Article

# Two-scalar-field model for the interaction of dark energy and dark matter

Physical review D: Particles and fields 06/2012; 86(10). DOI:10.1103/PhysRevD.86.103522
Source: arXiv

ABSTRACT In this paper, we study the effects of an interaction between dark matter and
dark energy through a two scalar field model with a potential
$V(\phi,\chi)=e^{-\lambda\phi}P(\phi,\chi)$, where $P(\phi,\chi)$ is a
polynomial. We show that the cosmic expansion dynamics of the Universe is
reproduced for a large range of the bare mass of the dark matter field and that
there exist solutions with transient accelerated expansion. A modification in
the exponential behavior of the potential is studied, with important physical
implications, including the possibility of more realistic transient
acceleration solutions.

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##### Article: Self-interacting Dark Matter and the Higgs boson
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ABSTRACT: Self-interacting dark matter has been suggested in order to overcome the difficulties of the Cold Dark Matter model on galactic scales. We argue that a scalar gauge singlet coupled to the Higgs boson, which could lead to an invisibly decaying Higgs, is an interesting candidate for this self-interacting dark matter particle. We also present estimates on the abundance of these particles today as well as consequences to non-Newtonian forces. Comment: 4 pages, Revtex
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