TL;DR
This paper investigates how matter-antimatter asymmetry can be generated during bosonic preheating, analyzing different scenarios and proposing a new baryogenesis mechanism without loop corrections or field rotation.
Contribution
It introduces a novel baryogenesis scenario where asymmetry arises during preheating without relying on loop effects or field rotation.
Findings
Asymmetry can grow during preheating if it appears in the particle production factor.
Different scenarios for asymmetric preheating are distinguished and analyzed.
A new baryogenesis mechanism is proposed that does not require loop corrections or field rotation.
Abstract
We study the generation of the matter-antimatter asymmetry during bosonic preheating, focusing on the sources of the asymmetry. If the asymmetry appears in the multiplication factor of the resonant particle production, the matter-antimatter ratio will grow during preheating. On the other hand, if the asymmetry does not grow during preheating, one has to find out another reason. We consider several scenarios for the asymmetric preheating to distinguish the sources of the asymmetry. We also discuss a new baryogenesis scenario, in which the asymmetry is generated without introducing neither loop corrections nor rotation of a field.
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