B_s mixing phase and lepton flavor violation in supersymmetric SU(5)

The connection between B_s mixing phase and lepton flavor violation is studied in a supersymmetric SU(5) theory, in the light of the latest measurements thereof. The (1) phase, preferring a non-vanishing squark mixing, generically implies r→ (e + μ) γ and μ → eγ. In addition to the facts already well-known, stresses are put on the role of gaugino to scalar mass ratio at the GUT scale and the possible modifications due to Planck-suppressed non-renormalizable operators.