TeV and $\|\Delta \|y\|\|<2$, compared to the respective theory predictions. The uncertainty on the theory predictions is shown but is very small. Status of figure: September 2017 (TOP 2017), from the ATLAS+CMS combination paper png 81kB, pdf 41kB This and previous plot versions
Summary of the current 95% confidence level observed limits on the branching ratios of the top quark decays via flavour changing neutral currents to a quark and a neutral boson t->Xq (X=g, Z, γ or H; q=u or c) by the ATLAS and CMS Collaborations compared to several new physics models. Status of figure: September 2018 (Top2018) png 133kB, pdf 65kB This and previous plot versions
Summary of the current 95% confidence level observed limits on the branching ratios of the top quark decays via flavour changing neutral currents to a charm quark and a neutral boson t->Xc (X=g, Z, γ or H). The coloured lines represent the results from HERA (the most stringent limits between the ones obtained by the H1 and ZEUS collaborations, in brown), LEP (combined ALEPH, DELPHI, L3 and OPAL collaborations result, in green), TEVATRON (the most stringent limits between the ones obtained by the CDF and D0 collaborations, in grey). The yellow area represents the region excluded by the ATLAS and the CMS Collaborations. Status of figure: September 2018 (Top2018) png 57kB, pdf 19kB This and previous plot versions
Summary of the current 95% confidence level observed limits on the branching ratios of the top quark decays via flavour changing neutral currents to an up quark and a neutral boson t->Xu (X=g, Z, γ or H). The coloured lines represent the results from HERA (the most stringent limits between the ones obtained by the H1 and ZEUS collaborations, in brown), LEP (combined ALEPH, DELPHI, L3 and OPAL collaborations result, in green), TEVATRON (the most stringent limits between the ones obtained by the CDF and D0 collaborations, in grey). The yellow area represents the region excluded by the ATLAS and CMS Collaborations. Status of figure: September 2018 (Top2018) png 56kB, pdf 19kB This and previous plot versions
Summary of the ATLAS direct m_top measurements. The figure shows the latest results, as well as previous results that are now superseeded. The results are compared with the ATLAS, Tevatron and Tevatron+LHC m_top combinations. For each measurement, the statistical uncertainty, the jet scale factor (JSF) and b-jet scale factor (bJSF) contributions (when applicable) as well as the sum of the remaining uncertainties are reported separately. The JSF, bJSF contributions are statistical in nature and apply to analyses performing in-situ (top quark pair base) jet energy calibration procedures. Status of figure: September 2017 (Top2017) png 145kB, pdf 19kB This and previous plot versions
Summary of the measurements of the top quark pole mass, compared to direct measurements. Status of figure: September 2018 (Top2018) png 51kB, pdf 14kB This and previous plot versions
Summary of the latest ATLAS direct m_top measurements. The results are compared to the ATLAS, Tevatron and Tevatron+LHC m_top combinations. For each measurement, the statistical uncertainty, the jet scale factor (JSF) and b-jet scale factor (bJSF) contributions (when applicable) as well as the sum of the remaining uncertainties are reported separately. The JSF, bJSF contributions are statistical in nature and apply to analyses performing in-situ (top quark pair base) jet energy calibration procedures. Status of figure: September 2017 (Top 2017) png 122kB, pdf 17kB This and previous plot versions
Summary of the latest ATLAS direct m_top measurements. The results are compared with the ATLAS m_top combination. For each measurement, the statistical uncertainty, the jet scale factor (JSF) and b-jet scale factor (bJSF) contributions (when applicable) as well as the sum of the remaining uncertainties are reported separately. The JSF, bJSF contributions are statistical in nature and apply to analyses performing in-situ (top quark pair base) jet energy calibration procedures. Status of figure: September 2017 (Top 2017) png 110kB, pdf 17kB This and previous plot versions
Summary of the ATLAS and CMS direct m_top measurements. The results are compared with the LHC and Tevatron+LHC m_top combinations. For each measurement, the statistical uncertainty, the jet scale factor (JSF) and b-jet scale factor (bJSF) contributions (when applicable) as well as the sum of the remaining uncertainties are reported separately. The JSF, bJSF contributions are statistical in nature and apply to analyses performing in-situ (top quark pair base) jet energy calibration procedures. Status of figure: September 2018 (Top2018) png 54kB, pdf 17kB This and previous plot versions
