Constraints on the Higgs boson width from offshell production and decay to Zboson pairs
Abstract
Constraints are presented on the total width of the recently discovered Higgs boson, Gamma[H], using its relative onshell and offshell 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 inverse femtobarns at a centreofmass energy sqrt(s) = 7 TeV and 19.7 inverse femtobarns at sqrt(s) = 8 TeV. A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Zboson pair production threshold leads to an upper limit on the Higgs boson width of Gamma[H] < 22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass.
 Publication:

arXiv eprints
 Pub Date:
 May 2014
 arXiv:
 arXiv:1405.3455
 Bibcode:
 2014arXiv1405.3455C
 Keywords:

 High Energy Physics  Experiment
 EPrint:
 Replaced with published version