  A recent measurement of neutrino velocity by the OPERA experiment and
prediction of energy loss of superluminal neutrino via the pair creation
process $\nu\to \nu e^+e^-$ stimulated a search of isolated $e^+e^-$ pairs in
detectors with good tracking capability traversed by a large flux of high
energy neutrino like NOMAD. NOMAD has already searched for similar topologies.
These results can be reinterpreted to provide stringent limits on special
relativity violating parameters separately for each $\nu$ species.
