Observation of Higgs Boson Decay to Bottom Quarks



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Eroe, J, Del Valle, A Escalante
et al (show 2247 more authors) (2018) Observation of Higgs Boson Decay to Bottom Quarks. PHYSICAL REVIEW LETTERS, 121 (12). 121801-.

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Abstract

The observation of the standard model (SM) Higgs boson decay to a pair of bottom quarks is presented. The main contribution to this result is from processes in which Higgs bosons are produced in association with a W or Z boson (VH), and are searched for in final states including 0, 1, or 2 charged leptons and two identified bottom quark jets. The results from the measurement of these processes in a data sample recorded by the CMS experiment in 2017, comprising 41.3  fb^{-1} of proton-proton collisions at sqrt[s]=13  TeV, are described. When combined with previous VH measurements using data collected at sqrt[s]=7, 8, and 13 TeV, an excess of events is observed at m_{H}=125  GeV with a significance of 4.8 standard deviations, where the expectation for the SM Higgs boson is 4.9. The corresponding measured signal strength is 1.01±0.22. The combination of this result with searches by the CMS experiment for H→bb[over ¯] in other production processes yields an observed (expected) significance of 5.6 (5.5) standard deviations and a signal strength of 1.04±0.20.

Item Type: Article
Uncontrolled Keywords: CMS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 12 Oct 2018 10:03
Last Modified: 19 Jan 2023 01:14
DOI: 10.1103/PhysRevLett.121.121801
Open Access URL: https://arxiv.org/pdf/1808.08238
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3027450