Электронный каталог

Статья

Hayrapetyan, A.
Measurement of the tt^-H and tH Production Rates in the H *> bb^- Decay Channel Using Proton-Proton Collision Data at *%s=13 TeV / A.Hayrapetyan, S.Afanasiev, V.Alexakhin, D.Budkouski, I.Golutvin, I.Gorbunov, V.Karjavine, V.Korenkov, N.Krasnikov, A.Lanev, A.Malakhov, V.Matveev, V.Palichik, V.Perelygin, M.Savina, V.Shalaev, S.Shmatov, S.Shulha, V.Smirnov, O.Teryaev, N.Voytishin, B.S.Yuldashev, A.Zarubin, I.Zhizhin, Z.Tsamalaidze, S.Polikarpov, [CMS Collab.]. – Text : electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 2. – P. 097. – URL: https://doi.org/10.1007/JHEP02(2025)097. – Bibliogr.: 113.

An analysis of the production of a Higgs boson (H) in association with a top quark-antiquark pair (tt^-H) or a single top quark (tH) is presented. The Higgs boson decay into a bottom quark-antiquark pair (H → bb^¯) is targeted, and three diferent fnal states of the top quark decays are considered, defned 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 138 fb*−*1 . The observed tt^-H 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% confdence level is set on the tH production rate of 14.6 times the standard model prediction, with an expectation of 19.3&sup(+9.2)&sub(−6.0) . Finally, constraints are derived on the strength and structure of the coupling between the Higgs boson and the top quark from simultaneous extraction of the tt^-H and tH production rates, and the results are combined with those obtained in other Higgs boson decay channels



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами