$B_{s} \to \gamma \gamma$ decay in the two Higgs doublet model with flavor changing neutral currents

We calculate the leading logarithmic QCD corrections to the decay B_s ->\gamma\gamma in the two Higgs doublet model with tree level flavor changing currents (model III) including O_7 type long distance effects. Further, we analyse the dependencies of the branching ratio Br(B_s -> \gamma\gamma) and the ratio of CP-even and CP-odd amplitude squares, R=|A^+|^2/|A^-|^2, on the charged Higgs mass m_H and the selected model III parameters \xi^{U,D} including the leading logarithmic QCD corrections. It is found that to look for charged Higgs effects, the measurement of the branching ratio Br(B_s --