The Effect of Supersymmetric Particles on b -> s γDecay in Supergravity Models

الأصل · EN

The effect of loops involving charginos with up-type squarks, and gluinos with down-type squarks, on the inclusive decay mode b→ sγ is studied in the context of minimal N=1 Supergravity models with a radiatively broken electroweak symmetry group. It is confirmed that the strong constraints imposed by the CLEO upper bound B(b→ sγ)<5.4× 10⁻⁴ on two-Higgs doublets models are much weaker in supersymmetric theories due to partial cancelations from loops involving charginos and up-type squarks. The dependence of the branching ratio and the supersymmetry masses on the top quark mass is explored.