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Search for the Standard Model Higgs Boson in the Decay Channel H→ZZ→4l in pp Collisions at √s=7  TeV

AutorChatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia; Chuang, S. H. ; Duarte Campderros, J. ; Felcini, Marta ; 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 ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Sobron Sañudo, M. ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Fecha de publicación2012
EditorAmerican Physical Society
CitaciónPhysical Review Letters 108(11): 111804 (2012)
ResumenA 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.
Versión del editorhttp://dx.doi.org/10.1103/PhysRevLett.108.111804
URIhttp://hdl.handle.net/10261/52120
DOI10.1103/PhysRevLett.108.111804
Identificadoresdoi: 10.1103/PhysRevLett.108.111804
issn: 0031-9007
e-issn: 1079-7114
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