Sphalerons and CP-violation
- Centre for Theoretical Physics, University of Sussex, Bringhton BN1 9QJ (United Kingdom)
We report here on the effect that CP-violation from a two Higgs doublet potential has on the sphaleron, a field configuration which mediates baryon and lepton number violation in electroweak theories. We parametrized the Higgs potential in terms of physical Higgs masses and mixing angles, one of which is CP-violating. From considering boundedness of potential we were able to derive the allowed range of the CP-violating mixing angle for given Higgs masses. We found the sphaleron and its barrier in the pure SU(2) theory in the presence of CP-violation by extending the usual spherically symmetric ansatz. From the sphaleron solution we used the method of gradient flow to find the static minimum energy path between vacua of the theory with different Chern-Simons number. We determined the sphaleron energy as a function of CP-violating mixing angle and showed that it can increase by 10-20%.
- OSTI ID:
- 21208134
- Journal Information:
- AIP Conference Proceedings, Vol. 478, Issue 1; Conference: COSMO-98: 2. international workshop on particle physics and the early universe, Asilomar, CA (United States), 15-20 Nov 1998; Other Information: DOI: 10.1063/1.59399; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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