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Title

Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs

AuthorsChatrchyan, S.; Brochero Cifuentes, J. A. ; Cabrillo, I. J. ; Calderon, Alicia ; Duarte Campderros, J. ; Fernández, M. ; Gómez, G. ; Graziano, A. ; Jorda, C. ; López Virto, A. ; Marco, Jesús ; Marco, Rafael ; Martínez-Rivero, Celso ; Matorras, Francisco ; Muñoz Sánchez, F. J. ; Piedra, Jonatan ; Rodrigo, Teresa ; Rodríguez Marrero, Ana Y. ; Ruiz Jimeno, Alberto ; Scodellaro, Luca ; Vila, Iván ; Vilar, Rocío ; CMS Collaboration
Issue Date2014
PublisherElsevier
CitationPhysics Letters B 736: 64-85 (2014)
AbstractConstraints are presented on the total width of the recently discovered Higgs boson, ΓH, using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012, corresponding to integrated luminosities of 5.1fb -1 at a center-of-mass energy s=7TeV and 19.7fb -1 at s=8TeV. A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of ΓH < 22MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of mH = 125.6GeV. © 2014 Elsevier B.V.
DescriptionOpen Access Under a Creative Commons license.-- et al.
Publisher version (URL)http://dx.doi.org/10.1016/j.physletb.2014.06.077
URIhttp://hdl.handle.net/10261/110447
DOI10.1016/j.physletb.2014.06.077
Identifiersdoi: 10.1016/j.physletb.2014.06.077
issn: 0370-2693
Appears in Collections:(IFCA) Artículos
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