Radiative B Decay in the SM
Abstract
Description
The experimental and theoretical status of the inclusive decay B -> X_s gamma is briefly summarized. Results from a very recent theoretical analysis are reported. An ~11% increase in the SM prediction for BR[ B -> X_s gamma] is found after replacing m_c^pole/m_b^pole by m_c(mu)/m_b^1S in the NLO QCD correction. The well-known enhancement of the branching ratio by QCD logarithms is identified as an effect of m_b-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.
Contribution to the proceedings of the XXXVIth Rencontres de Moriond, Les Arcs, March 2001. 4 pages, 2 figures, uses epsfig
Contribution to the proceedings of the XXXVIth Rencontres de Moriond, Les Arcs, March 2001. 4 pages, 2 figures, uses epsfig