Abstract
Results from the ντ appearance search in a neutrino beam using the full NOMAD data sample are reported. A new analysis unifies all the hadronic τ 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 sin22θμτ-Δm2 plane which includes sin22θμτ<3.3×10-4 at large Δm2 and Δm2< 0.7 eV2/c4 at sin22θμτ=1. The corresponding contour in the νe→ντ oscillation hypothesis results in sin22θeτ<1.5×10-2 at large Δm2 and Δm2<5.9 eV2/c4 at sin22θeτ=1. We also derive limits on effective couplings of the τ lepton to νμ or νe.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3-39 |
| Number of pages | 37 |
| Journal | Nuclear Physics B |
| Volume | 611 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - Sep 17 2001 |
| Externally published | Yes |
Keywords
- Appearance
- Neutrino mass
- Neutrino oscillations
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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