NNLO QCD corrections to B -> Xs gamma
Abstract
Current status of the NNLO QCD corrections to B -> Xs gamma is reviewed. The calculations include three-loop matching conditions, four-loop anomalous dimensions as well as two- and three-loop on-shell amplitudes. Certain parts of the three-loop matrix elements are found by interpolation in the charm quark mass between the large-beta0 approximation in the mc=0 case and the complete result in the mc >> mb/2 case.
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