CP Violation in B_s Mixing in the SUSY SU(5) GUT with Right-handed Neutrinos

Abstract

It is recently announced by the {\bf Ut}{\it fit} collaboration that the CP phase of the $B_s$ mixing amplitude, ${\varphi }_{B_s}$, deviates more than $3\sigma$ from the standard-model prediction. In this paper we discuss how large correction to ${\varphi }_{B_s}$ is possible in the supersymmetric SU(5) ground unified model (SUSY SU(5) GUT) with right-handed neutrinos. Here, we assume the supergravity-like boundary condition for the SUSY-breaking terms. We found that the 95% probability region derived by the {\bf Ut}{\it fit} collaboration is marginal in this model.

arXiv comment13 pages, 13 figures, version to appear in PLB

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