Constraining supersymmetric models from Bd - B-bard mixing and the Bd --> J/psi KS asymmetry
Abstract
We analyze the chargino contributions to Bd - B-bard mixing and CP asymmetry of the Bd --> J/psi KS decay, in the framework of the mass insertion approximation. We derive model independent bounds on the relevant mass insertions. Moreover, we study these contributions in supersymmetric models with minimal flavor violation, Hermitian flavor structure, and small CP violating phases and universal strength Yukawa couplings. We show that in supersymmetric models with large flavor mixing, the observed values of sin(2 beta) may be entirely due to the chargino-up-squark loops.
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