Towards Constraining Affleck-Dine Baryogenesis

TL;DR

This paper explores how the geometric structure of the Kahler potential influences Affleck-Dine baryogenesis, revealing that current CMB data impose strong constraints on certain models through their impact on inflaton dynamics.

Contribution

It provides a geometric characterization of the Kahler potential constraints and links the Affleck-Dine field backreaction to observable CMB features, offering new insights into baryogenesis models.

Findings

Current CMB data severely constrain some Affleck-Dine baryogenesis models.

The backreaction of the Affleck-Dine field can be mapped to an inflaton potential with a step.

Geometric analysis of the Kahler potential reveals specific constraints on model parameters.

Abstract

Affleck-Dine baryogenesis is preconditioned on a certain structure of non-renormalizable operators in the Kahler potential. In this paper, we geometrically characterize the resulting constraint on the field space Kahler geometry and survey the Lagrangian for correlated predictions. The Affleck-Dine field backreacts on the inflaton, and by mapping the backreacted potential to an inflaton potential with a step, we find that current CMB data severely constrain some versions of the scenario.