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arXiv · hep-ph/9703239

Phenomenological implications of moduli-dominant SUSY breaking

Yoshiharu Kawamura·Shaaban Khalil·Tatsuo Kobayashi
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Abstract

We study moduli-dominated SUSY breaking within the framework of string models. This type of SUSY breaking in general leads to non-universal soft masses, i.e. soft scalar masses and gaugino masses. Further gauginos are lighter than sfermions. This non-universality has phenomenologically important implications. We investigate radiative electroweak symmetry breaking in the mass spectrum derived from moduli-dominated SUSY breaking, where the lightest chargino and neutralino are almost gauginos. Moreover, constraints from the branching ratio of $b \to s γ$ and the relic abundance of the LSP are also considered. The mass spectrum of moduli-dominated SUSY breaking is favorable to the experimental bound of the $b \to s γ$ decay decreasing its branching ratio. We obtain an upper bound for the gravitino mass from the cosmological constraint.

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Yoshiharu Kawamura, Shaaban Khalil, Tatsuo Kobayashi. 1997-07-14. Phenomenological implications of moduli-dominant SUSY breaking. https://doi.org/10.1016/s0550-3213(97)00460-4

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