Despicable dark relics : generated by gravity with unconstrained masses
Fairbairn, M., Kainulainen, K., Markkanen, T., & Nurmi, S. (2019). Despicable dark relics : generated by gravity with unconstrained masses. Journal of Cosmology and Astroparticle Physics, 2019(4), Article 005. https://doi.org/10.1088/1475-7516/2019/04/005
Published inJournal of Cosmology and Astroparticle Physics
© 2019 IOP Publishing Ltd and Sissa Medialab
We demonstrate the existence of a generic, efficient and purely gravitational channel producing a significant abundance of dark relics during reheating after the end of inflation. The mechanism is present for any inert scalar with the non-minimal curvature coupling ξ Rχ2 and the relic production is efficient for modest values ξ = Script O(1). The observed dark matter abundance can be reached for a broad range of relic masses extending from m ~ 1 k eV to m ~ 108 GeV, depending on the scale of inflation and the dark sector couplings. Frustratingly, such relics escape direct, indirect and collider searches since no non-gravitational couplings to visible matter are needed.
PublisherIOP Publishing; Sissa
Publication in research information system
MetadataShow full item record
Related funder(s)Academy of Finland
Funding program(s)Academy Project, AoF
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