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

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

2007-02-23

arxiv.org/abs/hep-ph/0702242v1

Phys.Lett.B649:206-211,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 Pages. RevTex4

Scientific paper

10.1016/j.physletb.2007.03.053

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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