Displaced vertices from X-ray lines

Adam Falkowski, Yonit Hochberg, Joshua T. Ruderman

    Research output: Contribution to journalArticlepeer-review


    Abstract: We present a simple model of weak-scale thermal dark matter that gives rise to X-ray lines. Dark matter consists of two nearly degenerate states near the weak scale, which are populated thermally in the early universe via co-annihilation with slightly heavier states that are charged under the Standard Model. The X-ray line arises from the decay of the heavier dark matter component into the lighter one via a radiative dipole transition, at a rate that is slow compared to the age of the universe. The model predicts observable signatures at the LHC in the form of exotic events with missing energy and displaced leptons and jets. As an application, we show how this model can explain the recently observed 3.55 keV X-ray line.

    Original languageEnglish (US)
    Article number140
    JournalJournal of High Energy Physics
    Issue number11
    StatePublished - Nov 2014


    • Beyond Standard Model
    • Cosmology of Theories beyond the SM

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


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