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1. Search for high energy γ-rays from the direction of the candidate electromagnetic counterpart to the binary black hole merger gravitational-wave event S190521g

Author: Egor Podlesnyi and Timur Dzhatdoev
Subjects: Black hole mergers, High energy γ-rays, Fermi-LAT space γ-ray telescope, Physics, QC1-999
Abstract: The gravitational-wave event S190521g — a likely binary black hole merger in the accretion disk of an active galactic nucleus — was accompanied by an optical counterpart. Such dense environments around luminous energy release regions are favorable for high energy γ-ray production. We report on a search for high energy γ-rays from the direction of the candidate electromagnetic counterpart to the S190521g event using publicly-available data of the Fermi-LAT space γ-ray telescope. No significant signal was found. We present upper limits on the spectral energy distribution of the source in the 100 MeV–300 GeV energy range. We discuss the importance of studying S190521g-like transients in the context of cosmic ray acceleration, γ-ray and neutrino production in such sources.
Published: 2020
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2. Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field

Author: Timur Dzhatdoev, Vladimir Galkin, and Egor Podlesnyi
Subjects: astroparticle physics, non-thermal radiation mechanisms, active galaxies, BL Lacertae objects: individual: 1ES 0229+200, Elementary particle physics, QC793-793.5
Abstract: Extreme TeV blazars (ETBs) are active galactic nuclei with jets presumably pointing towards the observer having their intrinsic (compensated for the effect of γ-ray absorption on extragalactic background light photons) spectral energy distributions (SEDs) peaked at an energy in excess of 1 TeV. These sources typically reveal relatively weak and slow variability as well as higher frequency of the low-energy SED peak compared to other classes of blazars. It proved to be exceedingly hard to incorporate all these peculiar properties of ETBs into the framework of conventional γ-ray emission models. ETB physics have recently attracted great attention in the astrophysical community, underlying the importance of the development of self-consistent ETB emission model(s). We propose a new scenario for the formation of X-ray and γ-ray spectra of ETBs assuming that electromagnetic cascades develop in the infrared photon field surrounding the central blazar engine. This scenario does not invoke compact fast-moving sources of radiation (so-called “blobs”), in agreement with the apparent absence of fast and strong variability of ETBs. For the case of the extreme TeV blazar 1ES 0229+200 we propose a specific emission model in the framework of the considered scenario. We demonstrate that this model allows to obtain a good fit to the measured SED of 1ES 0229+200.
Published: 2021
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3. OPERA tau neutrino charged current interactions

Author: A. Iuliano, S. Simone, S. Vasina, J. L. Vuilleumier, K. Ozaki, T. Fukuda, Chiara Sirignano, M. T. Muciaccia, L. Stanco, A. Sotnikov, Gaston Wilquet, M. Nakamura, G. Sirri, Artem Chukanov, D. A. Podgrudkov, J. Goldberg, Osamu Sato, Adele Lauria, Nicola D'Ambrosio, N. G. Polukhina, N. Di Marco, Antonio Ereditato, J. Ebert, Tatsuhiro Naka, R. Brugnera, A. Garfagnini, B. Klicek, Giuliana Galati, M. Spinetti, T. M. Roganova, N. Mauri, M. Chernyavskiy, G. Grella, A. M. Anokhina, Alessandro Paoloni, Masahiro Komatsu, C. S. Yoon, E. Shibayama, Toshiyuki Nakano, F. Mizutani, F. Pupilli, G. De Lellis, M. Tenti, Maria Cristina Montesi, Tomoko Ariga, M. De Serio, P. F. Loverre, S. Tufanli, D. Duchesneau, Akitaka Ariga, I. Tsanaktsidis, Kunihiro Morishima, C. Kamiscioglu, N. Agafonova, Shigeki Aoki, Seok Kim, S. Gorbunov, M. Pozzato, P. Monacelli, V. A. Matveev, Timur Dzhatdoev, Cristiano Bozza, Y. A. Gornushkin, N. M. Okateva, Nobuko Kitagawa, Krešimir Jakovčić, A. Lavasa, A. Longhin, Utku Kose, V. Gentile, L. Pasqualini, T. Shiraishi, A. Hollnagel, L. Patrizii, Satoru Takahashi, G. Mandrioli, A. Schembri, A. Buonaura, Gianfranca De Rosa, S. Dusini, T. Matsuo, C. Gustavino, T. Hayakawa, N. I. Starkov, Salvatore Buontempo, Anselmo Meregaglia, T. V. Shchedrina, Pierre Vilain, Andrey Ustyuzhanin, S. Ogawa, A. M. Guler, A. Alexandrov, S. Dmitrievsky, B. D. Park, Naotaka Naganawa, M. Roda, P. Strolin, Marcos Dracos, Motoaki Miyanishi, O. G. Ryazhskaya, R. A. Fini, E. Medinaceli, Hiroki Rokujo, Simona Maria Stellacci, A. S. Malgin, I. Shakirianova, Alessandro Pastore, F. Fornari, Mario Stipčević, D. Di Ferdinando, Katsumi Ishiguro, S. Mikado, I. Kreslo, M. Vidal García, A. Di Crescenzo, H. Pessard, T. Šimko, P. Del Amo Sanchez, V. Tioukov, K. Kodama, Caren Hagner, T. Hara, L. Consiglio, F. Terranova, A. Bertolin, Kimio Niwa, H. Shibuya, E. Voevodina, M. Kamiscioglu, Cécile Jollet, L. Votano, F. Laudisio, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), OPERA, 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, del Amo Sanchez, P, 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, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gorbunov, S, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Ishiguro, K, Iuliano, A, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Laudisio, F, Lauria, A, Lavasa, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Ogawa, S, Okateva, N, Ozaki, K, Paoloni, A, Park, B, 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, Shakirianova, I, Schembri, A, Shchedrina, T, Shibayama, E, Shibuya, H, Shiraishi, T, Simko, T, Simone, S, Sirignano, C, Sirri, G, Sotnikov, A, Spinetti, M, Stanco, L, Starkov, N, Stellacci, S, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tsanaktsidis, I, Tufanli, S, Ustyuzhanin, A, Vasina, S, Vidal Garcia, M, Vilain, P, Voevodina, E, Votano, L, Vuilleumier, J, Wilquet, G, Yoon, C, 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., del Amo Sanchez, P., 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., 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., Lavasa, 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., 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., Shakirianova, I., Schembri, A., Shchedrina, T., Shibayama, E., Shibuya, H., Shiraishi, T., Simko, 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., Tsanaktsidis, I., Tufanli, S., Ustyuzhanin, A., Vasina, S., Vidal Garcia, M., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., Yoon, C. S., 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., del Amo Sanchez P., 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., 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., Lavasa 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., 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., Shakirianova I., Schembri A., Shchedrina T., Shibayama E., Shibuya H., Shiraishi T., Simko 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., Tsanaktsidis I., Tufanli S., Ustyuzhanin A., Vasina S., Vidal Garcia M., Vilain P., Voevodina E., Votano L., Vuilleumier J.L., Wilquet G., and Yoon C.S.
Subjects: Statistics and Probability, Data Descriptor, Particle physics, data analysis method, CERN Lab, lead: target, Opera, Science, Library and Information Sciences, 7. Clean energy, 01 natural sciences, OPERA, neutrino oscillation, dataset, Education, charged current, CNGS, Tau neutrino, 0103 physical sciences, tau neutrino, neutrino detector, OPERA, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Neutrino oscillation, neutrino, tau appearance, Charged current, nuclear-emulsion, energy, ratio, Physics, Large Hadron Collider, 010308 nuclear & particles physics, nucleus, neutrino nucleus: interaction, neutrino/mu: secondary beam, Computer Science Applications, Gran Sasso, neutrino/tau: particle identification, Phenomenology, neutrino: oscillation, Statistics, Probability and Uncertainty, Experimental particle physics, statistical, Beam (structure), Particle Physics - Experiment, Information Systems, experimental results
Abstract: The OPERA experiment was designed to discover the vτ appearance in a vμ beam, due to neutrino oscillations. The detector, located in the underground Gran Sasso Laboratory, consisted of a nuclear photographic emulsion/lead target with a mass of about 1.25 kt, complemented by electronic detectors. It was exposed from 2008 to 2012 to the CNGS beam: an almost pure vμ beam with a baseline of 730 km, collecting a total of 1.8·1020 protons on target. The OPERA Collaboration eventually assessed the discovery of vμ→vτ oscillations with a statistical significance of 6.1 σ by observing ten vτ CC interaction candidates. These events have been published on the Open Data Portal at CERN. This paper provides a detailed description of the vτ data sample to make it usable by the whole community., Measurement(s)tau neutrinoTechnology Type(s)detectorSample Characteristic - Environmentneutrino beamSample Characteristic - LocationLaboratori Nazionali del Gran Sasso Machine-accessible metadata file describing the reported data: 10.6084/m9.figshare.14979858
Published: 2021

4. Observable spectral and angular distributions of γ-rays from extragalactic ultrahigh energy cosmic ray accelerators: the case of extreme TeV blazars

Author: Timur Dzhatdoev and E. V. Khalikov
Subjects: Astroparticle physics, Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Astronomy and Astrophysics, Observable, Cosmic ray, Astrophysics, 01 natural sciences, Extragalactic cosmic ray, Spectral line, Space and Planetary Science, 0103 physical sciences, Intergalactic travel, Astrophysics - High Energy Astrophysical Phenomena, Blazar, 010303 astronomy & astrophysics, Galaxy cluster
Abstract: Ultrahigh energy protons and nuclei from extragalactic cosmic ray sources initiate intergalactic electromagnetic cascades, resulting in observable fluxes of $\gamma$-rays in the GeV-TeV energy domain. The total spectrum of such cascade $\gamma$-rays of hadronic nature is significantly harder than the one usually expected from blazars. The spectra of some sources known as "extreme TeV blazars" could be well-described by this "intergalactic hadronic cascade model" (IHCM). We calculate the shape of the observable point-like spectrum, as well as the observable angular distibution of $\gamma$-rays, for the first time taking into account the effect of primary proton deflection in filaments and galaxy clusters of the extragalactic magnetic field assuming the model of Dolag et al. (2005). We present estimates of the width of the observable $\gamma$-ray angular distribution derived from simple geometrical considerations. We also employ a hybrid code to compute the observable spectral and angular distributions of $\gamma$-rays. The observable point-like spectrum at multi-TeV energies is much softer than the one averaged over all values of the observable angle. The presence of a high-energy cutoff in the observable spectra of extreme TeV blazars in the framework of the IHCM could significantly facilitate future searches of new physics processes that enhance the apparent $\gamma$-ray transparency of the Universe (for instance, $\gamma \rightarrow ALP$ oscillations). The width of the observable angular distribution is greater than or comparable to the extent of the point spread function of next-generation $\gamma$-ray telescopes., Comment: 16 pages, 17 figures, accepted for publication in MNRAS. This is the author's version and not the final typeset
Published: 2021

