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409 results on '"Podgrudkov, D. A."'

1. Software Suite for Modeling Cherenkov Images of Extensive Air Showers in the SPHERE-3 Detector

Author: Ivanov, V. A., Galkin, V. I., Bonvech, E. A., Roganova, T. M., Chernov, D. V., Podgrudkov, D. A., Ziva, M. D., Latypova, V. S., Azra, C. G., and Entina, E. L.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The study of cosmic rays in the energy range from 1 to 1000 PeV is crucial for understanding their origins and propagation paths. As part of this research, a new SPHERE-3 installation is being developed, featuring enhanced light sensitivity and optical resolution, based on the experience gained with the balloon-borne SPHERE-2 installation. This report describes a computational complex designed for simulating the formation of Cherenkov light on the detector grid of the SPHERE-3 telescope., Comment: Published as a conference paper at X International Conference on Mathematial Modeling. 4 pages, 1 figure
Published: 2024

2. SPHERE-3: tackling the problem of primary cosmic ray mass composition with a new approach

Author: Galkin, V. I., Azra, C. G., Bonvech, E. A., Chernov, D. V., Entina, E. L., Ivanov, V. I., Latypova, V. S., Podgrudkov, D. A., Roganova, T. M., and Ziva, and M. A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: A new Cherenkov telescope of the SPHERE type is under development. Its main goal is to promote the solution of the problem of the primary cosmic ray mass composition at ultra high energies (1--100 PeV) using a newly developed technique of the primary mass assignment to EAS event on event-by-event basis. The telescope will carry out measurements of both the Cherenkov light reflected from the snow surface as well as the direct one. Sensitivity of the direct Cherenkov images' shapes to the primary mass is demonstrated., Comment: Published as a conference paper at 21st Lomonosov Conference on Elementary Particle Physics. 7 pages, 5 figures
Published: 2024

3. Application of convolutional neural networks for extensive air shower separation in the SPHERE-3 experiment

Author: Entina, E. L., Podgrudkov, D. A., Azra, C. G., Bonvech, E. A., Cherkesova, O. V., Chernov, D. V., Galkin, V. I., Ivanov, V. A., Kolodkin, T. A., Ovcharenko, N. O., Roganova, T. M., and Ziva, M. D.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: A new SPHERE-3 telescope is being developed for cosmic rays spectrum and mass composition studies in the 5--1000 PeV energy range. Registration of extensive air showers using reflected Cherenkov light method applied in the SPHERE detector series requires a good trigger system for accurate separation of events from the background produced by starlight and airglow photons reflected from the snow. Here we present the results of convolutional networks application for the classification of images obtained from Monte Carlo simulation of the detector. Detector response simulations include photons tracing through the optical system, silicon photomultiplier operation and electronics response and digitization process. The results are compared to the SPHERE-2 trigger system performance., Comment: 7 pages, 5 figures Published as a conference paper at DLCP2024, June 19-21, 2024, Moscow, Russia. https://dlcp2024.sinp.msu.ru Submitted to Moscow University Physics Bulletin
Published: 2024

4. Search for High-Energy Gamma Quanta from the Cygnus Cocoon Source in October–November 2020

Author: Okuneva, E., Sveshnikova, L., Astapov, I., Bezyazykov, P., Blinov, A., Borodin, A., Bonvech, E., Budnev, N., Bulan, A., Busygin, P., Vaidyanatan, A., Volkov, N., Volchugov, P., Voronin, D., Gafarov, A., Gres, E., Gres, O., Gres, T., Grishin, O., Garmash, A., Grebenyuk, V., Grinyuk, A., Dyachok, A., Zhurov, D., Zagorodnikov, A., Ivanova, A., Ivanova, A., Ilyushin, M., Kalmykov, N., Kindin, V., Kiryukhin, V., Kokoulin, R., Kolosov, N., Kompaniets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Chiavassa, A., Lavrova, M., Lagutin, A., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Malakhov, S., Mirgazov, R., Monkhoev, R., Osipova, E., Pakhorukov, A., Pan, A., Panov, A., Pankov, L., Petrukhin, A., Podgrudkov, D., Poddubny, I., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Razumov, A., Raikin, R., Rubtsov, G., Ryabov, E., Samoliga, V., Satyshev, I., Silaev, A., Silaev, Jr., A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Tabolenko, V., Tanaev, A., Ternovoy, M., Tkachev, L., Ushakov, N., Chernov, D., and Yashin, I.
Published: 2024
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5. The SPHERE Project: Developing a Technique for Reflected Cherenkov Light

Author: Bonvech, E. A., Chernov, D. V., Latypova, V. S., Azra, C., Galkin, V. I., Ivanov, V. A., Podgrudkov, D. A., and Roganova, T. M.
Published: 2024
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6. Directional Sensitivity of the NEWSdm Experiment to Cosmic Ray Boosted Dark Matter

Author: Agafonova, N. Y., Alexandrov, A., Anokhina, A. M., Asada, T., Ashikhmin, V. V, Boccia, V., Centanni, D., Chernyavskii, M. M., D'Ambrosio, N., De Lellis, G., Di Crescenzo, A., Dowdy, Y. C., Dmitrievski, S., Enikeev, R. I., Galati, G., Galkin, V. I., Golovatiuk, A., Gorbunov, S. A., Gornushkin, Y., Guler, A. M., Gulyaeva, V. V., Iuliano, A., Khalikov, E. V., Kim, S. H., Konovalova, N. S., Krasilnikova, Y. O., Lauria, A., Lee, K. Y., Loschiavo, V. P., Managadze, A. K., Miloi, A., Montesi, M. C., Naka, T., Okateva, N. M., Park, B. D, Podgrudkov, D. A., Polukhina, N. G., Roganova, T. M., Rosa, G., Samoilov, M. A., Sadykov, Z. T., Saeki, K., Sato, O., Shakiryanova, I. R., Shchedrina, T. V., Shiraishi, T., Sohn, J. Y., Sotnikov, A., Starkov, N. I., Starkova, E. N., Strekalina, D. M., Tioukov, V., Ursov, E. D., Ustyuzhanin, A., Vasina, S., Voronkov, R. A., and Yoon, C. S.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present a study of a directional search for Dark Matter boosted forward when scattered by cosmic-ray nuclei, using a module of the NEWSdm experiment. The boosted Dark Matter flux at the edge of the Earth's atmosphere is expected to be pointing to the Galactic Center, with a flux 15 to 20 times larger than in the transverse direction. The module of the NEWSdm experiment consists of a 10 kg stack of Nano Imaging Trackers, i.e.~newly developed nuclear emulsions with AgBr crystal sizes down to a few tens of nanometers. The module is installed on an equatorial telescope. The relatively long recoil tracks induced by boosted Dark Matter, combined with the nanometric granularity of the emulsion, result in an extremely low background. This makes an installation at the INFN Gran Sasso laboratory, both on the surface and underground, viable. A comparison between the two locations is made. The angular distribution of nuclear recoils induced by boosted Dark Matter in the emulsion films at the surface laboratory is expected to show an excess with a factor of 3.5 in the direction of the Galactic Center. This excess allows for a Dark Matter search with directional sensitivity. The surface laboratory configuration prevents the deterioration of the signal in the rock overburden and it emerges as the most powerful approach for a directional observation of boosted Dark Matter with high sensitivity. We show that, with this approach, a 10 kg module of the NEWSdm experiment exposed for one year at the Gran Sasso surface laboratory can probe Dark Matter masses between 1 keV/c$^2$ and 1 GeV/c$^2$ and cross-section values down to $10^{-30}$~cm$^2$ with a directional sensitive search., Comment: 15 pages, 14 figures, updated references, clarified discussion in intro section. Accepted in JCAP
Published: 2023
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7. Updated constraints on sterile neutrino mixing in the OPERA experiment using a new $\nu_e$ identification method

Author: Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.
Subjects: High Energy Physics - Experiment
Abstract: This paper describes a new $\nu_e$ identification method specifically designed to improve the low-energy ($< 30\,\mathrm{GeV}$) $\nu_e$ identification efficiency attained by enlarging the emulsion film scanning volume with the next generation emulsion readout system. A relative increase of 25-70% in the $\nu_e$ low-energy region is expected, leading to improvements in the OPERA sensitivity to neutrino oscillations in the framework of the 3 + 1 model. The method is applied to a subset of data where the detection efficiency increase is expected to be more relevant, and one additional $\nu_e$ candidate is found. The analysis combined with the $\nu_\tau$ appearance results improves the upper limit on $\sin^2 2\theta_{\mu e}$ to 0.016 at 90% C.L. in the MiniBooNE allowed region $\Delta m^2_{41} \sim 0.3\,\mathrm{eV}^2$., Comment: 13 pages, 6 figures
Published: 2022

8. γ-Ray Detection with the TAIGA-IACT Installation in the Stereo Mode of Observation

Author: Volchugov, P. A., Astapov, I. I., Bez’’yazykov, P. A., Bonvech, E. A., Borodin, A. N., Budnev, N. M., Bulan, A. V., Vaidyanatan, A., Volkov, N. V., Voronin, D. M., Gafarov, A. R., Gres’, E. O., Gres’, O. A., Gres’, T. I., Grishin, O. G., Garmash, A. Yu., Grebenyuk, V. M., Grinyuk, A. A., Dyachok, A. N., Zhurov, D. P., Zagorodnikov, A. V., Ivanova, A. D., Ivanova, A. L., Ilyushin, M. A., Kalmykov, N. N., Kindin, V. V., Kiryukhin, S. N., Kokoulin, R. P., Kolosov, N. I., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuz’michev, L. A., K’yavassa, A., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Malakhov, S. D., Mirgazov, R. R., Monkhoev, R. D., Okuneva, E. A., Osipova, E. A., Panov, A. D., Pakhorukov, A. L., Pan, A., Pan’kov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Popova, E. G., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Razumov, A. Yu., Raikin, R. I., Rubtsov, G. I., Ryabov, E. V., Samoliga, V. S., Satyshev, I., Sveshnikova, L. G., Silaev, A. A., Silaev (Jr.), A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Sokolov, A. V., Tabolenko, V. A., Tanaev, A. B., Ternovoi, M. Yu., Tkachev, L. G., Ushakov, N. A., Chernov, D. V., and Yashin, I. I.
Published: 2024
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9. Status of the TAIGA Experiment: Gamma Astronomy

