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51. Tests of OPERA RPC detectors

Author

L.D. Esposti, C. Gustavino, A. Bergnoli, Branimir Zauner, E. Buccheri, A. Garfagnini, Alessandro Paoloni, F. Mastropietro, A. Mengucci, S. Dusini, C. Di Troia, F. Terranova, G. Felici, Luca Stanco, M. D'Incecco, E. Tatananni, G. Corradi, L. Terminiello, A. Di Giovanni, Mario Stipčević, M. Ventura, C. Fanin, F. Grianti, P. Monacelli, M. Spinetti, G. Papalino, Robert Ciesielski, A. Gorin, A. Gambarara, A. Zaytchenko, A. Candela, V. Sugonyaev, R. Brugnera, E. Borsato, N. Di Marco, A. Longhin, E. Carrara, G. Paoluzzi, Flavio Dal Corso, M. Lindozzi, L. Votano, Bergnoli, A, Borsato, E, Brugnera, R, Buccheri, E, Candela, A, Carrara, E, Ciesielski, R, Corradi, G, D'Incecco, M, Dal Corso, F, Degli Esposti, L, Di Giovanni, A, Di Marco, N, Di Troia, C, Dusini, S, Fanin, C, Felici, G, Gambarara, A, Garfagnini, A, Gorin, A, Grianti, F, Gustavino, C, Lindozzi, M, Longhin, A, Mastropietro, F, Mengucci, A, Monacelli, P, Paoloni, A, Paoluzzi, G, Papalino, G, Spinetti, M, Stanco, L, Stipcevic, M, Sugonyaev, V, Tatananni, E, Terminiello, L, Terranova, F, Ventura, M, Votano, L, Zauner, B, and Zaytchenko, A

Subjects
Physics, Nuclear and High Energy Physics, Resistive touchscreen, Resistive Plate Chambers (RPCs), Spectrometer, Nuclear engineering, OPERA, Detector, Cosmic ray, Noise (electronics), Particle detector, AGING TESTS, Nuclear physics, chemistry.chemical_compound, RESISTIVE PLATE CHAMBERS, Nuclear Energy and Engineering, chemistry, Bakelite, Electrical and Electronic Engineering, Neutrino oscillation, Nuclear and High Energy Physic
Abstract

OPERA is part of the CNGS project and it is an experiment dedicated to the observation of long-baseline νμinto ντoscillations through τ appearance. Resistive Plate Chambers (RPCs) with bakelite electrodes are used to instrument the 2 cm gaps between the magnetized iron slabs of the two spectrometers. The RPC installation ended in may 2004 on the first spectrometer and in march 2005 on the second one. Before the installation, every RPC is subjected to a complete test chain in order to reject the poorer quality detectors. The tests are performed in dedicated facilities to ensure the proper RPC gluing, to measure its electrical properties and to verify the response to cosmic rays and the intrinsic noise levels. We have also tested the long term stability of real size OPERA RPC prototypes operated at cosmic ray fluxes for more than one year. On small size prototypes we are performing studies on the gas mixtures in order to reduce the total charge released in the gas for each detector count. The validation of the installed RPCs has been performed with pure nitrogen. A small part of them has been also tested with the gas mixture Ar/C2H2F4/i - C4H10/SF6= 75.4/20/4/0.6. © 2005 IEEE.

Published
2005

52. Time resolution measurements of scintillating counters for a new NA62 trigger charged hodoscope

Author

V K Semenov, S. Kholodenko, V. D. Samoylenko, A. Khudyakov, V. Sugonyaev, V. Obraztsov, and I. Mannelli

Subjects
Physics, business.industry, Time resolution, Scintillator, Arrival time, Signal, Nuclear physics, Silicon photomultiplier, Optics, Hodoscope, Scintillation counter, Cosmic muons, business, Instrumentation, Mathematical Physics
Abstract

The results of time resolution measurements on cosmic muons with MWPC chambers as a tracking system are presented. Two options of dual SiPM readout considered: direct light collection from opposite cut corners of the scintillator and light collection using two oppositely directed bundles of WLS fibers. Two types of SiPMs are used: S10985-050C and MicroFB-60035. The best result achived using mean-time between two SiPMs. For the direct readout from 134 × 107 × 20 mm3 scintillator time resolution σ = 300±10 ps and maximum signal arrival time spread ΔT = 1.6±0.2 ns. Using WLS fiber readout option with 265 × 107 × 30 mm3 scintillator tile signal arrival time spread ΔT = 150±50 ps and time resolution σ = 370±10 ps.

Published
2014

53. The PWA ofπ−π0system in the presence of a significant irremovable background

Author

V. A. Dorofeev, A.M. Zaitsev, Dmitry Ryabchikov, V. F. Konstantinov, M. Kholodenko, A. Ivashin, A. Plekhanov, V. Nikolaenko, V. Sugonyaev, Yu.A. Khokhlov, Viktor Matveev, Yu. Salomatin, A. Ekimov, I. A. Kachaev, V. Kalendarev, M. Mikhasenko, V. Gotman, and S. Kravchenko

Subjects
Physics, QC1-999, Four-momentum, Statistical physics, Atomic physics, lcsh:Physics, lcsh:QC1-999
Abstract

7 × 106 events of the reaction π−N → π−π0N′ were collected at the VES experiment. Mass independent angular analysis is performed to study production mechanism of ρ-meson. t-channel ω-exchange and π-exchange are isolated. The analysis is done for 8 bins of a four momentum transfer squared to extract cross-section dependence of t′. Novel method of waves extraction is applied to deal with a significant irremovable background.

Published
2014

54. Search for heavy neutral lepton production in K+ decays to positrons

Author

Fabrizio Petrucci, F. Hahn, B. Jenninger, Mario Giorgi, D. Di Filippo, Leander Litov, P. Rubin, S. Padolski, Paul Laycock, Evgueni Goudzovski, S. Martellotti, Claudio Santoni, A. Filippi, G. Saracino, M. Vormstein, D. Emelyanov, B. Angelucci, L. Iacobuzio, E. B. Holzer, A. I. Zinchenko, M. Koval, Mattia Barbanera, G. Latino, M. Medvedeva, Giuseppe Ruggiero, V. Palladino, Yu. Potrebenikov, L. Bician, A. Fucci, Tommaso Spadaro, J. Swallow, Y. Petrov, Johannes Bernhard, A. Parenti, F. Spinella, H. D. Wahl, D. Coward, E. Iacopini, R. Lollini, T. Capussela, A. Gianoli, Roberto Guida, J. L. Fu, G. Lanfranchi, J. R. Fry, G. Lamanna, Ernesto Migliore, Tomáš Husek, Georgi P. Georgiev, Viacheslav Duk, T. Bache, R. W. L. Jones, A. Kleimenova, F. Costantini, Alessandro Lonardo, E. Cortina Gil, Roberto Piandani, G. Anzivino, L. Peruzzo, Andrea Biagioni, R. Volpe, L. Gatignon, M. Fiorini, M. Corvino, M. Piccini, P. F. Dalpiaz, R. Marchevski, E. Gamberini, D. T. Madigozhin, J. Jerhot, Roberto Ammendola, L. Di Lella, R. Page, V. Kozhuharov, N. A. Molokanova, A. Conovaloff, M. Misheva, M. Zamkovsky, S. Movchan, C. Lazzeroni, F. Ambrosino, D. Protopopescu, B. Velghe, J. Carmignani, A. Salamon, G. Khoriauli, R. Fantechi, Nicolas Lurkin, Matteo Lupi, F. Brizioli, A. Mefodev, M. B. Brunetti, Paolo Massarotti, M. Napolitano, B. Bloch-Devaux, V. Kurochka, Helen F Heath, I. Mannelli, Jürgen Engelfried, B. Wrona, A. Korotkova, A. Sturgess, J. B. Dainton, E. Lari, V. Cerny, H. O. Danielsson, C. Cerri, S. Trilov, Jacopo Pinzino, M. Perrin-Terrin, Vladimir Kekelidze, Luca Pontisso, Antonino Sergi, S. Schuchmann, Emilio Leonardi, A. M. Bragadireanu, I. Polenkevich, L. Federici, S. Venditti, E. Imbergamo, M. Moulson, N. Doble, A. Baeva, D. Baigarashev, Karol Kampf, V. Obraztsov, S. Ghinescu, T. Numao, Paolo Valente, Mauro Raggi, E. Pedreschi, E. Menichetti, V. E. Semenov, A. Shaikhiev, Francesco Gonnella, Rainer Wanke, M. Mirra, Tomas Blazek, Dave Britton, N. Estrada-Tristan, A. Cotta Ramusino, Yu.A. Kudenko, A. Ceccucci, Andrea Bizzeti, G. Lehmann Miotto, C. Graham, Roberta Arcidiacono, P. Petrov, Z. Kucerova, E. Gushchin, A. Khotyantsev, M. Lenti, F. Bucci, M. Boretto, V. Falaleev, F. Newson, P. Cenci, Babette Döbrich, S. Shkarovskiy, C. J. Parkinson, E. Minucci, V. Fascianelli, A. Antonelli, D. Soldi, V. Sugonyaev, R. Aliberti, A. Norton, K. Massri, J. Kunze, D. Lomidze, D. E. Hutchcroft, O. Yushchenko, V. Kurshetsov, S. Kholodenko, L. Fulton, B. Checcucci, F. Duval, P. Cooper, M. Sozzi, Ilaria Neri, Vincenzo Bonaiuto, T. Enik, Douglas Bryman, Sergei Fedotov, Vladimir Ryjov, A. Mapelli, S. Giudici, Cristina Biino, A. Romano, Fausto Sargeni, A P Ostankov, J. Henshaw, Matthew Noy, E. Maurice, F. Marchetto, Piero Vicini, P. Lichard, G. D'Agostini, M. Pepe, O. Hutanu, P. Lubrano, N. De Simone, Ambrosino, F., Corvino, M., Massarotti, P., Mirra, M., Napolitano, M., Saracino, G., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and UCL - SST/IRMP - Institut de recherche en mathématique et physique

Subjects
Astrofísica, Nuclear and High Energy Physics, Heavy neutral lepton, kaon meson, kaon decay, positron, Pontecorvo–Maki–Nakagawa–Sakata matrix, Socio-culturale, FOS: Physical sciences, NA62 experiment, 7. Clean energy, 01 natural sciences, NA62, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Positron, kaon decays, heavy neutral lepton, SM extensions, PE2_2, Big Bang nucleosynthesis, SM extensions, kaon physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, Range (particle radiation), Large Hadron Collider, kaon decays, 010308 nuclear & particles physics, hep-ex, Settore FIS/04, Heavy neutral lepton, lepton flavour violation, Física, lcsh:QC1-999, kaon meson, kaon decay, positron, Production (computer science), High Energy Physics::Experiment, kaon, lcsh:Physics, Particle Physics - Experiment, Lepton
Abstract

A search for heavy neutral lepton ($N$) production in $K^+\to e^+N$ decays using the data sample collected by the NA62 experiment at CERN in 2017--2018 is reported. Upper limits of the extended neutrino mixing matrix element $|U_{e4}|^2$ are established at the level of $10^{-9}$ over most of the accessible heavy neutral lepton mass range 144--462 MeV/$c^2$, with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The $|U_{e4}|^2$ range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/$c^2$., Comment: Version accepted for publication in Physics Letters B (28 June 2020)

55. Precision measurements with Kaon decays at CERN.

Author

Fiorenza, Renato

Subjects
KAON decay, DATA analysis, BRANCHING ratios, DECAY schemes (Radioactivity), MESONS
Abstract

The NA62 experiment at CERN collected the world's largest dataset of charged kaon decays in 2016–2018, leading to the first measurement of the branching ratio of the ultra-rare K+ → π+vv− decay, based on 20 candidates. Recent results from analyses of K+ → π0e+vγ, K+ → π+µ+µ− and K+ → π+γγ decays, using a data sample recorded in 2017-2018, are reported. Preliminary results of the first observation and analysis of the K± → π0π0µ±v decay, based on the NA48/2 data collected in 2003-2004, are also shown. [ABSTRACT FROM AUTHOR]

Published
2024
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56. Transfer Learning for Neural Network Solution of an Inverse Problem in Optical Spectroscopy.

Author

Guskov, A. A., Isaev, I. V., Burikov, S. A., Dolenko, T. A., Laptinskiy, K. A., and Dolenko, S. A.

Abstract

This study is devoted to inverse problems of optical spectroscopy that include qualitative and quantitative analysis of sample composition by its spectra. We consider the methods of optical absorption, IR absorption, and Raman spectroscopy for determining the concentrations of heavy metal ions in water. Since this problem has neither an analytical nor a direct numerical solution, practically the only way to solve it is by using approximation methods, including machine learning methods based on experimental data. Obtaining spectra is a laborious and expensive process, which makes it difficult to obtain a training sample of sufficient size. At the same time, experimental spectra are sensitive to impurities contained in water, including those of organic origin which are specific to each source. Therefore, it is not possible to create a universal training dataset with good representativity and providing a stable solution on any sample. Thus, in this paper, it is proposed to use the transfer learning approach to improve the quality of the neural network solution. The neural networks are pretrained on a basic dataset containing the spectra of solutions prepared in distilled water. Then, fine tuning and testing of the networks are carried out on specific datasets containing the spectra of solutions prepared in river water taken from different rivers. It is demonstrated that the transfer learning approach consistently provides the best results on the river water data. [ABSTRACT FROM AUTHOR]

Published
2023
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57. I.G. Persiantsev's Scientific School at the Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics: History of Development and Overview of Key Works.

