Asymmetric dark matter from leptogenesis

  • Adam Falkowski
  • Joshua T. Ruderman
  • Tomer Volansky
Article

Abstract

We present a new realization of asymmetric dark matter in which the dark matter and lepton asymmetries are generated simultaneously through two-sector leptogenesis. The right-handed neutrinos couple both to the Standard Model and to a hidden sector where the dark matter resides. This framework explains the lepton asymmetry, dark matter abundance and neutrino masses all at once. In contrast to previous realizations of asymmetric dark matter, the model allows for a wide range of dark matter masses, from keV to 10 TeV. In particular, very light dark matter can be accommodated without violating experimental constraints. We discuss several variants of our model that highlight interesting phenomenological possibilities. In one, late decays repopulate the symmetric dark matter component, providing a new mechanism for generating a large annihilation rate at the present epoch and allowing for mixed warm/cold dark matter. In a second scenario, dark matter mixes with the active neutrinos, thus presenting a distinct method to populate sterile neutrino dark matter through leptogenesis. At late times, oscillations and dark matter decays lead to interesting indirect detection signals.

Keywords

Beyond Standard Model Cosmology of Theories beyond the SM Neutrino Physics 

Copyright information

© SISSA, Trieste, Italy 2011

Authors and Affiliations

  • Adam Falkowski
    • 1
  • Joshua T. Ruderman
    • 2
  • Tomer Volansky
    • 3
    • 4
  1. 1.Laboratoire de Physique Théorique d’Orsay, UMR8627-CNRSUniversité Paris-SudOrsay CedexFrance
  2. 2.Department of PhysicsPrinceton UniversityPrincetonU.S.A.
  3. 3.Berkeley Center for Theoretical Physics, Department of PhysicsUniversity of CaliforniaBerkeleyU.S.A.
  4. 4.Theoretical Physics GroupLawrence Berkeley National LaboratoryBerkeleyU.S.A.

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