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arXiv · 1803.01866

Spin-2 Portal Dark Matter

Nicolas Bernal·Maira Dutra·Yann Mambrini·Keith A. Olive·Marco Peloso·Mathias Pierre
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Abstract

We generalize models invoking a spin-2 particle as a mediator between the dark sector and the Standard Model. We show that a massive spin-2 messenger can efficiently play the role of a portal between the two sectors. The dark matter is then produced via a freeze-in mechanism during the reheating epoch. In a large part of the parameter space, production through the exchange of a massive spin-2 mediator dominates over processes involving a graviton with Planck suppressed couplings. We perform a systematic analysis of such models for different values of the spin-2 mass relative to the maximum and the final temperature attained at reheating.

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Nicolas Bernal, Maira Dutra, Yann Mambrini, Keith A. Olive, Marco Peloso, Mathias Pierre. 2018-03-05. Spin-2 Portal Dark Matter. https://doi.org/10.1103/physrevd.97.115020

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