Search for boosted Higgs boson decay to a charm quark-antiquark pair in proton-proton collisions at √s= 13 TeV

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Klyukhin V., Kodolova O., Obraztsov S., Perfilov M., Petrushanko S.V., Savrin V., CMS Collaboration
Журнал: Physical Review Letters
Том: 131
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 041801
DOI: 10.1103/PhysRevLett.131.041801
Аннотация: A search for the standard model (SM) Higgs boson (H) produced with transverse momentum (p_T ) greater than 450 GeV and decaying to a charm quark-antiquark (cc¯) pair is presented. The search is performed using proton-proton collision data collected at √s = 13 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb−1. Boosted H → cc¯ decay products are reconstructed as a single large-radius jet and identified using a deep neural network charm tagging technique. The method is validated by measuring the Z → cc¯ decay process, which is observed in association with jets at high p_T for the first time with a signal strength of 1.00+0.17-0.14 (syst)+-0.08(theo)+-0.06(stat), defined as the ratio of the observed process rate to the SM expectation. The observed (expected) upper limit on σ(H)B(H → cc¯) is set at 47 (39) times the SM prediction at 95% confidence level.
Добавил в систему: Клюхин Вячеслав Иванович

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