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Dalitz plot analysis of $B^0 \to øverlineD^0 π^+π^-$ decaysстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 октября 2015 г.
- Авторы: LHCb Collaboration, Бережной А.В., Лефлат А.К., Никитин Н.В., Саврина Д.В., Королев М.Г.
- Журнал: Physical Review D
- Том: 92
- Номер: 3
- Год издания: 2015
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 032002
- DOI: 10.1103/PhysRevD.92.032002
- Аннотация: The resonant substructures of B0→D¯¯¯0π+π− decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0→D¯¯¯0π+π− decay in the region m(D¯¯¯0π±)>2.1GeV/c2 is measured to be (8.46±0.14±0.29±0.40)×10−4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalisation channel B0→D∗(2010)−π+. The π+π− S-wave components are modelled with the Isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(D¯¯¯0π−)≈2.8GeV/c2 is confirmed and its spin-parity is determined for the first time as JP=3−. The branching fraction, mass and width of this structure are determined together with those of the D∗0(2400)− and D∗2(2460)− resonances. The branching fractions of other B0→D¯¯¯0h0 decay components with h0→π+π− are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0→D¯¯¯0f0(500), B0→D¯¯¯0f0(980), B0→D¯¯¯0ρ(1450), B0→D∗3(2760)−π+ and the first evidence of B0→D¯¯¯0f0(2020) are presented.
- Добавил в систему: Бережной Александр Викторович