Author

Dolenko, S. A.

Abstract

This article is devoted to the history of development and main research areas of the scientific school in the field of pattern recognition, image processing and analysis, and artificial intelligence and machine learning, founded in the early 1990s at the Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University (SINP MSU) by Prof. Igor' Georgievich Persiantsev. For many years Persiantsev was the permanent leader of this scientific school; he laid down the basic principles and approaches to scientific research that still guide his disciples to this day. During this time, more than 30 people became students of Persiantsev's school, who carried out scientific work under his leadership or under the leadership of his disciples, defended their candidate's dissertations or diploma at the Faculty of Physics, Lomonosov Moscow State University. The article provides a brief historical background and an overview of the areas of research and major works published over more than 30 years (from 1992 to 2023) by Persiantsev and his disciples. [ABSTRACT FROM AUTHOR]

Published
2023
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59. Improved calorimetric particle identification in NA62 using machine learning techniques.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Fedorko, W., Numao, T., Petrov, Y., Velghe, B., Wong, V. W. S., Yu, M., Bryman, D., Fu, J., Hives, Z., Husek, T., Jerhot, J., Kampf, K., and Zamkovsky, M.

Abstract

Measurement of the ultra-rare K + → π + ν ν ¯ decay at the NA62 experiment at CERN requires high-performance particle identification to distinguish muons from pions. Calorimetric identification currently in use, based on a boosted decision tree algorithm, achieves a muon misidentification probability of 1.2 × 10−5 for a pion identification efficiency of 75% in the momentum range of 15–40 GeV/c. In this work, calorimetric identification performance is improved by developing an algorithm based on a convolutional neural network classifier augmented by a filter. Muon misidentification probability is reduced by a factor of six with respect to the current value for a fixed pion-identification efficiency of 75%. Alternatively, pion identification efficiency is improved from 72% to 91% for a fixed muon misidentification probability of 10−5. [ABSTRACT FROM AUTHOR]

Published
2023
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60. A study of the K+→ π0e+νγ decay.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Wong, V. W. S., Bryman, D., Fu, J., Hives, Z., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., De Martino, B., and Perrin-Terrin, M.

Abstract

A sample of 1.3 × 105K+ → π0e+νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision. [ABSTRACT FROM AUTHOR]

Published
2023
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61. Search for dark photon decays to μ+μ− at NA62.

Author

Cortina Gil, E., Jerhot, J., Kleimenova, A., Lurkin, N., Zamkovsky, M., Numao, T., Velghe, B., Wong, V. W. S., Bryman, D., Hives, Z., Husek, T., Kampf, K., Koval, M., De Martino, B., Perrin-Terrin, M., Akmete, A. T., Aliberti, R., Di Lella, L., Doble, N., and Peruzzo, L.

Abstract

The NA62 experiment at CERN, designed to study the ultra-rare decay K+ → π+ ν ν ¯ , has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a decay volume beginning 80 m downstream. A search for dark photons decaying in flight to μ+μ− pairs is reported, based on a sample of 1.4 × 1017 protons on dump collected in 2021. No evidence for a dark photon signal is observed. A region of the parameter space is excluded at 90% CL, improving on previous experimental limits for dark photon masses between 215 and 550 MeV/c2. [ABSTRACT FROM AUTHOR]

Published
2023
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62. Addendum to: A measurement of the K+→ π+μ+μ− decay.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Wong, V. W. S., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., and Kunze, J.

Subjects
PARTICLE physics
Published
2023
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63. Innovativeness, Regulation of Vital Activity and Value Orientations of Young Men and Women: The Effect of the COVID-19 Pandemic

Author

Игорь А. Филенко, Инна В. Атаманова, and Сергей А. Богомаз

Subjects
innovativeness, creativity, risk for the sake of success, value orientations, readiness for activity, regulation of vital activity, student youth, gender differences, pandemic, network analysis, Psychology, BF1-990
Abstract

Abstract: Introduction. The pandemic was a challenge to our contemporaries and focused the attention of researchers on psychological resources that facilitate its overcoming. Empirical studies of the psychological regulation system of the personality’s vital activity during this period, reflected in the special aspects of the innovative, value and regulatory characteristics of representatives of various social groups, are quite limited, which led to the relevance and novelty of this study. Methods. The scale “Self-Assessment of Personality’s Innovative Qualities” by N. M. Lebedeva and A. N. Tatarko was used, which allows for studying the psychological components that determine innovative human behaviour. Regulatory characteristics were studied using the “Personal Readiness for Activity (PRA)” scale by S. A. Bogomaz, I. V. Atamanova and I. A. Filenko. Value orientations were determined using the Schwartz’s questionnaire “Portrait Value Questionnaire-Revised (PVQ-R)”, modified by K. V. Sugonyaev. To evaluate the studied variables concerning the pandemic influence, the authors used such criteria as a test of differences and network analysis of partial correlations using the EBICglasso regularization method. Results. The results of the study showed significant changes in several innovative, value and regulatory characteristics in the conditions of the pandemic, most of which were associated with the gender factor. The restructuring of the network structure of psychological indicators during the pandemic is going in opposite directions in groups of young men and women. The female sample shows attenuation of moderate and strong network relationships during the transition from 2019 to 2020, which means the network structure becomes more amorphous. For the male sample group, the opposite trend is observed – in 2020, initially, the amorphous network structure becomes multi-connected, structured, and clearly expressed. Discussion. The non-specific and specific effects of the pandemic on the psychological characteristics that ensure the regulation of vital activity in young men and women aged 17 to 28 years are discussed.

Published
2022
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64. Shedding light on X17: community report.

Author

Alves, Daniele S. M., Barducci, Daniele, Cavoto, Gianluca, Darmé, Luc, Delle Rose, Luigi, Doria, Luca, Feng, Jonathan L., Frankenthal, André, Gasparian, Ashot, Goudzovski, Evgueni, Gustavino, Carlo, Khalil, Shaaban, Kozhuharov, Venelin, Krasznahorkay, Attila J., Marchi, Tommaso, Meucci, Manuel, Miller, Gerald A., Moretti, Stefano, Nardecchia, Marco, and Nardi, Enrico

Subjects
COMMUNITIES, HYPOTHETICAL particles, POSITRONIUM, PROTON beams
Abstract

The workshop "Shedding light on X17" brings together scientists looking for the existence of a possible new light particle, often referred to as X17. This hypothetical particle can explain the resonant structure observed at ∼ 17 MeV in the invariant mass of electron-positron pairs, produced after excitation of nuclei such as 8 Be and 4 He by means of proton beams at the Atomki Laboratory in Debrecen. The purpose of the workshop is to discuss implications of this anomaly, in particular theoretical interpretations as well as present and future experiments aiming at confirming the result and/or at providing experimental evidence for its interpretation. [ABSTRACT FROM AUTHOR]

Published
2023
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65. A study of the K+→ π0e+νγ decay

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Wong, V. W. S., Bryman, D., Fu, J., Hives, Z., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., De Martino, B., Perrin-Terrin, M., Akmete, A. T., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., Peruzzo, L., Vormstein, M., Wanke, R., Dalpiaz, P., Fiorini, M., Mazzolari, A., Neri, I., Norton, A., Petrucci, F., Soldani, M., Wahl, H., Bandiera, L., Cotta Ramusino, A., Gianoli, A., Romagnoni, M., Sytov, A., Iacopini, E., Latino, G., Lenti, M., Lo Chiatto, P., Panichi, I., Parenti, A., Bizzeti, A., Bucci, F., Antonelli, A., Georgiev, G., Kozhuharov, V., Lanfranchi, G., Martellotti, S., Moulson, M., Spadaro, T., Tinti, G., Ambrosino, F., Capussela, T., Corvino, M., D’Errico, M., Di Filippo, D., Fiorenza, R., Giordano, R., Massarotti, P., Mirra, M., Napolitano, M., Rosa, I., Saracino, G., Anzivino, G., Brizioli, F., Imbergamo, E., Lollini, R., Piandani, R., Santoni, C., Barbanera, M., Cenci, P., Checcucci, B., Lubrano, P., Lupi, M., Pepe, M., Piccini, M., Costantini, F., Di Lella, L., Doble, N., Giorgi, M., Giudici, S., Lamanna, G., Lari, E., Pedreschi, E., Sozzi, M., Cerri, C., Fantechi, R., Pontisso, L., Spinella, F., Mannelli, I., D’Agostini, G., Raggi, M., Biagioni, A., Cretaro, P., Frezza, O., Leonardi, E., Lonardo, A., Turisini, M., Valente, P., Vicini, P., Ammendola, R., Bonaiuto, V., Fucci, A., Salamon, A., Sargeni, F., Arcidiacono, R., Bloch-Devaux, B., Boretto, M., Menichetti, E., Migliore, E., Soldi, D., Biino, C., Filippi, A., Marchetto, F., Briano Olvera, A., Engelfried, J., Estrada-Tristan, N., Reyes Santos, M. A., Boboc, P., Bragadireanu, A. M., Ghinescu, S. A., Hutanu, O. E., Bician, L., Blazek, T., Cerny, V., Kucerova, Z., Bernhard, J., Ceccucci, A., Ceoletta, M., Danielsson, H., De Simone, N., Duval, F., Döbrich, B., Federici, L., Gamberini, E., Gatignon, L., Guida, R., Hahn, F., Holzer, E. B., Jenninger, B., Koval, M., Laycock, P., Lehmann Miotto, G., Lichard, P., Mapelli, A., Marchevski, R., Massri, K., Noy, M., Palladino, V., Pinzino, J., Ryjov, V., Schuchmann, S., Venditti, S., Bache, T., Brunetti, M. B., Duk, V., Fascianelli, V., Fry, J. R., Gonnella, F., Goudzovski, E., Henshaw, J., Iacobuzio, L., Kenworthy, C., Lazzeroni, C., Lurkin, N., Newson, F., Parkinson, C., Romano, A., Sanders, J., Sergi, A., Sturgess, A., Swallow, J., Tomczak, A., Heath, H., Page, R., Trilov, S., Angelucci, B., Britton, D., Graham, C., Protopopescu, D., Carmignani, J., Dainton, J. B., Jones, R. W. L., Ruggiero, G., Fulton, L., Hutchcroft, D., Maurice, E., Wrona, B., Conovaloff, A., Cooper, P., Coward, D., Rubin, P., Baeva, A., Baigarashev, D., Emelyanov, D., Enik, T., Falaleev, V., Fedotov, S., Gorshanov, K., Gushchin, E., Kekelidze, V., Kereibay, D., Kholodenko, S., Khotyantsev, A., Korotkova, A., Kudenko, Y., Kurochka, V., Kurshetsov, V., Litov, L., Madigozhin, D., Medvedeva, M., Mefodev, A., Misheva, M., Molokanova, N., Movchan, S., Obraztsov, V., Okhotnikov, A., Ostankov, A., Polenkevich, I., Potrebenikov, Yu., Sadovskiy, A., Semenov, V., Shkarovskiy, S., Sugonyaev, V., Yushchenko, O., and Zinchenko, A.

Published
2023
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66. Search for dark photon decays to μ+μ− at NA62

Author

Cortina Gil, E., Jerhot, J., Kleimenova, A., Lurkin, N., Zamkovsky, M., Numao, T., Velghe, B., Wong, V. W. S., Bryman, D., Hives, Z., Husek, T., Kampf, K., Koval, M., De Martino, B., Perrin-Terrin, M., Akmete, A. T., Aliberti, R., Di Lella, L., Doble, N., Peruzzo, L., Schuchmann, S., Wahl, H., Wanke, R., Dalpiaz, P., Mazzolari, A., Neri, I., Petrucci, F., Soldani, M., Bandiera, L., Cotta Ramusino, A., Gianoli, A., Romagnoni, M., Sytov, A., Lenti, M., Lo Chiatto, P., Marchevski, R., Panichi, I., Ruggiero, G., Bizzeti, A., Bucci, F., Antonelli, A., Kozhuharov, V., Lanfranchi, G., Martellotti, S., Moulson, M., Spadaro, T., Tinti, G., Ambrosino, F., D’Errico, M., Fiorenza, R., Giordano, R., Massarotti, P., Mirra, M., Napolitano, M., Rosa, I., Saracino, G., Anzivino, G., Brizioli, F., Cenci, P., Duk, V., Lollini, R., Lubrano, P., Pepe, M., Piccini, M., Costantini, F., Giorgi, M., Giudici, S., Lamanna, G., Lari, E., Pedreschi, E., Pinzino, J., Sozzi, M., Fantechi, R., Spinella, F., Mannelli, I., Raggi, M., Biagioni, A., Cretaro, P., Frezza, O., Lonardo, A., Turisini, M., Vicini, P., Ammendola, R., Bonaiuto, V., Fucci, A., Salamon, A., Sargeni, F., Arcidiacono, R., Bloch-Devaux, B., Menichetti, E., Migliore, E., Biino, C., Filippi, A., Marchetto, F., Soldi, D., Briano Olvera, A., Engelfried, J., Estrada-Tristan, N., Piandani, R., Reyes Santos, M. A., Boboc, P., Bragadireanu, A. M., Ghinescu, S. A., Hutanu, O. E., Blazek, T., Cerny, V., Kucerova, Z., Volpe, R., Bernhard, J., Bician, L., Boretto, M., Ceccucci, A., Ceoletta, M., Corvino, M., Danielsson, H., Duval, F., Döbrich, B., Federici, L., Gamberini, E., Guida, R., Holzer, E. B., Jenninger, B., Lehmann Miotto, G., Lichard, P., Massri, K., Minucci, E., Noy, M., Ryjov, V., Swallow, J., Fry, J. R., Gonnella, F., Goudzovski, E., Henshaw, J., Kenworthy, C., Lazzeroni, C., Parkinson, C., Romano, A., Sanders, J., Sergi, A., Shaikhiev, A., Tomczak, A., Heath, H., Britton, D., Norton, A., Protopopescu, D., Dainton, J. B., Gatignon, L., Jones, R. W. L., Cooper, P., Coward, D., Rubin, P., Baeva, A., Baigarashev, D., Emelyanov, D., Enik, T., Falaleev, V., Fedotov, S., Gorshanov, K., Gushchin, E., Kekelidze, V., Kereibay, D., Kholodenko, S., Khotyantsev, A., Korotkova, A., Kudenko, Y., Kurochka, V., Kurshetsov, V., Litov, L., Madigozhin, D., Mefodev, A., Misheva, M., Molokanova, N., Obraztsov, V., Okhotnikov, A., Polenkevich, I., Potrebenikov, Yu., Sadovskiy, A., Shkarovskiy, S., Sugonyaev, V., and Yushchenko, O.

