A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is
Physics Letters B
Active galactic nuclei and gamma ray bursts at cosmological distances are sources of high-energy electron and muon neutrinos and provide a unique test bench for neutrino instability. The typical lifetime-to-mass ratio one can reach there is τ/m∼ 500 Mpc/cE_ν∼ 500 s/eV. We study the rapid decay channel ν_i→ν_j+ϕ, where ϕ is a massless or very light scalar (possibly a Goldstone boson), and point out that one can test the coupling strength of g_ijν_iν_j down to g_ij 10^-8 eV/m by measuring thedoi:10.1016/s0370-2693(99)00862-x fatcat:pxop23337rb7nfbajbux3mxz3q