Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
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1-s2.0-S0370269314004821-main.pdf
Size
1.1 MB
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Author(s)
CMS Collaboration
Apyan, Aram
Barbieri, Richard Alexander
Bauer, Gerry P
Busza, Wit
Cali, Ivan Amos
Di Matteo, Leonardo
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
July 2014
Journal
Physics Letters B
Publisher
Elsevier
Citation
Khachatryan, V. et al. “Constraints on the Higgs Boson Width from Off-Shell Production and Decay to Z-Boson Pairs.” Physics Letters B 736 (September 2014): 64–85 © 2014 Elsevier B.V.
Version
Final published version
Abstract
Constraints 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 5.1 fb ⁻¹ at a center-of-mass energy √s = 7 TeV and 19.7 fb ⁻¹ at √s = 8 TeV. 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Attribution 4.0 International (CC BY 4.0)
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.PHYSLETB.2014.06.077
