Decaying Dark Matter Baryons in a Composite Messenger Model
arXiv:0811.0737 · doi:10.1016/j.physletb.2009.03.025
Abstract
A baryonic bound state with a mass of O(100) TeV, which is composed of strongly interacting messenger quarks in the low scale gauge mediation, can naturally be the cold dark matter. Interestingly, we find that such a baryonic dark matter is generically metastable, and the decay of this dark matter can naturally explain the anomalous positron flux recently observed by the PAMELA collaboration.
10 pages, 2 figures. v2: minor changes, note added