Author: Sveshnikova, L., Astapov, I., Bezyazykov, P., Blinov, A., Bonvech, E., Borodin, A., Budnev, N., Bulan, A., Vaidyanathan, A., Volkov, N., Volchugov, P., Voronin, D., Garmash, A., Gafarov, A., Grebenyuk, V., Gress, E., Gress, O., Gress, T., Grinyuk, A., Grishin, O., Dyachok, A., Zhurov, D., Zagorodnikov, A., Ivanova, A. L., Ilyushin, M., Kalmykov, N., Kindin, V., Kiryukhin, S., Kozhin, V., Kokoulin, R., Kolosov, N., Kompaniets, K., Korosteleva, E., Kravchenko, E., Kryukov, A., Kuzmichev, L., Chiavassa, A., Lavrova, M., Lagutin, A., Lemeshev, Yu., Lubsandorzhiev, B., Lubsandorzhiev, N., Mirgazov, R., Monkhoev, R., Okuneva, E., Osipova, E., Pan, A., Panov, A., Pankov, L., Pakhorukov, A., Petrukhin, A., Podgrudkov, D., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Razumov, A., Raikin, R., Rubtsov, G., Ryabov, E., Samoliga, V., Satyshev, I., Sidorenkov, A., Silaev, A., Silaev, Jr., A., Skurikhin, A., Sokolov, A., Tabolenko, V., Tanaev, A., Ternovoy, M., Tkachev, L., Ushakov, N., Chernov, D., Shipilov, D., and Yashin, I.
Published: 2023
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10. Design of the Simulation Scheme for SPHERE-3 Telescope for the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${10^{15}{-}10^{18}}$$\end{document} eV Primary Cosmic Ray Studies Using Direct and Reflected Cherenkov Light from the Extensive Air Showers

Author: Bonvech, E. A., Azra, C. J., Chernov, D. V., Galkin, V. I., Entina, E. L., Ivanov, V. A., Latypova, V. S., Podgrudkov, D. A., Roganova, T. M., and Ziva, M. D.
Published: 2023
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11. Method for Separating Extensive Air Showers by Primary Mass Using Machine Learning for a Sphere-Type Cherenkov Telescope

Author: Latypova, V. S., Nemchenko, V. A., Azra, C. G., Bonvech, E. A., Chernov, D. V., Galkin, V. I., Ivanov, V. A., Podgrudkov, D. A., and Roganova, T. M.
Published: 2023
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12. Application of the Bootstrap Method in Behavioral Data Analysis and the Data Visualization Method of Choice from Three Objects

Author: Dudorova, A. V., Podgrudkov, D. A., and Kruchenkova, E. P.
Published: 2023
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13. TAIGA -- an advanced hybrid detector complex for astroparticle physics and high energy gamma-ray astronomy

Author: Budnev, N. M., Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Bulan, A., Chernov, D., Chiavassa, A., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, E., Gress, O., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A. D., Ivanova, A. L., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Kompaniets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lavrova, M., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Lukanov, A., Lukyantsev, D., Malakhov, S., Mirgazov, R., Monkhoev, R., Osipova, E., Pakhorukov, A., Pankov, L., Pan, A., Panov, A., Petrukhin, A., Poddubnyi, I., Podgrudkov, D., Ponomareva, V., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A., Rubtsov, G., Ryabov, E., Samoliga, V., Satyshev, A., Silaev, A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tkachev, L., Tanaev, A., Ternovoy, M., Togoo, R., Ushakov, N., Vaidyanathan, A., Volchugov, P., Volkov, N., Voronin, D., Zagorodnikov, A., Zhurov, D., and Yashin, I.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The physical motivations, present status, main results in study of cosmic rays and in the field of gamma-ray astronomy as well future plans of the TAIGA-1 (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) project are presented. The TAIGA observatory addresses ground-based gamma-ray astronomy and astroparticle physics at energies from a few TeV to several PeV, as well as cosmic ray physics from 100 TeV to several EeV. The pilot TAIGA-1 complex is located in the Tunka valley, ~50 km west from the southern tip of the lake Baikal., Comment: Submission to SciPost Phys. Proc., 10 pages, 2 figures
Published: 2022

14. Primary Cosmic Rays Energy Spectrum and Mean Mass Composition by the Data of the TAIGA Astrophysical Complex

Author: Prosin, V., Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Bulan, A., Chiavassa, A., Chernov, D., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, O., Gress, E., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A. D., Ivanova, A. L., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Komponiets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lavrova, M., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Lukanov, A., Lukyantsev, D., Malakhov, S., Mirgazov, R., Monkhoev, R., Okuneva, E., Osipova, E., Pakhorukov, A., Pan, A., Panasenko, L., Pankov, L., Panov, A. D., Petrukhin, A., Poddubny, I., Podgrudkov, D., Poleschuk, V., Ponomareva, V., Popova, E., Postnikov, E., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A., Rubtsov, G., Ryabov, E., Sagan, Y., Samoliga, V., Silaev, A., Silaev Jr, A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tanaev, A., Tarashchansky, B., Ternovoy, M. Y., Tkachev, L., Togoo, R., Ushakov, N., Vaidyanathan, A., Volchugov, P., Volkov, N., Voronin, D., Zagorodnikov, A., Zhaglova, A., Zhurov, D., and Yashin, I.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The corrected dependence of the mean depth of the EAS maximum $X_{max}$ on the energy was obtained from the data of the Tunka-133 array for 7 years and the TAIGA-HiSCORE array for 2 years. The parameter $\langle\ln A\rangle$, characterizing the mean mass compositon was derived from these results. The differential energy spectrum of primary cosmic rays in the energy range of $2\cdot 10^{14}$ - $2\cdot 10^{16}$\,eV was reconstructed using the new parameter $Q_{100}$ the Cherenkov light flux at the core distance 100 m.}, Comment: 6 pages, 3 figures, Submitted to SciPost Phys.Proc
Published: 2022

15. The Tunka-Grande scintillation array: current results

Author: Ivanova, A. L., Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Budnev, N., Bulan, A., Chernov, D., Chiavassa, A., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, E., Gress, O., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A. D., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Kompaniets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lavrova, M., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Lukanov, A., Lukyantsev, D., Malakhov, S., Mirgazov, R., Monkhoev, R., Osipova, E., Pakhorukov, A., Pankov, L., Pan, A., Panov, A., Petrukhin, A., Poddubnyi, I., Podgrudkov, D., Poleschuk, V., Ponomareva, V., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A., Rubtsov, G., Ryabov, E., Sagan, Y., Samoliga, V., Satyshev, A., Silaev, A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tkachev, L., Tanaev, A., Ternovoy, M., Togoo, R., Ushakov, N., Vaidyanathan, A., Volchugov, P., Volkov, N., Voronin, D., Zagorodnikov, A., Zhurov, D., and Yashin, I.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Tunka-Grande experiment is a scintillation array with about 0.5 sq.km sensitive area at Tunka Valley, Siberia, for measuring charged particles and muons in extensive air showers (EASs). Tunka-Grande is optimized for cosmic ray studies in the energy range 10 PeV to about 1 EeV, where exploring the composition is of fundamental importance for understanding the transition from galactic to extragalactic origin of cosmic rays. This paper attempts to provide a synopsis of the current results of the experiment. In particular, the reconstruction of the all-particle energy spectrum in the range of 10 PeV to 1 EeV based on experimental data from four observation seasons is presented., Comment: 7 pages, 3 figures, submission to SciPost Phys. Proc
Published: 2022

16. EAS observation conditions in the SPHERE-2 balloon experiment

Author: Bonvech, E. A., Chernov, D. V., Finger, M., Finger Jr., M., Galkin, V. I., Podgrudkov, D. A., Roganova, T. M., and Vaiman, I. A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The SPHERE project studies primary cosmic rays by detection of the Cherenkov light of extensive air showers reflected from the snowy surface of the earth. Measurements with the aerial-based detector SPHERE-2 were performed in 2011-2013. The detector was lifted by the balloon at altitudes up to 900 m above snowed surface of Lake Baikal, Russia. The results of the experiment are summarized now in a series of papers that opens with this article. An overview of the SPHERE-2 detector telemetry monitoring systems is presented along with the analysis of the measurements conditions including atmosphere profile. The analysis of the detector state and environment atmosphere conditions monitoring provided various cross-checks of detector calibration, positioning and performance., Comment: 11 pages, 20 figures
Published: 2021
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17. Search for Astrophysical Nanosecond Optical Transients with TAIGA-HiSCORE Array

Author: Panov, A. D., Astapov, I. I., Awad, A. K., Beskin, G. M., Bezyazeekov, P. A., Blank, M., Bonvech, E. A., Borodin, A. N., Bruckner, M., Budnev, N. M., Bulan, A. V., Chernov, D. V., Chiavassa, A., Dyachok, A. N., Gafarov, A. R., Garmash, A. Yu., Grebenyuk, V. M., Gress, O. A., Gress, T. I., Grinyuk, A. A., Grishin, O. G., Horns, D., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Krivopalova, A. A., Kuzmichev, L. A., Kryukov, A. P., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Lukanov, A. D., Mirgazov, R. R., Mirzoyan, R., Monkhoev, R. D., Osipova, E. A., Pakhorukov, A. L., Pan, A., Pankov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Poleschuk, V. A., Popova, E. G., Porelli, A., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Raikin, R. I., Razumov, A., Rjabov, E., Rubtsov, G. I., Sagan, Y. I., Samoliga, V. S., Sidorenkov, A. Yu., Silaev, A. A., Skurikhin, A. V., Satyshev, I., Sokolov, A. V., Suvorkin, Y., Sveshnikova, L. G., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M., Tkachev, L. G., Tluczykont, M., Ushakov, N., Vaidyanathan, A., Volchugov, P. A., Volkov, N. V., Voronin, D., Wischnewski, R., Yashin, I. I., Zagorodnikov, A. V., and Zhurov, D. P.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: A wide-angle Cerenkov array TAIGA-HiSCORE (FOV $\sim$0.6 sr), was originally created as a part of TAIGA installation for high-energy gamma-ray astronomy and cosmic ray physics. Array now consist on nearly 100 optical stations on the area of 1 km$^2$. Due to high accuracy and stability ($\sim$1 ns) of time synchronization of the optical stations the accuracy of EAS arrival direction reconstruction is reached 0.1$^\mathrm{o}$. It was proven that the array can also be used to search for nanosecond events of the optical range. The report discusses the method of searching for optical transients using the HiSCORE array and demonstrates its performance on a real example of detecting signals from an artificial Earth satellite. The search for this short flares in the HiSCORE data of the winter season 2018--2019 is carried out. One candidate for double repeater has been detected, but the estimated probability of random simulation of such a transient by background EAS events is not less than 10%, which does not allow us to say that the detected candidate corresponds to a real astrophysical transient. An upper bound on the frequency of optical spikes with flux density of more than $10^{-4} \mathrm{erg/s/cm}^2$ and a duration of more than 5\,ns is established as $\sim 2 \times 10^{-3}$ events/sr/hour., Comment: 15 pages, 6 figures, reported at the conference ISCRA-2021, Accepted for publication in Physics of Atomic Nuclei
Published: 2021
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18. Measurement of the muon flux at the SND@LHC experiment

