Résumé
The OPERA long-baseline neutrino-oscillation experiment has observed the direct appearance of ντ in the CNGS νμ beam. Two large muon magnetic spectrometers are used to identify muons produced in the τ leptonic decay and in νμ CC interactions by measuring their charge and momentum. Besides the kinematic analysis of the τ decays, background resulting from the decay of charmed particles produced in νμ CC interactions is reduced by efficiently identifying the muon track. A new method for the charge sign determination has been applied, via a weighted angular matching of the straight track-segments reconstructed in the different parts of the dipole magnets. Results obtained for Monte Carlo and real data are presented. Comparison with a method where no matching is used shows a significant reduction of up to 40% of the fraction of wrongly determined charges.
| langue originale | Anglais |
|---|---|
| Numéro d'article | P07022 |
| journal | Journal of Instrumentation |
| Volume | 11 |
| Numéro de publication | 7 |
| Les DOIs | |
| état | Publié - 25 juil. 2016 |
| Modification externe | Oui |
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