5. The primary proton spectrum of the hadronic PeVatron candidate HAWC J1825-134

Author: Egor Podlesnyi, Igor Vaiman, and Timur Dzhatdoev
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: The $\gamma$-ray spectrum of the source HAWC J1825-134 measured with the High Altitude Water Cherenkov (HAWC) observatory extends beyond 200 TeV without any evidence for a steepening or cutoff. There are some indications that the $\gamma$-rays detected with HAWC were produced by cosmic ray protons or nuclei colliding with the ambient gas. Assuming primary protons, we inquire which shape of the primary proton spectrum is compatible with the HAWC measurements. We find that the primary proton spectrum with the power-law shape of $\gamma_{p}$=2.2 and the cutoff energy $E_{c-p} > 500$ TeV describes the data well. However, much harder spectra with $\gamma_{p}$ down to 1.3 and $E_{c-p}$ as low as 200 TeV also do not contradict the HAWC measurements. The former option might be realized if the accelerator is inside or very near to the $\gamma$-ray production zone. The latter option is viable for the case of a cosmic ray source which effectively confines low-energy ($E_{p} < 10$ TeV) accelerated protons. Using publicly-available data of the Fermi-LAT space $\gamma$-ray telescope, we derive upper limits on the intensity of the HAWC J1825-134 source in the 1 GeV -- 1 TeV energy range. We show that the account of these upper limits drastically changes the interpretation: only hard ($\gamma_{p} < 1.7$) spectra describe the combined HAWC and Fermi-LAT datasets well., Comment: 9 pages, 5 figures. Moderate changes w.r.t. v.2
Published: 2021

6. Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field

Author: Vladimir Galkin, Egor Podlesnyi, and Timur Dzhatdoev
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, astroparticle physics, non-thermal radiation mechanisms, active galaxies, BL Lacertae objects: individual: 1ES 0229+200, General Physics and Astronomy, Elementary particle physics, FOS: Physical sciences, QC793-793.5, Astrophysics::Cosmology and Extragalactic Astrophysics, Computer Science::Programming Languages, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Extreme TeV blazars (ETBs) are active galactic nuclei with jets presumably pointing towards the observer having their intrinsic spectral energy distributions (SEDs) peaked at an energy in excess of 1 TeV. These sources typically reveal relatively weak and slow variability as well as an extremely high frequency of the low-energy SED peak compared to other classes of blazars. It proved to be exceedingly hard to incorporate all these peculiar properties of ETBs into the framework of a reasonable $\gamma$-ray emission model. ETB physics have recently attracted great attention in the astrophysical community, underlying the importance of the development of self-consistent ETB emission model(s). We propose a new scenario for the formation of X-ray and $\gamma$-ray spectra of ETBs assuming that electromagnetic cascades develop in the infrared photon field surrounding the central blazar engine. This scenario does not invoke compact fast-moving sources of radiation (so-called "blobs"), in agreement with the apparent absence of fast and strong variability of ETBs. For the case of the extreme TeV blazar 1ES 0229+200 we propose a specific emission model in the framework of the considered scenario. We demonstrate that this model allows to obtain a good fit to the measured SED of 1ES 0229+200., Comment: 15 pages, 4 figures, 2 tables. Accepted for publication in Universe on 2nd of December 2021; published in Universe on 14th of December 2021. This is author's version and not the final typeset
Published: 2021
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7. First observation of a tau neutrino charged current interaction with charm production in the OPERA experiment

Author: G. De Lellis, C. Kamiscioglu, L. Votano, R. Brugnera, F. Laudisio, S. Gorbunov, F. Pupilli, A. Longhin, A. Buonaura, A. Garfagnini, Timur Dzhatdoev, Nicola D'Ambrosio, Tatsuhiro Naka, P. F. Loverre, Motoaki Miyanishi, P. Strolin, Alessandra Pastore, Marcos Dracos, Satoru Takahashi, E. Shibayama, Toshiyuki Nakano, M. Nakamura, M. Tenti, A. Schembri, Krešimir Jakovčić, L. Paparella, R. A. Fini, C. Gustavino, H. Shibuya, Gianfranca De Rosa, N. I. Starkov, D. Duchesneau, E. Voevodina, N. G. Polukhina, T. Hara, I. Kreslo, Seok Kim, Tomoko Ariga, M. De Serio, J. Ebert, M. Kamiscioglu, M. Pozzato, Kunihiro Morishima, T. Matsuo, N. Di Marco, T. Hayakawa, T. Fukuda, Cristiano Bozza, V. A. Matveev, N. M. Okateva, Naotaka Naganawa, A. Bertolin, Anselmo Meregaglia, V. Gentile, H. Pessard, Antonio Ereditato, M. Malenica, J. Goldberg, Osamu Sato, Adele Lauria, M. Roda, Cécile Jollet, Salvatore Buontempo, M. Spinetti, M. T. Muciaccia, E. Medinaceli, A. S. Malgin, L. Pasqualini, L. Patrizii, G. Mandrioli, G. Sirri, Artem Chukanov, D. A. Podgrudkov, S. Dmitrievski, T. V. Shchedrina, P. del AmoÂ Sanchez, A. Iuliano, S. Simone, Chiara Sirignano, S. Dusini, Alessandro Paoloni, S. Vasina, Mario Stipčević, Katsumi Ishiguro, M. Chernyavskiy, F. Mizutani, I. Shakirianova, A. Di Crescenzo, N. Agafonova, Utku Kose, A. M. Guler, G. Grella, F. Fornari, B. Klicek, Giuliana Galati, J. L. Vuilleumier, K. Ozaki, V. Tioukov, T. Shiraishi, A. Sotnikov, Nobuko Kitagawa, Masahiro Komatsu, D. Di Ferdinando, O. G. Ryazhskaya, C. S. Yoon, Y. A. Gornushkin, Gaston Wilquet, S. Mikado, Maria Cristina Montesi, Hiroki Rokujo, Simona Maria Stellacci, Akitaka Ariga, Shigeki Aoki, L. Stanco, Pierre Vilain, A. Hollnagel, P. Monacelli, A. B. Aleksandrov, T. M. Roganova, N. Mauri, B. D. Park, A. M. Anokhina, Kimio Niwa, S. Ogawa, K. Kodama, Caren Hagner, L. Consiglio, F. Terranova, 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., del AmoSanchez P., 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., 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., 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., 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., Shakirianova 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., Yoon C.S., 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, del AmoSanchez, P, 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, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gorbunov, S, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Ishiguro, K, Iuliano, A, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Laudisio, F, Lauria, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Okateva, N, Ogawa, S, Ozaki, K, Paoloni, A, Paparella, L, Park, B, 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, Shibuya, H, Shibayama, E, Shiraishi, T, Simone, S, Sirignano, C, Sirri, G, Sotnikov, A, Spinetti, M, Stanco, L, Starkov, N, Stellacci, S, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Vasina, S, Vilain, P, Voevodina, E, Votano, L, Vuilleumier, J, Wilquet, G, and Yoon, C
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Neutral current, 010308 nuclear & particles physics, tau neutrino interaction, charm production, OPERA, 01 natural sciences, neutrino, Pair production, Tau neutrino, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), Charm (quantum number), Neutrino, 010306 general physics, Engineering (miscellaneous), Event (particle physics), Charged current
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 $$c\overline{c}$$cc¯ 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 $$\nu _{\tau }$$ντ 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.
Published: 2020

8. Can we constrain the extragalactic magnetic field from very high energy observations of GRB 190114C?

Author: Egor Podlesnyi, I.A. Vaiman, and Timur Dzhatdoev
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Photon, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Observable, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Magnetic field, law.invention, Telescope, Extragalactic background light, law, 0103 physical sciences, Intergalactic travel, 010306 general physics, Gamma-ray burst, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation
Abstract: Primary very high energy $\gamma$-rays from $\gamma$-ray bursts (GRBs) are partially absorbed on extragalactic background light (EBL) photons with subsequent formation of intergalactic electromagnetic cascades. Characteristics of the observable cascade $\gamma$-ray signal are sensitive to the strength and structure of the extragalactic magnetic field (EGMF). GRB 190114C was recently detected with the MAGIC imaging atmospheric Cherenkov telescopes, for the first time allowing to estimate the observable cascade intensity. We inquire whether any constraints on the EGMF strength and structure could be obtained from publicly-available $\gamma$-ray data on GRB 190114C. We present detailed calculations of the observable cascade signal for various EGMF configurations. We show that the sensitivity of the Fermi-LAT space $\gamma$-ray telescope is not sufficient to obtain such constraints on the EGMF parameters. However, next-generation space $\gamma$-ray observatories such as MAST would be able to detect pair echoes from GRBs similar to GRB 190114C for the EGMF strength below 10^{-17}--10^{-18} G., Comment: 8 pages, 4 figures. Accepted for publication in Phys. Rev. D
Published: 2020

9. Cascades from primary gamma rays and nuclei as a source of background in searches for oscillations between photons and axion-like particles

Author: Timur Dzhatdoev, S. A. Baklagin, A. P. Kircheva, A. A. Lukshin, and E. V. Khalikov
Subjects: Physics, Nuclear and High Energy Physics, Photon, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics, 01 natural sciences, Spectral line, Physics::Geophysics, Secondary component, Primary (astronomy), 0103 physical sciences, 010303 astronomy & astrophysics, Axion
Abstract: Methods of searching for oscillations of photons to axion-like particles (γ → ALP) in spectra of extragalactic sources are considered. It is shown that the secondary component from the cascades initiated by primary gamma rays or nuclei can produce an appreciable background in searches for ALPs in the optically thick region of the spectrum. Experiments with a high energy threshold (~1 TeV and higher) are insufficient for searching for γ → ALP oscillations; low-energy instruments (E < 100 GeV) like CTA should also be used.
Published: 2018

10. Spatiotemporal Structure of a Reflected Cherenkov Light Signal, as Seen by the Sphere-2 Telescope

Author: Timur Dzhatdoev, D. A. Podgrudkov, T. M. Roganova, V. I. Galkin, E. A. Bonvech, and Dmitry Chernov
Subjects: 010302 applied physics, Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Astronomy, Cosmic ray, Light signal, Radiation, Mass composition, 01 natural sciences, law.invention, Telescope, law, 0103 physical sciences, Cherenkov radiation
Abstract: SPHERE-2 is a Cherenkov telescope suspended under a tethered balloon and observing the optical Vavilov–Cherenkov radiation of extensive air showers (EAS) reflected from the snowy surface of Lake Baikal. Extended modeling of the SPHERE-2 detector’s response is done with a specially developed code. Resulting model events resemble EASes observed during observation runs at Lake Baikal. This work should facilitate event-by-event studies of cosmic ray mass composition in the 10–100 PeV range of energies.
Published: 2019

11. Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

Author: Mitsuhiro Nakamura, R. Brugnera, Toshiyuki Nakano, Cristiano Bozza, M. Tenti, N. M. Okateva, Kimio Niwa, F. Pupilli, V. Gentile, Tomoko Ariga, M. De Serio, Antonio Ereditato, Kunihiro Morishima, G. De Lellis, N. Di Marco, I. Shakiryanova, Timur Dzhatdoev, A. Sotnikov, Masahiro Komatsu, Krešimir Jakovčić, Nicola D'Ambrosio, Caren Hagner, T. Naka, A. Hollnagel, L. Paparella, M. Spinetti, D. A. Podgrudkov, Gaston Wilquet, A. Di Crescenzo, A. Garfagnini, H. Shibuya, L. Consiglio, L. Pasqualini, F. Terranova, G. Sirri, E. Shibayama, P. Monacelli, B. Klicek, Akitaka Ariga, S. Simone, C. Gustavino, Artem Chukanov, T. Fukuda, N. I. Starkov, D. Duchesneau, Utku Kose, E. Voevodina, M. Chernyavskiy, T. M. Roganova, Alessandro Paoloni, F. Mizutani, L. Patrizii, Natalia Polukhina, C. Kamiscioglu, N. Agafonova, J. L. Vuilleumier, J. Goldberg, Osamu Sato, N. Mauri, Shigeki Aoki, Adele Lauria, S. Dmitrievsky, B. D. Park, G. Mandrioli, T. Shiraishi, A. Iuliano, O. G. Ryazhskaya, H. Pessard, Luca Stanco, V. Matveev, G. Grella, A. Longhin, Valeri Tioukov, Pierre Vilain, K. Kodama, E. Medinaceli, S. Dusini, G. Galati, J. Ebert, P. del Amo Sanchez, Hiroki Rokujo, A. Schembri, Y. A. Gornushkin, C. S. Yoon, Salvatore Buontempo, Simona Maria Stellacci, L. Votano, S. Vasina, Kazumi Ozaki, Maria Cristina Montesi, Chiara Sirignano, P. F. Loverre, A. S. Malgin, Satoru Takahashi, Gianfranca De Rosa, Naotaka Naganawa, T. Hayakawa, Anselmo Meregaglia, F. Laudisio, Seok Kim, M. Roda, M. Pozzato, S. Gorbunov, P. Strolin, M. Kamiscioglu, Marcos Dracos, A. M. Anokhina, T. V. Shchedrina, S. Ogawa, S. Tufanli, Cécile Jollet, A. Alexandrov, M. T. Muciaccia, A. M. Guler, I. Kreslo, Alessandro Pastore, Mario Stipčević, Katsumi Ishiguro, Motoaki Miyanishi, R. A. Fini, Nobuko Kitagawa, T. Matsuo, A. Bertolin, T. Hara, D. Di Ferdinando, S. Mikado, 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., del Amo Sanchez, P., 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., 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., 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., Tufanli, S., Vasina, S., Vilain, P., Voevodina, E., Votano, L., Vuilleumier, J. L., Wilquet, G., Yoon, C. S., Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), OPERA, 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, Del Amo Sanchez, P, 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, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gorbunov, S, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Ishiguro, K, Iuliano, A, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, S, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Ogawa, S, Okateva, N, Ozaki, K, Paoloni, A, Paparella, L, Park, B, 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, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Vasina, S, Vilain, P, Voevodina, E, Votano, L, Vuilleumier, J, Wilquet, G, Yoon, C, 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., Del Amo Sanchez P., 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., Yoon C.S., Laboratoire d'Annecy de Physique des Particules (LAPP), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Sterile neutrino, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), neutrino oscillations, OPERA, CNGS, neutrino, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], S067P23, Muon neutrino, Detectors and Experimental Techniques, physics.ins-det, Charged current, neutrino: interaction, Physics, Instrumentation and Detectors (physics.ins-det), neutrino: sterile, antineutrino, BooNE, Neutrino, numerical calculations: Monte Carlo, Particle Physics - Experiment, oscillation: model, Particle physics, neutral current, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, neutrino: beam, MiniBooNE, weak interaction, S067DM1, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], neutrino oscillations, sterile neutrinos, tau leptons, neutrino detectors, 010306 general physics, Neutrino oscillation, Neutral current, 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, charged current: coupling, LSND, S067P13, three-flavor neutrino oscillation model, sterile neutrino, High Energy Physics::Experiment, neutrino: oscillation, neutrino: mixing, Electron neutrino, neutrino: mass: hierarchy
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

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

Author: G. De Lellis, S. Dmitrievsky, Kunihiro Morishima, B. D. Park, Chiara Sirignano, Caren Hagner, G. Galati, M. Miyanishi, S. Buontempo, F. Terranova, Nicola D'Ambrosio, N. Di Marco, A. M. Anokhina, Tatsuhiro Naka, Akitaka Ariga, A. S. Malgin, C. Gustavino, M. T. Muciaccia, Andrey Alexandrov, K. Niwa, Nobuko Kitagawa, Mitsuhiro Nakamura, R. Brugnera, P. Monacelli, N. Agafonova, M. Dracos, F. Laudisio, T. Hayakawa, Maria Cristina Montesi, Shigeki Aoki, Masahiro Komatsu, H. Rokujo, F. Fornari, M. Kamiscioglu, T. Shchedrina, T. Hara, D. A. Podgrudkov, S. Simone, Valeri Tioukov, J. L. Vuilleumier, Naotaka Naganawa, A. Buonaura, Pierre Vilain, G. Mandrioli, D. Di Ferdinando, Luca Stanco, A. Garfagnini, J. Goldberg, M. Chernyavskiy, B. Klicek, S. Mikado, M. Roda, Cécile Jollet, F. Pupilli, P. Strolin, Alessandro Paoloni, G. Grella, M. Tenti, J. Ebert, F. Mizutani, A. Sotnikov, Koichi Kodama, A. Hollnagel, T. M. Roganova, N. Mauri, C. Kamiscioglu, N. Okateva, H. Pessard, I. Shakiryanova, N. I. Starkov, Mario Stipčević, Lucia Votano, H. Shibuya, C. S. Yoon, A. Chukanov, Kazumi Ozaki, Natalia Polukhina, G. Rosa, M. Pozzato, L. Patrizii, Gaston Wilquet, D. Duchesneau, Seok Kim, Katsumi Ishiguro, M. De Serio, E. Voevodina, Tomoko Ariga, Timur Dzhatdoev, S. Vasina, Osamu Sato, Adele Lauria, A. Di Crescenzo, Krešimir Jakovčić, V. A. Matveev, Yuri Gornushkin, M. Spinetti, P. F. Loverre, L. Paparella, A. Iuliano, Simona Maria Stellacci, E. Shibayama, I. Kreslo, A. M. Guler, Utku Kose, P. del Amo Sanchez, O. Ryazhskaya, A. Pastore, T. Shiraishi, Satoru Takahashi, R. A. Fini, T. Fukuda, G. Sirri, Ante Ljubičić, A. Longhin, Anselmo Meregaglia, S. Ogawa, A. Schembri, T. Matsuo, Cristiano Bozza, V. Gentile, A. Ereditato, A. Bertolin, L. Pasqualini, E. Medinaceli, S. Dusini, L. Consiglio, S. Gorbunov, Toshiyuki Nakano, 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., Lellis G.D., Serio M.D., Sanchez P.D.A., Crescenzo A.D., Ferdinando D.D., Marco N.D., 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., 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., 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., Vasina S., Vilain P., Voevodina E., Votano L., Vuilleumier J.L., Wilquet G., Yoon C.S., Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), OPERA, Laboratoire d'Annecy de Physique des Particules (LAPP), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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., Lellis, G. De, Serio, M. De, Sanchez, P. del Amo, Crescenzo, A. Di, Ferdinando, D. Di, Marco, N. Di, 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., Yoon, C. S., 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, Lellis, G, Serio, M, Sanchez, P, Crescenzo, A, Ferdinando, D, Marco, N, Dmitrievsky, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Ereditato, A, Fini, R, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gorbunov, S, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Ishiguro, K, Iuliano, A, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Laudisio, F, Lauria, A, Ljubicic, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Ogawa, S, Okateva, N, Ozaki, K, Paoloni, A, Paparella, L, Park, B, 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, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Vasina, S, Vilain, P, Voevodina, E, Votano, L, Vuilleumier, J, Wilquet, G, and Yoon, C
Subjects: Physics - Instrumentation and Detectors, cosmic rays detectors, neutrino detectors, neutrino experiments, Physics::Instrumentation and Detectors, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Physics::Popular Physics, Observatory, Tau neutrino, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear emulsion, Muon neutrino, Detectors and Experimental Techniques, Nuclear Experiment, physics.ins-det, Physics, Detector, OPERA, Astrophysics::Instrumentation and Methods for Astrophysics, resistive plate chamber, Instrumentation and Detectors (physics.ins-det), observatory, modulation, nuclear emulsion, neutrino detector, neutrino/tau: particle identification, Particle Physics - Experiment, Particle physics, atmosphere: temperature, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, Nuclear physics, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], cosmic rays detector, muon: flux, scintillation counter, Muon, hep-ex, 010308 nuclear & particles physics, Astronomy and Astrophysics, neutrino/mu: secondary beam, Gran Sasso, correlation, muon: cosmic radiation, High Energy Physics::Experiment, neutrino: oscillation, Lepton, experimental results
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 its correlation with the seasonal cycle of atmospheric temperature is reported. 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: 2019

13. Signatures of blazar spectra in the electromagnetic and hadronic intergalactic cascade models

Author: Timur Dzhatdoev, A. P. Kircheva, E. V. Khalikov, and A. A. Lyukshin
Subjects: Physics, Photon, Spectral signature, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Cherenkov Telescope Array, 01 natural sciences, Spectral line, Cascade, 0103 physical sciences, Intergalactic travel, 010306 general physics, Blazar, 010303 astronomy & astrophysics
Abstract: There are indications that a secondary component of cascade photons is present in the spectra of some bright blazars. The main spectral signatures are considered using the electromagnetic model. The simplest version of the hadronic cascade model can be distinguished from the electromagnetic cascade at a significance level of ~3 σ for a typical observation of a blazar at the Cherenkov Telescope Array (CTA).
Published: 2017

14. Intergalactic $\gamma$-ray propagation: basic ideas, processes, and constraints

Author: Egor Podlesnyi, Anastasia Telegina, Timur Dzhatdoev, and E. V. Khalikov
Subjects: Physics, History, Magnetization, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray detectors, Intergalactic travel, Astrophysics, Blazar, Astrophysics - High Energy Astrophysical Phenomena, Computer Science Applications, Education
Abstract: We review extragalactic $\gamma$-ray propagation models with emphasis on the electromagnetic (EM) cascade process in the magnetized expanding Universe. We consider cascades initiated by primary protons of ultra-high energy accelerated by blazars and show that the observable spectrum is similar to the universal spectrum of a purely EM cascade. We also present a detailed calculation of the observable angular distribution for the case of EM cascades developing from relatively nearby (, Comment: 6 pages, 4 figures. Several typos corrected in v2
Published: 2018

15. Erratum: Final Results of the OPERA Experiment on ντ Appearance in the CNGS Neutrino Beam [Phys. Rev. Lett. 120 , 211801 (2018)]

