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Motivated by the recent measurement of the like-sign dimuon charge asymmetry,we investigate anomalous CP violation in the B_s- bar{B}_s mixing within thesupersymmetry. We show that when gluino diagrams dominate supersymmetrycontributions, it is very difficult to realize a large B_s- bar{B}_s mixingphase under the constraint from electric dipole moments barring cancellations.This constraint can be ameliorated by supposing superparticles decoupled. Inthis limit, we find that it is possible to achieve the large CP asymmetry, andthe branching ratio of B_s -> mu^+ mu^- tends to become sizable.

Large CP Violation in B_s Meson Mixing with EDM constraint in Supersymmetry