Abstract
We detail our discovery of a chiral enhancement in the production cross sections of massive spin-2 gravitons, below the electroweak symmetry breaking scale, that makes them ideal dark matter candidates for the freeze-in mechanism. The result is independent of the physics at high scales and points toward masses in the keV-MeV range. The graviton is, therefore, a sub-MeV dark matter particle, as favored by the small scale galaxy structures. We apply the novel calculation to a Randall-Sundrum model with multiple branes, showing a significant parameter space where the first two massive gravitons saturate the dark matter relic density.
Original language | English |
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Article number | 081806 |
Journal | Physical review letters |
Volume | 128 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2022 Feb 25 |
Bibliographical note
Publisher Copyright:© 2022 authors. Published by the American Physical Society. Funded by SCOAP3.
ASJC Scopus subject areas
- General Physics and Astronomy