Summary of ATLAS and CMS measurements of the single top production cross-sections in various channels as a function of the center of mass energy. The measurements are compared to theoretical calculations based on: NLO QCD, NLO QCD complemented with NNLL resummation and NNLO QCD (t-channel only). Status of figure: September 2018 (Top2018) png 41kB, pdf 19kB This and previous plot versions
Summary of ATLAS measurements of the single top production cross-sections in various channels as a function of the center of mass energy compared to theoretical calculations based on NLO QCD and on NLO QCD complemented with NNLL resummation. Status of figure: September 2018 (Top2018) png 151kB, pdf 18kB This and previous plot versions
Summary of the ATLAS measurements of R_t, the ratio of the t-channel top-quark production cross-section to the t-channel anti-top-quark production cross-section. The data measurements are compared to NLO QCD calculations using the ABM, HERAPDF 2.0 and JR14 PDF sets. The coloured bands represent the uncertainties on the theoretical predictions (scale and PDF uncertainties). Status of figure: September 2018 (Top2018) png 33kB, pdf 16kB This and previous plot versions
Summary of the ATLAS measurements of R_t, the ratio of the t-channel top-quark production cross-section to the t-channel anti-top-quark production cross-section. The data measurements are compared to NLO QCD calculations using the CT14, NNPDF 3.0 and MMHT2014 PDF sets. The coloured bands represent the uncertainties on the theoretical predictions (scale and PDF uncertainties). Status of figure: September 2018 (Top2018) png 31kB, pdf 16kB This and previous plot versions
Summary of the ATLAS and CMS Collaboration measurements of the single top production cross-sections in the t-channel at 8 TeV. The measurements are compared to a theoretical calculation based on NLO QCD computed assuming a top mass of 172.5 GeV. Status of figure: November 2017 (LHCtopWG meeting) png 69kB, pdf 15kB This and previous plot versions
Summary of ATLAS measurements of the single top production cross-sections in the t-channel as a function of the center of mass energy compared to a theoretical calculation based on NLO QCD. Status of figure: September 2018 (Top2018) png 157kB, pdf 16kB This and previous plot versions
Summary of the ATLAS and CMS extractions of the CKM matrix element Vtb from single top quark measurements. For each result, the contribution to the total uncertainty originating from the uncertainty on the theoretical prediction for the single top production cross-section is shown along with the uncertainty originating from the experimental measurement of the cross-section. Status of figure: May 2018 (LHCtopWG meeting) png 136kB, pdf 16kB This and previous plot versions
Cross-section measurements for the associated production of a top quark and a W boson performed by ATLAS and CMS, and combined result compared with the NLO+NNLL prediction (gray bands). The uncertainties in the theoretical prediction are represented by dark and light gray bands for renormalisation/factorisation scale and PDF (evaluated using MSTW2008), respectively. Status of figure: September 2018 (Top2018) png 65kB, pdf 14kB This and previous plot versions
Summary of measurements of the single top production cross-sections in the Wt-channel as a function of the center of mass energy compared to a theoretical calculation based on NLO QCD complemented with NNLL resummation. Status of figure: May 2017 png 50kB, pdf 14kB This and previous plot versions
Summary of measurements of the top-pair production cross-section at 13 TeV compared to the exact NNLO QCD calculation complemented with NNLL resummation (top++2.0) using four PDF sets. The theory bands represent uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation are quoted at m_top=172.5 GeV. Status of figure: September 2018 (Top2018) png 64kB, pdf 16kB This and previous plot versions
