Mixing-induced CP violating sources for electroweak baryogenesis from a semiclassical approach
Abstract
The effects of flavor mixing in electroweak baryogenesis is investigated in a generalized semiclassical WKB approach. Through calculating the nonadiabatic corrections to the particle currents it is shown that extra CP violation sources arise from the off-diagonal part of the equation of motion of particles moving inside the bubble wall. This type of mixing-induced source is of the first order in derivative expansion of the Higgs condensate, but is oscillation suppressed. The numerical importance of the mixing-induced source is discussed in the Minimal Supersymmetric Standard Model and compared with the source term induced by semiclassical force. It is found that in a large parameter space where oscillation suppression is not strong enough, the mixing-induced source can dominate over that from the semiclassical force.
Cite
@article{arxiv.0805.3045,
title = {Mixing-induced CP violating sources for electroweak baryogenesis from a semiclassical approach},
author = {Yu-Feng Zhou},
journal= {arXiv preprint arXiv:0805.3045},
year = {2008}
}
Comments
19 pp, 2 figs, 1 table, some comments added, to appear in Eur.Phys.J.C