Abstract
We consider thermal production mechanisms of self-interacting dark matter in models with gauged Z 3 symmetry. A complex scalar dark matter is stabilized by the Z 3, that is the remnant of a local dark U(1) d . Light dark matter with large self-interaction can be produced from thermal freeze-out in the presence of SM-annihilation, SIMP and/or forbidden channels. We show that dark photon and/or dark Higgs should be relatively light for unitarity and then assist the thermal freeze-out. We identify the constraints on the parameter space of dark matter self-interaction and mass in cases that one or some of the channels are important in determining the relic density.
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Choi, SM., Kang, YJ. & Lee, H.M. On thermal production of self-interacting dark matter. J. High Energ. Phys. 2016, 99 (2016). https://doi.org/10.1007/JHEP12(2016)099
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DOI: https://doi.org/10.1007/JHEP12(2016)099