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. © 2017 IOP Publishing Ltd and Sissa Medialab srl .

Spontaneous baryogenesis without baryon isocurvature

De Simone, Andrea;KOBAYASHI, Takeshi
2017

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. © 2017 IOP Publishing Ltd and Sissa Medialab srl .
2017
2
1
20
36
https://arxiv.org/abs/1610.05783
http://cdsads.u-strasbg.fr/abs/2017JCAP...02..036D
De Simone, Andrea; Kobayashi, Takeshi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/48259
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