Author: A. Hollnagel, C. S. Yoon, Alessandro Pastore, Akitaka Ariga, Mario Stipčević, Maria Cristina Montesi, Katsumi Ishiguro, N. Agafonova, D. A. Podgrudkov, J. Ebert, M. Chernyavskiy, P. F. Loverre, C. Pistillo, G. Grella, M. Pozzato, Satoru Takahashi, C. Jollet, Shigeki Aoki, A. Meregaglia, R. Brugnera, Gianfranca De Rosa, N. Kitagawa, Andrey Ustyuzhanin, Björn Wonsak, V. Matveev, M. Roda, C. Gustavino, P. Monacelli, N. I. Starkov, I. Kreslo, A. Alexandrov, J. L. Vuilleumier, A. Sadovsky, C. Kamiscioglu, Pierre Vilain, Chiara Sirignano, T. Hayakawa, Cristiano Bozza, N. M. Okateva, H. Pessard, M. Spinetti, Naotaka Naganawa, V. Gentile, L. Votano, A. Olchevsky, F. Fornari, Caren Hagner, P. del Amo Sanchez, Nicola D'Ambrosio, A. Iuliano, J. Goldberg, Osamu Sato, S. Vasina, S. Simone, Y. A. Gornushkin, Adele Lauria, Hiroki Rokujo, Salvatore Buontempo, G. Sirri, Tatsuhiro Naka, T. Hara, L. Consiglio, T. M. Roganova, N. Mauri, L. Stanco, F. Terranova, Artem Chukanov, P. Strolin, Shinhong Kim, F. Laudisio, F. Pupilli, A. Buonaura, M. Kamiscioglu, Marcos Dracos, A. Garfagnini, A. S. Malgin, T. V. Shchedrina, Kimio Niwa, S. Dmitrievsky, B. D. Park, V. Tioukov, D. Di Ferdinando, S. Mikado, A. M. Anokhina, E. Shibayama, H. Shibuya, K. Ozaki, E. Voevodina, K. Kodama, S. M. Stellacci, M. Nakamura, A. Bertolin, S. Ogawa, D. Duchesneau, N. G. Polukhina, A. Longhin, T. Fukuda, A. Schembri, T. Matsuo, O. G. Ryazhskaya, N. Di Marco, Masahiro Komatsu, Ante Ljubičić, Motoaki Miyanishi, Alessandro Paoloni, F. Mizutani, M. Tenti, R. A. Fini, Tomoko Ariga, M. De Serio, E. Medinaceli, Utku Kose, T. Shiraishi, S. Gorbunov, A. Sotnikov, Gaston Wilquet, M. Malenica, L. Pasqualini, J. Favier, Serhan Tufanli, L. Patrizii, G. Mandrioli, S. Dusini, Toshiyuki Nakano, G. De Lellis, Kunihiro Morishima, A. M. Guler, B. Klicek, Giuliana Galati, M. T. Muciaccia, I. Shakiryanova, Timur Dzhatdoev, Krešimir Jakovčić, L. Paparella, Antonio Ereditato, and A. Di Crescenzo
Subjects: Nuclear physics, Physics, 010308 nuclear & particles physics, Opera, 0103 physical sciences, General Physics and Astronomy, 010306 general physics, 01 natural sciences, Beam (structure)
Published: 2018

16. Intergalactic electromagnetic cascades in the magnetized Universe as a tool of astroparticle physics

Author: Egor Podlesnyi, Timur Dzhatdoev, A. P. Kircheva, E. V. Khalikov, and Anastasia Telegina
Subjects: Astroparticle physics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Mean free path, Computer Science::Information Retrieval, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, FOS: Physical sciences, Electron, Astrophysics, 01 natural sciences, Universe, Coherence length, Magnetic field, Cascade, 0103 physical sciences, Intergalactic travel, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, media_common
Abstract: We review the physics of intergalactic electromagnetic cascades in the presence of the extragalactic magnetic field (EGMF). Various regimes of intergalactic electromagnetic cascades are considered depending on the number of cascade generations, the value of the cascade electron deflection angle, and the relations between the EGMF coherence length, typical cascade $\gamma$-ray mean free path, and electron energy loss length. We also review contemporary constraints on the EGMF parameters and explore the sensitivity of various $\gamma$-ray instruments to the EGMF parameters., Comment: 8 pages, 3 figures
Published: 2018

17. Final results of the search for νμ → νe oscillations with the OPERA detector in the CNGS beam

Author: A. Buonaura, A. Garfagnini, Caren Hagner, T. Hara, F. Meisel, L. Consiglio, M. Malenica, L. Pasqualini, L. Patrizii, Hiroki Rokujo, L. Votano, D. Duchesneau, F. Terranova, B. Hosseini, G. Mandrioli, S. Dusini, Simona Maria Stellacci, M. Spinetti, M. T. Muciaccia, J. L. Vuilleumier, A. M. Guler, B. Klicek, Giuliana Galati, F. Laudisio, Ante Ljubičić, Alessandro Pastore, Akitaka Ariga, Antonio Ereditato, K. Ozaki, Valeri Tioukov, Pierre Vilain, N. G. Polukhina, S. Dmitrievsky, T. M. Roganova, B. D. Park, M. Kamiscioglu, T. Shiraishi, Nicola D'Ambrosio, N. Mauri, N. Agafonova, M. Dracos, Motoaki Miyanishi, Shigeki Aoki, M. Tenti, N. Di Marco, Alessandro Paoloni, C. Jollet, Mario Stipčević, F. Mizutani, A. S. Malgin, Tatsuhiro Naka, I. Shakiryanova, Koichi Kodama, R. A. Fini, A. Hollnagel, S. Simone, Katsumi Ishiguro, E. Shibayama, Timur Dzhatdoev, Tomoko Ariga, M. De Serio, Mitsuhiro Nakamura, A. M. Anokhina, Krešimir Jakovčić, T. V. Shchedrina, R. Brugnera, F. Fornari, L. Paparella, A. Longhin, Satoru Takahashi, D. Di Ferdinando, P. F. Loverre, C. S. Yoon, K. Niwa, S. Mikado, S. Vasina, E. Medinaceli, A. Schembri, G. Sirri, S. Gorbunov, C. Kamiscioglu, Artem Chukanov, J. Goldberg, U. Kose, F. Pupilli, T. Hayakawa, T. Matsuo, Toshiyuki Nakano, I. Kreslo, Anselmo Meregaglia, J. Favier, G. De Lellis, L. Stanco, S. Buontempo, J. Ebert, Maria Cristina Montesi, A. Di Crescenzo, Y. A. Gornushkin, P. Strolin, H. Pessard, P. Monacelli, Antonio Iuliano, A. B. Aleksandrov, D. A. Podgrudkov, Kunihiro Morishima, Chiara Sirignano, H. Shibuya, Nobuko Kitagawa, T. Fukuda, E. Voevodina, M. Chernyavskiy, Masahiro Komatsu, A. Sotnikov, G. Grella, P. Del Amo Sanchez, G. Rosa, Gaston Wilquet, Seok Kim, M. Pozzato, V. A. Matveev, Naotaka Naganawa, M. Roda, O. G. Ryazhskaya, S. Ogawa, Osamu Sato, Adele Lauria, C. Gustavino, N. I. Starkov, Cristiano Bozza, N. M. Okateva, V. Gentile, A. Bertolin, 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, del Amo Sanchez, P, 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, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gornushkin, Y, Gorbunov, S, Grella, G, Guler, A, 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, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Okateva, N, Ogawa, S, Ozaki, K, Paoloni, A, Paparella, L, Park, B, 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, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Vasina, S, Vilain, P, Voevodina, E, Votano, L, Vuilleumier, J, Wilquet, G, Yoon, C, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), OPERA, Laboratoire d'Annecy de Physique des Particules (LAPP), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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., del Amo Sanchez, P., 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., Yoon, C. S., Laboratoire d'Annecy de Physique des Particules ( LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Pluridisciplinaire Hubert Curien ( IPHC ), Université de Strasbourg ( UNISTRA ) -Centre National de la Recherche Scientifique ( CNRS ), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), and Iuliano, Antonio
Subjects: Physics - Instrumentation and Detectors, neutrino/e: energy spectrum, Physics::Instrumentation and Detectors, Neutrino Detectors and Telescopes (experiments), Oscillation, Nuclear and High Energy Physics, Electron, 01 natural sciences, High Energy Physics - Experiment, charged current, CNGS, Tau neutrino, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], cloud, Muon neutrino, Detectors and Experimental Techniques, physics.ins-det, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], flavor: mixing, Charged current, Mixing (physics), Physics, OPERA, neutrino: sterile, Physique atomique et nucléaire, electron: interaction, neutrino: flavor, neutrino/tau: particle identification, Neutrino, Particle Physics - Experiment, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, Neutrino Detectors and Telescopes (experiments), Oscillation, neutrino: energy, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, showers: electromagnetic, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], flavor: oscillation, 010306 general physics, Neutrino oscillation, hep-ex, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, neutrino/mu: secondary beam, lcsh:QC770-798, S067P13, High Energy Physics::Experiment, neutrino: oscillation, neutrino: mixing, Electron neutrino, experimental results
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 Chambers, 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 π0s, 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 m4 is introduced. At high Δm412 (≳0.1 eV2), an upper limit on sin2 2θμe is set to 0.021 at 90% C.L. and Δm412 ≳ 4 × 10− 3 eV2 is excluded for maximal mixing in appearance mode.[Figure not available: see fulltext.]., SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2018

18. Method of EAS's Cherenkov and fluorescent light separation using silicon photomultipliers

Author: Dmitry Chernov, V. I. Galkin, Michael Finger Jr, Gali Garipov, V. A. Kozhin, Alexander Skurikhin, Timur Dzhatdoev, D. A. Podgrudkov, E. A. Bonvech, and Miroslav Finger
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), History, Materials science, business.industry, Attenuation, Detector, FOS: Physical sciences, Fluorescence, Computer Science Applications, Education, Optics, Silicon photomultiplier, Fluorescent light, Interference (communication), Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Optical filter, business, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cherenkov radiation
Abstract: Preliminary results on the development of a separation method for Cerenkov (CL) and fluorescence (FL) light from EAS are shown. The results are based on the measurement of attenuation coefficients of CL and FL for different filters. A total of six optical filters were investigated: filters from optical glass UFS-1, UFS-5, FS6 (analogue BG3) and interference filters SL 360-50, SL 280-380, FF01-375/110. The measurements were performed using silicon photomultipliers (SiPM). To improve existing fluorescent light detectors, a segment of 7 SiPM was developed, which would be able to separate both components of the light flux from EAS at the level of primary data processing., Comment: 6 pages, 5 figures
Published: 2018
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19. Latest results of the OPERA experiment on nu-tau appearance in the CNGS neutrino beam

