Search for charged-lepton flavor violation in the production and decay of top quarks using trilepton final states in 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.; Snigirev, A.; Volkov, P.; 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., Snigirev A., Volkov P., CMS Collaboration
Журнал: Physical Review D
Том: 111
Номер: 1
Год издания: 2025
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 012009
DOI: 10.1103/PhysRevD.111.012009
Аннотация: A search is performed for charged-lepton flavor violating processes in top quark (t) productionand decay. The data were collected by the CMS experiment from proton-proton collisions at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 138 fb^−1. The selected events are required to contain one opposite-sign electron-muon pair, a third charged lepton (electron or muon), and at least one jet of which no more than one is associated with a bottom quark. Boosted decision trees are used to distinguish signal from background, exploiting differences in the kinematics of the final states particles. The data are consistent with the standard model expectation. Upper limits at 95% confidence level are placed in the context of effective field theory on the Wilson coefficients, which range between 0.024–0.424 TeV^−2 depending on the flavor of the associated light quark and the Lorentz structure of the interaction. These limits are converted to upper limits on branching fractions involving up (charm) quarks, t → eμu (t → eμc), of 0.032(0.498) × 10^−6, 0.022(0.369) × 10^−6, and 0.012(0.216) × 10^−6 for tensorlike, vectorlike, and scalarlike interactions, respectively.
Добавил в систему: Клюхин Вячеслав Иванович

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

ИСТИНА ИНХС РАН

Search for charged-lepton flavor violation in the production and decay of top quarks using trilepton final states in proton-proton collisions at √s =13 TeVстатья Исследовательская статья

Прикрепленные файлы