Endpoint divergences in inclusive $\bar{B}\to X_s\gamma$

Abstract

The subleading so-called resolved contributions represent the largest uncertainty in the inclusive decay mode $\bar{B}\to X_s\gamma$. However there had been no complete proof of factorization of these subleading contributions. This failure of factorisation can be traced back to endpoint divergences and cured by recently proposed refactorisation techniques.

Comments: Based on talks given by R.S. at SCET 2023, Berkeley, March 2023 and by T.H. at FPCP 2023, Lyon, May 2023