Author: G. Mandrioli, Koichi Kodama, T. Shchedrina, D. A. Podgrudkov, G. Sirri, A. M. Anokhina, N. Okateva, H. Pessard, M. Tenti, G. Galati, K. Niwa, Maria Cristina Montesi, Andrey Alexandrov, Satoru Takahashi, Tomoko Ariga, M. Chernyavskiy, F. Pupilli, G. Grella, A. Di Crescenzo, Chiara Sirignano, P. del Amo Sanchez, J. L. Vuilleumier, N. Di Marco, O. Ryazhskaya, C. Pistillo, Caren Hagner, D. Duchesneau, S. Tufanli, Seok Kim, M. Pozzato, A. Hollnagel, P. Monacelli, Björn Wonsak, Masahiro Komatsu, L. Pasqualini, M. T. Muciaccia, Nobuko Kitagawa, V. A. Matveev, Yuri Gornushkin, A. Iuliano, Kazumi Ozaki, A. Sadovsky, C. Gustavino, Cristiano Bozza, Mitsuhiro Nakamura, Nicola D'Ambrosio, F. Terranova, Tatsuhiro Naka, L. Patrizii, Alessandro Paoloni, F. Mizutani, Akitaka Ariga, V. Gentile, Simona Maria Stellacci, Andrey Ustyuzhanin, E. Shibayama, R. Brugnera, N. Agafonova, M. Dracos, A. Chukanov, C. Kamiscioglu, A. M. Guler, Natalia Polukhina, A. Ereditato, S. Dmitrievsky, A. Olchevsky, A. Buonaura, B. D. Park, Shigeki Aoki, S. Simone, A. Garfagnini, S. Dusini, P. F. Loverre, A. Longhin, I. Shakiryanova, A. Pastore, B. Klicek, Timur Dzhatdoev, A. S. Malgin, I. Kreslo, N. I. Starkov, Osamu Sato, Krešimir Jakovčić, Adele Lauria, M. Miyanishi, L. Paparella, A. Schembri, R. A. Fini, F. Fornari, A. Bertolin, T. Matsuo, T. Fukuda, D. Di Ferdinando, J. Goldberg, S. Mikado, Mario Stipčević, Lucia Votano, S. Buontempo, J. Ebert, Katsumi Ishiguro, M. De Serio, A. Meregaglia, Toshiyuki Nakano, S. Vasina, G. De Lellis, P. Strolin, H. Rokujo, Kunihiro Morishima, L. Consiglio, Maša Malenica, S. Gorbunov, Valeri Tioukov, Pierre Vilain, Naotaka Naganawa, M. Roda, M. Spinetti, S. Ogawa, C. Jollet, J. Favier, Luca Stanco, T. Hayakawa, A. Sotnikov, T. Hara, G. Rosa, Gaston Wilquet, T. M. Roganova, N. Mauri, Utku Kose, T. Shiraishi, E. Medinaceli, C. S. Yoon, H. Shibuya, E. Voevodina, M. Kamiscioglu, F. Laudisio, 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, del Amo Sanchez, P, 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, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gorbunov, S, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Ishiguro, K, Iuliano, A, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, S, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Ogawa, S, Olchevsky, A, Okateva, N, Ozaki, K, Paoloni, A, Paparella, L, Park, B, 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, 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, Wilquet, G, Wonsak, B, Yoon, C, 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., del Amo Sanchez, P., 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, Giuliana, 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., Yoon, C. S., Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), OPERA, Laboratoire d'Annecy de Physique des Particules (LAPP), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Particle physics, CERN Lab, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, QC1-999, Opera, FOS: Physical sciences, Neutrino beam, 01 natural sciences, High Energy Physics - Experiment, CNGS, neutrino, High Energy Physics - Experiment (hep-ex), statistical analysis, Tau neutrino, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Statistical analysis, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, Neutrino oscillation, Nuclear Experiment, physics.ins-det, Physics, Large Hadron Collider, hep-ex, 010308 nuclear & particles physics, OPERA, High Energy Physics::Phenomenology, Instrumentation and Detectors (physics.ins-det), neutrino/mu: secondary beam, Gran Sasso, talk: Amsterdam 2018/09/24, neutrino/tau: particle identification, High Energy Physics::Experiment, neutrino: oscillation, statistical, Particle Physics - Experiment, experimental results
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
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20. Detection of reflected Cherenkov light from extensive air showers in the SPHERE experiment as a method of studying superhigh energy cosmic rays

Author: Dmitry Chernov, T. M. Roganova, Timur Dzhatdoev, V. I. Galkin, T. V. Aulova, D. A. Podgrudkov, E. A. Bonvech, and R.A. Antonov
Subjects: Physics, Nuclear and High Energy Physics, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Detector, Cosmic ray, Radiation, Computational physics, Air shower, Optics, Mass spectrum, Calibration, business, Energy (signal processing), Cherenkov radiation
Abstract: Although a large number of experiments were carried out during the last few decades, the uncertainty in the spectrum of all nuclei of primary cosmic rays (PCRs) with superhigh energies is still high, and the results of many experiments on nuclear composition of PCRs are contradictory. An overview of the SPHERE experiment on detecting Vavilov-Cherenkov radiation from extensive air shower (EAS) reflected from a ground snow surface is given. A number of experimental studies implementing this method are presented and their results are analyzed. Some other popular methods of studying PCRs with superhigh energies (E0 > 1015 eV) and their main advantages and drawbacks are briefly considered. The detecting equipment of the SPHERE-2 experiment and the technique of its calibration are considered. The optical properties of snow, which are important for experiments on reflected Cherenkov light (CL) from EAS, are discussed and the history of observing reflected EAS CL is described. The algorithm of simulating the detector response and calculating the fiducial acceptance of shower detection is described. The procedure of processing the experimental data with a subsequent reconstruction of the spectrum of all PCR nuclei and analysis of the mass composition is shown. The first results of reconstructing the spectrum and separating groups of cosmic-ray nuclei with high energies in the SPHERE-2 experiment are presented. Main sources of systematic errors are considered. The prospects of developing the technique of observation of reflected EAS CL in future experiments are discussed.
Published: 2015

21. Extragalactic gamma-ray propagation: beyond the absorption-only model

Author: E. V. Khalikov, A. P. Kircheva, and Timur Dzhatdoev
Subjects: Physics, Extragalactic background light, Oscillation, Cascade, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Gamma ray, Cutoff, Astrophysics, Blazar, Absorption (electromagnetic radiation)
Abstract: Observations of extragalactic sources in the high energy (HE, E>100 MeV) and very high energy (VHE, E>100 GeV) domains allow to search for axion-like particles (ALP) and constrain the extragalactic magnetic field (EGMF) parameters. Such studies have recently received much attention thanks to the advent of new instruments and the progress of the extragalactic background light (EBL) models. Observations of blazars indicate that an additional component from electromagnetic (EM) cascades contributes to the observed flux, allowing for a possibility that the EGMF strength in voids of the large scale structure is smaller than 1 fG on the characteristic spatial scale of 1 Mpc. We consider various extragalactic $\gamma$-ray propagation models with an emphasis on the “electromagnetic cascade model”, which assumes that primary particles are $\gamma$-rays, and has the following spectral signatures: 1) a high-energy cutoff caused by the $\gamma\gamma$→e$^{+}$e$^{−}$ absorption process 2) an “ankle” formed by the intersection of the primary and cascade components 3) a possible low-energy “magnetic cutoff”, 4) a possible low-energy “second ankle” at the second intersection of the primary and cascade components. The ankle may mimic the signature of the $\gamma$-ALP oscillation process. Finally, we consider various species of the “hadronic cascade model”, in which primary particles are protons and nuclei. This model has a number of difficulties, but, nevertheless, is not excluded.
Published: 2017

22. Testing models of extragalactic $\gamma$-ray propagation using observations of extreme blazars in GeV and TeV energy ranges

Author: A. A. Lyukshin, E. V. Khalikov, A. P. Kircheva, and Timur Dzhatdoev
Subjects: Physics, History, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics, 01 natural sciences, Lower limit, Computer Science Applications, Education, Magnetic field, 0103 physical sciences, 010306 general physics, Blazar, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Energy (signal processing)
Abstract: We briefly review contemporary extragalactic {\gamma}-ray propagation models. It is shown that the Extragalactic Magnetic Field (EGMF) strength and structure are poorly known. Strict lower limits on the EGMF strength in voids are of order 10^{-17}--10^{-20} G, thus allowing a substantial contribution of a secondary component generated by electromagnetic cascades to the observable spectrum. We show that this "electromagnetic cascade model" is supported by data from imaging Cherenkov telescopes and the Fermi LAT detector., Comment: Proc. 2nd International Conference on Particle Physics and Astrophysics, Moscow (2016), 5 pages, 4 figures
Published: 2017

