Massive Gravitons as Feebly Interacting Dark Matter Candidates

Haiying Cai, Giacomo Cacciapaglia, Seung J. Lee

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


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 languageEnglish
Article number081806
JournalPhysical review letters
Issue number8
Publication statusPublished - 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


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