Spontaneous Baryogenesis without Baryon Isocurvature
High Energy Physics - Phenomenology
2017-03-30 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We propose a new class of spontaneous baryogenesis models that does not produce baryon isocurvature perturbations. The baryon chemical potential in these models is independent of the field value of the baryon-generating scalar, hence the scalar field fluctuations are blocked from propagating into the baryon isocurvature. We demonstrate this mechanism in simple examples where spontaneous baryogenesis is driven by a non-canonical scalar field. The suppression of the baryon isocurvature allows spontaneous baryogenesis to be compatible even with high-scale inflation.
Keywords
Cite
@article{arxiv.1610.05783,
title = {Spontaneous Baryogenesis without Baryon Isocurvature},
author = {Andrea De Simone and Takeshi Kobayashi},
journal= {arXiv preprint arXiv:1610.05783},
year = {2017}
}
Comments
21 pages, 3 figures; v2: improved discussion of cutoff, published in JCAP