Precision calculations in BR(anti-B --> Xs gamma)

Abstract

We briefly summarize the current status of perturbative calculations at next-to-next-to-leading-order (NNLO) accuracy in the \bar{B}\to X_s\gamma decay rate as well as that of non-perturbative power-corrections.

Comments: 7 pages, presented at FLAVIAnet Topical Workshop "Low energy constraints on extensions of the Standard Model", Kazimierz, Poland, 23-27 July 2009, reference added in section 3