in supersymmetric grand unified theories
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We investigate the recent CDF measurement of the Br(B s + -) which shows excess over the Standard Model. We consider minimal supergravity motivated models (mSUGRA)/CMSSM and grand unified models, SU(5) and SO(10). In the grand unified models, the neutrino mixings provide an additional source of squark flavor violation through the quark-lepton unification. In the context of minimal SU(5) model, we find that the new CDF measurement has imposed a lower bound on the branching ratio of for a large CP phase in the Bs-Bs mixing. Recall that there have been indication for a large CP phase in B s mixing from B sJ/ (Tevatron and LHCb) and dimuon asymmetry (D0). We also predict Br() for the possible range of values of Br(). 2011 Elsevier B.V.
author list (cited authors)
Dutta, B., Mimura, Y., & Santoso, Y.