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Simultaneous Probe of the Charm and Bottom Quark Yukawa Couplings Using tt¯H Eventsстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Gribushin A., Klyukhin V., Kodolova O., Petrushanko S., Savrin V., Snigirev A., CMS Collaboration
- Журнал: Physical Review Letters
- Том: 136
- Номер: 1
- Год издания: 2026
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 011801
- DOI: 10.1103/8lw4-6lyk
- Аннотация: A search for the standard model Higgs boson decaying to a charm quark-antiquark pair, H → cc¯, produced in association with a top quark-antiquark pair (tt¯H) is presented. The search is performed with data from proton-proton collisions at √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 tt¯H(H → bb¯) event rate relative to the standard model expectation is 0.91+0.26−0.22 . The observed (expected) upper limit on the product of production cross section and branching fraction σ(tt¯H)B(H → cc¯) is 0.11 (0.13) pb at 95% confidence level, corresponding to 7.8 (8.7) times the standard model prediction. When combined with the previous search for H → cc¯ via associated production with a W or Z boson, the observed (expected) 95% confidence interval on the Higgs-charm Yukawa coupling modifier, κ_c, is |κ_c| < 3.5 (2.7), the most stringent constraint to date.
- Добавил в систему: Клюхин Вячеслав Иванович
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