New mechanism of producing superheavy Dark Matter

0519750 - FZÚ 2020 RIV NL eng J - Journal Article
Babichev, E. - Gorbunov, D. - Ramazanov, Sabir
New mechanism of producing superheavy Dark Matter.
Physics Letters. B. Roč. 794, Jul (2019), s. 69-76. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT EF15_003/0000437
Grant - others:OP VVV - CoGraDS(XE) CZ.02.1.01/0.0/0.0/15_003/0000437
Institutional support: RVO:68378271
Keywords : energy cosmic-rays * particle-production * scalaron * creation * Higgs * vacuum
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impact factor: 4.384, year: 2019
Method of publishing: Open access

We study in detail the recently proposed mechanism of generating superheavy Dark Matter with the mass larger than the Hubble rate at the end of inflation. A real scalar field constituting Dark Matter linearly couples to the inflaton. As a result of this interaction, the scalar gets displaced from its zero expectation value. This offset feeds into the energy density of Dark Matter. This mechanism is universal and can be implemented in a generic inflationary scenario. Phenomenology of the model is comprised of Dark Matter decay into inflatons, which in turn decay into Standard Model species triggering cascades of high energy particles contributing to the cosmic ray flux. We evaluate the lifetime of Dark Matter and obtain limits on the inflationary scenarios, where this mechanism does not lead to the conflict with the Dark Matter stability considerations/studies of cosmic ray propagation.
Permanent Link: http://hdl.handle.net/11104/0304742