Dynamics of two-Higgs-doublet {ital CP} violation and baryogenesis at the electroweak phase transition

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.2451· OSTI ID:286845

Cline, J M ^[1]; Kainulainen, K ^[2]; Vischer, A P ^[3]

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1. McGill University, Montreal, PQ H3A 2T8 (Canada)
2. CERN, CH-1211, Geneve 23 (Switzerland)
3. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

We quantitatively study the charge transport mechanism of electroweak baryogenesis in a realistic two-Higgs-doublet model, comparing the contributions from quarks and leptons reflecting from electroweak domain walls, and comparing the exact profile of the {ital CP}-violating phase with a commonly used ansatz. We note that the phenomenon of spontaneous {ital CP} violation at high temperature can occur in this model, even when there is no {ital CP} violation at zero temperature. We include all known effects which are likely to influence the baryon production rate, including strong sphalerons, the nontrivial dispersion relations of the quasiparticles in the plasma, and Debye screening of gauged charges. We confirm the claim of Joyce, Prokopec, and Turok that the reflection of {tau} leptons from the wall gives the dominant effect. We conclude that this mechanism is at best marginally capable of producing the observed baryon asymmetry of the universe, and we discuss some ways in which it might be enhanced. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: University of Minnesota
• DOE Contract Number: AC02-83ER40105; FG02-87ER40328
• OSTI ID: 286845
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 4 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ASYMMETRY
BARYON ASYMMETRY
BARYONS
CHARGES
CP INVARIANCE
DOMAIN WALLS
DYNAMICS
HIGGS BOSONS
HIGGS MODEL
LEPTONS
PHASE TRANSFORMATIONS
QUARKS
TRANSPORT
VIOLATIONS