The OPERA experiment in the CERN to Gran Sasso neutrino beam

Acquafredda, R.; Adam, Thomas; Agafonova, N.; Sanchez, P. Alvarez; Ambrosio, M.; Anokhina, A.; Aoki, Shigeki; Ariga, A.; Ariga, T.; Arrabito, L.; Aufranc, C.; Autiero, D.; Badertscher, A.; Bagulya, A.; Baussan, E.; Bergnoli, Antonio; Greggio, F. Bersani; Bertolin, A.; Besnier, M.; Biaré, D.; Bick, D.; Blin, Sylvie; Borer, K.; Boucrot, J.; Boutigny, D.; Boyarkin, V. V.; Bozza, C.; Brugière, T.; Brugnera, R.; Brunetti, G.; Buontempo, S.; Campagne, Jean-Eric; Carlus, B.; Carrara, E.; Cazes, A.; Chaussard, L.; Chernyavsky, M.; Chiarella, V.; Chon-Sen, N.; Chukanov, A.; Ciesielski, R.; Consiglio, L.; Cozzi, M.; D'Amato, G.; Corso, F. Dal; D’Ambrosio, N.; Damet, J.; Taille, C. De La; DeLellis, G.; Déclais, Y.; Descombes, T.; Deserio, M.; Capua, F. Di; Ferdinando, D. Di; Giovanni, A. Di; Marco, N. Di; Troia, C. Di; Dick, N.; Dmitrievski, S.; Dominjon, A.; Dracos, M.; Duchesneau, D.; Dulach, B.; Dusini, S.; Ebert, J.; Efthymiopoulos, I.; Egorov, O. K.; Elsener, K.; Enikeev, R. I.; Ereditato, A.; Esposito, L. S.; Fanin, C.; Favier, Jean; Felici, G.; Ferber, T.; Fini, R. A.; Fournier, L.; Franceschi, A.; Frekers, D.; Fukuda, Tsutomu; Fukushima, C.; Галкин, В. И.; Галкин, В. А.; Gallet, R.; Gardien, S.; Garfagnini, A.; Gaudiot, G.; Giacomelli, G.; Giorgini, M.; Girerd, C.; Goellnitz, C.; Goeltzenlichter, T.; Goldberg, J.; Golubkov, D.; Gornushkin, Y.; Grapton, J.-N.; Grella, G.; Grianti, F.; Gschwendtner, Edda; Guérin, C.; Güler, M.; Gustavino, C.; Guyonnet, J.L.; Hagner, C.; Hamane, T.; Hara, T.; Hauger, M.; Heß, M.; Hierholzer, M.; Hoshino, K.; Ieva, M.; Incurvati, M.; Jakovčić, K.; Csáthy, J. Janicskó; Janutta, B.; Jollet, C.; Juget, F.; Kazuyama, M.; Kim, S. H.; Khovansky, N.N.; Kimura, Mitsuhiro; Kliček, B.; Knuesel, J.; Kodama, K.; Kolev, D.; Komatsu, M.; Köse, U.; Krasnoperov, A.; Kreslo, I.; Krumstein, Z.; Kutsenov, V. V.; Kuznetsov, A. Zh.; Laktineh, Imad Baptiste; Lavy, M.; Lazzaro, C.; Lê, T.D.; Flour, T. Le; Lenkeit, J.; Lewis, J.; Lieunard, S.; Ljubičić, A.; Longhin, A.; Lutter, G.; Malgin, A. S.; Manai, K.; Mandrioli, G.; Marotta, Anna; Marteau, J.; Martin-Chassard, Gisèle; Matveev, V.; Mauri, N.; Meddahi, M.; Meisel, Frank; Meregaglia, A.; Meschini, A.; Messina, M.; Migliozzi, P.; Monacelli, P.; Monteiro, Inocencio; Moreau, F.; Morishima, Keisuke; Moser, U.; Muciaccia, M. T.; Mugnier, P.; Naganawa, N.; Nakamura, Mitsuhiro; Nakano, T.; Napolitano, T.; Nikitina, V.; Niwa, K.; Nonoyama, Y.; Nozdrin, A.; Ogawa, S.; Olchevski, A. G.; Orlandi, D.; Orlova, G. I.; Оседло, В. И.; Ossetski, D.; Paniccia, M.; Paoloni, A.; Park, B. D.; Park, I. G.; Pastore, A.; Patrizii, L.; Pellegrino, L.; Pennacchio, E.; Pessard, H.; Pilipenko, V. V.; Pistillo, C.; Polukhina, N.; Pozzato, M.; Pretzl, K.; Publichenko, P. A.; Pupilli, F.; Raux, L.; Repellin, J. P.; Rescigno, R.; Rizhikov, D.; Роганова, Т. М.; Romano, G.; Rosa, G. De; Rostovtseva, I.; Rubbia, A.; Russo, A.; Ryasny, V. G.; Ryazhskaya, O. G.; Sadovski, A.; Sanelli, C.; Sato, Osamu; Sato, Y.; Saveliev, V.; Sazhina, G. P.; Schembri, Adam; Parzefall, W. Schmidt; Schroeder, H.; Schütz, H. U.; Schuler, J.; Lavina, L. Scotto; Serrano, J.; Shibuya, H.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Song, J.; Spinetti, M.; Stančo, L.; Старков, Н. И.; Stipčević, M.; Strauss, T.; Strolin, P.; Sugonyaev, Valentin; Takahashi, Satoru; Talochkin, V. P.; Tenti, M.; Tereschenko, V.; Terranova, F.; Tezuka, I.; Tioukov, V.; Tolun, P.; Царев, В. А.; Tsenov, R.; Tufanli, S.; Ugolino, U.; Ushida, N.; Beek, G. Van; Verguilov, V.; Viant, T.; Vilain, P.; Vladimirov, M. S.; Votano, L.; Vuilleumier, J. L.; Waelchli, T.; Weber, M.; Wilquet, G.; Wonsak, B.; Wurtz, Jacques; Yakushev, V. F.; Yoon, C. S.; Zaitsev, Yu.; Zghiche, A.; Zimmermann, R.

