Chern-Simons number asymmetry from CP violation at electroweak tachyonic preheating
High Energy Physics - Phenomenology
2009-11-07 v2 High Energy Physics - Lattice
Abstract
We consider the creation of non-zero Chern-Simons number in a model of the early Universe, where the Higgs field experiences a fast quench at the end of inflation and subsequently rolls down its potential barrier. Neglecting the expansion, we perform numerical lattice simulations in the Abelian Higgs model in 1+1 dimensions with an added phenomenological C and P violating term during this stage of so-called tachyonic preheating. The results suggest that even the sign of the Chern-Simons and thus baryon number is dependent on the ratio of the Higgs to W mass. We also discuss the appropriate choice of vacuum initial conditions for classical simulations.
Cite
@article{arxiv.hep-ph/0211243,
title = {Chern-Simons number asymmetry from CP violation at electroweak tachyonic preheating},
author = {Jan Smit and Anders Tranberg},
journal= {arXiv preprint arXiv:hep-ph/0211243},
year = {2009}
}
Comments
24 pages, 17 figures, added references, published version