par Gruwe, Magali ;Mommaert, Chantal;Vilain, Pierre ;Wilquet, Gaston ; [et al.]
Référence Physics letters. Section B, 309, 3-4, page (463-468)
Publication Publié, 1993-07
Article révisé par les pairs
Résumé : The fine granularity of the CHARM-II detector has been exploited to search, in the CERN-SPS wide band neutrino beam, for quasi-elastic ντ interactions followed by the decay τ → πντ. Since the sampling thickness of the target calorimeter corresponds to ∼ 1 9 of an interaction length, these events appear in the detector as a single track followed by a hadronic shower. The study of the "single pion" events is used to set limits on the νμ → ντ oscillation parameters. The maximum sensitivity to the mixing angle θ is reached for Δm2 = 50 eV2 allowing to exclude values of sin22θ greater than 6.4 × 10-3 at 90% CL. © 1993.