Spontaneous baryogenesis without baryon isocurvature

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 th...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2017-02, Vol.2017 (2), p.36-36
Main Authors: Simone, Andrea De, Kobayashi, Takeshi
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BARYONS
DISTURBANCES
FLUCTUATIONS
PARTICLE PRODUCTION
PERTURBATION THEORY
SCALAR FIELDS
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Summary: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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2017/02/036