Quark Diffusion and Baryogenesis at the Electroweak Phase Transition

Details Quark Diffusion and Baryogenesis at the Electroweak Phase Transition Quark Diffusion and Baryogenesis at the Electroweak Phase Transition

1994-05-23

arxiv.org/abs/hep-ph/9405365v2

Phys.Lett. B338 (1994) 263-268

Physics

High Energy Physics

High Energy Physics - Phenomenology

11pp, 2 latex-generated figures using bezier.sty (included), UMN-TH-1259-94. Errors corrected (suppression due to finite wall

Scientific paper

10.1016/0370-2693(94)91376-5

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 $\Delta B$ when the bubble walls have a small velocity. Our method predicts no velocity-dependence for $\Delta B$ in the small $v$ limit, unlike results obtained from a simplified treatment based on the diffusion equation.

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