Detectability of a subdominant density component of cold dark matter

Details Detectability of a subdominant density component of cold dark matter Detectability of a subdominant density component of cold dark matter

2001-02-15

arxiv.org/abs/hep-ph/0102200v3

Phys.Lett. B529 (2002) 187-192

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures (references added, minor rewriting)

Scientific paper

10.1016/S0370-2693(02)01266-2

Here we examine the detectability of collisionless dark matter candidates that may constitute not all but only a subdominant component of galactic cold dark matter. We show that current axion searches are not suited for a subdominant component, while direct WIMP searches would not be severely affected by the reduced density. In fact, the direct detection rates of neutralinos stay almost constant even if neutralinos constitute 1% of the halo dark matter. Only for lower densities do the rates decrease with density. Even neutralinos accounting for only $10^{-4}$ of the local dark halo density are within proposed future discovery limits. We comment also on indirect WIMP searches.

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