Massive Gravitons as Feebly Interacting Dark Matter Candidates

Haiying Cai, Giacomo Cacciapaglia, Seung J. Lee

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    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 languageEnglish
    Article number081806
    JournalPhysical review letters
    Volume128
    Issue number8
    DOIs
    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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