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Determination of the muon charge sign with the dipolar spectrometers of the OPERA experimentстатья Электронная публикация
- Авторы: Agafonova N., Aleksandrov A., Anokhina A., Dzhatdoev T., Okateva N., Podgrudkov D., Roganova T.M., OPERA Collaboration
- Журнал: https://arxiv.org/
- Номер: 1404.5933
- Год издания: 2016
- Первая страница: 1
- Последняя страница: 10
- Аннотация: 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 νCCμ 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 νCCμ 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.
- Добавил в систему: Анохина Анна Михайловна