Simultaneous probe of the charm and bottom quark Yukawa couplings using $t\bar{t}H$ events

A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H $\to$$\mathrm{c\bar{c}}$, produced in association with a top quark-antiquark pair ($\mathrm{t\bar{t}}$H) is presented. The search is performed with data from proton-proton collisions at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. Advanced machine learning techniques are employed for jet flavor identification and event classification. The Higgs boson decay to a bottom quark-antiquark pair is measured simultaneously and the observed $\mathrm{t\bar{t}}$H bb event rate relative to the standard model expectation is 0.91$\pm^{+0.26}_{-0.22}$. The observed (expected) upper limit on the product of production cross section and branching fraction $σ$($\mathrm{t\bar{t}}$H)$\mathcal{B}$(H $\to$$\mathrm{c\bar{c}}$) is 0.11 (0.13$\pm^{+0.06}_{-0.04}$) pb at 95% confidence level, corresponding to 7.8 (8.7$\pm^{+4.0}_{-2.6}$) times the standard model prediction. When combined with the previous search for H $\to$ $\mathrm{c\bar{c}}$ via associated production with a W or Z boson, the observed (expected) 95% confidence interval on the Higgs-charm Yukawa coupling modifier, $κ_\mathrm{c}$, is $\lvert{κ_\mathrm{c}}\rvert$ $\lt$ 3.5 (2.7), the most stringent constraint to date.

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arXiv (Cornell University)
Published
2025-01-01
DOI
https://doi.org/10.3204/pubdb-2025-04632
Primary Topic
Superconducting Materials and Applications
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article
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article

Simultaneous probe of the charm and bottom quark Yukawa couplings using $t\bar{t}H$ events

T. Reis, S. Polikarpov, A. Vilela Pereira, A. Vagnerini et al.
arXiv (Cornell University)
Superconducting Materials and Applications
article

Simultaneous probe of the charm and bottom quark Yukawa couplings using $t\bar{t}H$ events

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article en

Abstract

A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H $\to$$\mathrm{c\bar{c}}$, produced in association with a top quark-antiquark pair ($\mathrm{t\bar{t}}$H) is presented. The search is performed with data from proton-proton collisions at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. Advanced machine learning techniques are employed for jet flavor identification and event classification. The Higgs boson decay to a bottom quark-antiquark pair is measured simultaneously and the observed $\mathrm{t\bar{t}}$H bb event rate relative to the standard model expectation is 0.91$\pm^{+0.26}_{-0.22}$. The observed (expected) upper limit on the product of production cross section and branching fraction $σ$($\mathrm{t\bar{t}}$H)$\mathcal{B}$(H $\to$$\mathrm{c\bar{c}}$) is 0.11 (0.13$\pm^{+0.06}_{-0.04}$) pb at 95% confidence level, corresponding to 7.8 (8.7$\pm^{+4.0}_{-2.6}$) times the standard model prediction. When combined with the previous search for H $\to$ $\mathrm{c\bar{c}}$ via associated production with a W or Z boson, the observed (expected) 95% confidence interval on the Higgs-charm Yukawa coupling modifier, $κ_\mathrm{c}$, is $\lvert{κ_\mathrm{c}}\rvert$ $\lt$ 3.5 (2.7), the most stringent constraint to date.

arXiv (Cornell University)
Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université de Haute-Alsace (FR), Deutsches Elektronen-Synchrotron DESY (DE), Institut Pluridisciplinaire Hubert Curien (FR), CEA Paris-Saclay (FR), Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (FR), Institute of Nuclear Physics of Lyon (FR), Laboratoire Leprince-Ringuet (FR), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Institut de Physique des 2 Infinis de Lyon (FR), RWTH Aachen University (DE)
Openalex Percentile: Top 73%
Superconducting Materials and Applications
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