23. Study of charged hadron multiplicities in charged-current neutrino-lead interactions in the OPERA detector

Author: Toshiyuki Nakano, G. De Lellis, S. Buontempo, J. Ebert, Ante Ljubičić, A. Sotnikov, G. Sirri, Artem Chukanov, Nicola D'Ambrosio, Tatsuhiro Naka, Akitaka Ariga, N. Agafonova, M. Dracos, Alessandro Paoloni, Shigeki Aoki, G. Rosa, T. M. Roganova, S. Simone, Kunihiro Morishima, Gaston Wilquet, S. Gorbunov, Alessandra Pastore, N. Mauri, F. Mizutani, D. A. Podgrudkov, B. D. Park, T. V. Shchedrina, Björn Wonsak, A. M. Guler, C. Jollet, U. Kose, Alessandro Lauria, S. Dmitrievski, Nobuko Kitagawa, B. Klicek, Giuliana Galati, M. Tenti, A. Longhin, Tomoko Ariga, M. De Serio, T. Shiraishi, C. Kamiscioglu, A. Schembri, M. Chernyavskiy, T. Fukuda, J. L. Vuilleumier, Y. A. Gornushkin, C. Gustavino, M. Malenica, L. Pasqualini, K. Ozaki, N. I. Starkov, Luca Stanco, L. Patrizii, T. Matsuo, Naotaka Naganawa, G. Grella, B. Hosseini, G. Mandrioli, M. Roda, Motoaki Miyanishi, A. Buonaura, P. Strolin, P. Monacelli, Chiara Sirignano, M. Spinetti, S. Dusini, A. Garfagnini, A. B. Aleksandrov, C. S. Yoon, Cristiano Bozza, A. M. Anokhina, E. Shibayama, K. Niwa, N. M. Okateva, V. Gentile, Koichi Kodama, R. A. Fini, E. Medinaceli, Maria Cristina Montesi, Masahiro Komatsu, J. Goldberg, T. Hara, S. Vasina, Osamu Sato, O. G. Ryazhskaya, D. Duchesneau, Seok Kim, M. Pozzato, S. Ogawa, V. A. Matveev, Satoru Takahashi, Caren Hagner, T. Hayakawa, Anselmo Meregaglia, L. Consiglio, F. Terranova, I. Bodnarchuk, A. Di Crescenzo, H. Pessard, A. S. Malgin, I. Shakirianova, F. Fornari, D. Di Ferdinando, S. Mikado, Hiroki Rokujo, Simona Maria Stellacci, M. Kamiscioglu, P. Del Amo Sanchez, Valeri Tioukov, Pierre Vilain, M. T. Muciaccia, Mario Stipčević, Antonio Ereditato, Katsumi Ishiguro, A. Bertolin, Timur Dzhatdoev, Krešimir Jakovčić, N. G. Polukhina, L. Paparella, N. Di Marco, H. Shibuya, E. Voevodina, A. Hollnagel, L. Votano, Mitsuhiro Nakamura, R. Brugnera, F. Laudisio, P. F. Loverre, F. Pupilli, I. Kreslo, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), OPERA, Laboratoire d'Annecy de Physique des Particules ( LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Institut Pluridisciplinaire Hubert Curien ( IPHC ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Strasbourg ( UNISTRA ), Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bertolin, A., Bodnarchuk, I., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Chernyavskiy, M., Chukanov, A., Consiglio, L., D’Ambrosio, N., De Lellis, G., De Serio, M., del Amo Sanchez, P., 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., 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., 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., 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., Shakirianova, 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., Wonsak, B., Yoon, C.S., del Amo&nbsp, Sanchez, P., Fini, R. A., Guler, A. M., Kim, S. H., Montesi, M. C., Muciaccia, M. T., Park, B. D., Stellacci, S. M., Vuilleumier, J. L., Yoon, C. S., Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Bertolin, A, Bodnarchuk, I, Bozza, C, Brugnera, R, Buonaura, A, Buontempo, S, Chernyavskiy, M, Chukanov, A, Consiglio, L, D’Ambrosio, N, De Lellis, G, De Serio, M, del Amo Sanchez, P, 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, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Gentile, V, Goldberg, J, Gornushkin, Y, Gorbunov, S, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Hosseini, B, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, S, 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, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Niwa, K, Okateva, N, Ogawa, S, Ozaki, K, Paoloni, A, Paparella, L, Park, B, 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, Shibuya, H, Shibayama, E, Shiraishi, T, Simone, S, Sirignano, C, Sirri, G, Sotnikov, A, Spinetti, M, Stanco, L, Starkov, N, Stellacci, S, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Vasina, S, Vilain, P, Voevodina, E, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, and Yoon, C
Subjects: Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Opera, Monte Carlo method, Hadron, 01 natural sciences, High Energy Physics - Experiment, charged current, neutrino, CNGS, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], scaling: KNO, charged-current, hadron multiplicities, OPERA, Detectors and Experimental Techniques, physics.ins-det, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Charged current, Physics, Detector, Instrumentation and Detectors (physics.ins-det), Charged particle, 3. Good health, kinematics, Physique des particules élémentaires, neutrino/tau: particle identification, Measurements of neutrino speed, dispersion, Neutrino, numerical calculations: Monte Carlo, Particle Physics - Experiment, Particle physics, FOS: Physical sciences, lcsh:Astrophysics, charged particle: multiplicity, Nuclear physics, Lead (geology), [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], lcsh:QB460-466, 0103 physical sciences, DISTRIBUTIONS, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, OPERA detector, neutrino charge current interactions, multiplicity distribution of charged hadrons, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Engineering (miscellaneous), 010306 general physics, Neutrino oscillation, Physics and Astronomy (miscellaneous), HIGH-ENERGY, charged hadron multiplicities, lead, NUCLEI, hep-ex, hadron: multiplicity, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Multiplicity (mathematics), neutrino nucleus: interaction, neutrino/mu: secondary beam, lcsh:QC770-798, High Energy Physics::Experiment, neutrino: oscillation, EMULSION, SYSTEM, experimental results
Abstract: Section Analysis, line 9: sub-sample of 818 events becomes sub-sample of 817 events., 0, SCOPUS: er.j, info:eu-repo/semantics/published
Published: 2017
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24. Search for sterile neutrinos in muon neutrino disappearance mode at FNAL

Author: M. Calabrese, R. Mingazheva, S. Simone, M. T. Muciaccia, V. Togo, G. Sirri, A. Cecchetti, M. Pozzato, R. Brugnera, Chiara Sirignano, Utku Kose, Alessandro Paoloni, Gaetano Fiore, F. Dal Corso, Gianfranca De Rosa, P. Bernardini, A. Longhin, O. Morgunova, M. Chernyavskiy, G. Marsella, M. Roda, G. De Robertis, S. Cecchini, A. V. Bagulya, N. G. Polukhina, A. Garfagnini, D. Orecchini, G. Mancarella, D. Di Ferdinando, M. Tenti, O. Dalkarov, F. Loddo, M. De Serio, Annarita Margiotta, Alessandro Pastore, Maurizio Spurio, A. Surdo, Ivano Lippi, G. Papadia, M. Vladymyrov, Mario Stipčević, R. A. Fini, A. Del Prete, Z. Sahnoun, T. V. Shchedrina, Timur Dzhatdoev, Krešimir Jakovčić, L. Paparella, G. Laurenti, B. Klicek, N. I. Starkov, M. Benettoni, Luca Stanco, Marzio Nessi, T. M. Roganova, N. Mauri, M. Malenica, L. Pasqualini, L. Patrizii, G. Mandrioli, E. Medinaceli, S. Dusini, M. Guerzoni, A. M. Anokhina, Anokhina, A., Bagulya, A., Benettoni, M., Bernardini, P., Brugnera, R., Calabrese, Maurizio, Cecchetti, A., Cecchini, S., Chernyavskiy, M., Dal Corso, F., Dalkarov, O., Del Prete, A., De Robertis, G., De Serio, M., Di Ferdinando, D., Dusini, S., Dzhatdoev, T., Fini, R. A., Fiore, G., Garfagnini, A., Guerzoni, M., Klicek, B., Kose, U., Jakovcic, K., Laurenti, G., Lippi, I., Loddo, F., Longhin, A., Malenica, M., Mancarella, G., Mandrioli, G., Margiotta, A., Marsella, G., Mauri, N., Medinaceli, E., Mingazheva, R., Morgunova, O., Muciaccia, M. T., Nessi, M., Orecchini, D., Paoloni, A., Papadia, G., Paparella, L., Pasqualini, L., Pastore, A., Patrizii, L., Polukhina, N., Pozzato, M., Roda, M., Roganova, T., Rosa, G., Sahnoun, Z., Shchedrina, T., Simone, S., Sirignano, C., Sirri, G., Spurio, M., Stanco, L., Starkov, N., Stipcevic, M., Surdo, A., Tenti, M., Togo, V., Vladymyrov, M., Anokhina, A, Bagulya, A, Benettoni, M, Bernardini, P, Brugnera, R, Calabrese, M, Cecchetti, A, Cecchini, S, Chernyavskiy, M, Dal Corso, F, Dalkarov, O, Del Prete, A, De Robertis, G, De Serio, M, Di Ferdinando, D, Dusini, S, Dzhatdoev, T, Fini, R, Fiore, G, Garfagnini, A, Guerzoni, M, Klicek, B, Kose, U, Jakovcic, K, Laurenti, G, Lippi, I, Loddo, F, Longhin, A, Malenica, M, Mancarella, G, Mandrioli, G, Margiotta, A, Marsella, G, Mauri, N, Medinaceli, E, Mingazheva, R, Morgunova, O, Muciaccia, M, Nessi, M, Orecchini, D, Paoloni, A, Papadia, G, Paparella, L, Pasqualini, L, Pastore, A, Patrizii, L, Polukhina, N, Pozzato, M, Roda, M, Roganova, T, Rosa, G, Sahnoun, Z, Shchedrina, T, Simone, S, Sirignano, C, Sirri, G, Spurio, M, Stanco, L, Starkov, N, Stipcevic, M, Surdo, A, Tenti, M, Togo, V, Vladymyrov, M, DIP. DI FISICA, DIPARTIMENTO DI FISICA E ASTRONOMIA 'AUGUSTO RIGHI', Da definire, AREA MIN. 02 - Scienze fisiche, Calabrese, M., Fini, R.A., and Muciaccia, M.T.
Subjects: Sterile neutrino, Particle physics, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, neutrino oscillations, sterile neutrinos, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Muon neutrino, Fermilab, Detectors and Experimental Techniques, Engineering (miscellaneous), 010306 general physics, Neutrino oscillation, physics.ins-det, Particle Physics - Phenomenology, Physics, hep-ex, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, hep-ph, Instrumentation and Detectors (physics.ins-det), Massless particle, High Energy Physics - Phenomenology, Neutrino detector, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, sterile neutrino, short baseline, Particle Physics - Experiment, Lepton
Abstract: The NESSiE Collaboration has been setup to undertake a conclusive experiment to clarify the {\em muon--neutrino disappearance} measurements at short baselines in order to put severe constraints to models with more than the three--standard neutrinos. To this aim the current FNAL--Booster neutrino beam for a Short--Baseline experiment was carefully evaluated by considering the use of magnetic spectrometers at two sites, near and far ones. The detector locations were studied, together with the achievable performances of two OPERA--like spectrometers. The study was constrained by the availability of existing hardware and a time--schedule compatible with the undergoing project of multi--site Liquid--Argon detectors at FNAL. The settled physics case and the kind of proposed experiment on the Booster neutrino beam would definitively clarify the existing tension between the $\nu_{\mu}$ disappearance and the $\nu_e$ appearance/disappearance at the eV mass scale. In the context of neutrino oscillations the measurement of $\nu_{\mu}$ disappearance is a robust and fast approach to either reject or discover new neutrino states at the eV mass scale. We discuss an experimental program able to extend by more than one order of magnitude (for neutrino disappearance) and by almost one order of magnitude (for antineutrino disappearance) the present range of sensitivity for the mixing angle between standard and sterile neutrinos. These extensions are larger than those achieved in any other proposal presented so far., Comment: 19 pages, published in EPJC
Published: 2017

25. Cascade model of the anomaly in blazar spectra at very high energies

Author: Timur Dzhatdoev
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Photon, Component (thermodynamics), Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, General Physics and Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Spectral line, Cascade, Anomaly (physics), Astrophysics - High Energy Astrophysical Phenomena, Blazar, Absorption (electromagnetic radiation)
Abstract: It is well known that the effect of gamma-ray absorption on extragalactic background light (EBL) is weakly expressed in the spectra of some blazars. It is shown that a secondary component generated by electromagnetic cascades might considerably decrease the statistical significance of this anomaly. Observational results indicate the existence of the cascade component in the spectra of extragalactic gamma-ray sources, thus supporting the proposed model., Comment: 6 pages, 2 figures. Original Russian text: Izvestiya Rossiiskoi Akademii Nauk, 79, 363 (2015) (In print) (author's translation)
Published: 2015

