Cosmological implications of supersymmetric axion models

TL;DR

This paper explores the cosmological constraints on supersymmetric axion models, focusing on saxion and axino effects, leading to strict limits on their energy densities and the reheating temperature.

Contribution

It provides a comprehensive analysis of the cosmological implications of supersymmetric axion models, emphasizing saxion and axino constraints across various mass ranges.

Findings

Severe constraints on saxion energy density for keV to TeV masses.

Stringent upper bounds on reheating temperature due to saxion and axino constraints.

Implications for model viability and early universe cosmology.

Abstract

We derive general constraints on supersymmetric extension of axion models, in particular paying careful attention to the cosmological effects of saxion. It is found that for every mass range of the saxion from keV to TeV, severe constraints on the energy density of the saxion are imposed. Together with constraints from axino we obtain stringent upper bounds on the reheating temperature.