Electroweak Baryogenesis in the Presence of an Isosinglet Quark
High Energy Physics - Phenomenology
2014-11-17 v1
Abstract
We consider the possibility of electroweak baryogenesis in a simple extension of the standard model with an extra singlet complex scalar and a vector-like down quark. We show that in the present model the first-order electroweak phase transition can be strong enough to avoid the baryon asymmetry washout by sphalerons and that the CP-violating effects can be sufficient to explain the observed baryon-to-entropy ratio nB/s ~ 10^(-10). Other appealing features of the model include the generation of a CKM phase from spontaneous CP breaking at a high energy scale and a possible solution of the strong CP problem through the natural suppression of the parameter theta.
Keywords
Cite
@article{arxiv.hep-ph/9805302,
title = {Electroweak Baryogenesis in the Presence of an Isosinglet Quark},
author = {G. C. Branco and D. Delepine and D. Emmanuel-Costa and R. Gonzalez Felipe},
journal= {arXiv preprint arXiv:hep-ph/9805302},
year = {2014}
}
Comments
LaTeX, 19 pages, 2 EPS figures, uses epsf, amsmath, amsfonts, amssymb