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Gravitational misalignment mechanism of Dark Matter production
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SYSNO ASEP 0540712 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Gravitational misalignment mechanism of Dark Matter production Author(s) Babichev, E. (FR)
Gorbunov, D. (RU)
Ramazanov, Sabir (FZU-D) ORCIDNumber of authors 3 Article number 047 Source Title Journal of Cosmology and Astroparticle Physics. - : Institute of Physics Publishing - ISSN 1475-7516
Roč. 2020, č. 8 (2020), s. 1-17Number of pages 17 s. Language eng - English Country GB - United Kingdom Keywords spontaneous symmetry breaking ; curvature: Ricci ; dark matter: production ; singlet: scalar ; modified gravity Subject RIV BE - Theoretical Physics OECD category Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) R&D Projects GJ20-16531Y GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000590146600031 EID SCOPUS 85090883032 DOI 10.1088/1475-7516/2020/08/047 Annotation 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).
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021 Electronic address https://doi.org/10.1088/1475-7516/2020/08/047
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