B(s)-B(s)bar Mixing in Supersymmetric Grand Unified Models
Abstract
We study Bs-Bs mixing in grand unified SO(10), SU(5) models where the mixings among the second and third generation squarks arise due to the existence of flavor violating sources in the Dirac and Majorana couplings which are responsible for neutrino mixings. We find that when the branching ratio of tau->mu gamma decay is enhanced to be around the current experimental bound, Bs-Bs mixing may also contain large contribution from supersymmetry in the SO(10) boundary condition. Consequently, the phase of Bs-Bs mixing is large (especially for small tan beta and large scalar mass m0) and can be tested by measuring CP asymmetries of Bs decay modes.
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