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

Constraints are presented on the total width of the recently discovered Higgs boson, Γ H, 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. Our 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. Finally, 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 Γ H<22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of m H=125.6 GeV.
  1. Yerevan Physics Inst. (YerPhI) (Armenia). et al.
Publication Date:
Report Number(s):
FERMILAB-PUB-14-155-CMS; CMS-HIG-14-002; CERN-PH-EP-2014-078
Journal ID: ISSN 0370-2693; arXiv eprint number arXiv:1405.3455; TRN: US1600978
Grant/Contract Number:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 736; Journal ID: ISSN 0370-2693
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS Collaboration
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CMS; physics; Higgs; diboson; properties
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1234831