The detection of neutrino interactions in the emulsion/lead target of the OPERA experiment

Agafonova, N.; Anokhina, A.; Aoki, Shigeki; Ariga, A.; Ariga, T.; Arrabito, L.; Autiero, D.; Badertscher, A.; Bagulya, A.; Greggio, F. Bersani; Bertolin, A.; Besnier, M.; Bick, D.; Boyarkin, V. V.; Bozza, C.; Brugière, T.; Brugnera, R.; Brunetti, G.; Buontempo, S.; Carrara, E.; Cazes, A.; Chaussard, L.; Chernyavsky, M.; Chiarella, V.; Chon-Sen, N.; Chukanov, A.; Cozzi, M.; D'Amato, G.; Corso, F. Dal; D’Ambrosio, N.; Lellis, G. De; Déclais, Y.; Serio, M. De; Capua, F. Di; Ferdinando, D. Di; Giovanni, A. Di; Marco, N. Di; Troia, C. Di; Dmitrievski, S.; Dominjon, A.; Dracos, M.; Duchesneau, D.; Dusini, S.; Ebert, J.; Egorov, O. K.; Enikeev, R. I.; Ereditato, A.; Esposito, L. S.; Favier, Jean; Felici, G.; Ferber, T.; Fini, R. A.; Frekers, D.; Fukuda, Tsutomu; Fukushima, C.; Галкин, В. И.; Галкин, В. А.; Garfagnini, A.; Giacomelli, G.; Giorgini, M.; Goellnitz, C.; Goeltzenlichter, T.; Goldberg, J.; Golubkov, D.; Gornushkin, Y.; Grella, G.; Grianti, F.; Güler, M.; Gustavino, C.; Hagner, C.; Hamada, K.; Hara, T.; Hierholzer, M.; Hoshino, K.; Ieva, M.; Jakovčić, K.; Janutta, B.; Jollet, C.; Juget, F.; Kazuyama, M.; Kim, S. H.; Kimura, Mitsuhiro; Kitagawa, N.; Kliček, B.; Knuesel, J.; Kodama, K.; Kolev, D.; Komatsu, M.; Köse, U.; Krasnoperov, A.; Kreslo, I.; Krumstein, Z.; Kubota, H.; Kutsenov, V. V.; Kuznetsov, V. A.; Laktineh, Imad Baptiste; Lazzaro, C.; Lenkeit, J.; Ljubičić, A.; Longhin, A.; Lutter, G.; Malgin, A. S.; Manai, K.; Mandrioli, G.; Marotta, Anna; Marteau, J.; Matsuo, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meisel, Frank; Meregaglia, A.; Messina, M.; Migliozzi, P.; Miyamoto, Seigo; Monacelli, P.; Morishima, Keisuke; Moser, U.; Muciaccia, M. T.; Naganawa, N.; Naka, Takashi; Nakamura, Mitsuhiro; Nakano, T.; Nikitina, V.; Niwa, K.; Nonoyama, Y.; Nozdrin, A.; Ogawa, S.; Olchevski, A. G.; Orlova, G. I.; Оседло, В. И.; Ossetski, D.; Paniccia, M.; Paoloni, A.; Park, B. D.; Park, I. G.; Pastore, A.; Patrizii, L.; Pennacchio, E.; Pessard, H.; Pilipenko, V. V.; Pistillo, C.; Polukhina, N.; Pozzato, M.; Pretzl, K.; Publichenko, P. A.; Pupilli, F.; 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.; Sato, Osamu; Sato, Y.; Saveliev, V.; Schembri, Adam; Parzefall, W. Schmidt; Schroeder, H.; Schütz, H. U.; Schuler, J.; Lavina, L. Scotto; 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; Tereschenko, V.; Terranova, F.; Tezuka, I.; Tioukov, V.; Tolun, P.; Царев, В. А.; Tsenov, R.; Tufanli, S.; Ushida, N.; Verguilov, V.; Vilain, P.; Vladimirov, M. S.; Votano, L.; Vuilleumier, J. L.; Wilquet, G.; Wonsak, B.; Yakushev, V. F.; Yoon, C. S.; Yoshioka, T.; Yoshida, Junshi; Zaitsev, Yu.; Zghiche, A.; Zimmermann, R.

doi:10.1088/1748-0221/4/06/p06020

Cited by 56 publications

(33 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In OPERA, CNGS neutrinos interacted in a massive target made of lead plates interspaced with nuclear emulsion films acting as high accuracy tracking devices [16]. This kind of detector is historically called Emulsion Cloud Chamber (ECC).…”

