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Massive Gravitons as Feebly Interacting Dark Matter Candidates

Authors
Cai, HaiyingCacciapaglia, GiacomoLee, Seung J.
Issue Date
23-2월-2022
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.128, no.8
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW LETTERS
Volume
128
Number
8
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/140291
DOI
10.1103/PhysRevLett.128.081806
ISSN
0031-9007
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.
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