Baryogenesis in a parity solution to the strong CP problem (in EN)
Abstract
Space-time parity can solve the strong CP problem and introduces a spontaneously broken SU(2)Rgauge symmetry. We investigate the possibility of baryogenesis from a first-order SU(2)Rphase transition similar to electroweak baryogenesis. We consider a model with the minimal Higgs content, for which the strong CP problem is indeed solved without introducing extra symmetry beyond parity. Although the parity symmetry seems to forbid the SU(2)Ranomaly of theB−Lsymmetry, the structure of the fermion masses can allow for the SU(2)Rsphaleron process to produce non-zeroB−Lasymmetry of Standard Model particles so that the wash out by the SU(2)Lsphaleron process is avoided. The setup predicts a new hyper-charged fermion whose mass is correlated with the SU(2)Rsymmetry breaking scale and hence with the SU(2)Rgauge boson mass, and depending on the origin of CP violation, with an electron electric dipole moment. In a setup where CP violation and the first-order phase transition are assisted by a singlet scalar field, the singlet can be searched for at future colliders.
- Research Organization:
- Rutgers Univ., Piscataway, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0010008
- OSTI ID:
- 2576166
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 11 Vol. 2023; ISSN 1029-8479
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- EN
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