Section: Detector Beam and Data Samplementioning

confidence: 99%

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2015

J. High Energ. Phys.

View full text Add to dashboard Cite

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beamThe OPERA collaboration E-mail: alessandro.paoloni@lnf.infn.it, alessandra.pastore@ba.infn.it Abstract: The OPERA experiment, exposed to the CERN to Gran Sasso ν µ beam, collected data from 2008 to 2012. Four oscillated ν τ Charged Current interaction candidates have been detected in appearance mode, which are consistent with ν µ → ν τ oscillations at the atmospheric ∆m 2 within the "standard" three-neutrino framework. In this paper, the OPERA ν τ appearance results are used to derive limits on the mixing parameters of a massive sterile neutrino. The OPERA collaboration 11 IntroductionThe OPERA experiment [1] operated in the CERN Neutrinos to Gran Sasso (CNGS) beam produced at CERN and directed towards the Gran Sasso Underground Laboratory of INFN (LNGS), 730 km away, where the detector is located. The experiment is unique in its capability to observe ν τ appearance on an event-by-event basis. Nuclear emulsion films instrumenting the target allow the detection of the short-lived τ lepton decay, and hence the identification of ν τ Charged Current (CC) interactions. The standard three-neutrino oscillation framework predicts ν µ → ν τ oscillations with close-to-maximal mixing at the so-called atmospheric scale, ∆m 2 32 ∼ 2.4 × 10 −3 eV 2 [2], i.e. in the oscillation parameters region discovered by detecting atmospheric neutrinos [3]. OPERA has observed four ν τ CC interaction candidate events [4][5][6][7], consistent with the expectation of the standard oscillation framework at this scale. This result represents the first direct evidence of ν µ → ν τ oscillation in appearance mode.In the present paper, limits are derived on the existence of a massive sterile neutrino. The excess of ν e (ν e ) observed by the LSND [8] and MiniBooNE [9] collaborations and the so-called reactor [10] and Gallium [11,12] neutrino anomalies are also interpreted as due to the existence of a fourth sterile neutrino with mass at the eV scale. In relation to this issue, it is worth mentioning that the effective number of neutrino-like species decoupled from the primeval plasma measured by the Planck collaboration is 3.15 ± 0.23 at 95% Confidence Level (CL) [13].Neutrino oscillations at large ∆m 2 have been searched for by several short baseline experiments. The most stringent limits on ν µ → ν τ oscillations were set by the NOMAD [14] and CHORUS [15] experiments, with high sensitivity for ∆m 2 values larger than 10 eV 2 .In the following, a short description of the OPERA experimental setup and of the procedure used to detect ν τ interactions is given, the data analysis is described and exclusion regions in the parameter space are derived.

show abstract

Section: Detector Beam and Data Samplementioning

confidence: 99%

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2015

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…The detection of the first CNGS neutrino interactions in OPERA was reported in [37,38] and the observation of a first ν τ candidate event was presented in [39], using a sample corresponding to 1.9 × 10 19 protons on target (pot). An update based on the data collected in years 2008-09 (4.88 × 10 19 pot) was presented in [40].…”

Section: Introductionmentioning

confidence: 99%

New results on ν μ → ν τ appearance with the OPERA experiment in the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2013

J. High Energ. Phys.

View full text Add to dashboard Cite

Abstract:The OPERA neutrino experiment is designed to perform the first observation of neutrino oscillations in direct appearance mode in the ν µ → ν τ channel, via the detection of the τ -leptons created in charged current ν τ interactions. The detector, located in the underground Gran Sasso Laboratory, consists of an emulsion/lead target with an average mass of about 1.2 kt, complemented by electronic detectors. It is exposed to the CERN Neutrinos to Gran Sasso beam, with a baseline of 730 km and a mean energy of 17 GeV. The observation of the first ν τ candidate event and the analysis of the 2008-2009 neutrino sample have been reported in previous publications. This work describes substantial improvements in the analysis and in the evaluation of the detection efficiencies and backgrounds using new simulation tools. The analysis is extended to a sub-sample of 2010 and 2011 data, resulting from an electronic detector-based pre-selection, in which an additional ν τ candidate has been observed. The significance of the two events in terms of a ν µ → ν τ oscillation signal is of 2.40σ.

show abstract

“…Well-known examples of the use of advanced databases in high-energy physics are represented by SPIRES (Bourne et al, 2003), OPERA (Agafonova et al, 2009) and !CHAOS (Bisegni, 2012) and is consolidated practice their adoption as a storage medium in the ground segment.…”

Section: Using Dbmsmentioning

confidence: 99%

Non Relational Models for the Management of Large Amount of Astronomical Data

Martino¹,

Federici

2015

APP

View full text Add to dashboard Cite

The objective of this paper is the comparison between two different database typologies: the relational and the nonrelational architecture, in the context of the applications related to the use and distribution of astronomical data. The specific context is focused to problems quite different from those related to administrative and managerial environments within which were developed the leading technologies on which are based the modern systems of massive storage of data. The data provided by astronomical instrumentation are usually filtered out by the front-end system (trigger, anticoincidence, DSP etc.), so they do not require special controls of congruence. Moreover, the related storage systems must be able to ensure an easy growth, minimizing human systemistic interventions and automating the related actions. The use of a non-relational architecture (NoSQL), offers great advantages during the insertion of informations within a data base, while the response speed of the queries is mainly tied to their type and complexity.

show abstract

The detection of neutrino interactions in the emulsion/lead target of the OPERA experiment

Cited by 56 publications

References 32 publications

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

New results on ν μ → ν τ appearance with the OPERA experiment in the CNGS beam

Non Relational Models for the Management of Large Amount of Astronomical Data

Contact Info

Product

Resources

About