paper

Spontaneous Baryogenesis without Baryon Isocurvature

arXiv:1610.05783 · doi:10.1088/1475-7516/2017/02/036

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.

21 pages, 3 figures; v2: improved discussion of cutoff, published in JCAP

References in corpus (7)