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

Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
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, ΓHΓH, 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−15.1 fb−1 at a center-of-mass energy View the MathML sources=7 TeV and 19.7 fb−119.7 fb−1 at View the MathML sources=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<22 MeVΓH<22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of mH=125.6 GeVmH=125.6 GeV.
0370-2693
64-85
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Khachatryan, Vardan and Belyaev, Alexander (2014) Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs. Physics Letters B, B736, 64-85. (doi:10.1016/j.physletb.2014.06.077).

Record type: Article

Abstract

Constraints are presented on the total width of the recently discovered Higgs boson, ΓHΓH, 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−15.1 fb−1 at a center-of-mass energy View the MathML sources=7 TeV and 19.7 fb−119.7 fb−1 at View the MathML sources=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<22 MeVΓH<22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of mH=125.6 GeVmH=125.6 GeV.

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Published date: 2014
Organisations: Physics & Astronomy

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Local EPrints ID: 410192
URI: http://eprints.soton.ac.uk/id/eprint/410192
ISSN: 0370-2693
PURE UUID: 62788c4f-c37c-4806-9afb-21922cfa3e93
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 06 Jun 2017 04:02
Last modified: 10 Nov 2021 03:19

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Author: Vardan Khachatryan

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