Supersymmetric b→ sγ with large chargino contributions
Abstract
Supersymmetric (SUSY) theories are often thought to give large branching ratios for b→ sγ from charged Higgs loops. We show that in many cases chargino loop contributions can cancel those of the Higgs, and SUSY can give B( b→ sγ) at or below the Standard Model prediction. We show this occurs because the large stop mass splittings usually found in SUSY break a GIM mechanism suppression. These effects are strongly enhanced by large tan β, so that B( b→ sγ) is very sensitive to the value of tan β, contrary to what has been claimed. We also note that the supergravity relation B0= A0-1 is somewhat disfavored over the general case.
- Publication:
-
Physics Letters B
- Pub Date:
- October 1993
- DOI:
- 10.1016/0370-2693(93)91627-Y
- arXiv:
- arXiv:hep-ph/9307301
- Bibcode:
- 1993PhLB..315..372G
- Keywords:
-
- High Energy Physics - Phenomenology
- E-Print:
- TRI-PP-93-66. 12pp (Plain LATEX)+4 fig not incl. PostScript file of figs available (~3MB), contact Corrie Kost KOST@TRIUMF.CA. Request hardcopy or FAX of figures through GARISTO@TRIUMF.CA