WIMPs in a 3-3-1 model with heavy Sterile neutrinos

Abstract

In this work we show that from the spectrum of particles of a 3-3-1 gauge model with heavy sterile neutrinos we can have up to three Cold Dark Matter candidates as WIMPs. We obtain their relic abundance and analyze their compatibility with recent direct detection experiments, exploring the possibility of explaining the two events reported by CDMS-II. An interesting outcome of this 3-3-1 model, concerning direct detection of two WIMPs in the model, is a strong bound on the symmetry breaking scale, which imposes it to be above 3 TeV.

26 pages, 14 figures; A new symmetry was identified in the model and a mistake was corrected which discards one of the scalars as CDM candidate but without affecting the main conclusions; The text was improved