Top-pair cross-section measurements at 7 TeV by the ATLAS and CMS collaborations. The band shows the NNLO QCD calculation complemented with NNLL resummation (top++2.0) using four different PDF sets. The theory bands represent uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation is quoted at m_top=172.5 GeV. The upper part of the figure shows early LHC measurements and their combination. The lower part summarizes measurements performed after the LHC cross-section combination. Status of figure: November 2017 (LHCtopWG meeting) png 70kB, pdf 19kB This and previous plot versions
Top-pair cross-section measurements at 7 TeV by the ATLAS collaboration. The band shows the NNLO QCD calculation complemented with NNLL resummation (top++2.0 ). The theory band represents uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation is quoted at m_top=172.5 GeV. Status of figure: May 2017 png 164kB, pdf 15kB This and previous plot versions
Summary of measurements of the top-pair production cross-section at 8 TeV compared to the exact NNLO QCD calculation complemented with NNLL resummation (top++2.0) using four different PDF sets. The theory bands represent uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation are quoted at m_top=172.5 GeV. Status of figure: September 2018 (Top2018) png 69kB, pdf 16kB This and previous plot versions
Summary of measurements of the top-pair production cross-section on ATLAS at 8 TeV compared to the exact NNLO QCD calculation complemented with NNLL resummation (top++2.0 ). The theory band represents uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation are quoted at m_top=172.5 GeV. Status of figure: September 2018 (Top2018) png 55kB, pdf 13kB This and previous plot versions
Summary of measurements of the top-pair production cross-section at 8 TeV compared to the exact NNLO QCD calculation complemented with NNLL resummation (top++2.0 ). The theory band represents uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation are quoted at the current world average m_top=173.34 GeV. Status of figure: May 2015 (Top LHC WG 2015) png 167kB, pdf 6kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the invariant mass of the top-quark pair. The CMS and ATLAS results are compared to NNLO and NLO+NNLL calculations. The values for the top-quark mass (mtop), the renormalisation (muR) and factorisation (muF) scales, and the choice of the PDF set used in each calculation are provided. Both the CMS and ATLAS measurements are performed assuming a top-quark mass value of 172.5 GeV. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and the NLO+NNLL calculation to the NNLO calculation. Status of figure: November 2016 (LHCtopWG meeting) png 35kB, pdf 21kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the invariant mass of the top-quark pair. The CMS and ATLAS results are compared to predictions from the Powheg+Herwig6 and Powheg+Pythia8 MC generators. The MC samples are generated with the settings described in arXiv: 1511.04716. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and the Powheg+Pythia8 prediction to the Powheg +Herwig6 prediction. Status of figure: November 2016 (LHCtopWG meeting) png 34kB, pdf 21kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the invariant mass of the top-quark pair. The CMS and ATLAS results are compared to the NLO and NNLO calculations from arXiv:1606.03350. The values for the top-quark mass (mtop), the renormalisation (muR) and factorisation (muF) scales, and the choice of the PDF set used in each calculation are provided. Both the CMS and ATLAS measurements are performed assuming a top-quark mass value of 172.5 GeV. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and NLO calculation to the NNLO calculation. Status of figure: November 2016 (LHCtopWG meeting) png 35kB, pdf 21kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the invariant mass of the top-quark pair. The CMS and ATLAS results are compared to the NNLO calculation. The values for the top-quark mass (mtop), the renormalisation (muR) and factorisation (muF) scales, and the choice of the PDF set used in the calculation are provided. Both the CMS and ATLAS measurements are performed assuming a top-quark mass value of 172.5 GeV. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements to the NNLO calculation. Status of figure: November 2016 (LHCtopWG meeting) png 32kB, pdf 21kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the transverse momentum of the top quark. The CMS and ATLAS results are compared to NNLO and approximate NNLO calculations. The values for the top-quark mass (mtop), the renormalisation (muR) and factorisation (muF) scales, and the choice of the PDF set used in each calculation are provided. The variable mT is defined as the square root of the sum of the squares of top-quark mass and the transverse momentum of the top quark. Both the CMS and ATLAS measurements are performed assuming a top-quark mass value of 172.5 GeV. