Lepton Pair Čerenkov Radiation Emitted by Tachyonic Neutrinos: Lorentz-Covariant Approach and IceCube Data

Figure 3

The world line describes the tachyonic neutrino decay into a zero-energy, infinitely fast neutrino. Complete reversal of the time ordering of the decay process takes place in the primed frame; the observer interprets the process as the decay of an incoming antineutrino along the trajectory .