Gravitational reheating and superheavy Dark Matter creation after inflation with non-minimal coupling

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00540694" target="_blank" >RIV/68378271:_____/20:00540694 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1475-7516/2020/09/059" target="_blank" >https://doi.org/10.1088/1475-7516/2020/09/059</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1475-7516/2020/09/059" target="_blank" >10.1088/1475-7516/2020/09/059</a>

Result language
angličtina
Original language name
Gravitational reheating and superheavy Dark Matter creation after inflation with non-minimal coupling
Original language description
We discuss the gravitational creation of superheavy particles χ in an inflationary scenario with a quartic potential and a non-minimal coupling between the inflaton ϕ and the Ricci curvature: ξ ϕ2 R/2. We show that for large constants ξ ≫ 1, there can be abundant production of particles χ with masses largely exceeding the inflationary Hubble rate Hinfl, up to (a few) × ξ Hinfl, even if they are conformally coupled to gravity. We discuss two scenarios involving these gravitationally produced particles χ. In the first scenario, the inflaton has only gravitational interactions with the matter sector and the particles χ reheat the Universe. In this picture, the inflaton decays only due to the cosmic expansion, and effectively contributes to dark radiation, which can be of the observable size.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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