Effects of supersymmetric grand unification scale physics on {Gamma}({ital b}{r_arrow}{ital s}{gamma})
- Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (United States)
- Department of Physics, University of California, Riverside, California 92521 (United States)
Although calculations of the {ital b}{r_arrow}{ital s}{gamma} rate in supersymmetric grand unified models have always either ignored the gluino-mediated contribution or found it to be negligible, we show that taking universal supersymmetry-breaking masses at the Planck scale, rather than at the gauge unification scale, as is customary, leads to the gluino contribution being more significant and in fact sometimes even larger than the chargino-mediated contributions when {mu}{gt}0 and tan{beta} is of order 1. The impact is felt greatest when the gluinos are relatively light. Taking the universal boundary condition at the Planck scale also has an effect on the chargino contribution by increasing the effect of the {ital W}-ino and Higgsino--{ital W}-ino mediated decays. The neutralino-mediated contribution is found to be enhanced, but nevertheless it remains relatively insignificant.
- Research Organization:
- University of California
- DOE Contract Number:
- FG03-94ER40837; FG02-94ER40852
- OSTI ID:
- 132987
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 52; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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