Unified TeV Scale Picture of Baryogenesis and Dark Matter

K. S. Babu, R. N. Mohapatra, and Salah Nasri
Phys. Rev. Lett. 98, 161301 – Published 16 April 2007

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 MN100GeV and MXTeV. The scalar partner of N (denoted N˜1) 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 1010sec, (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.

  • Received 17 January 2007

DOI:https://doi.org/10.1103/PhysRevLett.98.161301

©2007 American Physical Society

Authors & Affiliations

K. S. Babu1,*, R. N. Mohapatra2,†, and Salah Nasri3,‡

  • 1Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA
  • 2Department of Physics, University of Maryland, College Park, Maryland 20742, USA
  • 3Department of Physics, University of Florida, Gainesville, Florida 32611, USA

  • *Electronic address: kaladi.babu@okstate.edu
  • Electronic address: rmohapat@physics.umd.edu
  • Electronic address: snasri@phys.ufl.edu

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Issue

Vol. 98, Iss. 16 — 20 April 2007

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