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 √s=13  TeV, are described. When combined with previous VH measurements using data collected at √s=7, 8, and 13 TeV, an excess of events is observed at mH=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→b¯b 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.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2018). Observation of Higgs Boson Decay to Bottom Quarks. PHYSICAL REVIEW LETTERS, 121(12), 1-20 [10.1103/PhysRevLett.121.121801].

Observation of Higgs Boson Decay to Bottom Quarks

Benaglia, A.;Beschi, A.;Brivio, F.;Ciriolo, V.;Dinardo, M.  E.;Fiorendi, S.;Ghezzi, A.;Govoni, P.;Malberti, M.;Monti, F.;Moroni, L.;Paganoni, M.;Ragazzi, S.;Tabarelli de Fatis, T.;Zuolo, D.;Massironi, A.;Gerosa, R.;Lucchini, M.  T.;De Guio, F.;
2018

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 √s=13  TeV, are described. When combined with previous VH measurements using data collected at √s=7, 8, and 13 TeV, an excess of events is observed at mH=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→b¯b 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.
Articolo in rivista - Articolo scientifico
Physics - LHC - CMS - Higgs boson
English
2018
121
12
1
20
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2018). Observation of Higgs Boson Decay to Bottom Quarks. PHYSICAL REVIEW LETTERS, 121(12), 1-20 [10.1103/PhysRevLett.121.121801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/206097
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