Speaker
Shinta Kasuya
(Kanagawa University, Japan)
Description
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 the peculiar feature compared to the case of gravitino dark matter.
