Determining the sign of the b -> s gamma amplitude

Gambino, Paolo; Haisch, Ulrich; Misiak, Mikolaj

Determining the sign of the b -> s gamma amplitude

Authors

Gambino, Paolo

Haisch, Ulrich

Misiak, Mikolaj

Description

The latest Belle and BaBar measurements of the inclusive B -> X_s l^+ l^- branching ratio have smaller errors and lower central values than the previous ones. We point out that these results indicate that the sign of the b -> s gamma amplitude is the same as in the SM. This underscores the importance of B -> X_s l^+ l^- in searches for new physics, and may be relevant for neutralino dark matter analyses within the MSSM.
Journal version, references added, minor modifications. 4 pages, 2 figures