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Determination of the muon charge sign with the dipolar spectrometers of the OPERA experiment

  • N. Agafonova
  • , A. Aleksandrov
  • , A. Anokhina
  • , S. Aoki
  • , A. Ariga
  • , T. Ariga
  • , D. Bender
  • , A. Bertolin
  • , C. Bozza
  • , R. Brugnera
  • , A. Buonaura
  • , S. Buontempo
  • , B. Büttner
  • , M. Chernyavsky
  • , A. Chukanov
  • , L. Consiglio
  • , N. D'Ambrosio
  • , G. De Lellis
  • , M. De Serio
  • , P. Del Amo Sanchez
  • A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Dracos, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Göllnitz, J. Goldberg, D. Goloubkov, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Koseg, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, M. Malenica, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, M. Meyer, S. Mikado, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, H. Rokujo, T. Roganova, G. Rosa, I. Rostovtseva, O. Ryazhskaya, O. Sato, Y. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, Y. Zaitsev, S. Zemskova, A. Zghiche
  • Institute for Nuclear Research of the Russian Academy of Sciences
  • INFN Sezione di Napoli
  • Moscow State University
  • Kobe University
  • University of Bern
  • Middle East Technical University (METU)
  • INFN
  • Sezione di Roma
  • University of Padova
  • University of Naples Federico II
  • Universität Hamburg
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • Joint Institute for Nuclear Research, Dubna
  • Laboratori Nazionali del Gran Sasso
  • INFN Sezione di Bari
  • Università degli studi di Bari Aldo Moro
  • Université Savoie Mont Blanc
  • INFN Sezione di Bologna
  • Université de Strasbourg
  • Toho University
  • University of Bologna
  • Technion - Israel Institute of Technology
  • Institute for Theoretical and Experimental Physics
  • Nagoya University
  • Ruđer Bošković Institute
  • Ankara University
  • Gyeongsang National University
  • Institute for Basic Science (IBS)
  • Aichi University of Education
  • European Organization for Nuclear Research
  • LNF-INFN
  • Sungkyunkwan University
  • National Research Nuclear University MEPhI
  • Università di Trento
  • Utsunomiya University
  • University of Milano-Bicocca
  • Université Libre de Bruxelles

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

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 originaleAnglais
Numéro d'articleP07022
journalJournal of Instrumentation
Volume11
Numéro de publication7
Les DOIs
étatPublié - 25 juil. 2016
Modification externeOui

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