  It is generally held that neutrinos with superluminal velocity will lose
their energy spontaneously by radiating electron-positron pairs, similar to
bremsstrahlung process. Recently, this process was closely studied for
neutrinos whose energy is roughly proportional to their momentum. Confronted
with an increasing amount of superluminal neutrino models, it is urgent to
calculate the same process for general dispersion relations. The calculation is
performed in this paper, without resorting to any nontrivial frame such as the
effective "rest frame".
