Warming up cold inflation
نویسندگان
چکیده
The axion is a well-motivated candidate for the inflaton, as radiative corrections that spoil many single-field models are avoided by virtue of its shift symmetry. However, axions generically couple to gauge sectors. As slow-rolls during inflation, this coupling can cause production non-diluting thermal bath, situation known "warm inflation." This bath dramatically alter inflationary dynamics and observable predictions. In paper, we demonstrate form wide variety initial conditions. Furthermore, find inflation becomes warm over large range couplings, explicitly map parameter space two potentials. We show in regions space, once assumed be safely "cold" fact warm, must reevaluated context.
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2021
ISSN: ['1475-7516', '1475-7508']
DOI: https://doi.org/10.1088/1475-7516/2021/11/011