Light Cone 2021: Physics of Hadrons on the Light Front

Nonfactorizable contribution of charming loop to Bs→γγ decay

2 Dec 2021, 17:30

15m

Emerald Hall B (Jeju Booyoung Hotel)

Contributed talk Parallel Session

Speaker

Ilia Belov (M.V. Lomonosov Moscow State University)

Description

In this talk we discuss the nonfactorizable charm-loop effect in the rare FCNC decay $B_s\to \gamma \gamma$. The nonfactorizable contribution comes from the soft gluon emission from c-quark loop. The rigorous calculation requires the knowledge of three particle DA with three independent coordinates. We properly study the influence of three particle DA form on the amplitude by the case of $B_s\to {\gamma }^{\ast }{\gamma }^{\ast }$ decay. The numerical estimations are presented for $B_s\to \gamma \gamma$ decay branching.

Presentation materials

Nonfactorizable_charm.pdf