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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/52120
Title: Search for the Standard Model Higgs Boson in the Decay Channel H→ZZ→4l in pp Collisions at √s=7  TeV
Authors: Chatrchyan, S.; Brochero Cifuentes, J. A.; Cabrillo, I. J.; Calderón-Urrea, Alejandro; Chuang, S. H.; Duarte Campderros, J.; Felcini, M.; Fernández, M.; Gómez, G.; González Sánchez, J.; Jorda, C.; Lobelle Pardo, P.; López Virto, A.; Marco, Jesús; Marco, Rafael; Martínez-Rivero, Celso; Matorras, Francisco; Muñoz Sánchez, F. J.; Rodrigo, Teresa; Rodriguez Marrero, Ana Y.; Ruiz Jimeno, Alberto; Scodellaro, Luca; Sobron Sañudo, M.; Vila, Iván; Vilar, Rocío; CMS Collaboration
Issue Date: 2012
Publisher: American Physical Society
Citation: Physical Review Letters 108(11): 111804 (2012)
Abstract: 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 H< 600GeV. The analysis uses data corresponding to an integrated luminosity of 4.7fb -1 recorded by the CMS detector in pp collisions at √s=7TeV from the LHC. Seventy-two events are observed with four-lepton invariant mass m 4->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.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.108.111804
URI: http://hdl.handle.net/10261/52120
Identifiers: doi: 10.1103/PhysRevLett.108.111804
issn: 0031-9007
e-issn: 1079-7114
DOI: 10.1103/PhysRevLett.108.111804
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