26. Investigation of SPHERE-2 data sensitivity to chemical composition of primary cosmic rays

Author: T. M. Roganova, Timur Dzhatdoev, Mikh. Finger, M. Finger, R.A. Antonov, S. P. Besshapov, T. I. Sysoeva, E. A. Bonvech, S. B. Shaulov, Dmitry Chernov, V. I. Galkin, A. S. Petkun, T. V. Aulova, and D. A. Podgrudkov
Subjects: Physics, Range (particle radiation), Primary (astronomy), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Cosmic ray, Astrophysics, Sensitivity (control systems), Chemical composition, Cherenkov radiation
Abstract: A new method for assessing the type of particles of primary cosmic rays in the energy range of 10–1000 PeV for individual events recorded by the SPHERE-2 facility is presented. The method is based on comparing images of recorded events and simulated events, while assuming various types of primary particles with allowance for measuring errors. The aim of the study is to find the limits of sensitivity in determining of the chemical composition of ultrahigh-energy primary cosmic rays using the detection of reflected Cherenkov light generated by extensive air showers (EASes).
Published: 2015

27. Search for the νμ → ντ oscillation with the OPERA hybrid detector

Author: S. Zemskova, V. F. Yakushev, N. G. Polukhina, Artem Chukanov, T. M. Roganova, Yu. A. Gornushkin, A. S. Malgin, G. Shoziyoev, I. R. Shakyrianova, A. Sheshukov, V. G. Ryasny, M. S. Vladimirov, A.G. Olshevsky, V. L. Troshina, A. B. Aleksandrov, A. V. Bagulya, Dmitry V. Naumov, T. V. Shedrina, R. I. Enikeev, Timur Dzhatdoev, A. M. Anokhina, D. K. Levashev, V. Nikitina, V. A. Matveev, D. A. Podgrudkov, S. Dmitrievski, M. Chernyavskiy, N. M. Okateva, N. I. Starkov, O. G. Ryazhskaya, and N. Yu. Agafonova
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Oscillation, Opera, Detector, Nuclear emulsion, Neutrino beam, Neutrino oscillation, Event (particle physics), Charged current
Abstract: This work reviews the status of the international OPERA experiment aimed at searching for the νμ → ντ oscillation. Development of the emulsion techniques in the preceding DONUT and CHORUS experiments is described. A brief overview of the NOMAD experiment is given, in which properties of ντ interactions were thoroughly investigated. Characteristics of the CERN-Gran Sasso (CNGS) neutrino beam are given, the structure of the OPERA hybrid detector and the functions of its subsystems are considered, and the automatic emulsion scanning technique is briefly reviewed. Uncertainties in reconstruction of event parameters using the electronic and emulsion detectors are discussed and the procedure adopted in the experiment for identification of ντ interactions is described. The main sources of background in the search for νμ → ντ oscillation are considered. Topologies of the first two ντ candidates observed in the OPERA emulsion detector are presented. Possibilities of increasing the ντ interaction selection efficiency using multidimensional criteria are briefly discussed.
Published: 2013

28. Electromagnetic cascade masquerade: a way to mimic $\gamma$--axion-like particle mixing effects in blazar spectra

Author: E. V. Khalikov, Timur Dzhatdoev, A. P. Kircheva, and A. A. Lyukshin
Subjects: Physics, Proton, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Cosmic background radiation, Astronomy and Astrophysics, Observable, Astrophysics, 01 natural sciences, Spectral line, Redshift, Space and Planetary Science, Cascade, 0103 physical sciences, Blazar, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics
Abstract: Context. Most of the studies on extragalactic {\gamma}-ray propagation performed up to now only accounted for primary gamma-ray absorption and adiabatic losses ("absorption-only model"). However, there is growing evidence that this model is oversimplified and must be modified in some way. In particular, it was found that the intensity extrapolated from the optically-thin energy range of some blazar spectra is insufficient to explain the optically-thick part of these spectra. This effect was interpreted as an indication for {\gamma}-axion-like particle (ALP) oscillation. On the other hand, there are many hints that a secondary component from electromagnetic cascades initiated by primary {\gamma}-rays or nuclei may be observed in the spectra of some blazars. Aims. We study the impact of electromagnetic cascades from primary {\gamma}-rays or protons on the physical interpretation of blazar spectra obtained with imaging Cherenkov telescopes. Methods. We use the publicly-available code ELMAG to compute observable spectra of electromagnetic cascades from primary {\gamma}-rays. For the case of primary proton, we develop a simple, fast and reasonably accurate hybrid method to calculate the observable spectrum. We perform the fitting of the observed spectral energy distributions (SEDs) with various physical models: the absorption-only model, the "electromagnetic cascade model" (for the case of primary {\gamma}-rays), and several versions of the hadronic cascade model (for the case of primary proton). We distinguish the following species of hadronic cascade models: 1) "basic hadronic model", where it is assumed that the proton beam travels undisturbed by extragalactic magnetic field and that all observable {\gamma}-rays are produced by primary protons through photohadronic processes with subsequent development of electromagnetic cascades /abridged, Comment: Accepted by A&A. 25 pages, 31 figures. Corrected fig. 5, fig. 7; new explanations for fig. 6--7; several typos fixed wrt v. 1
Published: 2016

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

Author: Adele Lauria, T. M. Roganova, C. Göllnitz, J. L. Vuilleumier, K. Ozaki, M. Spinetti, G. Shoziyoev, R. A. Fini, N. Mauri, Yoshihiro Sato, D. Goloubkov, A. Buonaura, Akitaka Ariga, N. Agafonova, M. Dracos, Shigeki Aoki, L. Votano, Björn Wonsak, S. Buontempo, Chiara Sirignano, M. T. Muciaccia, D. A. Podgrudkov, S. Dmitrievski, J. Ebert, A. Longhin, Koichi Kodama, A. Garfagnini, Murat Guler, G. Sirri, Artem Chukanov, Antonio Ereditato, C. Kamiscioglu, Cristiano Bozza, N. M. Okateva, T. V. Shchedrina, Amina Zghiche, Yu. Zaitsev, N. Di Marco, D. Duchesneau, A. Schembri, G. Grella, C. Pistillo, T. Hara, A.G. Olshevsky, T. Matsuo, S. Simone, Nicola D'Ambrosio, Toshiyuki Nakano, B. Büttner, Mitsuhiro Nakamura, Luca Stanco, R. Brugnera, G. De Lellis, Tatsuhiro Naka, A. Sheshukov, Ante Ljubičić, S. Zemskova, I. Rostovtseva, C. Gustavino, Seok Kim, N. I. Starkov, Alessandro Paoloni, M. Pozzato, Caren Hagner, Natalia Polukhina, Masahiro Komatsu, Valeri Tioukov, Utku Kose, F. Pupilli, Kunihiro Morishima, Satoru Takahashi, M. S. Vladimirov, Pierre Vilain, Y. Nakatsuka, L. Consiglio, Jiro Kawada, T. Shiraishi, I. Shakiryanova, J. Goldberg, H. Shibuya, T. Omura, F. Terranova, M. Tenti, V. A. Matveev, B. Klicek, Timur Dzhatdoev, Alessandro Pastore, A. Bertolin, Giuliana Galati, Tomoko Ariga, M. De Serio, A. Hollnagel, Yuri Gornushkin, Maximiliano Sioli, M. Kamiscioglu, D. Bender, Krešimir Jakovčić, G. Giacomelli, Mario Stipčević, H. Ishida, P. Monacelli, Katsumi Ishiguro, A. B. Aleksandrov, C. S. Yoon, T. Fukuda, K. Niwa, Maria Cristina Montesi, Anselmo Meregaglia, G. Rosa, Gaston Wilquet, P. F. Loverre, I. Kreslo, I. G. Park, J. Lenkeit, S. M. Stellacci, Nobuko Kitagawa, Naotaka Naganawa, M. Roda, P. Strolin, Manuel Meyer, A. Di Crescenzo, A. M. Anokhina, O. G. Ryazhskaya, S. Ogawa, M. M. Chernyavsky, S. Tufanli, B. D. Park, C. Jollet, Hiroki Rokujo, P. Del Amo Sanchez, M. Malenica, L. Pasqualini, L. Patrizii, B. Hosseini, G. Mandrioli, E. Medinaceli, S. Dusini, A. S. Malgin, D. Di Ferdinando, S. Mikado, J. H. Kim, H. Pessard, Osamu Sato, Agafonova, N., DE LELLIS, Giovanni, DI CRESCENZO, Antonia, Buonaura, Annarita, Galati, Giuliana, Lauria, Adele, Montesi, MARIA CRISTINA, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), OPERA, Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Bender, D, Bertolin, A, Bozza, C, Brugnera, R, Buonaura, A, Buontempo, S, Büttner, B, Chernyavsky, M, Chukanov, A, Consiglio, L, D'Ambrosio, N, Lellis, G, Serio, M, Sanchez, P, Crescenzo, A, Ferdinando, D, Marco, N, Dmitrievski, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Ereditato, A, Fini, R, Fukuda, T, Galati, G, Garfagnini, A, Giacomelli, G, Göllnitz, G, Goldberg, J, Goloubkov, D, Gornushkin, Y, Grella, G, Guler, M, Gustavino, C, Hagner, C, Hara, T, Hollnagel, A, Hosseini, B, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kawada, J, Kim, J, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Lauria, A, Lenkeit, J, Ljubicic, A, Longhin, A, Loverre, P, Malgin, A, Malenica, M, Mandrioli, G, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meregaglia, A, Meyer, M, Mikado, S, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nakatsuka, Y, Niwa, K, Ogawa, S, Okateva, N, Olshevsky, A, Omura, T, Ozaki, K, Paoloni, A, Park, B, Park, I, Pasqualini, L, Pastore, A, Patrizii, L, Pessard, H, Pistillo, C, Podgrudkov, D, Polukhina, N, Pozzato, M, Pupilli, F, Roda, M, Rokujo, H, Roganova, T, Rosa, G, Rostovtseva, I, Ryazhskaya, O, Sato, O, Sato, Y, Schembri, A, Shakiryanova, 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, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, Zaitsev, Y, Zemskova, S, Zghiche, A, Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., Bozza, C., Brugnera, R., Buonaura, A., Buontempo, S., Büttner, B., Chernyavsky, M., Chukanov, A., Consiglio, L., D'Ambrosio, N., Lellis, G. De, Serio, M. De, Sanchez, P. Del Amo, Crescenzo, A. Di, Ferdinando, D. Di, Marco, N. Di, Dmitrievski, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Fini, R.A., Fukuda, T., Galati, G., Garfagnini, A., Giacomelli, G., Göllnitz, G., Goldberg, J., Goloubkov, D., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kawada, J., Kim, J.H., Kim, S.H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Malenica, M., Mandrioli, G., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meregaglia, A., Meyer, M., 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., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., 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., Rokujo, H., Roganova, T., Rosa, G., Rostovtseva, I., Ryazhskaya, O., Sato, O., Sato, Y., Schembri, A., Shakiryanova, 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., Vladimirov, M., Votano, L., Vuilleumier, J.L., Wilquet, G., Wonsak, B., Yoon, C.S., Zaitsev, Y., Zemskova, S., and Zghiche, A.
Subjects: Particle physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Monte Carlo method, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Neutrino detector, Nuclear physics, Momentum, High Energy Physics - Experiment (hep-ex), Muon spectrometer, Particle tracking detectors, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Neutrino detectors, muon, spectrometer, neutrino, 010306 general physics, Instrumentation, Mathematical Physics, Large detector-systems performance, Physics, Muon, Muon spectrometers, muon spectrometers, neutrino detectors, large detector-systems performance, particle tracking detectors, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Charge (physics), Instrumentation and Detectors (physics.ins-det), Particelle elementari, Particle tracking detector, Spettrometro magnetico, Dipole, Rivelatore di neutrini, Physique des particules élémentaires, High Energy Physics::Experiment, Neutrino, Beam (structure)
Abstract: The OPERA long-baseline neutrino-oscillation experiment has observed the direct appearance of ντ in the CNGS νμ beam. Two large muon magnetic spectrometers are used to identify muons produced in the τ leptonic decay and in νμ CC interactions by measuring their charge and momentum. Besides the kinematic analysis of the τ decays, background resulting from the decay of charmed particles produced in νμ CC interactions is reduced by efficiently identifying the muon track. A new method for the charge sign determination has been applied, via a weighted angular matching of the straight track-segments reconstructed in the different parts of the dipole magnets. Results obtained for Monte Carlo and real data are presented. Comparison with a method where no matching is used shows a significant reduction of up to 40% of the fraction of wrongly determined charges., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2016

