Particle Currents on a CP Violating Higgs Background and the Spontaneous Baryogenesis Mechanism

Abstract

We compute the particle currents induced on a bubble wall background at finite temperature in a model with CP violation in the Higgs sector. Using a field theory approach we show that fermionic currents arise at one loop, so that a suppression factor $\mathcal{O}(h_t\varphi /\pi T{)}^2$ with respect to previous computations is found. The contributions to the Higgs currents are also derived and their relevancy for the spontaneous baryogenesis mechanism is discussed.

Comments: 10 pages, LaTeX file, uses epsf.sty, 4 figures available as a compressed .eps file