1995/02/28 by Bhaskar Dutta, B. Dutta, E. Keith
Physics and Astronomy · #Black Holes and Theoretical Physics #Computer science #Grand Unified Theory #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #SO(10) #Scale (ratio) #Supersymmetry #Theoretical physics #Unification #hep-ph
paper · pdf · doi:10.1103/physrevd.52.6336
published as Phys.Rev. D52 (1995) 6336-6341 · Title changed, final version as accepted for PRD, 12 pages, 6 Figures (Figs.2-6 included, uuencoded, epsf.tex)
arxiv created 1995/10/30 · openalex publication_date 1995/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Although calculations of the b\ensuremath→s\ensuremathγ 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 \ensuremathμ>0 and tan\ensuremathβ 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 W-ino and Higgsino--W-ino mediated decays. The neutralino-mediated contribution is found to be enhanced, but nevertheless it remains relatively insignificant.