Spin-2 Portal Dark Matter
High Energy Physics - Phenomenology
2018-06-20 v1 High Energy Astrophysical Phenomena
High Energy Physics - Theory
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.
Cite
@article{arxiv.1803.01866,
title = {Spin-2 Portal Dark Matter},
author = {Nicolas Bernal and Maira Dutra and Yann Mambrini and Keith A. Olive and Marco Peloso and Mathias Pierre},
journal= {arXiv preprint arXiv:1803.01866},
year = {2018}
}
Comments
10 pages, 3 figures