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arXiv · 2107.14548

Massive Gravitons as Feebly Interacting Dark Matter Candidates

Haiying Cai·Giacomo Cacciapaglia·Seung J. Lee
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Abstract

We detailed 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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Haiying Cai, Giacomo Cacciapaglia, Seung J. Lee. 2021-07-30. Massive Gravitons as Feebly Interacting Dark Matter Candidates. https://doi.org/10.1103/physrevlett.128.081806

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