Author: Albanese, R., Alexandrov, A., Alicante, F., Anokhina, A., Asada, T., Battilana, C., Bay, A., Betancourt, C., Bick, D., Biswas, R., Castro, A. Blanco, Boccia, V., Bogomilov, M., Bonacorsi, D., Bonivento, W. M., Bordalo, P., Boyarsky, A., Buontempo, S., Campanelli, M., Camporesi, T., Canale, V., Castro, A., Centanni, D., Cerutti, F., Chernyavskiy, M., Choi, K. -Y., Cholak, S., Cindolo, F., Climescu, M., Conaboy, A. P., Dallavalle, G. M., Davino, D., de Bryas, P. T., De Lellis, G., De Magistris, M., De Roeck, A., De Rújula, A., De Serio, M., De Simone, D., Crescenzo, A. Di, Donà, R., Durhan, O., Fabbri, F., Fedotovs, F., Ferrillo, M., Ferro-Luzzi, M., Fini, R. A., Fiorillo, A., Fresa, R., Funk, W., Walls, F. M. Garay, Golovatiuk, A., Golutvin, A., Graverini, E., Guler, A. M., Guliaeva, V., Haefeli, G. J., Hagner, C., Herrera, J. C. Helo, van Herwijnen, E., Iengo, P., Ilieva, S., Infantino, A., Iuliano, A., Jacobsson, R., Kamiscioglu, C., Kauniskangas, A. M., Khalikov, E., Kim, S. H., Kim, Y. G., Klioutchnikov, G., Komatsu, M., Konovalova, N., Kuleshov, S., Lacker, H. M., Lantwin, O., Manghi, F. Lasagni, Lauria, A., Lee, K. Y., Lee, K. S., Meo, S. Lo, Loschiavo, V. P., Marcellini, S., Margiotta, A., Mascellani, A., Miano, A., Mikulenko, A., Montesi, M. C., Navarria, F. L., Ogawa, S., Okateva, N., Ovchynnikov, M., Paggi, G., Park, B. D., Pastore, A., Perrotta, A., Podgrudkov, D., Polukhina, N., Prota, A., Quercia, A., Ramos, S., Reghunath, A., Roganova, T., Ronchetti, F., Rovelli, T., Ruchayskiy, O., Ruf, T., Gilarte, M. Sabate, Sadykov, Z., Samoilov, M., Scalera, V., Schmidt-Parzefall, W., Schneider, O., Sekhniaidze, G., Serra, N., Shaposhnikov, M., Shevchenko, V., Shchedrina, T., Shchutska, L., Shibuya, H., Simone, S., Siroli, G. P., Sirri, G., Soares, G., Sohn, J. Y., Sandoval, O. J. Soto, Spurio, M., Starkov, N., Timiryasov, I., Tioukov, V., Tramontano, F., Trippl, C., Ursov, E., Ustyuzhanin, A., Vankova-Kirilova, G., Verguilov, V., Leonardo, N. Viegas Guerreiro, Vilela, C., Visone, C., Wanke, R., Yaman, E., Yazici, C., Yoon, C. S., Zaffaroni, E., and Saa, J. Zamora
Published: 2024
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19. Detection of TeV Emission from the Crab Nebula Using the First Two IACTs in TAIGA in Stereo Mode of Observation

Author: Volchugov, P. A., Astapov, I. I., Bezyazeekov, P. A., Bonvech, E. A., Borodin, A., Budnev, N., Bulan, A. V., Chiavassa, A., Chernov, D. V., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, O., Gress, E., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A. D., Ivanova, A. L., Ilushin, M., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Kolosov, N., Kompaniets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lavrova, M., Lemeshev, Y. E., Lubsandorzhiev, B., Lubsandorzhiev, N., Malakhov, S. D., Mirgazov, R., Monkhoev, R., Osipova, E., Okuneva, E., Pakhorukov, A., Pan, A., Pankov, L., Panov, A. D., Petrukhin, A., Podgrudkov, D. A., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A. Y., Rubtsov, G., Ryabov, E., Samoliga, V., Satyshev, I., Silaev, A., Silaev (junior), A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tanaev, A. A., Ternovoy, M. Y., Tkachev, L., Ushakov, N., Vaidyanathan, A., Volkov, N. V., Voronin, D., Zagorodnikov, A., Yashin, I., and Zhurov, D.
Published: 2023
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20. The TAIGA—a Hybrid Detector Complex in Tunka Valley for Astroparticle Physics, Cosmic Ray Physics and Gamma-Ray Astronomy

Author: Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Budnev, N., Bulan, A., Chernov, D., Chiavassa, A., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, E., Gress, O., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A. D., Ivanova, A. L., Iliushin, M., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Kompaniets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lavrova, M., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Malakhov, S., Mirgazov, R., Monkhoev, R., Okuneva, E., Osipova, E., Pakhorukov, A., Pankov, L., Pan, A., Panov, A., Petrukhin, A., Podgrudkov, D., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A., Rubtsov, G., Ryabov, E., Samoliga, V., Satyshev, I., Silaev, A., Silaev (junior), A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tarashchansky, B., Tkachev, L., Tanaev, A., Ternovoy, M., Ushakov, N., Vaidyanathan, A., Volchugov, P., Volkov, N., Voronin, D., Zagorodnikov, A., Zhurov, D., and Yashin, I.
Published: 2023
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21. Scintillation Experiment on the Study of Cosmic Rays and Gamma Fluxes in the Tunka Valley

Author: Ivanova, A. L., Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Budnev, N., Bulan, A., Chernov, D., Chiavassa, A., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, E., Gress, O., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A. D., Iliushin, M., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Kompaniets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lavrova, M., Lagutin, A., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Malakhov, S., Mirgazov, R., Monkhoev, R., Okuneva, E., Osipova, E., Pakhorukov, A., Pankov, L., Pan, A., Panov, A., Petrukhin, A., Podgrudkov, D., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A., Rubtsov, G., Ryabov, E., Samoliga, V., Satyshev, I., Silaev (junior), A., Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tarashchansky, B., Tkachev, L., Tanaev, A., Ternovoy, M., Ushakov, N., Vaidyanathan, A., Volchugov, P., Volkov, N., Voronin, D., Zagorodnikov, A., Zhurov, D., and Yashin, I.
Published: 2023
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22. Energy Spectrum of Gamma Rays from the Crab Nebula, According to Data from the TAIGA Astrophysical Complex

Author: Sveshnikova, L. G., Volchugov, P. A., Postnikov, E. B., Astapov, I. I., Bezyazeekov, P. A., Bonvech, E. A., Borodin, A. N., Budnev, N. M., Bulan, A. V., Vaidyanathan, A. A., Volkov, N. V., Voronin, D. M., Gafarov, A. R., Gress, E. O., Gress, O. A., Gress, T. I., Grishin, O. G., Garmash, A. Yu., Grebenyuk, V. M., Grinyuk, A. A., Dyachok, A. N., Zhurov, D. P., Zagorodnikov, A. V., Ivanova, A. D., Ivanova, A. L., Iliushin, M. A., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kolosov, N. I., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Chiavassa, A., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Malakhov, S. D., Mirgazov, R. R., Monkhoev, R. D., Okuneva, E. A., Osipova, E. A., Panov, A. D., Pakhorukov, A. L., Pan, A., Pankov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Popova, E. G., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Razumov, A. V., Raikin, R. I., Rubtsov, G. I., Ryabov, E. V., Samoliga, V. S., Satyshev, I., Silaev, A. A., Silaev, Jr., A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Sokolov, A. V., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M. Yu., Tkachev, L. G., Ushakov, N. A., Chernov, D. V., and Yashin, I. I.
Published: 2023
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23. Main Results from the TUNKA-GRANDE Experiment

Author: Monkhoev, R. D., Astapov, I. I., Bezyazeekov, P. A., Bonvech, E. A., Borodin, A. N., Budnev, N. M., Bulan, A. V., Vaidyanathan, A., Volkov, N. V., Volchugov, P. A., Voronin, D. M., Gafarov, A. R., Garmash, A. Yu., Grebenyuk, V. M., Gress, E. O., Gress, O. A., Gress, T. I., Grinyuk, A. A., Grishin, O. G., Dyachok, A. N., Zhurov, D. P., Zagorodnikov, A. V., Ivanova, A. D., Ivanova, A. L., Iliushin, M. A., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kolosov, N. I., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Chiavassa, A., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Malakhov, S. D., Mirgazov, R. R., Okuneva, E. A., Osipova, E. A., Pakhorukov, A. L., Pan, A., Panov, A. D., Pankov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Popova, E. G., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Razumov, A. Yu., Raikin, R. I., Rubtsov, G. I., Rjabov, E. V., Samoliga, V. S., Satyshev, I., Silaev, A. A., Silaev Jr., A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Sokolov, A. V., Sveshnikova, L. G., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M. Yu., Tkachev, L. G., Ushakov, N. A., Chernov, D. V., and Yashin, I. I.
Published: 2023
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24. Sensitivity of the SHiP experiment to dark photons decaying to a pair of charged particles

