Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force
High Energy Physics - Phenomenology
2021-04-21 v3
Abstract
The short distance behavior of dark matter (DM) at galaxy scales exhibits several features not explained by the typical cold dark matter (CDM) with velocity-independent cross-section. We discuss a particle physics model with a hidden sector interacting feebly with the visible sector where a dark fermion self-interacts via a dark force with a light dark photon as the mediator. We study coupled Boltzmann equations involving two temperatures, one for each sector. We fit the velocity-dependent DM cross-section to the data from scales of dwarf galaxies to clusters consistent with relic density constraint.
Cite
@article{arxiv.2008.00529,
title = {Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force},
author = {Amin Aboubrahim and Wan-Zhe Feng and Pran Nath and Zhu-Yao Wang},
journal= {arXiv preprint arXiv:2008.00529},
year = {2021}
}
Comments
11 pages, 9 figures, 1 table