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Evidence for the Higgs boson decay to a bottom quark–antiquark pair

Evidence for the Higgs boson decay to a bottom quark–antiquark pair
Evidence for the Higgs boson decay to a bottom quark–antiquark pair
A search for the standard model (SM) Higgs boson (H) decaying to bb‾ when produced in association with an electroweak vector boson is reported for the following processes: Z(νν)H, W(μν)H, W(eν)H, Z(μμ)H, and Z(ee)H. The search is performed in data samples corresponding to an integrated luminosity of 35.9fb−1 at s=13TeV recorded by the CMS experiment at the LHC during Run 2 in 2016. An excess of events is observed in data compared to the expectation in the absence of a H→bb‾ signal. The significance of this excess is 3.3 standard deviations, where the expectation from SM Higgs boson production is 2.8. The signal strength corresponding to this excess, relative to that of the SM Higgs boson production, is 1.2±0.4. When combined with the Run 1 measurement of the same processes, the signal significance is 3.8 standard deviations with 3.8 expected. The corresponding signal strength, relative to that of the SM Higgs boson, is 1.06−0.29+0.31.
0370-2693
501-532
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, A. , The CMS Collaboration (2018) Evidence for the Higgs boson decay to a bottom quark–antiquark pair. Physics Letters B, 780, 501-532. (doi:10.1016/j.physletb.2018.02.050).

Record type: Article

Abstract

A search for the standard model (SM) Higgs boson (H) decaying to bb‾ when produced in association with an electroweak vector boson is reported for the following processes: Z(νν)H, W(μν)H, W(eν)H, Z(μμ)H, and Z(ee)H. The search is performed in data samples corresponding to an integrated luminosity of 35.9fb−1 at s=13TeV recorded by the CMS experiment at the LHC during Run 2 in 2016. An excess of events is observed in data compared to the expectation in the absence of a H→bb‾ signal. The significance of this excess is 3.3 standard deviations, where the expectation from SM Higgs boson production is 2.8. The signal strength corresponding to this excess, relative to that of the SM Higgs boson production, is 1.2±0.4. When combined with the Run 1 measurement of the same processes, the signal significance is 3.8 standard deviations with 3.8 expected. The corresponding signal strength, relative to that of the SM Higgs boson, is 1.06−0.29+0.31.

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Accepted/In Press date: 20 February 2018
e-pub ahead of print date: 27 February 2018
Published date: 10 May 2018

Identifiers

Local EPrints ID: 419602
URI: https://eprints.soton.ac.uk/id/eprint/419602
ISSN: 0370-2693
PURE UUID: cc86e7ce-f5a5-4b48-8b70-ec1f1eb6aa2a
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 16 Apr 2018 16:30
Last modified: 15 Mar 2019 01:33

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