Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-06-27
JHEP 0808:030,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
40 pages, 10 figures. Comments added. Version to appear in JHEP
Scientific paper
10.1088/1126-6708/2008/08/030
We study the pair-production of charginos in the CP-violating Minimal Supersymmetric Standard Model at center-of-mass energies around the heavy neutral Higgs boson resonances. If these resonances are nearly degenerate, as it can happen in the Higgs decoupling limit, radiatively induced scalar-pseudoscalar transitions can be strongly enhanced. The resulting mixing in the Higgs sector leads to large CP-violating effects, and a change of their mass spectrum. For longitudinally polarized muon beams, we analyze CP asymmetries which are sensitive to the interference of the two heavy neutral Higgs bosons. We present a detailed numerical analysis of the cross sections, chargino branching ratios, and the CP observables. We obtain sizable CP-asymmetries, which would be accessible in future measurements at a muon collider. Especially for intermediate values of the parameter \tan\beta, where the largest branching ratios of Higgs bosons into charginos are expected, this process allows to analyze the Higgs sector properties and its interaction to supersymmetric fermions.
der Pahlen Federico von
Kittel Olaf
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