B_s -> γγdecay in the two Higgs doublet model with flavor changing neutral currents

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  • 26 March 1998
Abstract
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 --> \gamma\gamma) is promising.

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