Recent Developments in Bbar -> X_s gamma

Abstract

We present a concise review of the recent theoretical progress concerning the standard model calculation of the inclusive radiative Bbar -> X_s gamma decay. Particular attention is thereby devoted to the calculations of the next-to-next-to-leading order fixed-order O(alpha_s^2) contributions, non-local O(alpha_s Lambda/m_b) power corrections, and logarithmic-enhanced O(alpha_s^2) cut-effects to the decay rate. The current status of new physics calculations of the inclusive b -> s gamma mode is also briefly summarized.Comment: 7 pages, 2 figures, 1 table, based on invited talks given at the third meeting of the workshop ``Flavour in the era of the LHC'', CERN, Geneva, March 15--17, 2006 and at XLIInd Rencontres de Moriond, QCD and Hadronic Interactions, La Thuile, Italy, March 17--24, 2007, v2: minor modification