First observation of B+→D+sK+K− decays and a search for B+→D+sϕ decays

Авторы: Бережной А.В., Горелов И.В., Лефлат А.К., Никитин Н.В., Саврина Д.В., Волков В.Ю., Жуков В.Ю., LHCb Collaboration
Журнал: Journal of High Energy Physics
Том: 2018
Номер: 1
Год издания: 2018
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
DOI: 10.1007/jhep01(2018)131
Аннотация: A search for B+→D+sK+K− decays is performed using pp collision data corresponding to an integrated luminosity of 4.8 fb−1, collected at centre-of-mass energies of 7, 8 and 13TeV with the LHCb experiment. A significant signal is observed for the first time and the branching fraction is determined to be B(B+→D+sK+K−)=(7.1±0.5±0.6±0.7)×10−6, where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode B+→D+sD¯¯¯0. A search is also performed for the pure annihilation decay B+→D+sϕ. No significant signal is observed and a limit of B(B+→D+sϕ)<4.9×10−7(4.2×10−7) is set on the branching fraction at 95% (90% ) confidence level.
Добавил в систему: Бережной Александр Викторович

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

ИСТИНА