An analysis of the production of a Higgs boson (H) in association with a top quark-antiquark pair (t ̄tH) or a single top quark (tH) is presented. The Higgs boson decay into a bottom quark-antiquark pair (H → bb ̄) is targeted, and three different final states of the top quark decays are considered, defined by the number of leptons (electrons or muons) in the event. The analysis utilises proton-proton collision data collected at the CERN LHC √ with the CMS experiment at s = 13 TeV in 2016–2018, which correspond to an integrated luminosity of 138fb−1. The observed t ̄tH production rate relative to the standard model expectation is 0.33 ± 0.26 = 0.33 ± 0.17(stat) ± 0.21(syst). Additionally, the t ̄tH production rate is determined in intervals of Higgs boson transverse momentum. An upper limit at 95% confidence level is set on the tH production rate of 14.6 times the standard model prediction, with an expectation of 19.3+9.2. Finally, constraints are derived on the strength −6.0 and structure of the coupling between the Higgs boson and the top quark from simultaneous extraction of the t ̄tH and tH production rates, and the results are combined with those obtained in other Higgs boson decay channels.
Measurement of the $$ \textrm{t}\overline{\textrm{t}}\textrm{H} $$ and tH production rates in the H → $$ \textrm{b}\overline{\textrm{b}} $$ decay channel using proton-proton collision data at $$ \sqrt{s} $$ = 13 TeV
Alexe, C.;Bruschini, D.;
2025
Abstract
An analysis of the production of a Higgs boson (H) in association with a top quark-antiquark pair (t ̄tH) or a single top quark (tH) is presented. The Higgs boson decay into a bottom quark-antiquark pair (H → bb ̄) is targeted, and three different final states of the top quark decays are considered, defined by the number of leptons (electrons or muons) in the event. The analysis utilises proton-proton collision data collected at the CERN LHC √ with the CMS experiment at s = 13 TeV in 2016–2018, which correspond to an integrated luminosity of 138fb−1. The observed t ̄tH production rate relative to the standard model expectation is 0.33 ± 0.26 = 0.33 ± 0.17(stat) ± 0.21(syst). Additionally, the t ̄tH production rate is determined in intervals of Higgs boson transverse momentum. An upper limit at 95% confidence level is set on the tH production rate of 14.6 times the standard model prediction, with an expectation of 19.3+9.2. Finally, constraints are derived on the strength −6.0 and structure of the coupling between the Higgs boson and the top quark from simultaneous extraction of the t ̄tH and tH production rates, and the results are combined with those obtained in other Higgs boson decay channels.| File | Dimensione | Formato | |
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JHEP02(2025)097.pdf
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