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arXiv · 1111.4364

Limits on Self-Interacting Dark Matter

Chris Kouvaris
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Abstract

We impose new severe constraints on the self-interactions of fermionic asymmetric dark matter based on observations of nearby old neutron stars. WIMP self-interactions mediated by Yukawa- type interactions can lower significantly the number of WIMPs necessary for gravitational collapse of the WIMP population accumulated in a neutron star. Even nearby neutron stars located at regions of low dark matter density can accrete sufficient number of WIMPs that can potentially collapse, form a mini black hole, and destroy the host star. Based on this, we derive constraints on the WIMP self-interactions which in some cases are by several orders of magnitude stricter than the ones from the bullet cluster (which are currently considered the most stringent).

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Chris Kouvaris. 2011-11-18. Limits on Self-Interacting Dark Matter. https://doi.org/10.1103/physrevlett.108.191301

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