$BR(\bar{B}\to X_s\gamma )$: First Next-to-Next-to-Leading Order Results

Abstract

In this contribution the first next-to-next-to-leading order corrections to the branching ratio $BR(\bar{B}\to X_s\gamma )$ are discussed. This includes the completion of the matching part and the fermionic corrections to the most important operator matrix elements.

Comments: 5 pages, ps figures included, contribution to the Proceedings of the International Conference and Loops and Legs in Quantum Field Theory 2004, Germany, 25-30 April 2004