doi:10.1088/1748-0221/4/04/p04018

Cited by 258 publications

(190 citation statements)

References 83 publications

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“…The OPERA neutrino experiment [1] reported in 2011 the observation of an anomalous value of the CNGS muon neutrino time-of-flight which could be interpreted in terms of superluminal propagation [2]. Continuing carefully to scrutinize the measurement, two unaccounted systematic effects significantly affecting the result were found by the Collaboration.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the neutrino velocity with the OPERA detector in the CNGS beam using the 2012 dedicated data

Adam¹,

Agafonova²,

Aleksandrov³

et al. 2013

J. High Energ. Phys.

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In spring 2012 CERN provided two weeks of a short bunch proton beam dedicated to the neutrino velocity measurement over a distance of 730 km. The OPERA neutrino experiment at the underground Gran Sasso Laboratory used an upgraded setup compared to the 2011 measurements, improving the measurement time accuracy. An independent timing system based on the Resistive Plate Chambers was exploited providing a time accuracy of ∼1 ns. Neutrino and anti-neutrino contributions were separated using the information provided by the OPERA magnetic spectrometers. The new analysis profited from the precision geodesy measurements of the neutrino baseline and of the CNGS/LNGS clock synchronization. The neutrino arrival time with respect to the one computed assuming the speed of light in vacuum is found to be δt ν ≡ T OF c − T OF ν = (0.6±0.4 (stat.)±3.0 (syst.)) ns and δtν ≡ T OF c −T OFν = (1.7±1.4 (stat.)±3.1 (syst.)) ns for ν µ andν µ , respectively. This corresponds to a limit on the muon neutrino velocity with respect to the speed of light of −1.8 × 10 −6 < (v ν − c)/c < 2.3 × 10 −6 at 90% C.L. This new measurement confirms with higher accuracy the revised OPERA result.

show abstract

Section: Introductionmentioning

confidence: 99%

Measurement of the neutrino velocity with the OPERA detector in the CNGS beam using the 2012 dedicated data

Adam¹,

Agafonova²,

Aleksandrov³

et al. 2013

J. High Energ. Phys.

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show abstract

“…Therefore, in the following we consider the emulsion films used for the OPERA target [435]. Each film has transverse dimensions 10 × 13 cm 2 and consists of a 44 µm thick emulsion layer on both sides of a 205 µm thick triacetyl cellulose (TAC) base.…”

Section: Emulsion Detectormentioning

confidence: 99%

Interim Design Report

Abrams¹,

Agarwalla²,

Alekou³

et al. 2011

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“…In the OPERA experiment [8] a cross-sectional area of the order of 70 m 2 with a rather uniform field was chosen as a good compromise between needs and costs. The CERN to Gran Sasso (CNGS) muon-neutrino beam [9] has an average energy of 17 GeV.…”

Section: Introductionmentioning

confidence: 99%

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

Agafonova

Brugnera

Marco³

et al. 2016

J. Inst.

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The OPERA long-baseline neutrino-oscillation experiment has observed the direct appearance of ν τ in the CNGS ν µ beam. Two large muon magnetic spectrometers are used to identify muons produced in the τ leptonic decay and in ν µ 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 ν µ 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.

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The OPERA experiment in the CERN to Gran Sasso neutrino beam

Cited by 258 publications

References 83 publications

Measurement of the neutrino velocity with the OPERA detector in the CNGS beam using the 2012 dedicated data

Measurement of the neutrino velocity with the OPERA detector in the CNGS beam using the 2012 dedicated data

Interim Design Report

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

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