Search for CP violation using tt¯ events in the lepton+jets channel in pp collisions at √s = 13 TeV

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Gribushin A., Klyukhin V., Korneeva N., Obraztsov S., Perﬁlov M., Savrin V., Volkov P., CMS Collaboration
Журнал: Journal of High Energy Physics
Том: 2023
Номер: 6
Год издания: 2023
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 81
DOI: 10.1007/jhep06(2023)081
Аннотация: Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at √s = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1. Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04 ± 0.10 (stat) ± 0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.
Добавил в систему: Клюхин Вячеслав Иванович

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