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

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

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[subscript H]<600  GeV. The analysis uses data corresponding to an integrated luminosity of...

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Bibliographic Details
Main Authors: Alver, Burak Han, Bendavid, Joshua L., Busza, Wit, Butz, Erik M., Cali, Ivan Amos, Chan, M., Dutta, Valentina, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Hahn, Kristian Allan, Kim, Y., Klute, Markus, Li, W., Ma, Teng, Nahn, Steven, Paus, Christoph M. E., Ralph, Duncan Kelley, Stephans, George S. F., Stoeckli, Fabian, Sung, Kevin Kai Hong, Velicanu, Dragos Alexandru, Wenger, Edward Allen, Wyslouch, Boleslaw, Xie, Si, Yilmaz, Yetkin, Zanetti, Marco, Wolf, Roger, Yang, Mingming, Yoon, A. S., Bauer, Gerry P, Lee, Yen-Jie, Luckey Jr, P David, Roland, Christof E, Roland, Gunther M, Rudolph, Matthew Scott, Sumorok, Konstanty C
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2012
Online Access:http://hdl.handle.net/1721.1/70505
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0001-6332-5839
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0002-0869-5631
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[subscript H]<600  GeV. The analysis uses data corresponding to an integrated luminosity of 4.7  fb[superscript -1] recorded by the CMS detector in pp collisions at √s=7  TeV from the LHC. Seventy-two events are observed with four-lepton invariant mass m[subscript 4ℓ]>100  GeV (with 13 below 160 GeV), 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 134–158 GeV, 180–305 GeV, and 340–465 GeV. Small excesses of events are observed around masses of 119, 126, and 320 GeV, making the observed limits weaker than expected in the absence of a signal.

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