Electromagnetic corrections to B — → V 0 semileptonic transitions

30th Annual Meeting of the Division of Particles and Fields (DPyC) of the Mexican Physical Society

Tostado, S.L.^1

Departamento de Fisica, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Apdo. Postal 14-740, México D.F.

07000, Mexico^1

关键词: Decay rate;    Electromagnetic radiative;    Precise determinations;    Quark mixing parameters;    Radiative corrections;    Real photon;    Resonance state;    Vector meson;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/761/1/012020/pdf
DOI  :  10.1088/1742-6596/761/1/012020

来源: IOP

【 摘 要 】

We evaluate the O(α) electromagnetic radiative corrections to the B-→ V0-v(V is a vector meson and= e, μ decay rates. Intermediate resonance states in the real- photon amplitude are considered in order to extend the region of validity of the soft-photon approximation. The virtual corrections are regularized by the cutoff scale Λ, which is used to match the long- and short-distance regimes. The radiative corrections to the integrated decay rate are presented and we discuss its impact in the precise determination of the b quark mixing parameters.