ArXiv preprint: New Constraints on Neutrino Velocities
[W]e show that such superluminal neutrinos would lose energy rapidly via the bremsstrahlung of electron-positron pairs (\(nurightarrow nu+e^-+e^+\)). For the claimed superluminal neutrino velocity and at the stated mean neutrino energy, we find that most of the neutrinos would have suffered several pair emissions en route, causing the beam to be depleted of higher energy neutrinos. Thus we refute the superluminal interpretation of the OPERA result.
One more part of the puzzle.
via Bob Park’s What’s New