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Explicit CP Violation in the MSSM Through Higgs --> gamma.gamma

S. Moretti·S. Munir·P. Poulose
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Abstract

The MSSM with explicit CP violation is studied through the di-photon decay channel of the lightest neutral Higgs boson. Through the leading one-loop order H1 --> gammar.gamma is affected by a large number of Higgs-sparticle couplings, which could be complex. Our preliminary scan over the Supersymmetric parameter space shows that more than 50% average deviations are possible, in either direction, in the corresponding branching ratio, with respect to the case of the CP-conserving MSSM. In particular, our analysis shows that in the presence of a light stop (with mass ~ 200 GeV) a CP-violating phase Arg(mu) ~ 90(deg) can render the H1 --> gamma.gamma branching ratio more than 10 times larger, for suitable combinations of the other MSSM parameters.

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S. Moretti, S. Munir, P. Poulose. 2007-02-23. Explicit CP Violation in the MSSM Through Higgs --> gamma.gamma. https://doi.org/10.1016/j.physletb.2007.03.053

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