Search for physics beyond the standard model in top quark production with additional leptons in the context of effective field theory

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

Авторы: Belyaev A.V., Boos E., Bunichev V., Dubinin M., Dudko L., Ershov A.A., Gribushin A., Klyukhin V., Obraztsov S., Perfilov M., Savrin V., Snigirev A., Volkov P., CMS Collaboration
Журнал: Journal of High Energy Physics
Том: 2023
Номер: 12
Год издания: 2023
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 068
DOI: 10.1007/JHEP12(2023)068
Аннотация: A search for new physics in top quark production with additional final-state leptons is performed using data collected by the CMS experiment in proton-proton collisions at √s = 13 TeV at the LHC during 2016–2018. The data set corresponds to an integrated luminosity of 138 fb−1. Using the framework of effective field theory (EFT), potential new physics effects are parametrized in terms of 26 dimension-six EFT operators. The impacts of EFT operators are incorporated through the event-level reweighting of Monte Carlo simulations, which allows for detector-level predictions. The events are divided into several categories based on lepton multiplicity, total lepton charge, jet multiplicity, and b-tagged jet multiplicity. Kinematic variables corresponding to the transverse momentum (p_T) of the leading pair of leptons and/or jets as well as the p_T of on-shell Z bosons are used to extract the 95% confidence intervals of the 26 Wilson coefficients corresponding to these EFT operators. No significant deviation with respect to the standard model prediction is found.
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Search for physics beyond the standard model in top quark production with additional leptons in the context of effective field theoryстатья Исследовательская статья

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