Effect of CP-violation on the sphaleron rate

Abstract

We calculate the effect of two CP-violating (dimension-eight) operators of the SU(2)-Higgs model on the motion along a particular path from the vacuum to the sphaleron. It turns out that CP-violation may introduce a difference between the sphaleron rate towards larger Chern-Simons number and the rate towards smaller Chern-Simons number. Such a difference induces a non-zero baryon-number without a first order phase transition.

7 pages, final formula + some typos corrected

References in corpus (2)

• Non-equilibrium electroweak baryogenesis from preheating after inflation
• Supersymmetric Electroweak Phase Transition: Baryogenesis versus Experimental Constraints

Cited by in corpus (3)

• Asymmetric Chern-Simons number diffusion from CP-violation
• The Electroweak Vacuum Angle at Finite Temperature and Implications for Baryogenesis
• Baryogenesis in $SU(2{)}_L$ multiplet models