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Decay of High-Energy Astrophysical Neutrinos
2003
Physical Review Letters
Existing limits on the non-radiative decay of one neutrino to another plus a massless particle (e.g., a singlet Majoron) are very weak. The best limits on the lifetime to mass ratio come from solar neutrino observations, and are τ/m 10^-4 s/eV for the relevant mass eigenstate(s). For lifetimes even several orders of magnitude longer, high-energy neutrinos from distant astrophysical sources would decay. This would strongly alter the flavor ratios from the ϕ_ν_e:ϕ_ν_μ:ϕ_ν_τ = 1:1:1 expected from
doi:10.1103/physrevlett.90.181301
pmid:12785996
fatcat:m2m6t2bc5ffdzmmamssp2dvp4y