Axionic Dark Matter in a Bi-Metric Universe

Author:

Maldonado Carlos1,Méndez Fernando1ORCID

Affiliation:

1. Departamento de Física, Facultad de Ciencia, Universidad de Santiago de Chile (USACH), Santiago 9170124, Chile

Abstract

We study the evolution and production of axion dark matter in a universe model with two scale factors corresponding to different patches of the universe. The interaction between patches is described through a deformed Poisson bracket structure. The first part of the present paper is devoted to a review of the results reported in previous works concerning the study of dark matter as WIMPs and FIMPs. The new results concerning axionic dark matter in this bi-metric scenario show that different values of the deformation parameter κ allow values of masses and misalignment angles forbidden in standard cosmology. The present model can also be considered a different type of nonstandard cosmology consistent with previously reported results.

Funder

Dicyt-USACH

Publisher

MDPI AG

Subject

General Physics and Astronomy

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