Search for baryon number violation in top quark production and decay using proton-proton collisions at √s = 13 TeV

Belyaev, A.V.; Boos, E.; Bunichev, V.; Dubinin, M.; Dudko, L.; Gribushin, A.; Klyukhin, V.; Obraztsov, S.; Perfilov, M.; Petrushanko, S.V.; Savrin, V.; Volkov, P.; Vorotnikov, G.A.; CMS, C.

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Gribushin A., Klyukhin V., Obraztsov S., Perfilov M., Petrushanko S.V., Savrin V., Volkov P., Vorotnikov G.A., CMS Collaboration
Журнал: Physical Review Letters
Том: 132
Год издания: 2024
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 241802
DOI: 10.1103/PhysRevLett.132.241802
Аннотация: A search is presented for baryon number violating interactions in top quark production and decay. Theanalysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC with an integrated luminosity of 138 fb−1. Candidate events are selected by requiring two oppositely charged leptons (electrons or muons) and exactly one jet identified as originating from a bottom quark. Multivariate discriminants are used to separate the signal from the background. No significant deviation from the standard model prediction is observed. Upper limits are placed on the strength of baryon number violating couplings. For the first time the production of single top quarks via baryon number violating interactions is studied. This allows the search to set the most stringent constraints to date on the branching fraction of the top quark decay to a lepton, an up-type quark (u or c), and a down-type quark (d, s, or b). The results improve the previous bounds by 3 to 6 orders of magnitude based on the fermion flavor combination of the baryon number violating interactions.
Добавил в систему: Клюхин Вячеслав Иванович

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Search for baryon number violation in top quark production and decay using proton-proton collisions at √s = 13 TeVстатья Исследовательская статья

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