Spontaneous Lorentz Violation and Baryogenesis
Abstract
In the presence of background fields that spontaneously violate Lorentz invariance, a matter-antimatter asymmetry can be generated even in thermal equilibrium. In this paper we systematically investigate models of this type, showing that either high-energy or electroweak versions of baryogenesis are possible, depending on the dynamics of the Lorentz-violating fields. We identify two scenarios of interest: baryogenesis from a weak-scale pseudo-Nambu-Goldstone boson with intermediate-scale baryon-number violation, and sphaleron-induced baryogenesis driven by a constant-magnitude vector with a late-time phase transition.
Cite
@article{arxiv.0711.2519,
title = {Spontaneous Lorentz Violation and Baryogenesis},
author = {Jing Shu},
journal= {arXiv preprint arXiv:0711.2519},
year = {2016}
}
Comments
Contributed to 4th Meeting on CPT and Lorentz Symmetry (CPT 07), Bloomington, Indiana, August 8-11. References added for the new version