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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 Journal Article uri icon

Overview

abstract

  • Abstract; ; An analysis of the production of a Higgs boson (H) in association with a top quark-antiquark pair (; ; $$ textrm{t}overline{textrm{t}}textrm{H} $$; ; t; ; t; ¯; ; H; ; ; ) or a single top quark (tH) is presented. The Higgs boson decay into a bottom quark-antiquark pair (H → ; ; $$ textrm{b}overline{textrm{b}} $$; ; b; ; b; ¯; ; ; ; ) 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 ; ; $$ sqrt{s} $$; ; ; s; ; ; ; = 13 TeV in 2016–2018, which correspond to an integrated luminosity of 138 fb; −1. The observed ; ; $$ textrm{t}overline{textrm{t}}textrm{H} $$; ; t; ; t; ¯; ; H; ; ; production rate relative to the standard model expectation is 0.33 ± 0.26 = 0.33 ± 0.17(stat) ± 0.21(syst). Additionally, the ; ; $$ textrm{t}overline{textrm{t}}textrm{H} $$; ; t; ; t; ¯; ; H; ; ; 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 ; ; $$ {19.3}_{-6.0}^{+9.2} $$; ; ; 19.3; ; −; 6.0; ; ; +; 9.2; ; ; ; ; . 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 ; ; $$ textrm{t}overline{textrm{t}}textrm{H} $$; ; t; ; t; ¯; ; H; ; ; and tH production rates, and the results are combined with those obtained in other Higgs boson decay channels.

publication date

  • February 14, 2025

Date in CU Experts

  • March 4, 2025 5:39 AM

Full Author List

  • Hayrapetyan A; Tumasyan A; Adam W; Andrejkovic JW; Bergauer T; Chatterjee S; Damanakis K; Dragicevic M; Hussain PS; Jeitler M

author count

  • 2384

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1029-8479

Additional Document Info

volume

  • 2025

issue

  • 2

number

  • 97