Spontaneous baryogenesis without baryon isocurvature

Journal Article · Wed Feb 01 04:00:00 EST 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/02/036· OSTI ID:22680018

Simone, Andrea De; Kobayashi, Takeshi ^[1]

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1. SISSA and INFN Sezione di Trieste, Via Bonomea 265, 34136 Trieste (Italy)

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.

• OSTI ID: 22680018
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 02 Vol. 2017; ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BARYONS
DISTURBANCES
FLUCTUATIONS
PARTICLE PRODUCTION
PERTURBATION THEORY
SCALAR FIELDS