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arXiv · 1610.05783

Spontaneous Baryogenesis without Baryon Isocurvature

Andrea De Simone·Takeshi Kobayashi
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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.

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Andrea De Simone, Takeshi Kobayashi. 2016-10-18. Spontaneous Baryogenesis without Baryon Isocurvature. https://doi.org/10.1088/1475-7516%2F2017%2F02%2F036

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