Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-06-09
Phys.Rev. D54 (1996) 2451-2472
Physics
High Energy Physics
High Energy Physics - Phenomenology
49 pp. latex, 6 figures; section on diffusion expanded and corrected, published version
Scientific paper
10.1103/PhysRevD.54.2451
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 CP-violating phase with a commonly used ansatz. We note that the phenomenon of spontaneous CP violation at high temperature can occur in this model, even when there is no 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 marginally strong enough to produce the observed baryon asymmetry of the universe.
Cline James M.
Kainulainen Kimmo
Vischer Axel P.
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