Published
2023
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67. A measurement of the K+→ π+μ+μ− decay.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Wong, V. W. S., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., and Kunze, J.

Abstract

A sample of 2.8 × 104K+ → π+μ+μ− candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10−8, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O (p6). [ABSTRACT FROM AUTHOR]

Published
2022
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68. Measurement of the Very Rare Decay.

Author

Zamkovsky#, Michal

Abstract

The decay , with a very precisely predicted branching ratio of less than , is among the best processes to reveal indirect effects of new physics. The NA62 experiment at CERN SPS is designed to study the decay and to measure its branching ratio using a decay-in-flight technique. NA62 took data in 2016, 2017, and 2018, reaching the sensitivity of the Standard Model for the decay by the analysis of the 2016 and 2017 data, and providing the most precise measurement of the branching ratio to date by the analysis of the 2018 data. The final result of the BR() measurement from the analysis of the full 2016–2017–2018 data set is presented, and future plans and prospects reviewed. [ABSTRACT FROM AUTHOR]

Published
2022
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69. An insight into liquid water networks through hydrogen bonding halide anion: Stimulated Raman scattering.

Author

Shenghan Wang, Wenhui Fang, Tianyu Li, Fangfang Li, Chenglin Sun, Zuowei Li, Yuxin Huang, and Zhiwei Men

Subjects
HALIDES, RAMAN scattering, HYDROGEN bonding, ANIONS, LASER plasmas
Abstract

We have studied the interaction between water molecules and halide anions and acquired the influence of concentration by the spontaneous Raman spectrum. The results agreed well with the previous researches. To explore further, the stimulated Raman scattering of a halide-water binary solution is measured to study the nature of the hydrogen bonding between water molecules and halogen anions. Under the effect of laser-induced plasma, the OH stretching vibration spectra of aqueous solutions of halogen ions pretty exhibit different trend compared with that of spontaneous Raman spectrum. The frequency shifts of water OH vibration show different values and directions with adding different halide anions. The red shift of F-- and Cl--water molecule clusters is due to the process of charge transfer, whereas the blue shift of Br-- and I--water molecule cluster is due to polarization effect without charge transfer. The results demonstrate that F- and Cl- slightly weaken the hydrogen bond (HB), whereas Br- and I- enhance HB in the water cluster. The decrease of concentration of halogen ions aqueous solution can weaken the effect on the HB. [ABSTRACT FROM AUTHOR]

Published
2016
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70. Measurement of the very rare K+→π+νν¯ decay.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., and Lomidze, D.

Abstract

The NA62 experiment reports the branching ratio measurement BR K + → π + ν ν ¯ = 10.6 − 3.4 + 4.0 stat ± 0.9 syst × 10 − 11 at 68% CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the CERN SPS during 2016–2018. This provides evidence for the very rare K+→ π + ν ν ¯ decay, observed with a significance of 3.4σ. The experiment achieves a single event sensitivity of (0.839 ± 0.054) × 10−11, corresponding to 10.0 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10−11. This measurement is also used to set limits on BR(K+→ π+X), where X is a scalar or pseudo-scalar particle. Details are given of the analysis of the 2018 data sample, which corresponds to about 80% of the total data sample. [ABSTRACT FROM AUTHOR]

Published
2021
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72. Status of the NA62 Experiment.

Author

D'Ambrosio, G., Iacovacci, M., Mastroianni, S., Passera, M., Venanzoni, G., and Piccini, M.

Subjects
STANDARD model (Nuclear physics), DATA analysis, ELECTROWEAK interactions, LEPTONS (Nuclear physics), NUCLEAR physics
Abstract

The decay K + → π + v v ¯ $ {K^ + } \to {\pi ^ + }v\bar v $ , with a very precisely predicted branching ratio of less than 10−10 in the Standard Model framework, is one of the best candidates to reveal indirect effects of new physics at the highest mass scales. The NA62 experiment at CERN SPS is designed to measure the branching ratio of such decay with a decay-in-flight technique, novel for this channel. The main goal of NA62 is to measure such Branching Ratio of K + → π + v v ¯ $ {K^ + } \to {\pi ^ + }v\bar v $ with an accuracy better than 20%. This will be achieved by collecting up to 100 K + → π + v v ¯ $ {K^ + } \to {\pi ^ + }v\bar v $ events with a background contamination at the level of 10%. The NA62 detector was commissioned in 2014 and 2015 and the experiment took physics data from 2015 to 2018. NA62 has already published the result of the 2016 data analysis. The 2017 data analysis is in progress, the single event sensitivity reached and the evaluation of the main backgrounds will be shown in this contribution. [ABSTRACT FROM AUTHOR]

Published
2020
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73. Search for a feebly interacting particle X in the decay K+ → π+X.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., and Marchevski, R.

Subjects
PARTICLE decays, BRANCHING ratios, MAGNITUDE (Mathematics), DATA analysis
Abstract

A search for the K+ → π+X decay, where X is a long-lived feebly interacting particle, is performed through an interpretation of the K+ → π + ν ν ¯ analysis of data collected in 2017 by the NA62 experiment at CERN. Two ranges of X masses, 0–110 MeV/c2 and 154–260 MeV/c2, and lifetimes above 100 ps are considered. The limits set on the branching ratio, BR(K+ → π+X), are competitive with previously reported searches in the first mass range, and improve on current limits in the second mass range by more than an order of magnitude. [ABSTRACT FROM AUTHOR]

Published
2021
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74. Search for π0 decays to invisible particles.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., and Marchevski, R.

Abstract

The NA62 experiment at the CERN SPS reports a study of a sample of 4 × 109 tagged π0 mesons from K+ → π+π0(γ), searching for the decay of the π0 to invisible particles. No signal is observed in excess of the expected background fluctuations. An upper limit of 4.4 × 10−9 is set on the branching ratio at 90% confidence level, improving on previous results by a factor of 60. This result can also be interpreted as a model- independent upper limit on the branching ratio for the decay K+ → π+X, where X is a particle escaping detection with mass in the range 0.110–0.155 GeV/c2 and rest lifetime greater than 100 ps. Model-dependent upper limits are obtained assuming X to be an axion-like particle with dominant fermion couplings or a dark scalar mixing with the Standard Model Higgs boson. [ABSTRACT FROM AUTHOR]

Published
2021
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75. First Record of the Japanese Grape Leafhopper Arboridia kakogawana (Matsumura, 1932) (Homoptera: Cicadellidae, Erythroneurini) in Bulgaria.

Author

Tomov, Rumen

Subjects
LEAFHOPPERS, INTRODUCED insects, INTRODUCED species, GRAPES
Abstract

The Japanese grape leafhopper Arboridia kakogawana is reported as a new species to the fauna of Bulgaria. The leafhopper was detected on grapevines (Vitis sp.) at 16 out of the 65 localities investigated in Bulgaria, at altitudes from 15 to 350 m a.s.l. At present, A. kakogawana is still in the expansion phase of its invasion process in Bulgaria and has a limited distribution, mainly in the Northern Bulgaria and the Black Sea coast. Heavily infested plants were detected only in towns along the Danube River - Nikopol, Ruse, and Silistra, which shows that the leafhopper most probably has been introduced into Bulgaria unintentionally from Romania. The current distribution pattern of the species in Bulgaria suggests that its dispersal is human-mediated and the main pathways are the transport of contaminant nursery material and transport - stowaway. Further studies of the impact of this species on vineyards are needed. [ABSTRACT FROM AUTHOR]

Published
2020

76. Invasive Insect Species Detected on Grapevines in Romania during 2016-2019 and First Record of Erasmoneura vulnerata (Fitch, 1851) (Hemiptera: Cicadellidae).

Author

Chireceanu, Constantina, Bosoi, Marioara, Podrumar, Teodor, Ghica, Mihu, Teodoru, Andrei, Chiriloaie-Palade, Andrei, and Zaharia, Roxana

Subjects
INTRODUCED insects, INTRODUCED species, GRAPES, LEAFHOPPERS
Abstract

The paper presents the results of a three-year survey (2016-2019) on the presence and distribution of invasive insects on grapevines in Romania. Five pest species were detected on the grapevines at 11 localities in different regions in the country, as follows: the North American leafhopper of grapevine Erasmoneura vulnerata, the Japanese leafhoppers Arboridia kakogawana, the Asian leafhopper Phlogotettix cyclops, the vine bud moth Theresimima ampellophaga and the spotted-wing drosophila Drosophila suzukii. The species E. vulnerata is reported for the first time from Romania. We present and discuss data about distribution and abundance of all recorded invasive insect species, as well as data about the potential damage caused on the grapevines in Romania. [ABSTRACT FROM AUTHOR]

Published
2020

77. An investigation of the very rare K+→π+νν¯ decay.

Author

Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., and Marchevski, R.

Subjects
STANDARD model (Nuclear physics), INVESTIGATION reports, DATA recorders & recording, FORECASTING
Abstract

The NA62 experiment reports an investigation of the K + → π + ν ν ¯ mode from a sample of K+ decays collected in 2017 at the CERN SPS. The experiment has achieved a single event sensitivity of (0.389 ± 0.024) × 10−10, corresponding to 2.2 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10−11. Two signal candidates are observed with an expected background of 1.5 events. Combined with the result of a similar analysis conducted by NA62 on a smaller data set recorded in 2016, the collaboration now reports an upper limit of 1.78 × 10−10 for the K + → π + ν ν ¯ branching ratio at 90% CL. This, together with the corresponding 68% CL measurement of ( 0.48 − 0.48 + 0.72 ) × 10−10, are currently the most precise results worldwide, and are able to constrain some New Physics models that predict large enhancements still allowed by previous measurements. [ABSTRACT FROM AUTHOR]

Published
2020
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78. Characterization of the Influence of Hydrated Ions on the Oxygen–Hydrogen Stretching Vibration of Water by Raman Spectroscopy.

Author

Tian, Zhi-xian, Zhang, Xin, Liu, Chang-ling, Meng, Qing-guo, Du, Zeng-feng, and Yan, Jun

Subjects
RAMAN spectroscopy, IONIC crystals, IONS, RAMAN effect, CALCIUM ions, STRONTIUM, HYDROGEN bonding, STRONTIUM ions
Abstract

The Raman OH stretching vibration band of liquid water is asymmetric and multimode superimposed and is susceptible to variations in salinity, pressure, and temperature. Ions have non-negligible influences on the Raman O–H stretching band of water because these ion–water interactions are stronger than those between water molecules. The determination of molecular-level details of hydration processes remains a great challenge, both experimentally and theoretically. The effects of 11 common ions on the O–H stretching band of liquid water are characterized with a skewing parameter introduced to describe the distortion caused by ion hydration. With increasing salt concentration, the symmetry of the Raman O–H stretching band decreases as the skewing parameter value increases. Therefore, ions primarily break the tetrahedral hydrogen bonding and promote the formation of partly hydrogen-bonded and free water molecules. Additionally, the effects of anions are much stronger than those of cations due to the asymmetric charge distribution in the dipoles of H2O. It is revealed that the influences of the common ions on the Raman OH stretching band of water are in the following order: I– > Br– > Cl– > F–, SO 4 2 − > CO 3 2 − , K+ > Na+, and Sr2+ > Ca2+ > Mg2+. For ions with the same charge, the order of their effects on the Raman O–H stretching band of water is usually the same as the order of their ionic crystal radii but the reverse order of their hydrated radii. [ABSTRACT FROM AUTHOR]

Published
2020
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79. Machine Learning for Optical Gas Sensing: A Leaky-Mode Humidity Sensor as Example.

Author

Kornienko, Vladimir V., Nechepurenko, Igor A., Tananaev, Peter N., Chubchev, Eugeny D., Baburin, Aleksandr S., Echeistov, Vladimir V., Zverev, Alexander V., Novoselov, Ivan I., Kruglov, Ivan A., Rodionov, Ilya A., Baryshev, Alexander V., and Dorofeenko, Alexander V.