Author: SHiP Collaboration, Ahdida, C., Akmete, A., Albanese, R., Alexandrov, A., Anokhina, A., Aoki, S., Arduini, G., Atkin, E., Azorskiy, N., Back, J. J., Bagulya, A., Santos, F. Baaltasar Dos, Baranov, A., Bardou, F., Barker, G. J., Battistin, M., Bauche, J., Bay, A., Bayliss, V., Bencivenni, G., Berdnikov, A. Y., Berdnikov, Y. A., Bertani, M., Betancourt, C., Bezshyiko, I., Bezshyyko, O., Bick, D., Bieschke, S., Blanco, A., Boehm, J., Bogomilov, M., Boiarska, I., Bondarenko, K., Bonivento, W. M., Borburgh, J., Boyarsky, A., Brenner, R., Breton, D., Büscher, V., Buonaura, A., Buontempo, S., Cadeddu, S., Calcaterra, A., Calviani, M., Campanelli, M., Casolino, M., Charitonidis, N., Chau, P., Chauveau, J., Chepurnov, A., Chernyavskiy, M., Choi, K. -Y., Chumakov, A., Ciambrone, P., Cicero, V., Congedo, L., Cornelis, K., Cristinziani, M., Crupano, A., Dallavalle, G. M., Datwyler, A., D'Ambrosio, N., D'Appollonio, G., de Asmundis, R., Saraiva, J. De Carvalho, De Lellis, G., de Magistris, M., De Roeck, A., De Serio, M., De Simone, D., Dedenko, L., Dergachev, P., Di Crescenzo, A., Di Giulio, L., Di Marco, N., Dib, C., Dijkstra, H., Dmitrenko, V., Dougherty, L. A., Dolmatov, A., Domenici, D., Donskov, S., Drohan, V., Dubreuil, A., Durhan, O., Ehlert, M., Elikkaya, E., Enik, T., Etenko, A., Fabbri, F., Fedin, O., Fedotovs, F., Felici, G., Ferrillo, M., Ferro-Luzzi, M., Filippov, K., Fini, R. A., Fonte, P., Franco, C., Fraser, M., Fresa, R., Froeschl, R., Fukuda, T., Galati, G., Gall, J., Gatignon, L., Gavrilov, G., Gentile, V., Goddard, B., Golinka-Bezshyyko, L., Golovatiuk, A., Golovtsov, V., Golubkov, D., Golutvin, A., Gorbounov, P., Gorbunov, D., Gorbunov, S., Gorkavenko, V., Gorshenkov, M., Grachev, V., Grandchamp, A. L., Graverini, E., Grenard, J. -L., Grenier, D., Grichine, V., Gruzinskii, N., Guler, A. M., Guz, Yu., Haefeli, G. J., Hagner, C., Hakobyan, H., Harris, I. W., van Herwijnen, E., Hessler, C., Hollnagel, A., Hosseini, B., Hushchyn, M., Iaselli, G., Iuliano, A., Jacobsson, R., Joković, D., Jonker, M., Kadenko, I., Kain, V., Kaiser, B., Kamiscioglu, C., Karpenkov, D., Kershaw, K., Khabibullin, M., Khalikov, E., Khaustov, G., Khoriauli, G., Khotyantsev, A., Kim, Y. G., Kim, V., Kitagawa, N., Ko, J. -W., Kodama, K., Kolesnikov, A., Kolev, D. I., Kolosov, V., Komatsu, M., Kono, A., Konovalova, N., Kormannshaus, S., Korol, I., Korol'ko, I., Korzenev, A., Kostyukhin, V., Platia, E. Koukovini, Kovalenko, S., Krasilnikova, I., Kudenko, Y., Kurbatov, E., Kurbatov, P., Kurochka, V., Kuznetsova, E., Lacker, H. M., Lamont, M., Lanfranchi, G., Lantwin, O., Lauria, A., Lee, K. S., Lee, K. Y., Lévy, J. -M., Loschiavo, V. P., Lopes, L., Sola, E. Lopez, Lyubovitskij, V., Maalmi, J., Magnan, A. -M., Maleev, V., Malinin, A., Manabe, Y., Managadze, A. K., Manfredi, M., Marsh, S., Marshall, A. M., Mefodev, A., Mermod, P., Miano, A., Mikado, S., Mikhaylov, Yu., Milstead, D. A., Mineev, O., Montanari, A., Montesi, M. C., Morishima, K., Movchan, S., Muttoni, Y., Naganawa, N., Nakamura, M., Nakano, T., Nasybulin, S., Ninin, P., Nishio, A., Novikov, A., Obinyakov, B., Ogawa, S., Okateva, N., Opitz, B., Osborne, J., Ovchynnikov, M., Owtscharenko, N., Owen, P. H., Pacholek, P., Paoloni, A., Park, B. D., Pastore, A., Patel, M., Pereyma, D., Perillo-Marcone, A., Petkov, G. L., Petridis, K., Petrov, A., Podgrudkov, D., Poliakov, V., Polukhina, N., Prieto, J. Prieto, Prokudin, M., Prota, A., Quercia, A., Rademakers, A., Rakai, A., Ratnikov, F., Rawlings, T., Redi, F., Ricciardi, S., Rinaldesi, M., Rodin, Volodymyr, Rodin, Viktor, Robbe, P., Cavalcante, A. B. Rodrigues, Roganova, T., Rokujo, H., Rosa, G., Rovelli, T., Ruchayskiy, O., Ruf, T., Samoylenko, V., Samsonov, V., Galan, F. Sanchez, Diaz, P. Santos, Ull, A. Sanz, Saputi, A., Sato, O., Savchenko, E. S., Schliwinski, J. S., Schmidt-Parzefall, W., Serra, N., Sgobba, S., Shadura, O., Shakin, A., Shaposhnikov, M., Shatalov, P., Shchedrina, T., Shchutska, L., Shevchenko, V., Shibuya, H., Shirobokov, S., Shustov, A., Silverstein, S. B., Simone, S., Simoniello, R., Skorokhvatov, M., Smirnov, S., Sohn, J. Y., Sokolenko, A., Solodko, E., Starkov, N., Stoel, L., Stramaglia, M. E., Sukhonos, D., Suzuki, Y., Takahashi, S., Tastet, J. L., Teterin, P., Naing, S. Than, Timiryasov, I., Tioukov, V., Tommasini, D., Torii, M., Tosi, N., Treille, D., Tsenov, R., Ulin, S., Ursov, E., Ustyuzhanin, A., Uteshev, Z., Uvarov, L., Vankova-Kirilova, G., Vannucci, F., Venturi, V., Vilchinski, S., Vincke, Heinz, Vincke, Helmut, Visone, C., Vlasik, K., Volkov, A., Voronkov, R., van Waasen, S., Wanke, R., Wertelaers, P., Williams, O., Woo, J. -K., Wurm, M., Xella, S., Yilmaz, D., Yilmazer, A. U., Yoon, C. S., Zaytsev, Yu., Zelenov, A., and Zimmerman, J.
Subjects: High Energy Physics - Experiment
Abstract: Dark photons are hypothetical massive vector particles that could mix with ordinary photons. The simplest theoretical model is fully characterised by only two parameters: the mass of the dark photon m$_{\gamma^{\mathrm{D}}}$ and its mixing parameter with the photon, $\varepsilon$. The sensitivity of the SHiP detector is reviewed for dark photons in the mass range between 0.002 and 10 GeV. Different production mechanisms are simulated, with the dark photons decaying to pairs of visible fermions, including both leptons and quarks. Exclusion contours are presented and compared with those of past experiments. The SHiP detector is expected to have a unique sensitivity for m$_{\gamma^{\mathrm{D}}}$ ranging between 0.8 and 3.3$^{+0.2}_{-0.5}$ GeV, and $\varepsilon^2$ ranging between $10^{-11}$ and $10^{-17}$.
Published: 2020
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25. Investigation of energy spectrum and chemical composition of primary cosmic rays in 1-100 PeV energy range with a UAV-borne installation

Author: Chernov, D., Bonvech, E., Finger Jr, M., Finger, M., Galkin, V., Ivanov, V., Podgrudkov, D., Roganova, T., and Vaiman, I.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: A new project is developed with the implementation of a relatively new method of studying the primary cosmic ray -- the registration of extensive air showers' optical Vavilov-Cherenkov radiation (Cherenkov light) reflected from the snow surface. The aim of the project is the study of the cosmic ray mass composition in the energy range of 1-100 PeV by detecting the reflected extensive air showers' Cherenkov light. Silicon photomultipliers are planned to be used as the main photosensitive element of the detector and an unmanned aerial vehicle will is planned to lift the measuring equipment over the snow-covered ground., Comment: Procs. of the Instrumentation for Colliding Beam Physics Conference (INSTR20), 24--28 February 2020, Novosibirsk, Russia. Contains 11 pages, 7 figures. Submitted to JINST
Published: 2020
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26. SND@LHC

