Collisional Dark Matter and Scalar Phantoms
Abstract
As has been previously proposed, a minimal modification of the standard SU(3)× SU(2)× U(1) theory provides a viable dark matter candidate. Such a particle, a scalar gauge singlet, is naturally self-interacting---making it of particular interest given recent developments in astrophysics. We review this dark matter candidate, with reference to the parameter ranges currently under discussion.
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