Abstract

Optical gas sensing attracts growing attention in the recent years. This is governed by progressive availability of optical nanostructures fabrication and complex techniques of optical spectrum processing. In the present paper, a room-temperature optical humidity sensor based on a hydrophilic polymer Nafion is theoretically and experimentally investigated. Sensor geometry is optimized for maximum sensitivity of an angle-resolved ATR dip in the Kretschmann configuration. The reflectance dip is attributed to the 2nd order Nafion layer leaky waveguide mode hybridized with the surface plasmon-polariton at the silver/Nafion interface. Results of the relative humidity (RH) retrieval with the regression of the physical model parameters is compared to these obtained with different machine learning (ML) techniques. It is shown that a limited raw data set is enough for using ML algorithms. Accuracy of 0.3% has been demonstrated in RH measurements. [ABSTRACT FROM AUTHOR]

Published
2020
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80. Mapping electromagnetic fields structure in plasma using a spin polarized electron beam.

Author

An, X. Y., Chen, M., Li, J. X., Weng, S. M., He, F., Sheng, Z. M., and Zhang, J.

Subjects
RELATIVISTIC electron beams, ELECTRON spin, ELECTROMAGNETIC fields, ELECTRON beams, ELECTRONIC probes
Abstract

We propose a scheme to mapping electromagnetic field structure in plasma by using a spin polarized relativistic electron beam. Especially by using Particle-in-Cell (PIC) and spin tracing simulations, we have successfully reconstructed a plasma wakefield from the spin evolution of a transmitted electron beam. Electron trajectories of the probe beam are obtained from PIC simulations, and the spin evolutions during the beam propagating through the fields are calculated by a spin tracing code. The reconstructed fields illustrate the main characters of the original fields, which demonstrates the feasibility of field detection by use of spin polarized relativistic electron beams. [ABSTRACT FROM AUTHOR]

Published
2019
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81. Search for K+ → π+νν̄ at the NA62 experiment.

Author

Duk, Viacheslav

Subjects
STANDARD model (Nuclear physics), COLLIDERS (Nuclear physics), BRANCHING ratios, FEYNMAN diagrams, MUONS
Abstract

Looking for phenomena beyond the Standard Model (SM) in rare decays is a complementary approach to direct searches for New Physics (NP) at colliders. One of the theoretically cleanest processes is the ultra rare decay K+ → π+νν̄. The goal of the NA62 experiment at CERN SPS is to measure the branching ratio (BR) of this decay with 10% precision. The experiment has been launched in 2014. In 2015, the detector was commissioned at a low intensity beam. The experimental setup is described and performances achieved in 2015 are discussed in view of the final measurement. [ABSTRACT FROM AUTHOR]

Published
2016
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82. Recent results and prospects from NA62.

Author

Bizzeti, NAndrea

Subjects
NEUTRAL pion, ELECTROMAGNETISM, MOMENTUM transfer, MONTE Carlo method, CALORIMETERS
Abstract

A large sample of charged kaon decays in 2007 has been collected by the NA62 experiment at CERN SPS using the experimental setup of the former NA48 experiment. Its intense kaon beam provides an abundant source of tagged neutral pions in vacuum. A measurement of the electromagnetic transition form factor slope of the neutral pion from 1.05 × 106 fully reconstructed π0 Dalitz decays is presented. The obtained preliminary value a = (3.70 ± 0.53stat ± 0.36syst) × 10-2 is the first 5.8σ observation of a non-zero slope in the time-like region of momentum transfer. K+ππ+ν¯ν is a theoretically very clean decay where indirect effects of new physics may be detectable. The NA62 apparatus has been significantly upgraded between 2008 and 2014 in order to measure the branching ratio of this decay with 10% precision. The NA62 experiment took data with the new setup in pilot runs in 2014 and 2015, reaching the design beam intensity. Results of first data quality studies in view of the 2016-2017 physics runs are presented. [ABSTRACT FROM AUTHOR]

Published
2016
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83. Protection of Turkmen 'White Gold' under the white sun of the desert.

Author

Niyazov, O.

Abstract

This article, dedicated to the memory of E.S. Sugonyaev, is based on publications of the developers of the integrated system of cotton pest control in Turkmenistan. Field studies of the cotton agroecosystem were conducted for 5-6 years beginning from 1971 in Murghab Oasis. It was found that no protective measures were required in the presence of 250-300 active zoophages per 100 cotton plants, and also that cotton sowing dates were of great significance for pest control. [ABSTRACT FROM AUTHOR]

Published
2015
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84. Monitoring and control of Metcalfa pruinosa (Say) (Hemiptera, Auchenorrhyncha: Flatidae) in Krasnodar Territory.

Author

Balakhnina, I., Pastarnak, I., and Gnezdilov, V.

Abstract

Metcalfa pruinosa (Say) is an invasive planthopper species rapidly expanding its range in Europe and Southern Russia and acquiring new food plants, which makes it a potential threat to agriculture, including organic farming. The distribution and injuriousness of this species in Krasnodar Territory was analyzed, and the possibilities of monitoring and controlling M. pruinosa populations were studied. Yellow sticky traps were found to be unattractive to M. pruinosa. Among the preparations studied, Actara and Fitoverm proved to be the most toxic to the nymphs in the first three days after treatment. [ABSTRACT FROM AUTHOR]

Published
2014
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85. Adaptive methods for solving inverse problems in laser raman spectroscopy of multi-component solutions.

Author

Dolenko, S., Burikov, S., Dolenko, T., and Persiantsev, I.

Abstract

This study provides comparative analysis of approaches connected with application of neural network based algorithms for efficient solution of pattern recognition problem (inverse problem with discrete output) combined with solution of inverse problem with continuous output. The analysis is performed at the example of the problem of identification and determination of concentrations of inorganic salts in multi-component aqueous solutions by Raman spectrum. [ABSTRACT FROM AUTHOR]

Published
2012
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87. RECENT RESULTS FROM VES EXPERIMENT.

Author

NIKOLAENKO, V., EKIMOV, A., KACHAEV, I., KARYUKHIN, A., KONSTANTINOV, V., IVASHIN, V., MAKOUSKI, M., MATVEEV, V., MYAGKOV, A., POLYAKOV, B., RYABCHIKOV, D., SHALANDA, N., SOLDATOV, M., SOLODKOV, A. A., SOLODKOV, A. V., SOLOVIANOV, O., SUGONYAEV, V., SALOMATIN, YU., and VOLKOV, E.

Subjects
EXCHANGE reactions, NUCLEAR charge, PHYSICS experiments, MASS transfer, ISOBARIC spin, MESONS, CP violation, SYMMETRY (Physics)
Abstract

The charge-exchange reaction π-p → ω(780)ɸ(1020)n is studied with the VES setup. The (ωΦ) system is observed at relatively low background. Its invariant mass distribution peaks near threshold. The two-particles partial wave analyses shows that the JPC = 0++ state dominates. Comparison with scalar wave in ωω system at the comparable mass gives evidence for violation of the OZI rule. Another subject is a search for possible transition f0(980) → a0(980), which violates the isospin symmetry. [ABSTRACT FROM AUTHOR]

Published
2011

88. Variation in the fluorescent background in Raman spectra of distilled water purified by different methods.

Author

Adiks, T., Bunkin, A., Luk’yanchenko, V., and Pershin, S.

Abstract

The contribution of impurity fluorescence was determined in the water Raman spectra excited by the second harmonic ( λ = 532 nm) of a pulsed Nd:YAG laser. Water samples prepared by different techniques (tap water (undistilled), distilled water, Milli-Q water, water for injections, and water subjected to cavitation treatment) were investigated. The Raman (bands at ν 2 ∼ 1550 cm−1 and ν 3 ∼ 3400 cm−1) and fluorescence (Stokes shift 2500 cm−1) signals were separated spectrally and according to the differences in the emission kinetics. It was established that all investigated samples, including distilled and specially purified water for injections, exhibit afterglow. The highest sensitivity to the presence of impurities was revealed near ∼ 2500 cm−1. The least contribution to the fluorescence signal was found in the water for injections. [ABSTRACT FROM AUTHOR]

Published
2008
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89. The OPERA Spectrometer Slow Control System.

Author

Bergnoli, A., Bertolin, A., Brugnera, R., Carrara, E., Cazes, A., Dal Corso, F., Dusini, S., Felici, G., Garfagnini, A., Longhin, A., Mantello, U., Mengucci, A., Paoloni, A., Stanco, L., Sugonyaev, V., Terranova, F., and Ventura, M.

Subjects
COMMAND & control systems, SPECTROMETERS, COMPUTER systems, DETECTORS, NEUTRINOS, PARTICLE beams, SUPERCONDUCTING magnets, DATABASES, ELECTRONIC equipment
Abstract

OPERA is a long-baseline neutrino experiment at the Gran Sasso underground laboratories (LNGS), to observe Vτ appearance in a Vμ neutrino beam produced at CERN. The detector is a structure of two super modules, each built-up of a massive lead/nuclear-emulsion target complemented by electronic detectors and a magnetic spectrometer. The two magnets are instrumented by 1000 Resistive Plate Chambers (RPCs) detectors for a total surface of about 3200 m2. The slow control system has been designed to monitor and control all the critical parameters for the proper functioning of the spectrometers. The different hardware (Magnet and RPC High Voltage power supplies, RPC current meters, Magnet and RPC temperature sensors, RPC timing boards) is read out via CAN bus connections by several distributed clients. The clients write the data to a relational database (PostgresSQL) which is the heart of the system: it gives persistence to the data and allows to perform correlations useful to debug possible system malfunctioning. Among the various tools (histograms and XML Configuration Managers), a controller process checks for possible failures of the system using data from the database and generates warnings/alarms for people on shift. [ABSTRACT FROM AUTHOR]

Published
2008
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90. The Role of Fermi Resonance in Formation of Valence Band of Water Raman Scattering.

Author

Burikov, Sergey A., Dolenko, Tatiana A., and Fadeev, Victor V.

Subjects
RESONANCE Raman effect, RAMAN effect, RESONANCE, RAMAN spectroscopy, VALENCE fluctuations, COUPLING constants, GENETIC algorithms, PARTICLES (Nuclear physics), ESTIMATION theory
Abstract

The role of Fermi resonance in formation of valence band of water Raman scattering was investigated. Simultaneous measurement of characteristics of bending and valence bands of water in D2O solutions, KBr and KCl and using genetic algorithms in conjunction with variation methods allowed increasing accuracy of estimation of Fermi resonance coupling constant and of Fermi resonance contribution into formation of water Raman valence band. [ABSTRACT FROM AUTHOR]

Published
2008
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91. Identification of inorganic salts and determination of their concentrations in aqueous solutions based on the valence Raman band of water using artificial neural networks.

Author

Burikov, S., Dolenko, T., Fadeev, V., and Sugonyaev, A.

Abstract

The characteristic features of the valence Raman band of water in the solutions of electrolytes are revealed. These features allow the noncontact recognition of the type of salt and the determination of its concentration in aqueous solutions using artificial neural networks. [ABSTRACT FROM AUTHOR]

Published
2007
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92. 2005 Index.

Subjects
INDEXES, NUCLEAR science
Abstract

The article presents the index to the vol. 52 issue of the journal "IEEE Transactions on Nuclear Science."

Published
2005
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93. Tests of OPERA RPC detectors.

Author

Bergnoli, A., Borsato, E., Brugnera, R., Buccheri, E., Candela, A., Carrara, E., Ciesielski, R., Corradi, G., D'Incecco, M., Dal Corso, F., Esposti, L. Degli, Di Giovanni, A., Di Marco, N., Di Troia, C., Dusini, S., Fanin, C., Felici, G., Gambarara, A., Garfagnini, A., and Gorin, A.

Subjects
DETECTORS, ELECTRODES, COSMIC rays, SPECTROMETERS, ELECTRONIC noise
Abstract

OPERA is part of the CNGS project and it is an experiment dedicated to the observation of long-baseline numu into nutau oscillations through tau appearance. Resistive Plate Chambers (RPCs) with bakelite electrodes are used to instrument the 2 cm gaps between the magnetized iron slabs of the two spectrometers. The RPC installation ended in may 2004 on the first spectrometer and in march 2005 on the second one. Before the installation, every RPC is subjected to a complete test chain in order to reject the poorer quality detectors. The tests are performed in dedicated facilities to ensure the proper RPC gluing, to measure its electrical properties and to verify the response to cosmic rays and the intrinsic noise levels. We have also tested the long term stability of real size OPERA RPC prototypes operated at cosmic ray fluxes for more than one year. On small size prototypes we are performing studies on the gas mixtures in order to reduce the total charge released in the gas for each detector count. The validation of the installed RPCs has been performed with pure nitrogen. A small part of them has been also tested with the gas mixture Ar/C2H2F4/i-C4H10 /SF6=75.4/20/4/0.6 [ABSTRACT FROM PUBLISHER]

Published
2005
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94. The Effect of Hydration of Ions of Inorganic Salts on the Shape of the Raman Stretching Band of Water.

Author

Burikov, S.A., Dolenko, T.A., Velikotny&icaron;, P.A., Sugonyaev, A.V., and Fadeev, V.V.

Subjects
RAMAN spectroscopy, SPECTRUM analysis, MOLECULAR spectra, RESONANCE Raman effect, SALTS, HYDRATION, IONS
Abstract

The shape of the Raman stretching band of water molecules in aqueous solutions of electrolytes KBr, KCl, KI, NaCl, and NaI is studied. It is confirmed that the characteristics of the stretching band strongly depend on the concentration and type of salt. The behavior of different parameters of the band is explained in terms of the theory of hydration of salts. © 2005 Pleiades Publishing, Inc. [ABSTRACT FROM AUTHOR]

Published
2005
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95. Flavor constraints on electroweak ALP couplings.

Author

Gavela, M. B., Houtz, R., Quilez, P., Rey, R. del, and Sumensari, O.

