2001/05/29 by Mikolaj Misiak, Misiak, Mikolaj
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0105312
Contribution to the proceedings of the XXXVIth Rencontres de Moriond, Les Arcs, March 2001. 4 pages, 2 figures, uses epsfig
arxiv created 2001/05/29 · arxiv updated 2009/11/30
The experimental and theoretical status of the inclusive decay B -> Xs gamma is briefly summarized. Results from a very recent theoretical analysis are reported. An ~11% increase in the SM prediction for BR[ B -> Xs gamma] is found after replacing mcpole/mbpole by mc(mu)/mb1S in the NLO QCD correction. The well-known enhancement of the branching ratio by QCD logarithms is identified as an effect of mb-evolution in the top-quark contribution to the amplitude. This observation helps controlling the residual scale-dependence. The present prediction for the "total" branching ratio differs by 1.4 sigma from the experimental world average.