The b -> s gamma decay in supergravity with radiatively electroweak breaking

Abstract

It is analyzed the branching ratio $B(b\to s\gamma )$ in the context of minimal $N=1$ supergravity with radiatively broken electroweak symmetry group. There is a strong dependence on supersymetric parameters, but constraints on the charged Higgs mass in non-supersymmetric models are relaxed, due to large contribution from the chargino/up-type squark sector that interacts destructively with the Standard Model and the charged Higgs contributions. Large suppressions/enhancements of the branching fraction are found for large values of $\tan \beta$.

Comments: 10 pages (plain tex), figures not included, VAND-TH-93-13