Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-14
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 1 figure, uses ltwol2e.sty (included); to appear in the Proceedings of the 29th International Conference on High Ener
Scientific paper
We review the theoretical understanding of the branching ratio and photon-energy spectrum in B -> Xs gamma decays at next-to-leading order in QCD, including consistently the effects of Fermi motion. For the Standard Model, we obtain B(B -> Xs gamma)=(3.29 +- 0.33)*10^{-4} for the total branching ratio, and B(B -> Xs gamma)=(2.85+0.34-0.40)*10^{-4} if a cut E_gamma > 2.1 GeV is applied on the photon energy, as done in the recent CLEO analysis. A precise measurement of the photon spectrum would help reducing the theoretical uncertainty and yield important information on the momentum distribution of b quarks inside B mesons.
No associations
LandOfFree
Theoretical Status of B -> Xs gamma Decays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Theoretical Status of B -> Xs gamma Decays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical Status of B -> Xs gamma Decays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-724811