Abstract
We study |$Q$|-ball dark matter in gauge-mediated supersymmetry breaking, and seek the possibility of detection in the IceCube experiment. We find that the |$Q$| balls would be the dark matter in the parameter region different from that for gravitino dark matter. In particular, the |$Q$| ball is a good dark matter candidate for low reheating temperature, which may be suitable for the Affleck–Dine baryogenesis and|$/$|or nonthermal leptogenesis. Dark matter |$Q$| balls are detectable by IceCube-like experiments in the future, which is a peculiar feature compared to the case of gravitino dark matter.
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