Subjects
FLAVOR, COMPLEMENTARITY constraints (Mathematics), PARTICLES, BEVERAGE flavor & odor
Abstract

We explore the signals of axion-like particles (ALPs) in flavor-changing neutral current (FCNC) processes. The most general effective linear Lagrangian for ALP couplings to the electroweak bosonic sector is considered, and its contribution to FCNC decays is computed up to one-loop order. The interplay between the different couplings opens new territory for experimental exploration, as analyzed here in the ALP mass range 0 < m a ≲ 5 GeV. When kinematically allowed, K → π ν ν ¯ decays provide the most stringent constraints for channels with invisible final states, while B-meson decays are more constraining for visible decay channels, such as displaced vertices in B → K (∗) μ + μ - data. The complementarity with collider constraints is discussed as well. [ABSTRACT FROM AUTHOR]

Published
2019
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97. Application Of Adaptive Neural Network Algorithms For Determination Of Salt Composition Of Waters Using Laser Spectroscopy

Author

Tatiana A. Dolenko, Sergey A. Burikov, Alexander O. Efitorov, and Sergey A. Dolenko

Subjects
Inverse problems, multi-component solutions, Raman spectroscopy, neural networks
Abstract

In this study, a comparative analysis of the approaches associated with the use of neural network algorithms for effective solution of a complex inverse problem – the problem of identifying and determining the individual concentrations of inorganic salts in multicomponent aqueous solutions by the spectra of Raman scattering of light – is performed. It is shown that application of artificial neural networks provides the average accuracy of determination of concentration of each salt no worse than 0.025 M. The results of comparative analysis of input data compression methods are presented. It is demonstrated that use of uniform aggregation of input features allows decreasing the error of determination of individual concentrations of components by 16-18% on the average., {"references":["M. H. Hassoun, Fundamentals of Artificial Neural Networks.\nMassachusetts, Cambridge: MIT Press, 1995.","S. S. Haykin, Neural networks: a comprehensive foundation. Prentice\nHall, 1999.","S. A. Dolenko, A. V. Filippov, A. F. Pal, I. G. Persiantsev, and A. O.\nSerov, \"Use of neural network based auto-associative memory as a data\ncompressor for pre-processing optical emission spectra in gas\nthermometry with the help of neural network,\" Nuclear Instruments and\nMethods in Physics Research Section A: Accelerators, Spectrometers,\nDetectors and Associated Equipment (NIMA A), vol. 502, no. 2-3, pp.\n523-525, 2003.","S. A. Burikov, A. M. Vervald, I. I. Vlasov, S. A. Dolenko, K. A.\nLaptinskiy, and T. A. Dolenko, \"Use of neural network algorithms for\nelaboration of fluorescent biosensors on the base of nanoparticles,\"\nOptical Memory and Neural Networks (Information Optics), vol. 22, no.\n3, pp. 156–165, 2013.","M. Talone, R. Sabia, A. Camps, M. Vall-llosera, C. Gabarró, and J.\nFont, \"Sea surface salinity retrievals from HUT-2D L-band radiometric\nmeasurements,\" Remote Sens. Environ., no. 114, pp. 1756-1764, 2010.","A. Camps, J. Font, M. Vall-llossera, I. Corbella, N. Duffo, F. Torres, S.\nBlanch, A. Aguasca, R. Villarino, C. Gabarró, L. Enrique, J. Miranda, R.\nSabia, and M. Talone, \"Determination of the sea surface emissivity at Lband\nand application to SMOS salinity retrieval algorithms: Review of\nthe contributions of the UPC-ICM,\" Radio Science, vol. 43, p.RS3008,\n2008.","J. Font, J. Boutin, N. Reul, P. Spurgeon, J. Ballabrera-Poy, A. Chuprin,\net al., \"SMOS first data analysis for sea surface salinity determination,\"\nInternational J. of Remote Sensing, no. 1, pp. 1-17, 2013.","T. G. Balicheva, and O. A. Lobaneva, Electronic and vibrational spectra\nof inorganic and coordination compounds. Leningrad: Leningrad State\nUniversity, 1983, pp. 9-81. (Russian)","S. F. Baldwin, and C. W. Brown, \"Detection of ionic water pollutants by\nlaser excited Raman spectroscopy,\" Water Research, vol. 6, pp. 1601-\n1604, 1972.\n[10] W. W. Rudolph, and G. Irmer, \"Raman and infrared spectroscopic\ninvestigation on aqueous alkali metal phosphate solutions and density\nfunctional theory calculations of phosphate-water clusters,\" Applied\nspectroscopy, vol. 61, no 12, pp. 274A-292A, 2007.\n[11] F. Rull, and J. A. De Saja, \"Effect of electrolyte concentration on the\nRaman spectra of water in aqueous solutions,\" J. Raman Spectroscopy,\nvol. 17, no. 2, pp.167-172, 1986.\n[12] G. E. Walrafen, \"Raman studies of the effects of temperature on water\nand electrolyte solutions,\" J. Chem. Phys., vol. 44, no. 4, pp. 1546-1558,\n1966.\n[13] T. A. Dolenko, I. V. Churina, V. V. Fadeev, and S. M. Glushkov,\n\"Valence band of liquid water Raman scattering: some peculiarities and\napplications in the diagnostics of water media,\" J. Raman Spectroscopy,\nvol. 31, pp. 863-870, 2000.\n[14] T. A. Gogolinskaia, S. V. Patsaeva, and V. V. Fadeev, \"The regularities\nof change of the 3100-3700 cm-1 band of water Raman scattering in salt\naqueous solutions,\" Doklady Akademii Nauk SSSR, vol. 290, no. 5, pp.\n1099-1103, 1986.\n[15] G. M. Georgiev, T. K. Kalkanjiev, V. P. Petrov, and Zh. Nickolov,\n\"Determination of salts in water solutions by a skewing parameter of the\nwater Raman band,\" Applied Spectroscopy, vol. 38, no. 4, pp. 593-595,\n1984.\n[16] K. Furic, I. Ciglenecki, and B. Cosovic, \"Raman spectroscopic study of\nsodium chloride water solutions,\" J. Molecular Structure, vol. 6, pp.\n225-234, 2000.\n[17] A. Yu. Bekkiev, T. A. Gogolinskaia, and V. V. Fadeev, \"Simultaneous\ndetermination of temperature and salinity of sea water by the method of\nlaser Raman spectroscopy,\" Doklady Akademii Nauk SSSR, vol. 271, no.\n4, pp. 849-853, 1983.\n[18] S. A. Burikov, T. A. Dolenko, V. V. Fadeev, and A. V. Sugonyaev,\n\"Identification of inorganic salts and determination their concentrations\nin water solutions above the water Raman valence band using artificial\nneural networks,\" Pattern Recognition and Image Analysis, vol. 15, no.\n2, pp. 520-523, 2005.\n[19] S. A. Burikov, T. A. Dolenko, and V. V. Fadeev, \"Identification of\ninorganic salts and determination of their concentrations in\nmulticomponent aqueous solutions by the Raman valence band of water\nusing artificial neural networks,\" Neurocomputers: Development,\nApplication, no. 5, pp. 62-72, 2007.\n[20] S. A. Burikov, S. A. Dolenko, T. A. Dolenko, and I. G. Persiantsev,\n\"Application of Artificial Neural Networks to Solve Problems of\nIdentification and Determination of Concentration of Salts in Multi-\nComponent Water Solutions by Raman Spectra,\" Optical Memory and\nNeural Networks (Information Optics), vol. 19, no. 2, pp. 140-148, 2010.\n[21] S. A. Dolenko, S. A. Burikov, T. A. Dolenko, and I. G. Persiantsev,\n\"Adaptive Methods for Solving Inverse Problems in Laser Raman\nSpectroscopy of Multi-Component Solutions,\" Pattern Recognition and\nImage Analysis, vol. 22, no. 4, pp. 551-558, 2012.\n[22] I. V. Gerdova, S. A. Dolenko, T. A. Dolenko, I. V. Churina, and V. V.\nFadeev, \"New opportunity solutions to inverse problems in laser\nspectroscopy involving artificial neural networks,\" Izvestiya Akademii\nNauk Seriya Fizicheskaya, vol. 66, no. 8, pp. 1116-1124, 2002.\n[23] D. Specht, \"A General Regression Neural Network,\" IEEE Trans. on\nNeural Networks, vol. 2, no. 6, pp. 568-576, Nov. 1991.\n[24] H. R. Madala, and A. G. Ivakhnenko, Inductive Learning Algorithms for\nComplex Systems Modeling. CRC Press, 1994."]}

Published
2014
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98. The detection of neutrino interactions in the emulsion/lead target of the OPERA experiment

