Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physics Letters B Year : 2014

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

V. Khachatryan
  • Function : Author
P. Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier
S. Viret

Abstract

Constraints are presented on the total width of the recently discovered Higgs boson, Gamma[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. 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 centre-of-mass 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 Z-boson 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.

Dates and versions

in2p3-00991252 , version 1 (15-05-2014)

Identifiers

Cite

V. Khachatryan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs. Physics Letters B, 2014, 736, pp.64. ⟨10.1016/j.physletb.2014.06.077⟩. ⟨in2p3-00991252⟩
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