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Determination of the sign of the decay width difference in the $B_s$ systemстатья
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: 108
- Год издания: 2012
- Издательство: American Physical Society
- Местоположение издательства: United States
- DOI: 10.1103/PhysRevLett.108.241801
- Аннотация: The interference between the K+K- S-wave and P-wave amplitudes in B_s -> J/psi K+K- decays with the K+K- pairs in the region around the phi(1020) resonance is used to determine the variation of the difference of the strong phase between these amplitudes as a function of K+K- invariant mass. Combined with the results from our CP asymmetry measurements in B_s -> J/psi phi decays, we conclude that the B_s mass eigenstate that is almost CP =+1 is lighter and decays faster than the mass eigenstate that is almost CP =-1. This determines the sign of the decay width difference DeltaGamma_s == Gamma_L -Gamma_H to be positive. Our result also resolves the ambiguity in the past measurements of the CP violating phase phi_s to be close to zero rather than pi. These conclusions are in agreement with the Standard Model expectations.
- Добавил в систему: Образцов Владимир Федорович