Supergravity and the $b\to s,γ$ decay

Details Supergravity and the $b\to s,γ$ decay Supergravity and the $b\to s,γ$ decay

1995-09-26

arxiv.org/abs/hep-ph/9509394v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, latex+sprocl.sty (appended at the end), 4 figures uuencoded. Based on a talk given by B. de Carlos at the Internation

Scientific paper

We evaluate the branching ratio BR($b\rightarrow s,\gamma$) in the minimal supersymmetric standard model (MSSM), determining the corresponding phenomenological restrictions on two attractive supergravity scenarios, namely minimal supergravity and a class of models with a natural solution to the $\mu$ problem. We have included in the calculation some one--loop refinements that have a substantial impact on the results. It is stressed the fact that an eventual improvement of the experimental bounds of order $10^{-4}$ would strengthen the restrictions on the MSSM dramatically. This would be enough to discard these supergravity scenarios with $\mu<0$ if no discrepancy is found with the standard model prediction, while for $\mu>0$ there will remain low-energy windows.

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