Author

Pozzato, M., N, Pretzl, o. K., Publichenko, d. P., Pupilli, b. F., Rescigno, u. R., Rizhikov, l. D., Roganova, aa T., Romano, b. G., Rosa, l. G., Rostovtseva, a. j. I., Rubbia, w. A., Russo, f. A., P, Ryasny, s. V., Ryazhskaya, a. O., Sadovski, a. A., Sato, v. O., Sato, y. Y., Saveliev, ak V., Schembri, aa A., Schmidt Parzefall, a. j. W., Schroeder, k. H., Sch¨utz, ad H. U., Schuler, d. J., Scotto Lavina, q. L., Shibuya, p. H., Simone, z. S., T, Sioli, ai M., Sirignano, Chiara, Sirri, l. G., Song, o. J. S., Spinetti, a. f. M., Stanco, h. L., Starkov, m. N., Stipcevic, g. M., Strauss, ae T., Strolin, f. P., Sugonyaev, s. V., Takahashi, m. S., Tereschenko, y. V., Terranova, v. F., Tezuka, h. I., Tioukov, ak V., Tolun, p. P., Tsarev, ac V., Tsenov, g. R., Tufanli, ah S., Ushida, ac N., Verguilov, ag V., Vilain, ah P., Vladimirov, al M., Votano, g. L., Vuilleumier, h. J. L., Wilquet, d. G., Wonsak, al B., Yakushev, k. V., Yoon, a. C. S., Yoshioka, a. f. T., Yoshida, y. J., Zaitsev, y. Y., Zghichej, w. A., Zimmermannk, R., Agafonova, N., Anokhina, a. A., Aoki, b. S., Ariga, c. A., Ariga, d. T., Arrabito, d. L., Autiero, e. D., Badertscher, e. A., Bagulya, f. A., Bersani Greggio, g. F., Bertolin, h. A., Besnier, i. M., J, Bick, 1 D., Boyarkin, k. V., Bozza, a. C., Brugi `ere, l. T., Brugnera, Riccardo, I, Brunetti, m. G., Buontempo, o. S., Carrara, p. E., I, M, Cazes, 2 A., Chaussard, e. L., Chernyavsky, e. M., Chiarella, g. V., Chon Sen, h. N., Chukanov, q. A., Cozzi, p. M., D’Amato, n. G., Dal Corso, l. F., D’Ambrosio, i. N., De Lellis, r. G., P, S, D´eclais, 3 Y., De Serio, e. M., Di Capua, t. F., Di Ferdinando, p. D., Di Giovanni, o. A., Di Marco, u. N., Di Troia, u. C., Dmitrievski, h. S., Dominjon, v. A., Dracos, e. M., Duchesneau, q. D., Dusini, j. S., Ebert, i. J., Egorov, k. O., Enikeev, w. R., Ereditato, a. A., Esposito, d. L. S., Favier, r. J., Felici, j. G., Ferber, h. T., Fini, k. R., Frekers, t. D., Fukuda, x. T., Fukushima, y. C., Galkin, z. V. I., Galkin, b. V. A., Garfagnini, Alberto, Giacomelli, m. G., Giorgini, o. M., Goellnitz, o. C., Goeltzenlichter, k. T., Goldberg, q. J., Golubkov, ab D., Gornushkin, w. Y., Grella, v. G., Grianti, l. F., Guler, h. M., Gustavino, ac C., Hagner, r. C., Hamada, k. K., Hara, y. T., Hierholzer, c. M., Hoshino, ad K., Ieva, y. M., Jakovcic, t. K., Janutta, ae B., Jollet, k. C., Juget, q. F., Kazuyama, d. M., Kim, y. S. H., a. f., Kimura, 4 M., Kitagawa, z. N., Klicek, y. B., Knuesel, ae J., Kodama, d. K., Kolev, ag D., Komatsu, ah M., Kose, y. U., Krasnoperov, 5 A., Kreslo, v. I., Krumstein, d. Z., Kubota, v. H., Kutsenov, y. V. V., Kuznetsov, a. V. A., Laktineh, a. I., Lazzaro, e. C., Lenkeit, f. J., Ljubicic, k. A., Longhin, ae A., Lutter, m. G., Malgin, d. A., Manai, a. K., Mandrioli, e. G., Marotta, o. A., Marteau, p. J., Matsuo, e. T., Matveev, z. V., Mauri, a. N., Medinaceli, o. E., Meisel, o. F., Meregaglia, d. A., Messina, q. M., Migliozzi, d. P., Miyamoto, 6 S., Monacelli, y. P., Morishima, u. K., Moser, y. U., Muciaccia, d. M. T., Naganawa, ai N., Naka, y. T., Nakamura, y. M., Nakano, y. T., Nikitina, y. V., Niwa, b. K., Nonoyama, y. Y., Nozdrin, y. A., Ogawa, v. S., Olchevski, z. A., Orlova, v. G., Osedlo, g. V., Ossetski, b. D., Paniccia, aa M., Paoloni, h. A., Park, h. B. D., Park, a. f. I. G., Pastore, a. f. A., Patrizii, ai L., Pennacchio, o. E., Pessard, e. H., Pilipenko, j. V., Pistillo, x. C., Polukhina, d. N., Agafonova, N, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Arrabito, L, Autiero, D, Badertscher, A, Bagulya, A, Bersani Greggio, F, Bertolin, A, Besnier, M, Bick, D, Boyarkin, 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, Dal Corso, F, D'Ambrosio, N, De Lellis, G, Déclais, Y, De Serio, M, Di Capua, F, Di Ferdinando, D, Di Giovanni, A, Di Marco, N, Di Troia, C, Dmitrievski, S, Dominjon, A, Dracos, M, Duchesneau, D, Dusini, S, Ebert, J, Egorov, O, Enikeev, R, Ereditato, A, Esposito, L, Favier, J, Felici, G, Ferber, T, Fini, R, Frekers, D, Fukuda, T, Fukushima, C, Galkin, V, Garfagnini, A, Giacomelli, G, Giorgini, M, Goellnitz, C, Goeltzenlichter, T, Goldberg, J, Golubkov, D, Gornushkin, Y, Grella, G, Grianti, F, Guler, M, Gustavino, C, Hagner, C, Hamada, K, Hara, T, Hierholzer, M, Hoshino, K, Ieva, M, Jakovcic, K, Janutta, B, Jollet, C, Juget, F, Kazuyama, M, Kim, S, Kimura, M, Kitagawa, N, Klicek, B, Knuesel, J, Kodama, K, Kolev, D, Komatsu, M, Kose, U, Krasnoperov, A, Kreslo, I, Krumstein, Z, Kubota, H, Kutsenov, V, Kuznetsov, V, Laktineh, I, Lazzaro, C, Lenkeit, J, Ljubicic, A, Longhin, A, Lutter, G, Malgin, A, Manai, K, Mandrioli, G, Marotta, A, Marteau, J, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meisel, F, Meregaglia, A, Messina, M, Migliozzi, P, Miyamoto, S, Monacelli, P, Morishima, K, Moser, U, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nikitina, V, Niwa, K, Nonoyama, Y, Nozdrin, A, Ogawa, S, Olchevski, A, Orlova, G, Osedlo, V, Ossetski, D, Paniccia, M, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pilipenko, V, Pistillo, C, Polukhina, N, Pozzato, M, Pretzl, K, Publichenko, P, Pupilli, F, Rescigno, R, Rizhikov, D, Roganova, T, Romano, G, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryasny, V, Ryazhskaya, O, Sadovski, A, Sato, O, Sato, Y, Saveliev, V, Schembri, A, Schmidt Parzefall, W, Schroeder, H, Schütz, H, Schuler, J, Scotto Lavina, L, Shibuya, H, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Sugonyaev, V, Takahashi, S, Tereschenko, V, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Tsarev, V, Tsenov, R, Tufanli, S, Ushida, N, Verguilov, V, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yakushev, V, Yoon, C, Yoshioka, T, Yoshida, J, Zaitsev, Y, Zghiche, A, Zimmermann, R, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), OPERA, N. AGAFONOVA, A. ANOKHINA, S. AOKI, A. ARIGA, T. ARIGA, L. ARRABITO, D. AUTIERO, A. BADERTSCHER, A. BAGULYA, F. BERSANI GREGGIO, A. BERTOLIN, M. BESNIER, D. BICK, V. BOYARKIN, C. BOZZA, T. BRUGIÈRE, R. BRUGNERA, G. BRUNETTI, S. BUONTEMPO, E. CARRARA, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKY, V. CHIARELLA, N. CHON-SEN, A. CHUKANOV, M. COZZI, G. D’AMATO, F. DAL CORSO, N. D’AMBROSIO, G. DE LELLIS, Y. DÉCLAIS, M. DE SERIO, F. DI CAPUA, D. DI FERDINANDO, A. DI GIOVANNI, N. DI MARCO, C. DI TROIA, S. DMITRIEVSKI, A. DOMINJON, M. DRACOS, D. DUCHESNEAU, S. DUSINI, J. EBERT, O. EGOROV, R. ENIKEEV, A. EREDITATO, L.S. ESPOSITO, J. FAVIER, G. FELICI, T. FERBER, R. FINI, D. FREKERS, T. FUKUDA, C. FUKUSHIMA, V.I. GALKIN, V.A. GALKIN, A. GARFAGNINI, G. GIACOMELLI, M. GIORGINI, C. GOELLNITZ, T. GOELTZENLICHTER, J. GOLDBERG, D. GOLUBKOV, Y. GORNUSHKIN, G. GRELLA, F. GRIANTI, M. GULER, C. GUSTAVINO, C. HAGNER, K. HAMADA, T. HARA, M. HIERHOLZER, K. HOSHINO, M. IEVA, K. JAKOVCIC, B. JANUTTA, C. JOLLET, F. JUGET, M. KAZUYAMA, S.H. KIM, M. KIMURA, N. KITAGAWA, B. KLICEK, J. KNUESEL, K. KODAMA, D. KOLEV, M. KOMATSU, U. KOSE, A. KRASNOPEROV, I. KRESLO, Z. KRUMSTEIN, H. KUBOTA, V.V. KUTSENOV, V.A. KUZNETSOV, I. LAKTINEH, C. LAZZARO, F J. LENKEIT, A. LJUBICIC, A. LONGHIN, G. LUTTER, A. MALGIN, K. MANAI, G. MANDRIOLI, A. MAROTTA, J. MARTEAU, T. MATSUO, V. MATVEEV, N. MAURI, E. MEDINACELI, F. MEISEL, A. MEREGAGLIA, M. MESSINA, P. MIGLIOZZI, S. MIYAMOTO, P. MONACELLI, K. MORISHIMA, U. MOSER, M.T. MUCIACCIA, N. NAGANAWA, T. NAKA, M. NAKAMURA, T. NAKANO, V. NIKITINA, K. NIWA, Y. NONOYAMA, A. NOZDRIN, S. OGAWA, A. OLCHEVSKI, G. ORLOVA, V. OSEDLO, D. OSSETSKI, M. PANICCIA, A. PAOLONI, B.D. PARK, I.G. PARK, A. PASTORE, L. PATRIZII, E. PENNACCHIO, H. PESSARD, V. PILIPENKO, C. PISTILLO, N. POLUKHINA, M. POZZATO, K. PRETZL, P. PUBLICHENKO, F. PUPILLI, R. RESCIGNO, D. RIZHIKOV, T. ROGANOVA, G. ROMANO, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, A. RUSSO, V. RYASNY, O. RYAZHSKAYA, A. SADOVSKI, O. SATO, Y. SATO, V. SAVELIEV, A. SCHEMBRI, W. SCHMIDT PARZEFALL, H. SCHROEDER, H.U. SCHUTZ, J. SCHULER, L. SCOTTO LAVINA, H. SHIBUYA, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J.S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, V. SUGONYAEV, S. TAKAHASHI, V. TERESCHENKO, F. TERRANOVA, I. TEZUKA, V. TIOUKOV, P. TOLUN, V. TSAREV, R. TSENOV, S. TUFANLI, N. USHIDA, V. VERGUILOV, P. VILAIN, M. VLADIMIROV, L. VOTANO, J.L. VUILLEUMIER, G. WILQUET, B. WONSAK, V. YAKUSHEV, C.S. YOON, T. YOSHIOKA, J. YOSHIDA, Y. ZAITSEV, A. ZGHICHEJ, R. ZIMMERMANNK, Greggio, F. Bersani, Chon Sen, N, Corso, F. Dal, Lellis, G. De, Serio, M. De, DI CAPUA, Francesco, Ferdinando, D. Di, Giovanni, A. Di, Marco, N. Di, Troia, C. Di, Esposito, L. S, Galkin, V. I, Galkin, V. A, Kim, S. H, Kutsenov, V. V, Kuznetsov, V. A, Mori\ shima, K, Muciaccia, M. T, Park, B. D, Park, I. G, Parzefall, W. Schmidt, Schütz, H. U, Lavina, L. Scotto, Song, J. S, Vuilleumier, J. L, Yoon, C. S, Zimmermann, R., Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), and Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
High energy, Particle physics, NEUTRINO OSCILLATIONS, FUNDAMENTAL PHYSICS, Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Particle tracking detectors, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Neutrino oscillation, Nuclear Experiment, Instrumentation, Mathematical Physics, Physics, Large Hadron Collider, Large detector systems for particle and astroparticle physics, 010308 nuclear & particles physics, Detector, High Energy Physics::Phenomenology, Astrophysics::Instrumentation and Methods for Astrophysics, NEUTRINO DETECTORS, 3. Good health, Particle tracking detector, Neutrino detector, Large detector systems for particle and astroparticle physic, Physique des particules élémentaires, PARTICLE PHYSICS, High Energy Physics::Experiment, Neutrino, Beam (structure), Particle Physics - Experiment, neutrino interactions, OPERA experiment, particle tracking detectors, large detector systems for particle and astroparticle, hysics
Abstract

The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in appearance mode through the study of νμ→ ντ oscillations. The apparatus consists of an emulsion/lead target complemented by electronic detectors and it is placed in the high energy long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. Runs with CNGS neutrinos were successfully carried out in 2007 and 2008 with the detector fully operational with its related facilities for the emulsion handling and analysis. After a brief description of the beam and of the experimental setup we report on the collection, reconstruction and analysis procedures of first samples of neutrino interaction events. © 2009 IOP Publishing Ltd and SISSA., 0, P06020, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