Author: SHiP Collaboration, Ahdida, C., Akmete, A., Albanese, R., Alexandrov, A., Andreini, M., Anokhina, A., Aoki, S., Arduini, G., Atkin, E., Azorskiy, N., Back, J. J., Bagulya, A., Santos, F. Baaltasar Dos, Baranov, A., Bardou, F., Barker, G. J., Battistin, M., Bauche, J., Bay, A., Bayliss, V., Bencivenni, G., Berdnikov, A. Y., Berdnikov, Y. A., Bertani, M., Bestmann, P., Betancourt, C., Bezshyiko, I., Bezshyyko, O., Bick, D., Bieschke, S., Blanco, A., Boehm, J., Bogomilov, M., Boiarska, I., Bondarenko, K., Bonivento, W. M., Borburgh, J., Boyarsky, A., Brenner, R., Breton, D., Buonocore, L. R., Büscher, V., Buonaura, A., Buontempo, S., Cadeddu, S., Calcaterra, A., Calviani, M., Campanelli, M., Canale, V., Casolino, M., Cerutti, F., Charitonidis, N., Chau, P., Chauveau, J., Chepurnov, A., Chernyavskiy, M., Choi, K. -Y., Chumakov, A., Ciambrone, P., Cicero, V., Congedo, L., Cornelis, K., Cristinziani, M., Crupano, A., Dallavalle, G. M., Datwyler, A., D'Ambrosio, N., D'Appollonio, G., de Asmundis, R., D'Archiac, P. T. De Bryas Dexmiers, Saraiva, J. De Carvalho, De Lellis, G., de Magistris, M., De Roeck, A., De Serio, M., De Simone, D., Dedenko, L., Dergachev, P., Di Crescenzo, A., Di Giulio, L., Di Marco, N., Dib, C., Dijkstra, H., Dmitrenko, V., Dmitrievskiy, S., Dougherty, L. A., Dolmatov, A., Domenici, D., Donskov, S., Drohan, V., Dubreuil, A., Durhan, O., Ehlert, M., Elikkaya, E., Enik, T., Etenko, A., Fabbri, F., Fedin, O., Fedotovs, F., Felici, G., Ferrillo, M., Ferro-Luzzi, M., Filippov, K., Fini, R. A., Fonte, P., Franco, C., Fraser, M., Fresa, R., Froeschl, R., Fukuda, T., Galati, G., Gall, J., Gatignon, L., Gavrilov, G., Gentile, V., Goddard, B., Golinka-Bezshyyko, L., Golovatiuk, A., Golubkov, D., Golutvin, A., Gorbounov, P., Gorbunov, D., Gorbunov, S., Gorkavenko, V., Gorshenkov, M., Grachev, V., Grandchamp, A. L., Graverini, E., Grenard, J. -L., Grenier, D., Grichine, V., Gruzinskii, N., Guler, A. M., Guz, Yu., Haefeli, G. J., Hagner, C., Hakobyan, H., Harris, I. W., van Herwijnen, E., Hessler, C., Hollnagel, A., Hosseini, B., Hushchyn, M., Iaselli, G., Iengo, P., Iuliano, A., Jacobsson, R., Joković, D., Jonker, M., Kadenko, I., Kain, V., Kaiser, B., Kamiscioglu, C., Karpenkov, D., Kershaw, K., Khabibullin, M., Khalikov, E., Khaustov, G., Khoriauli, G., Khotyantsev, A., Kim, Y. G., Kim, V., Kitagawa, N., Ko, J. -W., Kodama, K., Kolesnikov, A., Kolev, D. I., Kolosov, V., Komatsu, M., Kono, A., Konovalova, N., Kormannshaus, S., Korol, I., Korol'ko, I., Korzenev, A., Kostyukhin, V., Platia, E. Koukovini, Kovalenko, S., Krasilnikova, I., Kudenko, Y., Kurbatov, E., Kurbatov, P., Kurochka, V., Kuznetsova, E., Lacker, H. M., Lamont, M., Lanfranchi, G., Lantwin, O., Lauria, A., Lee, K. S., Lee, K. Y., Lévy, J. -M., Loschiavo, V. P., Lopes, L., Sola, E. Lopez, Lyubovitskij, V., Maalmi, J., Magnan, A., Maleev, V., Malinin, A., Manabe, Y., Managadze, A. K., Manfredi, M., Marsh, S., Marshall, A. M., Mefodev, A., Mermod, P., Miano, A., Mikado, S., Mikhaylov, Yu., Milstead, D. A., Mineev, O., Montanari, A., Montesi, M. C., Morishima, K., Movchan, S., Muttoni, Y., Naganawa, N., Nasybulin, S., Ninin, P., Nishio, A., Novikov, A., Obinyakov, B., Ogawa, S., Okateva, N., Opitz, B., Osborne, J., Ovchynnikov, M., Owtscharenko, N., Owen, P. H., Pacholek, P., Paoloni, A., Park, B. D., Passeggio, G., Pastore, A., Patel, M., Pereyma, D., Perillo-Marcone, A., Petkov, G. L., Petridis, K., Petrov, A., Podgrudkov, D., Poliakov, V., Polukhina, N., Prieto, J. Prieto, Prokudin, M., Prota, A., Quercia, A., Rademakers, A., Rakai, A., Ratnikov, F., Rawlings, T., Redi, F., Ricciardi, S., Rinaldesi, M., Rodin, Volodymyr, Rodin, Viktor, Robbe, P., Cavalcante, A. B. Rodrigues, Roganova, T., Rokujo, H., Rosa, G., Rovelli, T., Ruchayskiy, O., Ruf, T., Gilarte, M. Sabate, Samoylenko, V., Samsonov, V., Galan, F. Sanchez, Diaz, P. Santos, Ull, A. Sanz, Saputi, A., Savchenko, E. S., Schliwinski, J. S., Schmidt-Parzefall, W., Schneider, O., Sekhniaidze, G., Serra, N., Sgobba, S., Shadura, O., Shakin, A., Shaposhnikov, M., Shatalov, P., Shchedrina, T., Shchutska, L., Shevchenko, V., Shibuya, H., Shihora, L., Shirobokov, S., Shustov, A., Silverstein, S. B., Simone, S., Simoniello, R., Skorokhvatov, M., Smirnov, S., Sohn, J. Y., Sokolenko, A., Solodko, E., Starkov, N., Stoel, L., Stramaglia, M. E., Strekalina, D., Sukhonos, D., Suzuki, Y., Takahashi, S., Tastet, J. L., Teterin, P., Naing, S. Than, Timiryasov, I., Tioukov, V., Tommasini, D., Torii, M., Tosi, N., Tramontano, F., Treille, D., Tsenov, R., Ulin, S., Ursov, E., Ustyuzhanin, A., Uteshev, Z., Vankova-Kirilova, G., Vannucci, F., Vendeuvre, C., Venturi, V., Vilchinski, S., Vincke, Heinz, Vincke, Helmut, Visone, C., Vlasik, K., Volkov, A., Voronkov, R., van Waasen, S., Wanke, R., Wertelaers, P., Williams, O., Woo, J. -K., Wurm, M., Xella, S., Yilmaz, D., Yilmazer, A. U., Yoon, C. S., Zaytsev, Yu., and Zimmerman, J.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: We propose to build and operate a detector that, for the first time, will measure the process $pp\to\nu X$ at the LHC and search for feebly interacting particles (FIPs) in an unexplored domain. The TI18 tunnel has been identified as a suitable site to perform these measurements due to very low machine-induced background. The detector will be off-axis with respect to the ATLAS interaction point (IP1) and, given the pseudo-rapidity range accessible, the corresponding neutrinos will mostly come from charm decays: the proposed experiment will thus make the first test of the heavy flavour production in a pseudo-rapidity range that is not accessible by the current LHC detectors. In order to efficiently reconstruct neutrino interactions and identify their flavour, the detector will combine in the target region nuclear emulsion technology with scintillating fibre tracking layers and it will adopt a muon identification system based on scintillating bars that will also play the role of a hadronic calorimeter. The time of flight measurement will be achieved thanks to a dedicated timing detector. The detector will be a small-scale prototype of the scattering and neutrino detector (SND) of the SHiP experiment: the operation of this detector will provide an important test of the neutrino reconstruction in a high occupancy environment., Comment: Letter of Intent
Published: 2020

27. The SPHERE-2 detector for observation of extensive air showers in 1 PeV -- 1 EeV energy range

Author: Antonov, R. A., Bonvech, E. A., Chernov, D. V., Dzhatdoev, T. A., Finger Jr., M., Finger, M., Podgrudkov, D. A., Roganova, T. M., Shirokov, A. V., and Vaiman, I. A.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Physics - Instrumentation and Detectors
Abstract: The SPHERE-2 balloon-borne detector designed for extensive air shower (EAS) observations using EAS optical Vavilov-Cherenkov radiation (``Cherenkov light''), reflected from the snow-covered surface of Lake Baikal is described. We briefly discuss the concept behind the reflected Cherenkov light method, characterize the conditions at the experimental site and overview the construction of the tethered balloon used to lift the SPHERE-2 telescope above the surface. This paper is mainly dedicated to a detailed technical description of the detector, including its optical system, sensitive elements, electronics, and data acquisition system (DAQ). The results of some laboratory and field tests of the optical system are presented., Comment: 13 pages, 18 figures
Published: 2019
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28. First observation of a tau neutrino charged current interaction with charm production in the Opera experiment

Author: Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., ić, K. Jakovč, Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., ek, B. Klič, Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., ević, M. Stipč, Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.
Subjects: High Energy Physics - Experiment
Abstract: An event topology with two secondary vertices compatible with the decay of short-lived particles was found in the analysis of neutrino interactions in the Opera target. The observed topology is compatible with tau neutrino charged current (CC) interactions with charm production and neutrino neutral current (NC) interactions with $c\overline{c}$ pair production. However, other processes can mimic this topology. A dedicated analysis was implemented to identify the underlying process. A Monte Carlo simulation was developed and complementary procedures were introduced in the kinematic reconstruction. A multivariate analysis technique was used to achieve an optimal separation of signal from background. Most likely, this event is a $\nu_{\tau}$ CC interaction with charm production, the tau and charm particle decaying into 1 prong and 2 prongs, respectively. The significance of this observation is evaluated., Comment: 10 pages, 7 figures; Editors: Marco Roda, Chiara Sirignano and Gabriele Sirri
Published: 2019
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29. Energy Spectrum of Primary Cosmic Rays According to the Data of the TAIGA Astrophysical Complex

Author: Prosin, V. V., Astapov, I. I., Bezyazeekov, P. A., Bonvech, E. A., Borodin, A. N., Budnev, N. M., Bulan, A. V., Chernov, D. V., Chiavassa, A., Dyachok, A. N., Gafarov, A. R., Garmash, A. Yu., Grebenyuk, V. M., Gress, E. O., Gress, O. A., Gress, T. I., Grinyuk, A. A., Grishin, O. G., Iliushin, M. A., Ivanova, A. D., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kolosov, N. I., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Malakhov, S. D., Mirgazov, R. R., Monkhoev, R. A., Okuneva, E. A., Osipova, E. A., Pakhorukov, A. L., Pan, A., Panov, A. D., Pankov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Popova, E. G., Postnikov, E. B., Ptuskin, V. S., Pushnin, A. A., Raikin, R. I., Razumov, A. V., Rjabov, E. V., Rubtsov, G. I., Samoliga, V. S., Satyshev, I., Sidorenkov, A. Yu., Silaev, A. A., Silaev, Jr., A. A., Skurikhin, A. V., Sokolov, A. V., Sveshnikova, L. G., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M. Yu., Tkachev, L. G., Ushakov, N. A., Vaidyanathan, A., Volkov, N. V., Volchugov, P. A., Voronin, D. M., Yashin, I. I., Zagorodnikov, A. V., and Zhurov, D. P.
Published: 2023
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30. SPHERE-3 Project for Studying the Composition of Primary Cosmic Rays in the Energy Range Between 1 and 1000 PeV

Author: Chernov, D. V., Azra, C, Bonvech, E. A., Galkin, V. I., Ivanov, V. A., Latypova, V. S., Podgrudkov, D. A., and Roganova, T. M.
Published: 2022
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31. Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

Author: OPERA Collaboration, Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: The OPERA experiment has conclusively observed the appearance of tau neutrinos in the muon neutrino CNGS beam. Exploiting the OPERA detector capabilities, it was possible to isolate high purity samples of $\nu_{e}$, $\nu_{\mu}$ and $\nu_{\tau}$ charged current weak neutrino interactions, as well as neutral current weak interactions. In this Letter, the full dataset is used for the first time to test the three-flavor neutrino oscillation model and to derive constraints on the existence of a light sterile neutrino within the framework of the $3+1$ neutrino model. For the first time, tau and electron neutrino appearance channels are jointly used to test the sterile neutrino hypothesis. A significant fraction of the sterile neutrino parameter space allowed by LSND and MiniBooNE experiments is excluded at 90% C.L. In particular, the best-fit values obtained by MiniBooNE combining neutrino and antineutrino data are excluded at 3.3 $\sigma$ significance., Comment: 7 pages, 4 figures; Editors: Budimir Kli\v{c}ek and Matteo Tenti
Published: 2019
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32. Spatial and temporal structure of EAS reflected Cherenkov light signal

Author: Antonov, R. A., Bonvech, E. A., Chernov, D. V., Dzhatdoev, T. A., Galkin, V. I., Podgrudkov, D. A., and Roganova, T. M.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: A compact device lifted over the ground surface might be used to observe optical radiation of extensive air showers (EAS). Here we consider spatial and temporal characteristics of Vavilov-Cherenkov radiation ("Cherenkov light") reflected from the snow surface of Lake Baikal, as registered by the SPHERE-2 detector. We perform detailed full direct Monte Carlo simulations of EAS development and present a dedicated highly modular code intended for detector response simulations. Detector response properties are illustrated by example of several model EAS events. The instrumental acceptance of the SPHERE-2 detector was calculated for a range of observation conditions. We introduce the concept of "composite model quantities", calculated for detector responses averaged over photoelectron count fluctuations, but retaining EAS development fluctuations. The distortions of EAS Cherenkov light lateral distribution function (LDF) introduced by the SPHERE-2 telescope are understood by comparing composite model LDF with the corresponding function as would be recorded by an ideal detector situated at the ground surface. We show that the uncertainty of snow optical properties does not change our conclusions, and, moreover, that the expected performance of the SPHERE experiment in the task of cosmic ray mass composition study in the energy region $\sim$10 PeV is comparable with other contemporary experiments. Finally, we compare the reflected Cherenkov light method with other experimental techniques and briefly discuss its prospects., Comment: To appear in Astroparticle Physics; 19 pages, 32 figures. This is the author's version of the paper
Published: 2019
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33. Latest results of the OPERA experiment on nu-tau appearance in the CNGS neutrino beam

