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First observation of the decay $B_{s2}^*(5840)^0 \to B^{*+} K^-$ and studies of excited $B^0_s$ mesonsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: LHCb Collaboration (R A.(., Образцов В.Ф.
- Журнал: Physical Review Letters
- Том: 110
- Номер: 151803
- Год издания: 2013
- Издательство: American Physical Society
- Местоположение издательства: United States
- DOI: 10.1103/PhysRevLett.110.151803
- Аннотация: The properties of the orbitally excited (L=1) Bs0 states are studied by using 1.0 fb-1 of pp collisions at s=7 TeV collected with the LHCb detector. The first observation of the Bs2*(5840)0 meson decaying to B*+K- is reported, and the corresponding branching fraction measured relative to the B+K- decay mode. The Bs1(5830)0→B*+K- decay is observed as well. The width of the Bs2*(5840)0 state is measured for the first time, and the masses of the two states are determined with the highest precision to date. The observation of the Bs2*(5840)0→B*+K- decay favors the spin-parity assignment JP=2+ for the Bs2*(5840)0 meson. In addition, the most precise measurement of the mass difference m(B*+)-m(B+)=45.01±0.30(stat)±0.23(syst) MeV/c2 is obtained.
- Добавил в систему: Образцов Владимир Федорович