99. The OPERA experiment in the CERN to Gran Sasso neutrino beam

Author

Acquafredda, R., A, Adam, 1 T., Agafonova, b. N., Alvarez Sanchez, c. P., Ambrosio, d. M., Anokhina, a. A., Aoki, e. S., Ariga, f. A., Ariga, g. T., Arrabito, h. L., Aufranc, i. C., Autiero, i. D., Badertscher, i. A., Bagulya, j. A., Baussan, k. E., Bergnoli, b. A., L, Bersani Greggio, 2 F., Bertolin, m. A., Besnier, l. M., N, Biar ´e, 3 D., Bick, n. D., Blin, o. S., Borer, p. K., Boucrot, g. J., Boutigny, p. D., Boyarkin, 4 V., Bozza, c. C., Brugi `ere, q. T., Brugnera, i. R., R, Brunetti, l. G., S, Buontempo, t. S., Campagne, a. J. E., Carlus, p. B., Carrara, i. E., R, L, Cazes, 5 A., Chaussard, u. L., Chernyavsky, i. M., Chiarella, k. V., Chon Sen, u. N., Chukanov, b. A., Ciesielski, a. R., Consiglio, l. L., Cozzi, t. M., D’Amato, s. G., Dal Corso, q. F., D’Ambrosio, l. N., Damet, v. J., de La Taille, 6 C., De Lellis, p. G., W, A, D´eclais, 7 Y., Descombes, i. T., I, De Serio, 8 M., Di Capua, x. F., Di Ferdinando, a. D., Di Giovanni, t. A., Di Marco, y. N., Di Troia, y. C., Dick, u. N., Dmitrievski, b. S., Dominjon, z. A., Dracos, i. M., Duchesneau, b. D., Dulach, n. B., Dusini, u. S., Ebert, l. J., Efthymiopoulos, o. I., Egorov, d. O., Elsener, aa K., Enikeev, d. R., Ereditato, c. A., Esposito, g. L. S., Fanin, v. C., Favier, l. J., Felici, n. G., Ferber, u. T., Fini, o. R., Fournier, x. L., Franceschi, n. A., Frekers, u. D., Fukuda, ab T., Fukushima, h. C., Galkin, ac V. I., Galkin, e. V. A., Gallet, ad R., Gardien, n. S., Garfagnini, i. A., Gaudiot, l. G., Giacomelli, b. G., Giorgini, t. M., Girerd, t. C., Goellnitz, i. C., Goeltzenlichter, o. T., Goldberg, b. J., Golubkov, ae D., Gornushkin, aa Y., Grapton, z. J. N., Grella, b. G., Grianti, q. F., Gschwendtner, m. E., Guerin, d. C., Guler, i. M., Gustavino, a. f. C., Guyonnet, v. J. L., Hagner, b. C., Hamane, o. T., Hara, 9 T., Hauger, f. M., Hess, g. M., Hierholzer, g. M., Hoshino, ag K., Ieva, h. M., Incurvati, x. M., Jakovcic, u. K., Janicsko Csathy, ah J., Janutta, g. B., Jollet, o. C., Juget, b. F., Kazuyama, g. M., Kim, h. S. H., Khovansky, 10 N., Kimura, z. M., Klicek, ac B., Knuesel, ah J., Kodama, g. K., Kolev, a. j. D., Komatsu, M., Kose, h. U., a. f., Krasnoperov, 11 A., Kreslo, z. I., Krumstein, g. Z., Kutsenov, z. V. V., Kuznetsov, c. V. A., Laktineh, c. I., Lavy, i. M., Lazzaro, 12 C., j. T. D., Le, Le Flour, b. T., Lenkeit, n. J., Lewis, o. J., Lieunard, d. S., Ljubicic, n. A., Longhin, ah A., Lutter, r. G., Malgin, g. A., Manai, c. K., Mandrioli, i. G., Marotta, t. A., Marteau, a. J., Martin Chassard, i. G., Matveev, p. V., Mauri, c. N., Meddahi, t. M., Meisel, d. F., Meregaglia, g. A., Meschini, b. A., Messina, v. M., Migliozzi, g. P., Monacelli, a. P., Monteiro, y. I., Moreau, n. F., Morishima, 13 K., Moser, h. U., Muciaccia, g. M. T., Mugnier, x. P., Naganawa, n. N., Nakamura, h. M., Nakano, h. T., Napolitano, h. T., Nikitina, u. V., Niwa, e. K., Nonoyama, h. Y., Nozdrin, h. A., Ogawa, z. S., Olchevski, ac A., Orlandi, z. D., Orlova, v. G., Osedlo, k. V., Ossetski, e. D., Paniccia, ad M., Paoloni, u. A., Park, u. B. D., Park, h. I. G., Pastore, ai A., Patrizii, x. L., Pellegrino, t. L., Pennacchio, u. E., Pessard, i. H., Pilipenko, n. V., Pistillo, ab C., Polukhina, g. N., Pozzato, k. M., Pretzl, t. K., Publichenko, g. P., Pupilli, e. F., Raux, y. L., Repellin, p. J. P., Rescigno, p. R., Rizhikov, q. D., Roganova, ad T., Romano, e. G., Rosa, q. G., Rostovtseva, am I., Rubbia, aa A., Russo, j. A., W, Ryasny, a. V., Ryazhskaya, c. O., Sadovski, c. A., Sanelli, z. C., Sato, u. O., Sato, h. Y., Saveliev, an V., Sazhina, ad G., Schembri, e. A., Schmidt Parzefall, am W., Schroeder, o. H., Sch¨utz, ag H. U., Schuler, g. J., Scotto Lavina, b. L., Serrano, a. J., Shibuya, d. H., Simone, ac S., Sioli, x. M., Sirignano, Chiara, Sirri, q. G., Song, t. J. S., Spinetti, ai M., Stanco, u. L., Starkov, r. N., Stipcevic, k. M., Strauss, ah T., Strolin, j. P., Sugonyaev, a. V., Takahashi, 14 S., Talochkin, h. V., Tenti, c. M., Tereschenko, t. V., Terranova, z. F., U, Tezuka, 15 I., Tioukov, an V., Tolun, a. P., Tsarev, a. f. V., Tsenov, k. R., Tufanli, ak S., Ugolino, a. f. U., Ushida, a. N., Van Beek, a. j. G., Verguilov, ao V., Viant, ak T., Vilain, j. P., Vladimirov, ao M., Votano, k. L., Vuilleumier, u. J. L., Waelchli, g. T., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), OPERA, Acquafredda, R, Adam, T, Agafonova, N, Sanchez, P, Ambrosio, M, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Arrabito, L, Aufranc, C, Autiero, D, Badertscher, A, Bagulya, A, Baussan, E, Bergnoli, A, Greggio, F, Bertolin, A, Besnier, M, Biaré, D, Bick, D, Blin, S, Borer, K, Boucrot, J, Boutigny, D, Boyarkin, V, Bozza, C, Brugière, T, Brugnera, R, Brunetti, G, Buontempo, S, Campagne, J, 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, D'Ambrosio, N, Damet, J, Taille, C, Lellis, G, Déclais, Y, Descombes, T, Serio, M, Capua, F, Ferdinando, D, Giovanni, A, Marco, N, Troia, C, Dick, N, Dmitrievski, S, Dominjon, A, Dracos, M, Duchesneau, D, Dulach, B, Dusini, S, Ebert, J, Efthymiopoulos, I, Egorov, O, Elsener, K, Enikeev, R, Ereditato, A, Esposito, L, Fanin, C, Favier, J, Felici, G, Ferber, T, Fini, R, Fournier, L, Franceschi, A, Frekers, D, Fukuda, T, Fukushima, C, Galkin, V, 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, Grella, G, Grianti, F, Gschwendtner, E, Guerin, C, Guler, M, Gustavino, C, Guyonnet, J, Hagner, C, Hamane, T, Hara, T, Hauger, M, Hess, M, Hierholzer, M, Hoshino, K, Ieva, M, Incurvati, M, Jakovcic, K, Csathy, J, Janutta, B, Jollet, C, Juget, F, Kazuyama, M, Kim, S, Khovansky, N, Kimura, M, Klicek, B, Knuesel, J, Kodama, K, Kolev, D, Komatsu, M, Kose, U, Krasnoperov, A, Kreslo, I, Krumstein, Z, Kutsenov, V, Kuznetsov, V, Laktineh, I, Lavy, M, Lazzaro, C, Le, T, Flour, T, Lenkeit, J, Lewis, J, Lieunard, S, Ljubicic, A, Longhin, A, Lutter, G, Malgin, A, Manai, K, Mandrioli, G, Marotta, A, Marteau, J, Martin Chassard, G, Matveev, V, Mauri, N, Meddahi, M, Meisel, F, Meregaglia, A, Meschini, A, Messina, M, Migliozzi, P, Monacelli, P, Monteiro, I, Moreau, F, Morishima, K, Moser, U, Muciaccia, M, Mugnier, P, Naganawa, N, Nakamura, M, Nakano, T, Napolitano, T, Nikitina, V, Niwa, K, Nonoyama, Y, Nozdrin, A, Ogawa, S, Olchevski, A, Orlandi, D, Orlova, G, Osedlo, V, Ossetski, D, Paniccia, M, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pellegrino, L, Pennacchio, E, Pessard, H, Pilipenko, V, Pistillo, C, Polukhina, N, Pozzato, M, Pretzl, K, Publichenko, P, Pupilli, F, Raux, L, Repellin, J, Rescigno, R, Rizhikov, D, Roganova, T, Romano, G, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryasny, V, Ryazhskaya, O, Sadovski, A, Sanelli, C, Sato, O, Sato, Y, Saveliev, V, Sazhina, G, Schembri, A, Parzefall, W, Schroeder, H, Schütz, H, Schuler, J, Lavina, L, Serrano, J, Shibuya, H, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Sugonyaev, V, Takahashi, S, Talochkin, V, Tenti, M, Tereschenko, V, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Tsarev, V, Tsenov, R, Tufanli, S, Ugolino, U, Ushida, N, Beek, G, Verguilov, V, Viant, T, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Waelchli, T, Weber, M, Wilquet, G, Wonsak, B, Wurtz, J, Yakushev, V, Yoon, C, Zaitsev, Y, Zghiche, A, Zimmermann, R, Sanchez, P. Alvarez, Greggio, F. Bersani, Campagne, J. E, Corso, F. Dal, Taille, C. de La, Lellis, G. De, Serio, M. De, DI CAPUA, Francesco, Ferdinando, D. Di, Giovanni, A. Di, Marco, N. Di, Troia, C. Di, Esposito, L. S, Galkin, V. I, Galkin, V. A, Grapton, J. N, Guyonnet, J. L, Csathy, J. Janicsko, Kim, S. H, Kutsenov, V. V, Kuznetsov, V. A, Le, T. D, Flour, T. Le, Muciaccia, M. T, Park, B. D, Park, I. G, Repellin, J. P, Parzefall, W. Schmidt, Schütz, H. U, Lavina, L. Scotto, Song, J. S, Beek, G. Van, Vuilleumier, J. L, Yoon, C. S, Zimmermann, R., R. ACQUAFREDDA, T. ADAM, N. AGAFONOVA, P. ALVAREZ SANCHEZ, M. AMBROSIO, A. ANOKHINA, S. AOKI, A. ARIGA, T. ARIGA, L. ARRABITO, C. AUFRANC, D. AUTIERO, A. BADERTSCHER, A. BAGULYA, E. BAUSSAN, A. BERGNOLI, F. BERSANI GREGGIO, A. BERTOLIN, M. BESNIER, D. BIARÉ, D. BICK, S. BLIN, K. BORER, J. BOUCROT, D. BOUTIGNY, V. BOYARKIN, C. BOZZA, T. BRUGIÈRE, R. BRUGNERA, G. BRUNETTI, S. BUONTEMPO, J.E. CAMPAGNE, B. CARLUS, E. CARRARA, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKY, V. CHIARELLA, N. CHON-SEN, A. CHUKANOV, R. CIESIELSKI, L. CONSIGLIO, M. COZZI, G. D’AMATO, F. DAL CORSO, N. D’AMBROSIO, J. DAMET, C. DE LA TAILLE, G. DE LELLIS, Y. D´ECLAIS, T. DESCOMBES, M. DE SERIO, F. DI CAPUA, D. DI FERDINANDO, A. DI GIOVANNI, N. DI MARCO, C. DI TROIA, N. DICK, S. DMITRIEVSKI, A. DOMINJON, M. DRACOS, D. DUCHESNEAU, B. DULACH, S. DUSINI, J. EBERT, I. EFTHYMIOPOULOS, O. EGOROV, K. ELSENER, R. ENIKEEV, A. EREDITATO, L. S. ESPOSITO, C. FANIN, J. FAVIER, G. FELICI, T. FERBER, R. FINI, L. FOURNIER, A. FRANCESCHI, D. FREKERS, T. FUKUDA, C. FUKUSHIMA, V.I. GALKIN, V.A. GALKIN, R. GALLET, S. GARDIEN, A. GARFAGNINI, G. GAUDIOT, G. GIACOMELLI, M. GIORGINI, C. GIRERD, C. GOELLNITZ, T. GOELTZENLICHTER, J. GOLDBERG, D. GOLUBKOV, Y. GORNUSHKIN, J.-N. GRAPTON, G. GRELLA, F. GRIANTI, E. GSCHWENDTNER, C. GUERIN, M. GULER, C. GUSTAVINO, J.-L. GUYONNET, C. HAGNER, T. HAMANE, T. HARA, M. HAUGER, M. HESS, M. HIERHOLZER, K. HOSHINO, M. IEVA, M. INCURVATI, K. JAKOVCIC, J. JANICSKO CSATHY, B. JANUTTA, C. JOLLET, F. JUGET, M. KAZUYAMA, S.H. KIM, N. KHOVANSKY, M. KIMURA, B. KLICEK, J. KNUESEL, K. KODAMA, D. KOLEV, M. KOMATSU, U. KOSE, A. KRASNOPEROV, I. KRESLO, Z. KRUMSTEIN, V.V. KUTSENOV, V.A. KUZNETSOV, I. LAKTINEH, M. LAVY, C. LAZZARO, T.D. LE, T. LE FLOUR, J. LENKEIT, J. LEWIS, S. LIEUNARD, A. LJUBICIC, A. LONGHIN, G. LUTTER, A. MALGIN, K. MANAI, G. MANDRIOLI, A. MAROTTA, J. MARTEAU, G. MARTIN-CHASSARD, V. MATVEEV, N. MAURI, M. MEDDAHI, F. MEISEL, A. MEREGAGLIA, A. MESCHINI, M. MESSINA, P. MIGLIOZZI, P. MONACELLI, I. MONTEIRO, F. MOREAU, K. MORISHIMA, U. MOSER, M.T. MUCIACCIA, P. MUGNIER, N. NAGANAWA, M. NAKAMURA, T. NAKANO, T. NAPOLITANO, V. NIKITINA, K. NIWA, Y. NONOYAMA, A. NOZDRIN, S. OGAWA, A. OLCHEVSKI, D. ORLANDI, G. ORLOVA, V. OSEDLO, D. OSSETSKI, M. PANICCIA, A. PAOLONI, B. D PARK, I.G. PARK, A. PASTORE, L. PATRIZII, L. PELLEGRINO, E. PENNACCHIO, H. PESSARD, V. PILIPENKO, C. PISTILLO, N. POLUKHINA, M. POZZATO, K. PRETZL, P. PUBLICHENKO, F. PUPILLI, L. RAUX, J.P. REPELLIN, R. RESCIGNO, D. RIZHIKOV, T. ROGANOVA, G. ROMANO, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, J A. RUSSO, V. RYASNY, O. RYAZHSKAYA, A. SADOVSKI, C. SANELLI, O. SATO, Y. SATO, V. SAVELIEV, G. SAZHINA, A. SCHEMBRI, W. SCHMIDT PARZEFALL, H. SCHROEDER, H.U. SCH¨UTZ, J. SCHULER, L. SCOTTO LAVINA, J. SERRANO, H. SHIBUYA, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J.S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, V. SUGONYAEV, S. TAKAHASHI, V. TALOCHKIN, M. TENTI, V. TERESCHENKO, F. TERRANOVA, I. TEZUKA, V. TIOUKOV, P. TOLUN, V. TSAREV, R. TSENOV, S. TUFANLI, U. UGOLINO, N. USHIDA, G. VAN BEEK, V. VERGUILOV, T. VIANT, P. VILAIN, M. VLADIMIROV, L. VOTANO, J.L. VUILLEUMIER, T. WAELCHLI, M. WEBER, G. WILQUET, B. WONSAK, J. WURTZ, V. YAKUSHEV, C.S. YOON, Y. ZAITSEV, A. ZGHICHEN, R. ZIMMERMANN, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Particle physics, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], NEUTRINO OSCILLATIONS, FUNDAMENTAL PHYSICS, Physics::Instrumentation and Detectors, 7. Clean energy, 01 natural sciences, Nuclear physics, neutrino, Particle tracking detectors, 0103 physical sciences, Nuclear emulsion, Detectors and Experimental Techniques, 010306 general physics, Neutrino oscillation, Instrumentation, Mathematical Physics, ICARUS, Physics, Large Hadron Collider, Spectrometers, Large detector systems for particle and astroparticle physics, 010308 nuclear & particles physics, Hybrid detector, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Detector, Hybrid detectors, NEUTRINO DETECTORS, Particle tracking detector, FIS/01 - FISICA SPERIMENTALE, Large detector systems for particle and astroparticle physic, Physique des particules élémentaires, PARTICLE PHYSICS, High Energy Physics::Experiment, hybrid detectors, particle tracking detectors, large detector systems for particle and astroparticle physics, spectrometers, Supermodule, Neutrino, Lepton
Abstract

