Final NOMAD results on muon-neutrino ---> tau-neutrino and electron-neutrino ---> tau-neutrino oscillations including a new search for tau-neutrino appearance using hadronic tau decays.
Results from the ?t appearance search in a neutrino beam using the full NOMAD data sample are reported. A new analysis unifies all the hadronic t decays, significantly improving the overall sensitivity of the experiment to oscillations. The “blind analysis” of all topologies yields no evidence for an oscillation signal. In the two-family oscillation scenario, this sets a 90% CL allowed region in the sin22?µt–?m2 plane which includes sin22?µt<3.3×10-4 at large ?m2 and ?m2< 0.7 eV2/c4 at sin22?µt=1. The corresponding contour in the ?e??t oscillation hypothesis results in sin22?et<1.5×10-2 at large ?m2 and ?m2<5.9 eV2/c4 at sin22?et=1. We also derive limits on effective couplings of the t lepton to ?µ or ?e
