2006/12/31 by K. S. Babu, Rabindra N. Mohapatra, R. N. Mohapatra +2 · 2 citations
Physics and Astronomy · #Astrophysics #Baryogenesis #Baryon asymmetry #Baryon number #Cosmology #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Fermion #Gauge (firearms) #Lepton #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Proton decay #Quark #Scalar field dark matter #Standard Model (mathematical formulation) #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevlett.98.161301
published as Phys.Rev.Lett.98:161301,2007 · 10 pages, one reference updated. Version to appear in Phys. Rev. Lett
arxiv created 2007/03/25 · openalex publication_date 2007/04/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.