Isocurvature fluctuations in Affleck-Dine mechanism and constraints on inflation models

TL;DR

This paper examines how the Affleck-Dine mechanism can produce baryonic isocurvature fluctuations across various supergravity inflation models, highlighting the constraints on inflation scale and reheating temperature to prevent excessive fluctuations.

Contribution

It demonstrates that baryonic isocurvature fluctuations are generically produced in supergravity inflation models and derives constraints on inflation parameters.

Findings

Baryonic isocurvature fluctuations are common in supergravity inflation models.

Constraints on inflation scale and reheating temperature are necessary to limit fluctuations.

The analysis informs viable inflation model parameters to avoid large isocurvature perturbations.

Abstract

We reconsider the Affleck-Dine mechanism for baryogenesis and show that the baryonic isocurvature fluctuations are generated in many inflation models in supergravity. The inflationary scale and the reheating temperature must satisfy certain constraints to avoid too large baryonic isocurvature fluctuations.