Phys. Rev. Lett. 87, 141301 (2001) [4 pages]Q-Ball Candidates for Self-Interacting Dark MatterReceived 1 June 2001; published 13 September 2001 We show that nontopological 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. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.141301
DOI:
10.1103/PhysRevLett.87.141301
PACS:
95.35.+d, 98.80.Cq
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