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and the approximate NNLO calculations to the full NNLO calculation. Status of figure: November 2016 (LHCtopWG meeting) png 50kB, pdf 22kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the transverse momentum of the top quark. The CMS and ATLAS results are compared to predictions from the Powheg+Herwig6 and Powheg+Pythia8 MC generators. The MC samples are generated with the settings described in arXiv:1511.04716. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and the Powheg+Pythia8 prediction to the Powheg +Herwig6 prediction. Status of figure: November 2016 (LHCtopWG meeting) png 45kB, pdf 21kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the transverse momentum of the top quark. The CMS and ATLAS results are compared to the NLO and NNLO calculations from arXiv:1606.03350. The values for the top-quark mass (mtop), the renormalisation (muR) and factorisation (muF) scales, and the choice of the PDF set used in each calculation are provided. The variable mT is defined as the square root of the sum of the squares of top-quark mass and the transverse momentum of the top quark. Both the CMS and ATLAS measurements are performed assuming a top-quark mass value of 172.5 GeV. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and the NLO calculation to the NNLO calculation. Status of figure: November 2016 (LHCtopWG meeting) png 36kB, pdf 22kB This and previous plot versions
ll phase-space normalised differential ttbar cross-section as a function of the transverse momentum of the top quark. The CMS and ATLAS results are compared to the NNLO calculation. The values for the top-quark mass (mtop), the renormalisation (muR) and factorisation (muF) scales, and the choice of the PDF set used in the calculation are provided. The variable mT is defined as the square root of the sum of the squares of top-quark mass and the transverse momentum of the top quark. Both the CMS and ATLAS measurements are performed assuming a top-quark mass value of 172.5 GeV. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements to the NNLO calculation. Status of figure: November 2016 (LHCtopWG meeting) png 34kB, pdf 21kB This and previous plot versions
Full phase-space normalised differential ttbar cross-section as a function of the transverse momentum of the top-quark pair. The CMS and ATLAS results are compared to predictions from the Powheg+Herwig6 and Powheg+Pythia8 MC generators. The MC samples are generated with the settings described in arXiv:1511.04716. The shaded bands show the total uncertainty on the data measurements in each bin. The lower panel shows the ratio of the data measurements and the Powheg+Pythia8 prediction to the Powheg +Herwig6 prediction. Status of figure: November 2016 (LHCtopWG meeting) png 35kB, pdf 21kB This and previous plot versions
Summary of LHC and Tevatron measurements of the top-pair production cross-section as a function of the centre-of-mass energy compared to the NNLO QCD calculation complemented with NNLL resummation (top++2.0). The theory band represents uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation are quoted at m_top=172.5 GeV. Measurements made at the same centre-of-mass energy are slightly offset for clarity. Status of figure: September 2018 (Top2018) png 40kB, pdf 21kB This and previous plot versions
Summary of ATLAS measurements of the top-pair production cross-section as a function of the centre-of-mass energy compared to the NNLO QCD calculation complemented with NNLL resummation (top++2.0 ). The theory band represents uncertainties due to renormalisation and factorisation scale, parton density functions and the strong coupling. The measurements and the theory calculation are quoted at m_top=172.5 GeV. Measurements made at the same centre-of-mass energy are slightly offset for clarity. Status of figure: May 2018 (LHCtopWG meeting) png 57kB This and previous plot versions
Summary of the W boson helicity fraction measurements from ATLAS and CMS compared to the theory predictions. The uncertainty on the theory predictions is shown by the width of the green band. Status of figure: Nov 2017 (LHCtopWG) png 147kB, pdf 16kB This and previous plot versions

ATLAS Collaboration, 2019