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

Loïc Quertenmont
2016 Nuclear and Particle Physics Proceedings  
We present the constraints set by the CMS collaboration 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. 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 centre-of-mass energy √ s = 7 TeV and 19.7 fb −1 at √ s = 8 TeV. An upper limit on the Higgs boson width of Γ H < 22 MeV at a 95%
more » ... fidence level was set using the ZZ → 4 and 2l2ν final states. This bound corresponds to 5.4 times the expected value in the standard model at the measured mass of m H = 125.6 GeV.
doi:10.1016/j.nuclphysbps.2015.09.118 fatcat:yjvvzjxkazb2jcyfe5ar66puba