Preheating and Affleck-Dine leptogenesis after thermal inflation

Details Preheating and Affleck-Dine leptogenesis after thermal inflation Preheating and Affleck-Dine leptogenesis after thermal inflation

2007-03-26

arxiv.org/abs/hep-ph/0703275v1

JCAP 0706:005,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

38 pages, 17 figures

Scientific paper

10.1088/1475-7516/2007/06/005

Previously, we proposed a model of low energy Affleck-Dine leptogenesis in the context of thermal inflation. The lepton asymmetry is generated at the end of thermal inflation, which occurs at a relatively low energy scale with the Hubble parameter somewhere in the range $1 \keV \lesssim H \lesssim 1 \MeV$. Thus Hubble damping will be ineffective in bringing the Affleck-Dine field into the lepton conserving region near the origin, leaving the possibility that the lepton number could be washed out. Previously, we suggested that preheating could damp the amplitude of the Affleck-Dine field allowing conservation of the lepton number. In this paper, we demonstrate numerically that preheating does efficiently damp the amplitude of the Affleck-Dine field and that the lepton number is conserved as the result. In addition to demonstrating a crucial aspect of our model, it also opens the more general possibility of low energy Affleck-Dine baryogenesis.

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