Cosmology of Radiatively Generated Axion Scale

Abstract

We discuss some cosmological aspects of supersymmetric axion models in which the axion scale is radiatively generated in terms of the weak scale and the Planck scale. They include thermal inflation, axions produced by the decay of oscillating Peccei-Quinn flatons, late time baryogenesis, and finally the possibility to raise up the cosmological upper bound on the axion scale in thermal inflation scenario.