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Observation of B0s→D¯¯¯¯∗0ϕ and search for B0→D¯¯¯¯0ϕ decaysстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- 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: Physical Review D
- Том: 98
- Номер: 7
- Год издания: 2018
- Издательство: American Physical Society
- Местоположение издательства: United States
- DOI: 10.1103/physrevd.98.071103
- Аннотация: The first observation of the B0s→D¯¯¯¯∗0ϕ decay is reported, with a significance of more than seven standard deviations, from an analysis of pp collision data corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The branching fraction is measured relative to that of the topologically similar decay B0→D¯¯¯¯0π+π− and is found to be B(B0s→D¯¯¯¯∗0ϕ)=(3.7±0.5±0.3±0.2)×10−5, where the first uncertainty is statistical, the second systematic, and the third from the branching fraction of the B0→D¯¯¯¯0π+π− decay. The fraction of longitudinal polarisation in this decay is measured to be fL=(73±15±3)%. The most precise determination of the branching fraction for the B0s→D¯¯¯¯0ϕ decay is also obtained, B(B0s→D¯¯¯¯0ϕ)=(3.0±0.3±0.2±0.2)×10−5. An upper limit, B(B0→D¯¯¯¯0ϕ)<2.0 (2.2)×10−6 at 90% (95\%) confidence level is set. A constraint on the ω−ϕ mixing angle δ is set at |δ|<5.2∘(5.5∘) at 90% (95%) confidence level.
- Добавил в систему: Бережной Александр Викторович