Small scale WIMP physics

Details Small scale WIMP physics Small scale WIMP physics

2005-08-25

arxiv.org/abs/astro-ph/0508553v2

AIP Conf.Proc.805:431-434,2006

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, to appear in the proceedings of PASCOS2005, Gyeongju, Korea, May 30-June 4 2005, v2: additional references

Scientific paper

10.1063/1.2149748

The dark matter distribution on small scales may depend on the the properties of the first generation of dark matter halos to form, which is in turn determined by the microphysics of the dark matter particles. We overview the microphysics of WIMPs and our calculations of the collisional damping and free streaming scales. We then plot the resulting density perturbation power spectrum and red-shift at which typical halos form, taking into account the effect of uncertainties in the WIMP properties (mass and interaction channel) and the primordial power spectrum. Finally we review recent developments regarding the properties and fate of the first WIMPy halos.

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