Light Dark Matter from Forbidden Channels

Raffaele Tito D'Agnolo, Joshua T. Ruderman

    Research output: Contribution to journalArticlepeer-review


    Dark matter (DM) may be a thermal relic that annihilates into heavier states in the early universe. This forbidden DM framework accommodates a wide range of DM masses from keV to weak scales. An exponential hierarchy between the DM mass and the weak scale follows from the exponential suppression of the thermally averaged cross section. Stringent constraints from the cosmic microwave background are evaded because annihilations turn off at late times. We provide an example where DM annihilates into dark photons, which is testable through large DM self-interactions and direct detection.

    Original languageEnglish (US)
    Article number061301
    JournalPhysical Review Letters
    Issue number6
    StatePublished - Aug 3 2015

    ASJC Scopus subject areas

    • General Physics and Astronomy


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