Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-06-27
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 3 figures, experimental value for b->d+gamma corrected, version accepted for publication in PRD
Scientific paper
We combine recent progress in measuring the branching ratio of the decay B->X_d gamma$ with the discovery that hadronic uncertainties in the CP-averaged branching ratio drop out to a large extent. Implications of these improvements on the size of possible new physics effects are investigated. We find the updated SM prediction for the CP-averaged branching ratio to be Br[B->X_d gamma]^SM_E_gamma>1.6 GeV = 1.54^+0.26-0.31*10^-5, which should be compared with the experimental value of Br[B->X_d gamma]^exp_E_gamma>1.6GeV = (1.41+-0.57) 10^-5. After performing a model independent analysis, we consider different new physics models: the MSSM with generic sources of flavor violation, the two Higgs doublet model of type III and a model with right-handed charged currents. It is found that the constraints on the SUSY parameters delta^d_13 have improved and that the absolute value of the right-handed quark mixing matrix element |V^R_td| must be smaller than 1.5*10^-4.
Crivellin Andreas
Mercolli Lorenzo
No associations
LandOfFree
B -> X_d gamma and constraints on new physics 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 B -> X_d gamma and constraints on new physics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and B -> X_d gamma and constraints on new physics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-40206