Author: Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Longhin, A., Loverre, P., Malenica, M., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Olchevsky, A., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sadovsky, A., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Ustyuzhanin, A., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., and Yoon, C. S.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: OPERA is a long-baseline experiment designed to search for $\nu_{\mu}\to\nu_{\tau}$ oscillations in appearance mode. It was based at the INFN Gran Sasso laboratory (LNGS) and took data from 2008 to 2012 with the CNGS neutrino beam from CERN. After the discovery of $\nu_\tau$ appearance in 2015, with $5.1\sigma$ significance, the criteria to select $\nu_\tau$ candidates have been extended and a multivariate approach has been used for events identification. In this way the statistical uncertainty in the measurement of the oscillation parameters and of $\nu_\tau$ properties has been improved. Results are reported., Comment: 7 pages, 1 figure, conference: The 15th International Workshop on Tau Lepton Physics (tau2018)AB
Published: 2018

34. Measurement of the cosmic ray muon flux seasonal variation with the OPERA detector

Author: Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gorbunov, S., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovčić, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Kliček, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubičić, A., Longhin, A., Loverre, P., Malgin, A., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Ogawa, S., Okateva, N., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipčević, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: The OPERA experiment discovered muon neutrino into tau neutrino oscillations in appearance mode, detecting tau leptons by means of nuclear emulsion films. The apparatus was also endowed with electronic detectors with tracking capability, such as scintillator strips and resistive plate chambers. Because of its location, in the underground Gran Sasso laboratory, under 3800 m.w.e., the OPERA detector has also been used as an observatory for TeV muons produced by cosmic rays in the atmosphere. In this paper the measurement of the single muon flux modulation and of its correlation with the seasonal variation of the atmospheric temperature are reported.
Published: 2018
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35. Final results of the OPERA experiment on $\nu_\tau$ appearance in the CNGS beam

Author: OPERA Collaboration, Agafonova, N., Alexandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gornushkin, Y., Gorbunov, S., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Okateva, N., Olchevsky, A., Ogawa, S., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sadovsky, A., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibuya, H., Shibayama, E., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Ustyuzhanin, A., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., and Yoon, C. S.
Subjects: High Energy Physics - Experiment
Abstract: The OPERA experiment was designed to study $\nu_\mu\to\nu_\tau$ oscillations in appearance mode in the CNGS neutrino beam. In this letter we report the final analysis of the full data sample collected between 2008 and 2012, corresponding to $17.97\cdot 10^{19}$ protons on target. Selection criteria looser than in previous analyses have produced ten $\nu_\tau$ candidate events, thus reducing the statistical uncertainty in the measurement of the oscillation parameters and of $\nu_\tau$ properties. A multivariate approach for event identification has been applied to the candidate events and the discovery of $\nu_\tau$ appearance is confirmed with an improved significance level of 6.1 $\sigma$. $\Delta m^2_{23}$ has been measured, in appearance mode, with an accuracy of 20%. The measurement of $\nu_\tau$ CC cross-section, for the first time with a negligible contamination from $\bar{\nu}_\tau$, and the first direct observation of the $\nu_\tau$ lepton number are also reported., Comment: 7 pages, 3 figures
Published: 2018
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36. Final results of the search for $\nu_{\mu} \to \nu_{e}$ oscillations with the OPERA detector in the CNGS beam

Author: OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Favier, J., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Gentile, V., Goldberg, J., Gornushkin, Y., Gorbunov, S., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, T., Hollnagel, A., Hosseini, B., Ishiguro, K., Iuliano, A., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meisel, F., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Niwa, K., Okateva, N., Ogawa, S., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, I., Shchedrina, T., Shibuya, H., Shibayama, E., Shiraishi, T., Simone, S., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., and Yoon, C. S.
Subjects: High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract: The OPERA experiment has discovered the tau neutrino appearance in the CNGS muon neutrino beam, in agreement with the 3 neutrino flavour oscillation hypothesis. The OPERA neutrino interaction target, made of Emulsion Cloud Chamber, was particularly efficient in the reconstruction of electromagnetic showers. Moreover, thanks to the very high granularity of the emulsion films, showers induced by electrons can be distinguished from those induced by $\pi^0$s, thus allowing the detection of charged current interactions of electron neutrinos. In this paper the results of the search for electron neutrino events using the full dataset are reported. An improved method for the electron neutrino energy estimation is exploited. Data are compatible with the 3 neutrino flavour mixing model expectations and are used to set limits on the oscillation parameters of the 3+1 neutrino mixing model, in which an additional mass eigenstate $m_{4}$ is introduced. At high $\Delta m^{2}_{41}$ $( \gtrsim 0.1~\textrm{eV}^{2})$, an upper limit on $\sin^2 2\theta_{\mu e}$ is set to 0.021 at 90% C.L. and $\Delta m^2_{41} \gtrsim 4 \times 10^{-3}~\textrm{eV}^{2}$ is excluded for maximal mixing in appearance mode., Comment: Editors: M. Tenti and S. Vasina
Published: 2018

37. TAIGA—A hybrid array for high energy gamma-ray astronomy and cosmic-ray physics

Author: Budnev, N., Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Bulan, A., Chiavassa, A., Chernov, D., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, O., Gress, E., Gress, T., Grinyuk, A., Grishin, O., Ivanova, A.D., Ivanova, A.L., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Komponiets, K., Korosteleva, E., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lavrova, M., Lemeshev, Y., Lubsandorzhiev, B., Lubsandorzhiev, N., Lukanov, A., Lukyantsev, D., Malakhov, S., Mirgazov, R., Monkhoev, R., Okuneva, E., Osipova, E., Pakhorukov, A., Pan, A., Panasenko, L., Pankov, L., Panov, A.D., Petrukhin, A., Poddubny, I., Podgrudkov, D., Poleschuk, V., Ponomareva, V., Popova, E., Postnikov, E., Prosin, V., Ptuskin, V., Pushnin, A., Raikin, R., Razumov, A., Rubtsov, G., Ryabov, E., Sagan, Y., Samoliga, V., Silaev, A., Silaev, A., Junior, Sidorenkov, A., Skurikhin, A., Sokolov, A., Sveshnikova, L., Tabolenko, V., Tanaev, A., Tarashchansky, B., Ternovoy, M.Y., Tkachev, L., Togoo, R., Ushakov, N., Vaidyanathan, A., Volchugov, P., Volkov, N., Voronin, D., Zagorodnikov, A., Zhaglova, A., Zhurov, D., and Yashin, I.
Published: 2022
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38. Cosmic-Ray Research at the TAIGA Astrophysical Facility: Results and Plans

Author: Astapov, I. I., Bezyazeekov, P. A., Blank, M., Bonvech, E. A., Borodin, A. N., Brückner, M., Budnev, N. M., Bulan, A. V., Vaidyanathan, A., Vishnevsky, R., Volkov, N. V., Volchugov, P. A., Voronin, D. M., Gafarov, A. R., Gress, O. A., Gress, T. I., Grishin, O. G., Garmash, A. Yu., Grebenyuk, V. M., Grinyuk, A. A., Dyachok, A. N., Zhurov, D. P., Zagorodnikov, A. V., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryukhin, S. N., Kokoulin, R. P., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Chiavassa, A., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Mirgazov, R. R., Mirzoyan, R., Monkhoev, R. D., Osipova, E. A., Pakhorukov, A. L., Pan, A., Panasyuk, M. I., Pankov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Poleshchuk, V. A., Popova, E. G., Porelli, A., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Razumov, A. V., Raikin, R. I., Rubtsov, G. I., Ryabov, E. V., Sagan, Ya. I., Samoliga, V. S., Satyshev, I., Silaev, A. A., Silayev, Jr., A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Sokolov, A. V., Sveshnikova, L. G., Suvorkin, Ya. V., Tabolenko, V. A., Tanaev, A. B., Tarashchansky, B. A., Ternovoi, M. Yu., Tkachev, L. G., Tluczykont, M., Ushakov, N. A., Horns, D., Chernov, D. V., and Yashin, I. I.
Published: 2022
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39. Astroclimate of the High Mountain Plains of the Greater Altai, According to Satellite Remote Sensing Data: Potential for Deploying a Full-Scale Gamma Astronomy Experiment

Author: Mordvin, E. Yu., Volkov, N. V., Revyakin, A. I., Togoo, R., Astapov, I. I., Bezyazeekov, P. A., Blank, M., Bonvech, E. A., Borodin, A. N., Bruchner, M., Budnev, N. M., Bulan, A., Vaidyanathan, A., Wischnewski, R., Volchugov, P. A., Voronin, D. M., Garmash, A. Yu., Gafarov, A. R., Grebenyuk, V. M., Gress, O. A., Gress, T. I., Grinyuk, A. A., Grishin, O. G., Dyachok, A. N., Zhurov, D. P., Zagorodnikov, A. V., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Chiavassa, A., Lagutin, A. A., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Mirgazov, R. R., Mirzoyan, R., Monkhoev, R. D., Osipova, E. A., Pakhorukov, A. L., Pan, A., Panasyuk, M. I., Pankov, L. V., Petrukhin, A. A., Podgrudkov, D. A., Poleschuk, V. A., Popescu, M., Popova, E. G., Porelli, A., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Raikin, R. I., Rubtsov, G. I., Ryabov, E. V., Sagan, Y. I., Samoliga, V. S., Sveshnikova, L. G., Silaev, A. A., Silaev, Jr., A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Slunecka, M., Sokolov, A. V., Suvorkin, Ya. V., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M. Yu., Tkachev, L. G., Tluczykont, M., Ushakov, N. A., Horns, D., Chernov, D. V., and Yashin, I. I.
Published: 2022
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40. Discovery potential for directional Dark Matter detection with nuclear emulsions

