Mechanism for thermal relic dark matter of strongly interacting massive particles

Yonit Hochberg*, Eric Kuflik, Tomer Volansky, Jay G. Wacker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a new paradigm for achieving thermal relic dark matter. The mechanism arises when a nearly secluded dark sector is thermalized with the standard model after reheating. The freeze-out process is a number-changing 3→2 annihilation of strongly interacting massive particles (SIMPs) in the dark sector, and points to sub-GeV dark matter. The couplings to the visible sector, necessary for maintaining thermal equilibrium with the standard model, imply measurable signals that will allow coverage of a significant part of the parameter space with future indirect- and direct-detection experiments and via direct production of dark matter at colliders. Moreover, 3→2 annihilations typically predict sizable 2→2 self-interactions which naturally address the "core versus cusp" and "too-big-to-fail" small-scale structure formation problems.

Original languageEnglish
Article number171301
JournalPhysical Review Letters
Volume113
Issue number17
DOIs
StatePublished - 22 Oct 2014

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