Gravitational misalignment mechanism of Dark Matter production

0540712 - FZÚ 2021 RIV GB eng J - Journal Article
Babichev, E. - Gorbunov, D. - Ramazanov, Sabir
Gravitational misalignment mechanism of Dark Matter production.
Journal of Cosmology and Astroparticle Physics. Roč. 2020, č. 8 (2020), s. 1-17, č. článku 047. ISSN 1475-7516. E-ISSN 1475-7516
R&D Projects: GA ČR(CZ) GJ20-16531Y
Institutional support: RVO:68378271
Keywords : spontaneous symmetry breaking * curvature: Ricci * dark matter: production * singlet: scalar * modified gravity
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 5.839, year: 2020
Method of publishing: Limited access
https://doi.org/10.1088/1475-7516/2020/08/047

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 Z2-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 106−107 GeV).

Permanent Link: http://hdl.handle.net/11104/0318329