NNLL QCD contribution of the electromagnetic dipole operator to Γ ((B)over-bar → Xsγ)

We present an independent calculation of that part of the O(alpha(2)(s)) contribution to the decay width Gamma ((B) over bar -> X-s gamma) which arises from the self-interference term of the electromagnetic dipole operator O-7. Using a different method, we find complete agreement with a previous calculation. This NNLL contribution is an important ingredient for the complete NNLL prediction of Gamma((B) over bar -> X-s gamma) which will resolve the charm quark mass ambiguity appearing at NLL accuracy. (c) 2006 Published by Elsevier B.V.