On the strong-CP problem in models with several Higgs multiplets and supersymmetry |
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Authors: | R Akhoury II Bigi |
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Institution: | Department of Physics, University of California, Los Angeles, CA 90024, USA;Department of Physics, UCLA, and Institut fur Theoret, Physik E, RWTH Aachen, D5100 Aachen, Federal Republic of Germany |
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Abstract: | We point out that the strong-CP problem becomes even more pressing in the context of weak models where CP violation originates in the Higgs sector. θ renormalization is numerically too large at the one-loop level and even divergent at the two-loop level. When supersymmetry (SUSY) is introduced, many more possible sources for CP violation open up. θ renormalization could stay finite in perturbation theory, however, we find that the one-loop result turns out to be too large by orders of magnitude unless SUSY fields like gauginos and higgsinos are highly degenerate in mass or SUSY breaking proceeds in a very special way, or a Peccei-Quinn symmetry holds leading to superlight axions. |
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