Impact of New Trigger Menu on Higgs searches

A first look to the the impact of the new trigger menu on the different Higgs searches channels is reported blow. The analysis corresponding to green rows are unaffected by the new menu. Yellow rows corresponds to analyses where a very slight degradation is expected. Red rows are analyses that are strongly affected by the new trigger menu (these are mainly channels without isolated leptons where we relay on multijets, tau, missing Et).
We have launched a certain amount of trigger studies with a twofold goals:

Have a final quantitative estimate of the impact of the increased trigger thresholds (multijets, missing Et, tau, etc)
Verify if we can propose some more exclusive triggers, based on combinations of existing trigger objects (like lepton+n-jets, MissingEt+forward-jets, etc.) but with lower threshold, in order to recover some efficiency or to improve performance in some analyses (like vector boson fusion channels).

Of course we are still in favor of the inclusive trigger approach but it could be useful to propose some backup exclusive (low rate) triggers that could be in case (for example) the bkg would impose some increase in inclusive thresholds or just to improve the sensitivity of some HOT observed channels (2-sigma fluctuations).
A particular interesting subject is the Forward Jet trigger that is relevant for all the vector-boson-fusion channels. Most of the more exclusive trigger could be based on a combination of this trigger with other signature. It is important to pursue studies on this subject.
Most of these studies will probably be ready be the ATHENS physics workshop.

SM Channels

Channel	Relevant selection cuts	Relevant OLD trigger thresholds	Relevant NEW Trigger thresholds	Comment on impact of NEW trigger Menu	Other comments on the channel
H-> gg	Eg1>25 and Eg2>40	2g20i	2g20i	OK (lost some rodoundancy with g40i it is now g60i)
ttH (H->bb)	1 isolated lepton from top: Ee>20 GeV or Emu>20 GeV	e20i or mu20	e25i or mu20	~OK Reduction on Significance~2%	Valid for all ttH channels when trigger is based mainly isolated lepton from one top
H->ZZ*->4 leptons	Two isolated leptons with Pt>20 GeV	2e15i or 2mu6 or e15imu15i	2e15i or 2mu10i or e15imu10	OK
H->WW*-> lnulnu	2 leptons El1>20 GeV and El2>10 GeV	e20i or mu20 2e15i or 2mu6 e15imu6	e25i, mu20, 2e15i or 2mu10 or e15imu10	~OK Aproximate estimate: Significance<1%
H->WW->lnujj H->ZZ->nu nu ll H-mass>500 GeV	1 iso-lep Pt>100 2 iso-lep Pt>40 GeV			OK
ttH (H->WW)	1 iso-lep Pt>30 2 iso-lep Pt>20		e30i, mu20, 2e20i or 2mu10 or e15imu10	OK (cuts at threshold recover some sensitivity with more exclusive triggers like 2 leptons + 4 central jets, ..?)	High luminosity Measure Higgs couplings
ttH (H->tau tau)	Complex analysis: depending on top and tau decays	Leptonic triggers, tau tau+ETmiss, jet+ETmiss Multijets	Leptonic triggers, tau+ETmiss, jet+ETmiss	Under study E.Gross-L.Zivkovic Weizmann: for leptonic decays of the top loss on sensitivity negligible (few%)
qqH (H->tau tau)	Cuts fixed at lepton thresholds (at least 1 iso-lep from tau)		e25i, mu20, 2e15i or 2mu10 or e15imu10	OK Under study: B.Mellado et al- Wisconsin Results on lower lepton thresholds in: ATL-COM-014-2003
qqH (H->WW)	Cuts fixed at lepton thresholds (at least 1 iso-lep from W)		e25i, mu20, 2e15i or 2mu10 or e15imu10	OK Under study: B.Mellado et al. Wisconsin Results for lower lepton thresholds in: ATL-COM-014-2003
qqH (H->gg)	Same as iclusive channels	2g20i	2g20i	OK (lost some rodoundancy with g40i it is now g60i)
qqH (H->bb)	Four jets Pt cuts: 55,60,60,90 GeV	4J55	4J110	NOT OK trigger based on FJets Under study: Shuichi, Kanzaki,Asai	Important for coupling measurements

MSSM Channels

Channel	Relevant selection cuts	Relevant OLD trigger thresholds	Relevant NEW Trigger thresholds	Comment on impact of NEW trigger Menu	Other comments on the channel
H/A->tau tau (l nu had nu)	1 iso-lep Pt>24 GeV	e20i or mu20	e25i or mu20	~OK
H/A->tau tau (had nu had nu)	Analysis cuts fixed to have efficient trigger (OLD menue !)	tau+ETmiss 20+30 Jet+ETmiss 50+50 1J180,2J75,4J55	tau+ETmiss 35+45 Jet+ETmiss 70+70 1J400,3J165,4J110	~OK study by J.Thomas - Mainz Loss in effic.1-5%	Important for large masses
H/A -> mu mu	2 iso-mu Pt>20 GeV	2mu6 or mu10	2mu10 or mu20	OK
bbH (H->bb)	4 b-jets	1J180,2J75,4J55	1J400,3J165,4J110	NOT OK probably lost	A' la CDF
A->Zh	2 iso-lep Pt>20 GeV	mu20 e20i 2mu6 or 2ei15	e25i, mu20, 2e20i or 2mu10	OK
tt (t->H+b) H+->tau nu t->l nu b	1 iso-lep Pt>20	mu20 e20i	e25i mu20	~OK Reduction on Significance~2%	M(H+)+Mb<Mtop
tt (t->H+b) H+->tau nu tau -> had nu t->jjb	Cuts on tau, and ETmiss tau+ETmiss 25+45 Jet+ETmiss 60+60	tau+ETmiss 20+30 Jet+ETmiss 50+50	tau+ETmiss 35+45 Jet+ETmiss 70+70	Probably OK to be verified
bg->tH+ (H+->tb -> jjb) (t->l nu b)	1 iso-lep Pt>20	mu20 e20i	e25i mu20	~OK Reduction on Significance~2%	M(H+)>Mtop+Mb
bg->tH+ (H+->tau nu) (t->jjb)	Pt-tau>100 GeV	tau+ETmiss 20+30	tau60	OK
WH,ZH (W->l nu) (Z-> ll)	Cutes tuned to single or double iso-lep trigger thresholds		e25i, mu20, 2e15i or 2mu10 or e15imu10	OK to be checked for high luminosity: Indiana U-P.Gagnon	Invisible Higgs H-> cc
ttH (H->cc)	1 iso-lep Pt>20	mu20 e20i	e25i mu20	~OK Reduction on significance 30fb^-1 1.75->1.71 s Study by Royal Holloway-E.Brambilla	Invisible Higgs H-> cc
qqH (H->cc)	two Forward tagging jets		New FJ trigger	Under study B.DiGirolamo	Invisible Higgs H-> cc

Last update 9 April 2003 by E.Richter-Was and F.Cerutti