### Abstract

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.

Original language | English (US) |
---|---|

Pages (from-to) | 7857-7866 |

Number of pages | 10 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 54 |

Issue number | 12 |

State | Published - Dec 15 1996 |

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### ASJC Scopus subject areas

- Mathematical Physics
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)

### Cite this

*Physical Review D - Particles, Fields, Gravitation and Cosmology*,

*54*(12), 7857-7866.

**Nonrestoration of spontaneously broken P and CP at high temperature.** / Dvali, Gia; Melfo, Alejandra; Senjanović, Goran.

Research output: Contribution to journal › Article

*Physical Review D - Particles, Fields, Gravitation and Cosmology*, vol. 54, no. 12, pp. 7857-7866.

}

TY - JOUR

T1 - Nonrestoration of spontaneously broken P and CP at high temperature

AU - Dvali, Gia

AU - Melfo, Alejandra

AU - Senjanović, Goran

PY - 1996/12/15

Y1 - 1996/12/15

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0000147169&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000147169&partnerID=8YFLogxK

M3 - Article

VL - 54

SP - 7857

EP - 7866

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 12

ER -