Neutrino lines from majoron dark matter
Abstract
Models with spontaneously broken global lepton number can lead to a pseudo-Goldstone boson as a long-lived dark matter candidate. Here we revisit the case of singlet majoron dark matter and discuss multiple constraints. For masses above MeV, this model could lead to a detectable flux of monochromatic mass-eigenstate neutrinos, which have flavor ratios that depend strongly on the neutrino mass hierarchy. We provide a convenient parametrization for the loop-induced majoron couplings to charged fermions that allows us to discuss three-generation effects such as lepton flavor violation. These couplings are independent of the low-energy neutrino parameters but can be constrained by the majoron decays into charged fermions.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- May 2017
- DOI:
- 10.1007/JHEP05(2017)102
- arXiv:
- arXiv:1701.07209
- Bibcode:
- 2017JHEP...05..102G
- Keywords:
-
- Neutrino Physics;
- Cosmology of Theories beyond the SM;
- Global Symmetries;
- High Energy Physics - Phenomenology;
- Astrophysics - High Energy Astrophysical Phenomena;
- High Energy Physics - Experiment
- E-Print:
- 14 pages