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Observation of the B^0_s -> D^*+D^*- decayстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Бережной А.В., Горелов И.В., Данилина А.В., Козачук А.Д., Лефлат А.К., Никитин Н.В., Саврина Д.В., Соломин А.Н., Волков В.Ю., Жуков В.Ю., Королев М.Г., LHCb Collaboration
- Журнал: Journal of High Energy Physics
- Том: 7
- Год издания: 2023
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 119
- DOI: 10.1007/JHEP07(2023)119
- Аннотация: The first observation of the B0s→D∗+D∗− decay and the measurement of its branching ratio relative to the B0→D∗+D∗− decay are presented. The data sample used corresponds to an integrated luminosity of 9fb−1 of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13TeV between 2011 and 2018. The decay is observed with more than 10 standard deviations and the time-integrated ratio of branching fractions is determined to beB(B0s→D∗+D∗−)B(B0→D∗+D∗−)=0.269±0.032±0.011±0.008,where the first uncertainty is statistical, the second systematic and the third due to the uncertainty of the fragmentation fraction ratio fs/fd. The B0s→D∗+D∗− branching fraction is calculated to beB(B0s→D∗+D∗−)=(2.15±0.26±0.09±0.06±0.16)×10−4,where the fourth uncertainty is due to the B0→D∗+D∗−branching fraction. These results are calculated using the average B0s meson lifetime in simulation. Correction factors are reported for scenarios where either a purely heavy or a purely light B0s eigenstate is considered.
- Добавил в систему: Бережной Александр Викторович