Quark Diffusion and Baryogenesis at the Electroweak Phase Transition
Abstract
Baryogenesis at the electroweak phase transition may take place through CP-violating reflections of quarks from expanding bubbles of the broken symmetry phase. We formulate and approximately solve the transport equations for the reflected quark asymmetries. The results are comparable to a previous Monte Carlo calculation and allow for analytic estimates of the baryon asymmetry when the bubble walls have a small velocity. Our method predicts no velocity-dependence for in the small limit, unlike results obtained from a simplified treatment based on the diffusion equation.
Cite
@article{arxiv.hep-ph/9405365,
title = {Quark Diffusion and Baryogenesis at the Electroweak Phase Transition},
author = {James M. Cline},
journal= {arXiv preprint arXiv:hep-ph/9405365},
year = {2009}
}
Comments
11pp, 2 latex-generated figures using bezier.sty (included), UMN-TH-1259-94. Errors corrected (suppression due to finite wall thickness is reduced), explanations expanded (especially concerning the Fokker-Planck approximation of the collision term), *NEW DISCUSSION* of the different velocity dependence predicted by Boltzmann equation versus the diffusion equation. To appear in Phys. Lett. B