Resonant CP Violation in Higgs Production, Mixing and Decay

Details Resonant CP Violation in Higgs Production, Mixing and Decay Resonant CP Violation in Higgs Production, Mixing and Decay

1997-04-04

arxiv.org/abs/hep-ph/9704227v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, PS file, talk given at the Ringberg Workshop on ``The Higgs puzzle - What can we learn from LEP2, LHC, NLC, and FMC?

Scientific paper

CP violation induced by resonant transitions of a scalar to a pseudoscalar intermediate state is analyzed within a gauge-invariant resummation approach based on the pinch technique. Necessary conditions governing the resonant enhancement of CP violation in transition amplitudes are derived. The results of this study are then applied to describe the indirect mixing of a CP-even Higgs scalar, $H$, with a CP-odd Higgs particle, $A$, in two-Higgs doublet models. CP violation through $HA$ mixing in high-energy $pp$, $e^+e^-$ and $\mu^+\mu^-$ scatterings are estimated to be fairly large for a natural choice of kinematic parameters. Low-energy constraints originating from experimental upper bounds on the neutron electric dipole model are implemented in this analysis.

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