Measurement of the dependence of the hadron production fraction ratio f_s/f_u on B meson kinematic variables in proton-proton collisions at √s = 13 TeV

Авторы: Belyaev A.V., Boos E., Dubinin M., Dudko L., Ershov A.A., Gribushin A., Klyukhin V., Kodolova O., Obraztsov S., Petrushanko S.V., Savrin V., Snigirev A., CMS Collaboration
Журнал: Physical Review Letters
Том: 131
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 121901
DOI: 10.1103/PhysRevLett.131.121901
Аннотация: The dependence of the ratio between the B_s^0 and B+ hadron production fractions, f_s/f_u, on thetransverse momentum (p_T) and rapidity of the B mesons is studied using the decay channels B_0^s → J/ψϕ and B+ → J/ψK+. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6 fb−1. The f_s/f_u ratio is observed to depend on the B p_T and to be consistent with becoming asymptotically constant at large p_T . No rapidity dependence is observed. The ratio of the B0 to B+ meson production fractions, fd/fu, is also measured, for the first time in proton-proton collisions, using the B0 → J/ψK*0 decay channel. The result is found to be within 1 standard deviation of unity and independent of p_T and rapidity, as expected from isospin invariance.
Добавил в систему: Клюхин Вячеслав Иванович

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА