The most sensitive channel for NOMAD is the electronic channel, since the background from electron-neutrino interactions is the lowest. NOMAD uses kinematic criteria in the transverse plane to the direction of the neutrino to recognize the tau particle. In a normal electron-neutrino interaction the spray of hadrons from the nucleus is in the opposite direction to the electron in the transverse plane. For a tau decay, since there are two extra neutrinos in the deacy that are not observed by NOMAD, the electron is not always back-to-back to the hadronic jet in the transverse plane.

Below, one can see two examples of interactions observed inside the NOMAD volume, one of them is the common muon-neutrino charged current interaction and the other is a relatively rare electron-antineutrino charged current interaction (only 0.3% of the neutrinos in the beam are of this type).

No tau candidates have been found with the preliminary analyses carried out by NOMAD using only the data taken during 1995 (we have data from 1996 and 1997 which has not been analysed yet). The limit obtained is:

Alternatively, we have performed a search for muon to electron-neutrino oscillations by searching for an excess in electron-neutrino events from what we would expect from our knowledge of the neutrino beam. Improvements in our understanding of the beam will come from the knowledge of the SPY results which will reduce the systematic error of this result. This result rules out a large portion of the parameter space claimed by the LSND experiment to be due to muon-antineutrino to electron-antineutrino oscillations.