Light Stop and the $b\rightarrow sγ$ Process

Details Light Stop and the $b\rightarrow sγ$ Process Light Stop and the $b\rightarrow sγ$ Process

1993-07-12

arxiv.org/abs/hep-ph/9307249v1

Phys.Lett. B315 (1993) 119-123

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 4 figures (not included), KEK-TH-365, KEK preprint 93-68

Scientific paper

10.1016/0370-2693(93)90167-G

A constraint from $b\rightarrow s\gamma$ process to the minimal supersymmetric standard model is derived in the light stop region where the coupling between the lighter stop and the $Z^0$ boson vanishes due to the left-right mixing of the stop states. It is pointed out that although some region in the parameter space is excluded from this process there remains a large parameter space where the amplitude of the $b\rightarrow s\gamma$ is suppressed due to partial cancellation between different diagrams. Stop as light as 20 GeV is still viable from the $b\rightarrow s\gamma$ constraint.

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