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arXiv · 0706.4269

Exploring the Di-Photon Decay of a Light Higgs Boson in the MSSM With Explicit CP Violation

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

The di-photon decay channel of the lightest Higgs boson is considerd as a probe to explore CP violation in the Minimal Supersymmetric Standard Model (MSSM). The scalar/pseudo-scalar mixing is considered along with CP violation entering through the Higgs-sfermion-sfermion couplings, with and without light sparticles. The impact of a light stop on the decay width and Branching Ratio (BR) is established through a detailed study of the amplitude of the process H1 --> gamma.gamma. The other sparticles have little influence even when they are light. With a suitable combination of other MSSM parameters, a light stop can change the BR by more than 50 % with a CP-violating phase phi_mu ~ 90 deg., while the change is almost nil with a heavy stop.

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S. Hesselbach, S. Moretti, S. Munir, P. Poulose. 2007-12-07. Exploring the Di-Photon Decay of a Light Higgs Boson in the MSSM With Explicit CP Violation. https://doi.org/10.1140/epjc%2Fs10052-007-0503-4

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