We consider DM that only couples to SM gauge bosons and fills one gauge multiplet, e.g., a fermion 5-plet (which is automatically stable), or a wino-like 3-plet. We revisit the computation of the cosmological relic abundance including non-perturbative corrections. The predicted mass of, e.g., the 5-plet increases from 4.4 to 10 TeV, and indirect detection rates are enhanced by 7 orders of magnitude. Next, we show that due to the quasi-degeneracy among neutral and charged components of the DM multiplet, a significant fraction of DM with energy E greater than or similar to 10(17) eV (possibly present among ultra-high energy cosmic rays) can cross the Earth exiting in the charged state and may in principle be detected in neutrino telescopes. (C) 2007 Elsevier B.V. All rights reserved.
Autori interni: | |
Autori: | Cirelli M; Strumia A; Tamburini M |
Titolo: | Cosmology and astrophysics of minimal dark matter |
Anno del prodotto: | 2007 |
Digital Object Identifier (DOI): | 10.1016/j.nuclphysb.2007.07.023 |
Appare nelle tipologie: | 1.1 Articolo in rivista |