The OPERA neutrino oscillation experiment has been designed to prove the appearance of ντ in a nearly pure νμ beam (CNGS) produced at CERN and detected in the underground Hall C of the Gran Sasso Laboratory, 730 km away from the source. In OPERA, τ leptons resulting from the interaction of ντ are produced in target units called bricks made of nuclear emulsion films interleaved with lead plates. The OPERA target contains 150000 of such bricks, for a total mass of 1.25 kton, arranged into walls interleaved with plastic scintillator strips. The detector is split into two identical supermodules, each supermodule containing a target section followed by a magnetic spectrometer for momentum and charge measurement of penetrating particles. Real time information from the scintillators and the spectrometers provide the identification of the bricks where the neutrino interactions occurred. The candidate bricks are extracted from the walls and, after X-ray marking and an exposure to cosmic rays for alignment, their emulsion films are developed and sent to the emulsion scanning laboratories to perform the accurate scan of the event. In this paper, we review the design and construction of the detector and of its related infrastructures, and report on some technical performances of the various components. The construction of the detector started in 2003 and it was completed in Summer 2008. The experiment is presently in the data taking phase. The whole sequence of operations has proven to be successful, from triggering to brick selection, development, scanning and event analysis. © 2009 IOP Publishing Ltd and SISSA., 0, P04018, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

100. Emulsion sheet doublets as interface trackers for the OPERA experiment

Author

Anokhina, A., Aoki, S., Ariga, A., Arrabito, L., Autiero, D., Badertscher, A., Bay, F., Greggio, F.Bersani, Bertolin, A., Besnier, M., Bick, D., Bozza, C., Brugiere, T., Brugnera, R., Brunetti, G., Buontempo, S., Carrara, E., Cazes, A., Chaussard, L., Chernyavsky, M., Chiarella, V., Chon-Sen, N., Chukanov, A., Consiglio, L., Cozzi, M., Cuha, V., Dal Corso, F., D'Amato, G., D'Ambrosio, N., De Lellis, G., Declais, Y., De Serio, M., Di Capua, F., Di Ferdinando, D., Di Giovanni, A., Di Marco, N., Di Troia, C., Dmitrievski, S., Dominjon, A., Dracos, Marcos, Duchesneau, D., Dusini, S., Ebert, J., Egorov, O., Enikeev, R., Ereditato, Antonio, Esposito, L.S., Favier, J., Felici, G., Ferber, T., Fini, R., Frekers, D., Fukuda, T., Galkin, V.I., Galkin, V.A., Garfagnini, A., Giacomelli, G., Giorgini, M., Goellnitz, C., Goldberg, J., Golubkov, D., Gornushkin, Y., Grella, G., Grianti, F., Guler, M., Gusev, G., Gustavino, C., Hagner, Caren, Hara, T., Hierholzer, M., Hiramatsu, S., Hoshino, Kaoru, Ieva, M., Jakovcic, K., Janicsko Csathy, J., Janutta, B., Jollet, C., Juget, F., Kawai, T., Kazuyama, M., Kim, S.H., Knuesel, J., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laktineh, I., Lazzaro, C., Lenkeit, J., Ljubicic, A., Longhin, Andrea, Lutter, G., Manai, K., Mandrioli, G., Marotta, A., Marteau, J., Matsuo, T., Matsuoka, H., Mauri, N., Meisel, F., Meregaglia, A., Messina, M., Migliozzi, P., Mikado, S., Miyamoto, S., Monacelli, Piero, Morishima, Kunihiro, Moser, U., Muciaccia, Maria Teresa, Naganawa, N., Naka, T., Nakamura, M., Nakamura, T., Nakano, T., Nikitina, V., Niwa, K., Nonoyama, Y., Ogawa, S., Osedlo, V., Ossetski, D., Paoloni, A., Park, B.D., Park, I.G., Pastore, A., Patrizii, L., Pennacchio, E., Pessard, H., Pilipenko, V., Pistillo, C., Polukhina, N., Pozzato, M., Pretzl, Klaus P., Publichenko, P., Pupilli, F., Roganova, T., Rosa, G., Rostovtseva, I., Rubbia, A., Russo, A., Ryazhskaya, O., Ryzhikov, D., Sato, O., Sato, Y., Saveliev, V., Sazhina, G., Schembri, A., Scotto Lavina, L., Shibuya, H., Simone, S., Sioli, Max, Sirignano, C., Sirri, G., Song, J.S., Spinetti, M., Stanco, L., Starkov, N., Stipcevic, M., Strauss, T., Strolin, Paolo Emilio, Sugonyaev, V., Taira, Y., Takahashi, S., Tenti, M., Terranova, F., Tezuka, I., Tioukov, V., Tolun, P., Tsarev, V., Tufanli, S., Ushida, N., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J.L., Wilquet, G., Wonsak, B., Wurtz, J., Yoon, C.S., Yoshida, J., Zaitsev, Y., Zemskova, S., Zghiche, Amina, Zimmermann, R., Anokhina, A, Aoki, S, Ariga, A, Arrabito, L, Autiero, D, Badertscher, A, Bay, F, Greggio, F, Bertolin, A, Besnier, M, Bick, D, Bozza, C, Brugiere, T, Brugnera, R, Brunetti, G, Buontempo, S, Carrara, E, Cazes, A, Chaussard, L, Chernyavsky, M, Chiarella, V, Chon-Sen, N, Chukanov, A, Consiglio, L, Cozzi, M, Cuha, V, Dal Corso, F, D'Amato, G, D'Ambrosio, N, De Lellis, G, Déclais, Y, De Serio, M, Di Capua, F, Di Ferdinando, D, Di Giovanni, A, Di Marco, N, Di Troia, C, Dmitrievski, S, Dominjon, A, Dracos, M, Duchesneau, D, Dusini, S, Ebert, J, Egorov, O, Enikeev, R, Ereditato, A, Esposito, L, Favier, J, Felici, G, Ferber, T, Fini, R, Frekers, D, Fukuda, T, Galkin, V, Garfagnini, A, Giacomelli, G, Giorgini, M, Goellnitz, C, Goldberg, J, Golubkov, D, Gornushkin, Y, Grella, G, Grianti, F, Guler, M, Gusev, G, Gustavino, C, Hagner, C, Hara, T, Hierholzer, M, Hiramatsu, S, Hoshino, K, Ieva, M, Jakovcic, K, Janicsko Csathy, J, Janutta, B, Jollet, C, Juget, F, Kawai, T, Kazuyama, M, Kim, S, Knuesel, J, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Laktineh, I, Lazzaro, C, Lenkeit, J, Ljubicic, A, Longhin, A, Lutter, G, Manai, K, Mandrioli, G, Marotta, A, Marteau, J, Matsuo, T, Matsuoka, H, Mauri, N, Meisel, F, Meregaglia, A, Messina, M, Migliozzi, P, Mikado, S, Miyamoto, S, Monacelli, P, Morishima, K, Moser, U, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakamura, T, Nakano, T, Nikitina, V, Niwa, K, Nonoyama, Y, Ogawa, S, Osedlo, V, Ossetski, D, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pilipenko, V, Pistillo, C, Polukhina, N, Pozzato, M, Pretzl, K, Publichenko, P, Pupilli, F, Roganova, T, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryazhskaya, O, Ryzhikov, D, Sato, O, Sato, Y, Saveliev, V, Sazhina, G, Schembri, A, Scotto Lavina, L, Shibuya, H, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Sugonyaev, V, Taira, Y, Takahashi, S, Tenti, M, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Tsarev, V, Tufanli, S, Ushida, N, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, Yoshida, J, Zaitsev, Y, Zemskova, S, Zghiche, A, Zimmermann, R, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), OPERA, A. ANOKHINA, S. AOKI, A. ARIGA, L. ARRABITO, D. AUTIERO, A. BADERTSCHER, F. BAY, F. BERSANI GREGGIO, A. BERTOLIN, M. BESNIER, D. BICK, C. BOZZA, T. BRUGIERE, R. BRUGNERA, G. BRUNETTI, S. BUONTEMPO, E. CARRARA, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKY, V. CHIARELLA, N. CHON-SEN, A. CHUKANOV, L. CONSIGLIO, M. COZZI, V. CUHA, F. DAL CORSO, G. D’AMATO, N. D’AMBROSIO, G. DE LELLIS, Y. DÉCLAIS, M. DE SERIO, F. DI CAPUA, D. DI FERDINANDO, A. DI GIOVANNI, N. DI MARCO, C. DI TROIA, S. DMITRIEVSKI, A. DOMINJON, M. DRACOS, D. DUCHESNEAU, S. DUSINI, J. EBERT, O. EGOROV, R. ENIKEEV, A. EREDITATO, L.S. ESPOSITO, J. FAVIER, G. FELICI, T. FERBER, R. FINI, D. FREKERS, T. FUKUDA, V.I. GALKIN, V.A. GALKIN, A. GARFAGNINI, G. GIACOMELLI, M. GIORGINI, C. GOELLNITZ, J. GOLDBERG, D. GOLUBKOV, Y. GORNUSHKIN, G. GRELLA, F. GRIANTI, M. GULER, G. GUSEV, C. GUSTAVINO, C. HAGNER, T. HARA, M. HIERHOLZER, S. HIRAMATSU, K. HOSHINO, M. IEVA, K. JAKOVCIC, J. JANICSKO CSATHY, B. JANUTTA, C. JOLLET, F. JUGET, T. KAWAI, M. KAZUYAMA, S. H. KIM, J. KNUESEL, K. KODAMA, M. KOMATSU, U. KOSE, I. KRESLO, I. LAKTINEH, C. LAZZARO, J. LENKEIT, A. LJUBICIC, A. LONGHIN, G. LUTTER, K. MANAI, G. MANDRIOLI, A. MAROTTA, J. MARTEAU, T. MATSUO, H. MATSUOKA, N. MAURI, F. MEISEL, A. MEREGAGLIA, M. MESSINA, P. MIGLIOZZI, S. MIKADO, S. MIYAMOTO, P. MONACELLI, K. MORISHIMA, U. MOSER, M.T. MUCIACCIA, N. NAGANAWA, T. NAKA, M. NAKAMURA, T. NAKAMURA, T. NAKANO, V. NIKITINA, K. NIWA, Y. NONOYAMA, S. OGAWA, V. OSEDLO, D. OSSETSKI, A. PAOLONI, B.D. PARK, I.G. PARK, A. PASTORE, L. PATRIZII, E. PENNACCHIO, H. PESSARD, V. PILIPENKO, C. PISTILLO, N. POLUKHINA, M. POZZATO, K. PRETZL, P. PUBLICHENKO, F. PUPILLI, T. ROGANOVA, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, A. RUSSO, O. RYAZHSKAYA, D. RYZHIKOV, O. SATO, Y. SATO, V. SAVELIEV, G. SAZHINA, A. SCHEMBRI, L. SCOTTO LAVINA, H. SHIBUYA, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J. S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, V. SUGONYAEV, Y. TAIRA, S. TAKAHASHI, M. TENTI, F. TERRANOVA, I. TEZUKA, V. TIOUKOV, P. TOLUN, V. TSAREV, S. TUFANLI, N. USHIDA, P. VILAIN, M. VLADIMIROV, L. VOTANO, J.L. VUILLEUMIER, G. WILQUET, B. WONSAK, C. S. YOON, J. YOSHIDA, Y. ZAITSEV, S. ZEMSKOVA, A. ZGHICHE, R. ZIMMERMANN, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), and Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Physics - Instrumentation and Detectors, Materials science, Microscope, FISICA DEL NEUTRINO, FOS: Physical sciences, Electron, 01 natural sciences, law.invention, Optics, law, Tau neutrino, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, EMULSIONI NUCLEARI, Photographic emulsion, 010306 general physics, Instrumentation, Mathematical Physics, Interconnection, Detector design and construction technologies and material, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Sample (graphics), Particle tracking detector, Detector alignment and calibration methods (Lasers,Sources,Particle-beams), Large detector systems for particle and astroparticle physic, RIVELATORI IBRIDI, RIVELATORI DI PARTICELLE ELEMENTARI, Neutrino, business
Abstract

New methods for efficient and unambiguous interconnection between electronic counters and target units based on nuclear photographic emulsion films have been developed. The application to the OPERA experiment, that aims at detecting oscillations between mu neutrino and tau neutrino in the CNGS neutrino beam, is reported in this paper. In order to reduce background due to latent tracks collected before installation in the detector, on-site large-scale treatments of the emulsions ("refreshing") have been applied. Changeable Sheet (CSd) packages, each made of a doublet of emulsion films, have been designed, assembled and coupled to the OPERA target units ("ECC bricks"). A device has been built to print X-ray spots for accurate interconnection both within the CSd and between the CSd and the related ECC brick. Sample emulsion films have been extensively scanned with state-of-the-art automated optical microscopes. Efficient track-matching and powerful background rejection have been achieved in tests with electronically tagged penetrating muons. Further improvement of in-doublet film alignment was obtained by matching the pattern of low-energy electron tracks. The commissioning of the overall OPERA alignment procedure is in progress., Comment: 19 pages, 19 figures

Published
2008

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