Abstract
If the stability of the dark matter (DM) particle is due to an accidental symmetry, nothing prevents UV physics from destabilising it by inducing DM decays suppressed by powers of the UV scale. The seesaw physics, presumably at the origin of neutrino mass, could induce such a decay. We show that if the seesaw scale lies around the usual Weinberg operator scale, the induced DM decay could generically lead to neutrino lines whose intensity is of the order of the present sensitivity of neutrino telescopes. We illustrate this possibility with models in which the DM is made of the gauge boson(s) of an abelian or non-abelian gauge symmetry.
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Coy, R., Hambye, T. Neutrino lines from DM decay induced by high-scale seesaw interactions. J. High Energ. Phys. 2021, 101 (2021). https://doi.org/10.1007/JHEP05(2021)101
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DOI: https://doi.org/10.1007/JHEP05(2021)101