Patterns of flavor signals in supersymmetric models

Abstract

Quark and lepton flavor signals are studied in four supersymmetric models, namely, the minimal supergravity model, the minimal supersymmetric standard model with right-handed neutrinos, SU(5) supersymmetric grand unified theory with right-handed neutrinos, and the minimal supersymmetric standard model with U(2) flavor symmetry. We calculate $b\ensuremath{\rightarrow}s(d)$ transition observables in ${B}_{d}$ and ${B}_{s}$ decays, taking the constraint from the ${B}_{s}\ensuremath{-}{\overline{B}}_{s}$ mixing recently observed at the Tevatron into account. We also calculate lepton flavor violating processes $\ensuremath{\mu}\ensuremath{\rightarrow}e\ensuremath{\gamma}$, $\ensuremath{\tau}\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\gamma}$, and $\ensuremath{\tau}\ensuremath{\rightarrow}e\ensuremath{\gamma}$ for the models with right-handed neutrinos. We investigate possibilities to distinguish the flavor structure of the supersymmetry breaking sector with use of patterns of various flavor signals which are expected to be measured in experiments such as MEG, LHCb, and a future Super $B$ factory.