X-ray photons from late-decaying majoron dark matter

F. Bazzocchi, M. Lattanzi, S. Riemer-Sorensen, J. W. F. Valle

    Research output: Contribution to JournalArticleAcademicpeer-review


    An attractive way to generate neutrino masses as required to account for current neutrino oscillation data involves the spontaneous breaking of lepton number. The resulting majoron may pick up a mass due to gravity. If its mass lies in the kilovolt scale, the majoron can play the role of late-decaying dark matter (LDDM), decaying mainly to neutrinos. In general the majoron has also a sub-dominant decay to two photons leading to a mono-energetic emission line which can be used as a test of the LDDM scenario. We compare expected photon emission rates with observations in order to obtain model-independent restrictions on the relevant parameters. We also illustrate the resulting sensitivities within an explicit seesaw realization, where the majoron couples to photons due to the presence of a Higgs triplet. © 2008 IOP Publishing Ltd. and SISSA.
    Original languageEnglish
    Pages (from-to)013
    JournalJournal of Cosmology and Astroparticle Physics
    Issue number8
    Publication statusPublished - 2008

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