CP violation in charged higgs bosons decays H± → W± (γ, Z) in the Minimal Supersymmetric Standard Model (MSSM)

One loop mediated charged Higgs bosons decays if H-+/- -> (WV)-V-+/-, V = Z, gamma are studied in the Minimal Supersymmetric Standard Model (MSSM) with and without CP violating phases. We evaluate the MSSM contributions to these processes taking into account B -> X-s gamma constraint as well as experimental constraints on the MSSM parameters. In the MSSM, we found that in the intermediate range of tan beta less than or similar to 10 and for large A(t) and large mu, where the lightest top squark becomes very light and hence non-decoupled, the branching ratio of H-+/- -> (WV)-V-+/- can be of the order 10(-3) while the branching ratio of H-+/- -> W-+/-gamma is of the order 10(-5). We found also that the CP violating phases of soft SUSY parameters can modify the branching ratio by about one order of magnitude. We also show that MSSM with CP violating phases lead to CP-violating asymmetry in the decays H+-> W+V and H- -> W-V. Such CP asymmetry can be rather large and can reach 80% in some region of parameter space.