Search for the standard model Higgs boson in the decay channel H→ZZ→4l in pp collisions at √s=7TeV

Search for the standard model Higgs boson in the decay channel H→ZZ→4l in pp collisions at √s=7TeV

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A search for a Higgs boson in the four-lepton decay channel H→ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range of 110<m -1="" 4-="" 4.7fb="" 600gev.="" an="" analys...

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Bibliographic Details
Main Authors: Chatrchyan, S, Khachatryan, V, Sirunyan, A, Tumasyan, A, Adam, W, Bergauer, T, Dragicevic, M, Erö, J, Fabjan, C, Friedl, M, Frühwirth, R, Ghete, V, Hammer, J, Hoch, M, Hörmann, N, Hrubec, J, Jeitler, M, Kiesenhofer, W, Krammer, M, Liko, D, Mikulec, I, Pernicka, M, Rahbaran, B, Rohringer, C
Format: Journal article
Published: 2012
Description
Summary:A search for a Higgs boson in the four-lepton decay channel H→ZZ, with each Z boson decaying to an electron or muon pair, is reported. The search covers Higgs boson mass hypotheses in the range of 110<m -1="" 4-="" 4.7fb="" 600gev.="" an="" analysis="" are="" at="" by="" cms="" collisions="" corresponding="" data="" detector="" events="" four-lepton="" from="" h<="" in="" integrated="" invariant="" lhc.="" luminosity="" m="" mass="" observed="" of="" pp="" recorded="" seventy-two="" the="" to="" uses="" with="" √s="7TeV">100GeV (with 13 below 160GeV), while 67.1±6.0 (9.5±1.3) events are expected from background. The four-lepton mass distribution is consistent with the expectation of standard model background production of ZZ pairs. Upper limits at 95% confidence level exclude the standard model Higgs boson in the ranges of 134-158GeV, 180-305GeV, and 340-465GeV. Small excesses of events are observed around masses of 119, 126, and 320GeV, making the observed limits weaker than expected in the absence of a signal. © 2012 CERN.</m>

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