Nonrestoration of spontaneously broken P, CP and PQ at high temperature

Details Nonrestoration of spontaneously broken P, CP and PQ at high temperature Nonrestoration of spontaneously broken P, CP and PQ at high temperature

1996-01-30

arxiv.org/abs/hep-ph/9601376v2

Phys.Rev. D54 (1996) 7857-7866

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 3 figures, uses psfig. Replaced version with the Latex source

Scientific paper

10.1103/PhysRevD.54.7857

The possibility of P and CP violation at high temperature in models where these symmetries are spontaneously broken is investigated. It is found that in minimal models that include singlet fields, high T nonrestoration is possible for a wide range of parameters of the theory, in particular in models of CP violation with a CP-odd Higgs field. The same holds true for the invisible axion version of the Peccei-Quinn mechanism. This can provide both a way out for the domain wall problem in these theories and the CP violation required for baryogenesis. In the case of spontaneous P violation it turns out that high T nonrestoration requires going beyond the minimal model.The results are shown to hold true when next-to-leading order effects are considered.

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