Q-ball candidates for self-interacting dark matter

Abstract

We show that non-topological solitons, known as Q-balls, are promising candidates for self-interacting dark matter. They can satisfy the cross-section requirements for a broad range of masses. Unlike previously considered examples, Q-balls can stick together after collision, reducing the effective self-interaction rate to a negligible value after a few collisions per particle. This feature modifies predictions for halo formation. We also discuss the possibility that Q-balls have large interaction cross-sections with ordinary matter.

4 pages, 1 figure

References in corpus (1)

• Unitarity Bounds and the Cuspy Halo Problem

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