The Dark Side of the Universe

Details The Dark Side of the Universe The Dark Side of the Universe

2005-08-11

arxiv.org/abs/astro-ph/0508279v1

Nucl.Instrum.Meth.A559:337-340,2006

Astronomy and Astrophysics

Astrophysics

paper for conference proceeding of LTD-11 WOrkshop in Tokyo, August 2005, 5 pages, 2 figures

Scientific paper

10.1016/j.nima.2005.12.132

I will begin by reviewing the evidence for Dark Matter in the Universe, as well as the candidates for dark matter. At most 20% of the dark matter in galaxies can be in the form of MACHOs (Massive Compact Halo Objects); the remainder appears to be some unknown exotic component. The most sensible candidates from the point of view of particle physics are axions and WIMPs (Weakly Interacting Massive Particles), where WIMPs may be supersymmetric particles. Three recent claims of possible detection of WIMP dark matter are tantalizing and will be discussed: the DAMA annual modulation, the HEAT positron excess, and gamma-rays from the Galactic Center. In addition, I will discuss the dependence of signals in detectors on the mass distribution in the Galactic Halo. In particular, the Sagittarius stream can be a smoking gun for WIMP detection.

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