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Gravitational misalignment mechanism of Dark Matter production

Authors
  • Babichev, Eugeny
  • Gorbunov, Dmitry
  • Ramazanov, Sabir
Type
Published Article
Publication Date
Oct 01, 2020
Submission Date
Apr 07, 2020
Identifiers
DOI: 10.1088/1475-7516/2020/08/047
Source
arXiv
License
Yellow
External links

Abstract

We consider Dark Matter composed of an oscillating singlet scalar field. On top of the mass term, the scalar is equipped with a potential spontaneously breaking Z_2-symmetry. This potential dominates at early times and leads to the time-dependent expectation value of the scalar, which decreases in the expanding Universe. As it drops below some critical value, the symmetry gets restored, and the Dark Matter field starts to oscillate around zero. We arrange the spontaneous symmetry breaking through the interaction of the scalar with the Ricci curvature. In that way, superheavy Dark Matter can be produced at very early times. Depending on its mass, the production takes place at inflation (very large masses up to the Grand Unification scale), at preheating, or at radiation-dominated stage (masses 10^{6}-10^{7} Gev).

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