Author: Agafonova, N., Aleksandrov, A., Anokhina, A., Asada, T., Ashikhmin, V. V., Bodnarchuk, I., Buonaura, A., Chernyavskii, M., Chukanov, A., D'Ambrosio, N., De Lellis, G., Di Crescenzo, A., Di Marco, N., Dmitrievski, S., Enikeev, R. I., Fini, R. A., Galati, G., Gentile, V., Gorbunov, S., Gornushkin, Y., Guler, A. M., Ichiki, H., Katsuragawa, T., Konovalova, N., Kuge, K., Lauria, A., Lee, K. Y., Lista, L., Malgin, A. S., Managadze, A., Monacelli, P., Montesi, M. C., Naka, T., Okateva, N., Park, B. D., Podgrudkov, D., Polukhina, N., Pupilli, F., Roganova, T., Rogozhnikov, A., Rosa, G., Ryazhskaya, O. G., Sato, O., Shakiryanova, I. R., Shchedrina, T., Sirignano, C., Sohn, J. Y., Sotnikov, A., Starkov, N., Strolin, P., Tioukov, V., Umemoto, A., Ustyuzhanin, A., Yoon, C. S., Yoshimoto, M., and Vasina, S.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract: Direct Dark Matter searches are nowadays one of the most fervid research topics with many experimental efforts devoted to the search for nuclear recoils induced by the scattering of Weakly Interactive Massive Particles (WIMPs). Detectors able to reconstruct the direction of the nucleus recoiling against the scattering WIMP are opening a new frontier to possibly extend Dark Matter searches beyond the neutrino background. Exploiting directionality would also prove the galactic origin of Dark Matter with an unambiguous signal-to-background separation. Indeed, the angular distribution of recoiled nuclei is centered around the direction of the Cygnus constellation, while the background distribution is expected to be isotropic. Current directional experiments are based on gas TPC whose sensitivity is limited by the small achievable detector mass. In this paper we present the discovery potential of a directional experiment based on the use of a solid target made of newly developed nuclear emulsions and of optical read-out systems reaching unprecedented nanometric resolution., Comment: 8 pages, 12 figures
Published: 2017
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41. The active muon shield in the SHiP experiment

Author: SHiP collaboration, Akmete, A., Alexandrov, A., Anokhina, A., Aoki, S., Atkin, E., Azorskiy, N., Back, J. J., Bagulya, A., Baranov, A., Barker, G. J., Bay, A., Bayliss, V., Bencivenni, G., Berdnikov, A. Y., Berdnikov, Y. A., Bertani, M., Betancourt, C., Bezshyiko, I., Bezshyyko, O., Bick, D., Bieschke, S., Blanco, A., Boehm, J., Bogomilov, M., Bondarenko, K., Bonivento, W. M., Boyarsky, A., Brenner, R., Breton, D., Brundler, R., Bruschi, M., Büscher, V., Buonaura, A., Buontempo, S., Cadeddu, S., Calcaterra, A., Campanelli, M., Chauveau, J., Chepurnov, A., Chernyavsky, M., Choi, K. -Y., Chumakov, A., Ciambrone, P., Dallavalle, G. M., D'Ambrosio, N., D'Appollonio, G., De Lellis, G., De Roeck, A., De Serio, M., Dedenko, L., Di Crescenzo, A., Di Marco, N., Dib, C., Dijkstra, H., Dmitrenko, V., Domenici, D., Donskov, S., Dubreuil, A., Ebert, J., Enik, T., Etenko, A., Fabbri, F., Fabbri, L., Fedin, O., Fedorova, G., Felici, G., Ferro-Luzzi, M., Fini, R. A., Fonte, P., Franco, C., Fukuda, T., Galati, G., Gavrilov, G., Gerlach, S., Golinka-Bezshyyko, L., Golubkov, D., Golutvin, A., Gorbunov, D., Gorbunov, S., Gorkavenko, V., Gornushkin, Y., Gorshenkov, M., Grachev, V., Graverini, E., Grichine, V., Guler, A. M., Guz, Yu., Hagner, C., Hakobyan, H., van Herwijnen, E., Hollnagel, A., Hosseini, B., Hushchyn, M., Iaselli, G., Iuliano, A., Jacobsson, R., Jonker, M., Kadenko, I., Kamiscioglu, C., Kamiscioglu, M., Khabibullin, M., Khaustov, G., Khotyantsev, A., Kim, S. H., Kim, V., Kim, Y. G., Kitagawa, N., Ko, J. -W., Kodama, K., Kolesnikov, A., Kolev, D. I., Kolosov, V., Komatsu, M., Konovalova, N., Korkmaz, M. A., Korol, I., Korol'ko, I., Korzenev, A., Kovalenko, S., Krasilnikova, I., Krivova, K., Kudenko, Y., Kurochka, V., Kuznetsova, E., Lacker, H. M., Lai, A., Lanfranchi, G., Lantwin, O., Lauria, A., Lebbolo, H., Lee, K. Y., Lévy, J. -M., Likacheva, V., Lopes, L., Lyubovitskij, V., Maalmi, J., Magnan, A., Maleev, V., Malinin, A., Mefodev, A., Mermod, P., Mikado, S., Mikhaylov, Yu., Milstead, D. A., Mineev, O., Montanari, A., Montesi, M. C., Morishima, K., Movchan, S., Naganawa, N., Nakamura, M., Nakano, T., Novikov, A., Obinyakov, B., Ogawa, S., Okateva, N., Owen, P. H., Paoloni, A., Park, B. D., Paparella, L., Pastore, A., Patel, M., Pereyma, D., Petrenko, D., Petridis, K., Podgrudkov, D., Poliakov, V., Polukhina, N., Prokudin, M., Prota, A., Rademakers, A., Ratnikov, F., Rawlings, T., Razeti, M., Redi, F., Ricciardi, S., Roganova, T., Rogozhnikov, A., Rokujo, H., Rosa, G., Rovelli, T., Ruchayskiy, O., Ruf, T., Samoylenko, V., Saputi, A., Sato, O., Savchenko, E. S., Schmidt-Parzefall, W., Serra, N., Shakin, A., Shaposhnikov, M., Shatalov, P., Shchedrina, T., Shchutska, L., Shevchenko, V., Shibuya, H., Shustov, A., Silverstein, S. B., Simone, S., Skorokhvatov, M., Smirnov, S., Sohn, J. Y., Sokolenko, A., Starkov, N., Storaci, B., Strolin, P., Takahashi, S., Timiryasov, I., Tioukov, V., Tosi, N., Treille, D., Tsenov, R., Ulin, S., Ustyuzhanin, A., Uteshev, Z., Vankova-Kirilova, G., Vannucci, F., Venkova, P., Vilchinski, S., Villa, M., Vlasik, K., Volkov, A., Voronkov, R., Wanke, R., Woo, J. -K., Wurm, M., Xella, S., Yilmaz, D., Yilmazer, A. U., Yoon, C. S., and Zaytsev, Yu.
Subjects: Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract: The SHiP experiment is designed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. An essential task for the experiment is to keep the Standard Model background level to less than 0.1 event after $2\times 10^{20}$ protons on target. In the beam dump, around $10^{11}$ muons will be produced per second. The muon rate in the spectrometer has to be reduced by at least four orders of magnitude to avoid muon-induced combinatorial background. A novel active muon shield is used to magnetically deflect the muons out of the acceptance of the spectrometer. This paper describes the basic principle of such a shield, its optimization and its performance., Comment: 8 pages, 5 figures; added clarifications to the penalty function and emphasized that we care about neutrino interactions in the air
Published: 2017
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42. Status and First Results of TAIGA

Author: Tluczykont, M., Astapov, I. I., Awad, A. K., Bezyazeekov, P. A., Blank, M., Bonvech, E. A., Borodin, A. N., Bulan, A. V., Brückner, M., Budnev, N. M., Chiavassa, A., Chernov, D. V., Dyachok, A. N., Gafarov, A. R., Garmash, A. Yu., Grebenyuk, V. M., Gress, O. A., Gress, E., Gress, T. I., Grishin, O. G., Grinyuk, A. A., Horns, D., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Lagutin, A. A., Lavrova, M., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Lukanov, A. D., Lukyantsev, D. S., Mirgazov, R. R., Mirzoyan, R., Monkhoev, R. D., Osipova, E. A., Pakhorukov, A. L., Pan, A., Panasenko, L. A., Pankov, L. V., Panov, A. D., Petrukhin, A. A., Podgrudkov, D. A., Poleschuk, V. A., Popova, E. G., Porelli, A., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Raikin, R. I., Razumov, A. Y., Rubtsov, G. I., Ryabov, E. V., Sagan, Y. I., Samoliga, V. S., Semeney, Yu. A., Silaev, A. A., Silaev, Jr., A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Slunecka, M., Sokolov, A. V., Suvorkin, Y., Sveshnikova, L. G., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M., Tkachev, L. G., Ushakov, N., Vaidyanathan, A., Volchugov, P. A., Volkov, N. V., Voronin, D., Wischnewski, R., Yashin, I. I., Zagorodnikov, A. V., and Zhurov, D. P.
Published: 2021
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43. Cosmic Ray Study at the Astrophysical Complex TAIGA: Results and Plans

Author: Kuzmichev, L. A., Astapov, I. I., Bezyazeekov, P. A., Blank, M., Bonvech, E. A., Borodin, A. N., Brueckner, M., Budnev, N. M., Bulan, A. V., Chernov, D. V., Chiavassa, A., Dyachok, A. N., Gafarov, A. R., Garmash, A. Yu., Grebenyuk, V. M., Gress, O. A., Gress, T. I., Grinyuk, A. A., Grishin, O. G., Horns, D., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. P., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Lagutin, A. A., Lavrova, M. V., Lemeshev, Yu., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Lukanov, A. D., Lukyantsev, D., Mirgazov, R. R., Mirzoyan, R., Monkhoev, R. D., Osipova, E. A., Pakhorukov, A. L., Pan, A., Pankov, L. V., Panov, A. D., Petrukhin, A. A., Podgrudkov, D. A., Poleschuk, V. A., Popova, E. G., Porelli, A., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Raikin, R. I., Razumov, A., Rjabov, E., Rubtsov, G. I., Sagan, Y. I., Samoliga, V. S., Sidorenkov, A. Yu., Silaev, A. A., Silaev, Jr., A. A., Skurikhin, A. V., Slunecka, M., Sokolov, A. V., Suvorkin, Y., Sveshnikova, L. G., Tabolenko, V. A., Tanaev, A. B., Tarashansky, B. A., Ternovoy, M., Tkachev, L. G., Tluczykont, M., Ushakov, N., Vaidyanathan, A., Volchugov, P. A., Volkov, N. V., Voronin, D., Wischnewski, R., Yashin, I. I., Zagorodnikov, A. V., and Zhurov, D. P.
Published: 2021
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44. NEWS: Nuclear Emulsions for WIMP Search

