Inflation, modulation and baryogenesis with warm directions

TL;DR

This paper explores various dissipative flat directions in SUSY models during inflation, focusing on their roles in baryogenesis and the implications of non-thermal backgrounds, extending beyond traditional warm inflation scenarios.

Contribution

It introduces new possibilities for dissipative flat directions in SUSY models, analyzing their effects on inflation and baryogenesis beyond the warm inflation paradigm.

Findings

Dissipative flat directions can influence inflationary dynamics and baryogenesis.

Non-thermal backgrounds significantly affect dissipation calculations.

Alternative dissipative mechanisms are viable without warm inflation constraints.

Abstract

There are many flat directions in SUSY models, which may dissipate their energy and source the radiation background during inflation. However, the only possibility that has been studied in this direction is warm inflation, which uses "warm" (or "dissipative" if we consider more modest situation) direction as the inflaton. In this talk we discuss other significant possibilities of such directions which are dissipative and may or may not be "warm". Affleck-Dine (AD) mechanism and other cosmological scenarios are discussed in the light of "dissipative field", instead of using the conventional light field with mass protection. We sometimes consider Morikawa-Sasaki coefficient for the non-thermal background, which is important because the dissipation calculated for a naive thermal background with $T\to 0$ is not enough to discuss the dissipation with the non-thermal background.