Аннотация
Use of semi-leptonic decays has become standard in constraining the Unitarity
Triangle. Bearing in mind that precise calculations of these are very
challenging, we propose an entirely new approach. In particular the |Vcb| +
epsilon\_K constraint, which depends extremely sensitively on Vcb in the
traditional method, is replaced by the interplay between epsilon\_K, BR(B ->tau
nu) and Delta M\_Bs. It is found that even in this method tensions with the
Standard Model persist at the 2 sigma level. Furthermore, improvements on the B
-> tau nu branching ratio and on the lattice determination of f\_Bs Bs^(1/2) can
increase the effectiveness of this method significantly.
Пользователи данного ресурса
Пожалуйста,
войдите в систему, чтобы принять участие в дискуссии (добавить собственные рецензию, или комментарий)