Particle Dark Matter
Abstract
Description
Several lines of evidence suggest that some of the dark matter may be non-baryonic: the non-detection of various plausible baryonic candidates for dark matter inferred, e.g., from galaxy rotation curves and from cluster of galaxy velocity dispersions, the need for non-baryonic dark matter for theoretical models of galaxy formation, and the large discrepancy between dynamical measurements implying $Ω_0 > 0.2$ and the baryon abundance inferred from big bang nucleosynthesis, $Ω_b h^2 = 0.015$. There are a number of well-motivated dark matter candidates: massive neutrinos, supersymmetric dark matter and ``invisible'' axions. Many of these dark matter candidates are potentially detectable by the current generation of dark matter experiments.
19 pages, Latex, To appear in "Some Outstanding Questions in Astrophysics", edited by J.N. Bahcall \& J.P. Ostriker
19 pages, Latex, To appear in "Some Outstanding Questions in Astrophysics", edited by J.N. Bahcall \& J.P. Ostriker