title: Unified TeV scale picture of baryogenesis and dark matter.
abstract: We present a simple extension of the minimal supersymmetric standard model which provides a unified picture of cosmological baryon asymmetry and dark matter. Our model introduces a gauge singlet field N and a color triplet field X which couple to the right-handed quark fields. The out-of-equilibrium decay of the Majorana fermion N mediated by the exchange of the scalar field X generates adequate baryon asymmetry for MN approximately 100 GeV and MX approximately TeV. The scalar partner of N (denoted N1) is naturally the lightest SUSY particle as it has no gauge interactions and plays the role of dark matter. The model is experimentally testable in (i) neutron-antineutron oscillations with a transition time estimated to be around 10(10)sec, (ii) discovery of colored particles X at LHC with mass of order TeV, and (iii) direct dark matter detection with a predicted cross section in the observable range.
authors.affiliation: Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA. kaladi.babu@okstate.edu
authors.forename: K S
authors.initials: KS
authors.lastname: Babu
authors.forename: R N
authors.initials: RN
authors.lastname: Mohapatra
authors.forename: Salah
authors.initials: S
authors.lastname: Nasri