Asymmetric dark matter from leptogenesis

Adam Falkowski, Joshua T. Ruderman, Tomer Volansky

    Research output: Contribution to journalArticlepeer-review

    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 10TeV. 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.

    Original languageEnglish (US)
    Article number106
    JournalJournal of High Energy Physics
    Volume2011
    Issue number5
    DOIs
    StatePublished - 2011

    Keywords

    • Beyond standard model
    • Cosmology of theories beyond the SM
    • Neutrino physics

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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