Author: Aleksandrov, A., Anokhina, A., Asada, T., Bender, D., Bodnarchuk, I., Buonaura, A., Buontempo, S., Chernyavskii, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Di Crescenzo, A., Di Marco, N., Dmitrievski, S., Dzhatdoev, T., Fini, R. A., Furuya, S., Galati, G., Gentile, V., Gorbunov, S., Gornushkin, Y., Guler, A. M., Ichiki, H., Kamiscioglu, C., Kamiscioglu, M., Katsuragawa, T., Kimura, M., Konovalova, N., Kuge, K., Lauria, A., Loverre, P., Machii, S., Managadze, A., Monacelli, P., Montesi, M. C., Naka, T., Nakamura, M., Nakano, T., Pastore, A., Podgrudkov, D., Polukhina, N., Pupilli, F., Roganova, T., Rosa, G., Sato, O., Shchedrina, T., Simone, S., Sirignano, C., Sotnikov, A., Starkov, N., Strolin, P., Tawara, Y., Tioukov, V., Umemoto, A., Vladymyrov, M., Yoshimoto, M., and Zemskova, S.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract: Nowadays there is compelling evidence for the existence of dark matter in the Universe. A general consensus has been expressed on the need for a directional sensitive detector to confirm, with a complementary approach, the candidates found in conventional searches and to finally extend their sensitivity beyond the limit of neutrino-induced background. We propose here the use of a detector based on nuclear emulsions to measure the direction of WIMP-induced nuclear recoils. The production of nuclear emulsion films with nanometric grains is established. Several measurement campaigns have demonstrated the capability of detecting sub-micrometric tracks left by low energy ions in such emulsion films. Innovative analysis technologies with fully automated optical microscopes have made it possible to achieve the track reconstruction for path lengths down to one hundred nanometers and there are good prospects to further exceed this limit. The detector concept we propose foresees the use of a bulk of nuclear emulsion films surrounded by a shield from environmental radioactivity, to be placed on an equatorial telescope in order to cancel out the effect of the Earth rotation, thus keeping the detector at a fixed orientation toward the expected direction of galactic WIMPs. We report the schedule and cost estimate for a one-kilogram mass pilot experiment, aiming at delivering the first results on the time scale of six years.
Published: 2016

45. Discovery of tau neutrino appearance in the CNGS neutrino beam with the OPERA experiment

Author: OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bodnarchuk, I., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fornari, F., Fukuda, T., Galati, G., Garfagnini, A., Goldberg, J., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hayakawa, H., Hollnagel, A., Hosseini, B., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Laudisio, F., Lauria, A., Ljubicic, A., Longhin, A., Loverre, P. F., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matsushita, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Miyanishi, M., Mizutani, F., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Olchevsky, A., Omura, T., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Schmidt-Parzefall, W., Shakirianova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Sotnikov, A., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladymyrov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., and Zemskova, S.
Subjects: High Energy Physics - Experiment
Abstract: The OPERA experiment was designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode, i.e. by detecting the $\tau$-leptons produced in charged current $\nu_{\tau}$ interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of $\nu_{\mu} \rightarrow \nu_{\tau}$ appearance, achieved with four candidate events in a sub-sample of the data, was previously reported. In this paper, a fifth $\nu_{\tau}$ candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow assessing the discovery of $\nu_{\mu}\rightarrow \nu_{\tau}$ oscillations in appearance mode with a significance larger than 5 $\sigma$., Comment: 7 pages, 3 figures
Published: 2015
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46. Event-by-event study of CR composition with the SPHERE experiment using the 2013 data

Author: Antonov, R. A., Aulova, T. V., Bonvech, E. A., Chernov, D. V., Dzhatdoev, T. A., Finger, Mich., Finger, Mir., Galkin, V. I., Podgrudkov, D. A., and Roganova, T. M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present an event-by-event study of cosmic ray (CR) composition with the reflected Cherenkov light method. The fraction of CR light component above 5 PeV was reconstructed using the 2013 run data of the SPHERE experiment which observed optical Vavilov-Cherenkov radiation of extensive air showers, reflected from snow surface of Lake Baikal. Additionally, we discuss a possibility to improve the elemental groups separability by means of multidimensional criteria., Comment: 8 pages, 15 figures
Published: 2015
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47. Results and prospects on registration of reflected Cherenkov light of EAS from cosmic particles above 10^{15} eV

Author: Antonov, R. A., Aulova, T. V., Bonvech, E. A., Chernov, D. V., Dzhatdoev, T. A., Finger, Mich., Finger, Mir., Galkin, V. I., Podgrudkov, D. A., and Roganova, T. M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We give an overview of the SPHERE experiment based on detection of reflected Vavilov-Cherenkov radiation (Cherenkov light) from extensive air showers in the energy region E>10^{15} eV. A brief history of the reflected Cherenkov light technique is given; the observations carried out with the SPHERE-2 detector are summarized; the methods of the experimental datasample analysis are described. The first results on the primary cosmic ray all-nuclei energy spectrum and mass composition are presented. Finally, the prospects of the SPHERE experiment and the reflected Cherenkov light technique are given., Comment: 4 pages, 3 figures, Proc. PANIC-2014
Published: 2015

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

Author: OPERA Collaboration, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bodnarchuk, I., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., Sanchez, P. Del Amo, Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R. A., Fukuda, T., Galati, G., Garfagnini, A., Goldberg, J., Gornushkin, Y., Grella, G., Guler, A. M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kim, J. H., Kim, S. H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Ljubicic, A., Longhin, A., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Mikado, S., Monacelli, P., Montesi, M. C., Morishima, K., Muciaccia, M. T., Naganawa, N., Naka, T., Nakamura, M., Nakano, T., Nakatsuka, Y., Niwa, K., Ogawa, S., Omura, T., Ozaki, K., Paoloni, A., Paparella, L., Park, B. D., Park, I. G., Pasqualini, L., Pastore, A., Patrizii, L., Pessard, H., Podgrudkov, D., Polukhina, N., Pozzato, M., Pupilli, F., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakirianova, I., Shchedrina, T., Sheshukov, A., Shibuya, H., Shiraishi, T., Shoziyoev, G., Simone, S., Sioli, M., Sirignano, C., Sirri, G., Spinetti, M., Stanco, L., Starkov, N., Stellacci, S. M., Stipcevic, M., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladymyrov, M., Votano, L., Vuilleumier, J. L., Wilquet, G., Wonsak, B., Yoon, C. S., and Zemskova, S.
Subjects: High Energy Physics - Experiment
Abstract: The OPERA experiment, exposed to the CERN to Gran Sasso $\nu_\mu$ beam, collected data from 2008 to 2012. Four oscillated $\nu_\tau$ Charged Current interaction candidates have been detected in appearance mode, which are consistent with $\nu_\mu \to \nu_\tau$ oscillations at the atmospheric $\Delta m^2$ within the "standard" three-neutrino framework. In this paper, the OPERA $\nu_\tau$ appearance results are used to derive limits on the mixing parameters of a massive sterile neutrino., Comment: 11 pages, 4 figures; reference to Planck result updated in the Introduction. Submitted to JHEP
Published: 2015
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49. TAIGA—An Innovative Hybrid Array for High Energy Gamma Astronomy, Cosmic Ray Physics and Astroparticle Physics

Author: Budnev, N., Astapov, I., Bezyazeekov, P., Bonvech, E., Borodin, A., Brückner, M., Bulan, A., Chernov, D., Chiavassa, A., Dyachok, A., Gafarov, A., Garmash, A., Grebenyuk, V., Gress, O., Gress, T., Grinyuk, A., Grishin, O., Horns, D., Ivanova, Al., Ivanova, A., Kalmykov, N., Kindin, V., Kiryuhin, S., Kokoulin, R., Kompaniets, K., Korosteleva, E., Kotovschikov, I., Kozhin, V., Kravchenko, E., Kryukov, A., Kuzmichev, L., Lagutin, A., Lemeshev, Yu., Lubsandorzhiev, B., Lubsandorzhiev, N., Lukyantsev, D., Mirgazov, R., Mirzoyan, R., Monkhoev, R., Osipova, E., Pakhorukov, A., Pan, A., Panasyuk, M., Pankov, L., Podgrudkov, D., Poleschuk, V., Popova, E., Porelli, A., Postnikov, E., Prosin, V., Ptuskin, V., Petrukhin, A., Pushnin, A., Raikin, R., Rjabov, E., Rubtsov, G., Sagan, Y., Samoliga, V., Sidorenkov, A., Silaev, A., Silaev, Jr., A., Skurikhin, A., Slunecka, M., Sokolov, A., Sveshnikova, L., Suvorkin, Y., Tabolenko, V., Tanaev, A., Tarashansky, B., Ternovoy, M., Tkachev, L., Tluczykont, M., Togoo, R., Ushakov, N., Volchugov, P., Voronin, D., Wischnewski, R., Yashin, I., Zagorodnikov, A., Zhaglova, A., and Zhurov, D.
Published: 2021
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50. First Results from Operating a Prototype Wide-Angle Telescope for the TAIGA Installation

Author: Podgrudkov, D. A., Bonvech, E. A., Vaiman, I. V., Chernov, D. V., Astapov, I. I., Bezyazeekov, P. A., Blank, M., Borodin, A. N., Brückner, M., Budnev, N. M., Bulan, A. V., Vaidyanathan, A., Wischnewski, R., Volchugov, P. A., Voronin, D. M., Gafarov, A. R., Gress, O. A., Gress, T. I., Grishin, O. G., Garmashi, A. Yu., Grebenyuk, V. M., Grinyuk, A. V., Dyachok, A. N., Zhurov, D. P., Zagorodnikov, A. V., Ivanova, A. L., Kalmykov, N. N., Kindin, V. V., Kiryuhin, S. N., Kokoulin, R. L., Kompaniets, K. G., Korosteleva, E. E., Kozhin, V. A., Kravchenko, E. A., Kryukov, A. P., Kuzmichev, L. A., Chiavassa, A., Lavrova, M., Lagutin, A. A., Lemeshev, Yu. E., Lubsandorzhiev, B. K., Lubsandorzhiev, N. B., Mirgazov, R. R., Mirzoyan, R., Monkhoev, R. D., Osipova, E. A., Pakhorukov, A. L., Pan, A., Panasyuk, M. I., Pankov, L. V., Petrukhin, A. A., Poleschuk, V. A., Popesku, M., Popova, E. G., Porelli, A., Postnikov, E. B., Prosin, V. V., Ptuskin, V. S., Pushnin, A. A., Raikin, R. I., Rubtsov, G. I., Ryabov, E. V., Sagan, Ya. I., Samoliga, V. S., Silaev, A. A., Silaev, Jr., A. A., Sidorenkov, A. Yu., Skurikhin, A. V., Slunecka, M., Sokolov, A. V., Sveshnikova, L. G., Suvorkin, Ya. V., Tabolenko, V. A., Tanaev, A. V., Tarashansky, B. A., Ternovoy, M. Yu., Tkachev, L. G., Tluczykont, M., Ushakov, N. A., Horns, D., and Yashin, I. V.
Published: 2021
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