Abstract
With additional data and improved algorithms, we have enhanced the sensitivity of our appearance search for vμ → vτ oscillations in the NOMAD detector in the CERN-SPS wide-band neutrino beam. The search uses kinematic criteria to identify vτ charged current interactions followed by decay of the τ- to one of several decay modes. Our "blind" analyses of deep-inelastic scattering data taken in 1996 and 1997, combined with consistent reanalyses of previously reported 1995 data, yield no oscillation signal. For the two-family oscillation scenario, we present the contour outlining a 90% C.L. confidence region in the sin22θμτ-Δm2plane. At large Δm2, the confidence region includes sin22θμτ <1.2 × 10-3 (a limit 3.5 times more stringent than in our previous publication), while at sin22θμτ = 1, the confidence region includes Δm2 < 1.2 eV2/c4.
Original language | English (US) |
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Pages (from-to) | 169-186 |
Number of pages | 18 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 453 |
Issue number | 1-2 |
DOIs | |
State | Published - 1999 |
Externally published | Yes |
Keywords
- Neutrino oscillations
ASJC Scopus subject areas
- Nuclear and High Energy Physics