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arXiv · 2008.00529

Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force

Amin Aboubrahim·Wan-Zhe Feng·Pran Nath·Zhu-Yao Wang
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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.

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Amin Aboubrahim, Wan-Zhe Feng, Pran Nath, Zhu-Yao Wang. 2020-08-02. Self-interacting hidden sector dark matter, small scale galaxy structure anomalies, and a dark force. https://doi.org/10.1103/physrevd.103.075014

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