SIMP dark matter with gauged $Z_3$ symmetry
Abstract
We consider a complex scalar field as SIMP dark matter in models with gauged discrete symmetry appearing as a remnant of dark local . Dark matter (DM) annihilates dominantly by the 3-to-2 scattering, due to the DM cubic coupling in combination with the DM quartic coupling or the gauge and dark Higgs couplings. We show that a light gauge boson makes DM in kinetic equilibrium with thermal plasma at freeze-out and it affects the DM relic density and perturbativity/unitarity constraints for DM self-interactions. We show that the large DM self-interactions are consistent with solving small-scale structure problems and explaining the DM halo separation recently observed in Abell 3827 cluster. Various bounds on the model from the SIMP conditions, DM self-interactions, searches, DM direct/indirect detection experiments, and Higgs signals, are also discussed.
Keywords
Cite
@article{arxiv.1505.00960,
title = {SIMP dark matter with gauged $Z_3$ symmetry},
author = {Soo-Min Choi and Hyun Min Lee},
journal= {arXiv preprint arXiv:1505.00960},
year = {2015}
}
Comments
22 pages, 9 figures, Accepted for a publication in JHEP