30. Present status of the opera experiment for the direct observation of neutrino oscillations in the νμ → ν τ channel

Author: G. P. Shozieev, M. S. Vladimirov, T. M. Roganova, O. G. Ryazhskaya, R. I. Enikeev, Timur Dzhatdoev, A. G. Ol’shevskii, Yu. A. Gornushkin, A. Sheshukov, A. S. Malgin, A. M. Anokhina, Natalia Polukhina, N. Yu. Agafonova, M. M. Chernyavskii, V. Nikitina, A. B. Aleksandrov, V. F. Yakushev, S. G. Dmitrievskii, Artem Chukanov, Viktor Matveev, V. G. Ryasnyi, N. I. Starkov, S. Zemskova, and Dmitry V. Naumov
Subjects: Nuclear physics, Physics, Particle physics, Muon, Opera, Hadron, General Physics and Astronomy, Measurements of neutrino speed, Nuclear emulsion, Neutrino, Solar neutrino problem, Neutrino oscillation
Abstract: The OPERA experiment (Oscillation Project with an Emulsion-Tracking Apparatus) for the direct observation of neutrino oscillations in the νμ → ντ channel has been underway at the underground laboratory in Gran Sasso since 2007. In the course of data collection, more than 3000 νμ interactions have been registered in emulsion detectors. Twenty charmed neutrino interaction candidates have been found. Multidimensional criteria have been developed in order to select ντ interactions against νμ interactions accompanied by charmed hadron production. The first results from automated PAVIKOM emulsion scanning have been obtained. We discuss the measurements of the muon charge ratio of μ+ to μ−.
Published: 2011

31. On the sensitivity of the spatial-angular distribution of the Cherenkov light in extensive air showers to the mass composition of primary cosmic rays with energies of 1015–1016 eV

Author: Timur Dzhatdoev and V. I. Galkin
Subjects: Physics, Angular distribution, Primary (astronomy), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, General Physics and Astronomy, Cosmic ray, Sensitivity (control systems), Astrophysics, Mass composition, Cherenkov radiation, Computational physics
Abstract: This paper analyses the possibility of separating distinct groups of nuclei of primary cosmic rays with energies of 1015–1016 eV from the data on the spatial-angular distribution of Cherenkov light in extensive air showers. The paper shows that using an array of a few (3–4) telescopes with a moderately sized angular cell ∼0.5° placed at a distance ∼100 m from one another, one can achieve almost complete separation of the showers initiated by these nuclei (the Bayesian classification error is a few percentage points for the case of separating primary protons and nitrogen nuclei). The authors propose new parameters of the angular Cherenkov image that can greatly enhance the separability of the shower classes as compared to the approach based on the traditional parameters.
Published: 2010

32. Simulation of tau neutrino interaction in an emulsion track detector

Author: Timur Dzhatdoev, V. Nikitina, A. M. Anokhina, T. M. Roganova, and V. I. Galkin
Subjects: Physics, Particle physics, Basis (linear algebra), Physics::Instrumentation and Detectors, business.industry, Track (disk drive), Detector, General Physics and Astronomy, Software, Tau neutrino, Vertex (curve), Neutrino, business, Neutrino oscillation
Abstract: Simulation of the interactions between tau neutrinos ντ and the material of the emulsion track detector using Geant4 software is described. The purpose of the work is to generate artificial events and to estimate, on their basis, the reconstruction accuracy for the geometric parameters (vertex coordinates, impact parameters, and track kink angles) and distributions of these parameters used in the selection criteria of the OPERA experiment.
Published: 2009

33. Method for measuring the PCR proton spectrum in the energy range of > 1016 eV

Author: Dmitry Chernov, A. M. Anokhina, S. B. Shaulov, T. M. Roganova, R.A. Antonov, E. A. Bonvech, A. A. Kirillov, Timur Dzhatdoev, and V. I. Galkin
Subjects: Nuclear physics, Physics, Proton, Monte Carlo method, Detector, Cosmic ray, Field of view, Focal surface, Zenith, Cherenkov radiation, Electronic, Optical and Magnetic Materials, Computational physics
Abstract: Criteria for selecting proton events among the total sequence of events from primary nuclei of cosmic rays with zenith angles θ 10 PeV; at lower energies, the average mass composition is almost unchanged. The method used in (3, 4) is based on the correlation of the Cherenkov light (CL) pulse halfwidth at a long distance from the shower axis with the shower maximum position. It is well known that the CL transverse distribution function (TDF) is also sensitive to the primary nucleus mass. However, CL detectors of ground-based installations collect light from only a small fraction of the shower area; therefore, detailed reconstruction of the CL TDF is complicated. In the SPHERE-2 experiment, it is intended to use the shape of CL TDF to determine the PCR composition, since detectors of this installation can survey about half the shower area. The operating principle of this telescope is based on the idea to measure CL produced by extended atmospheric showers (EAS) and reflected from the snow surface (7). The optical scheme of the SPHERE-2 installation represents a Schmidt camera with a mirror 1.5 m in diameter and a mosaic of 109 photomultipliers in the mirror focal surface. Thus, this system allows measurements of the quantity proportional to the total CL amount within the field of view of each detector of the mosaic. In this paper, the criteria allowing separation of a certain known proton fraction from the total number of PCR nuclei are studied using the Monte Carlo method. The Lake Baikal level (H0 = 455 m above sea level) and the detector spatial resolution δr =8 0m corresponding to the SPHERE-2 installation position at a height of 1 km over the snow surface of Lake Baikal are considered. In this case, the diameter
Published: 2009

34. The possibility of observing resonance gamma-ray absorption in the spectra of active galactic nuclei

Author: V. I. Galkin, A. F. Iyudin, and Timur Dzhatdoev
Subjects: Physics, Active galactic nucleus, Absorption spectroscopy, Space and Planetary Science, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Resonance, Astronomy and Astrophysics, Atomic physics, Viewing angle, Optical depth, Beam (structure), Spectral line
Abstract: The Geant 4.8.1 program package has been used to carry out Monte Carlo simulations of resonance features arising in gamma-ray spectra due to the passage of the photons through a large amount of neutral, stationary material under conditions corresponding to those in active galactic nuclei (AGNs). The dependences of the depth and shape of resonance features on the optical depth and geometry of the absorbing material, as well as parameters of the initial spectrum, are analyzed. Special attention is paid to the dependence of the spectrum on the viewing angle for the observations relative to the symmetry axis of a beam of gamma-rays, for viewing angles from fractions of a degree to several tens of degrees. It is shown that Δ-resonance absorption with appreciable depths (>10%) can appear in the gamma-ray spectra of AGNs only if observations are made at small angles (
Published: 2009

35. On conservative models of 'the pair-production anomaly' in blazar spectra at Very High Energies

Author: Timur Dzhatdoev
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), History, Photon, Physics beyond the Standard Model, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, Astrophysics, Redshift, Computer Science Applications, Education, Pair production, Extragalactic background light, Anomaly (physics), Blazar, Astrophysics - High Energy Astrophysical Phenomena
Abstract: For some blazars, the gamma-ray absorption features due to pair-production on the Extragalactic Background Light (EBL) are fainter than expected. The present work reviews the main models that could explain this paradox, with emphasis on conservative ones, that do not include any new physics. The models that are intrinsic to the source, do allow a very hard primary spectrum, but fail to explain a regular redshift dependence of the anomaly starting energy. The model that includes a contribution from secondary photons produced by cosmic rays (CR) near the Earth seems to require a well collimated CR beam, what is hard to achieve. Finally, the model with secondary photons produced in electromagnetic (EM) cascades initiated by primary gamma-rays is considered. In principle, it allows to decrease the statistical significance of the anomaly and, while requiring quite low EGMF strength B, does not contradict to most contemporary constraints on the B value. Additionally, it is shown that the recently observed correlation between directions to hard gamma-ray sources and voids in the Large Scale Structure is a natural feature of the EM cascade model., 8 pages, 4 figures. This paper tries to summarize the status of the field by the end of January, 2015. In v. 2 several typos were corrected
Published: 2015

36. The OPERA experiment

Author: I. Shakiryanova, Timur Dzhatdoev, D. Bender, Krešimir Jakovčić, Antonio Ereditato, Y. Nakatsuka, M. Spinetti, A.G. Olshevsky, G. Shoziyoev, M. Tenti, C. Pistillo, A. Longhin, Murat Guler, Björn Wonsak, Tomoko Ariga, M. De Serio, Nobuko Kitagawa, A. Di Crescenzo, Koichi Kodama, S. Ogawa, C. Kamiscioglu, C. Gustavino, Kazumi Ozaki, D. Duchesneau, A. S. Malgin, Amina Zghiche, A. Schembri, A. M. Anokhina, Seok Kim, T. Fukuda, N. I. Starkov, S. Zemskova, M. Pozzato, Satoru Takahashi, J. L. Vuilleumier, T. Matsuo, Naotaka Naganawa, H. Ishida, A. Buonaura, D. Di Ferdinando, L. Pasqualini, O. Ryazhskaya, P. Monacelli, L. Patrizii, M. Roda, Valeri Tioukov, Pierre Vilain, Yuri Gornushkin, B. Hosseini, G. Mandrioli, S. Mikado, Cristiano Bozza, M. Malenica, J. H. Kim, Masahiro Komatsu, E. Medinaceli, Ante Ljubičić, T. Shchedrina, Toshiyuki Nakano, A. B. Aleksandrov, S. Dusini, D. A. Podgrudkov, A. Garfagnini, Anselmo Meregaglia, M. M. Chernyavsky, Thomas Strauss, G. De Lellis, S. Dmitrievski, Akitaka Ariga, Alessandro Paoloni, N. Okateva, H. Pessard, M. S. Vladimirov, Osamu Sato, N. Agafonova, M. Dracos, Adele Lauria, Natalia Polukhina, F. Pupilli, G. Sirri, Shigeki Aoki, Hiroki Rokujo, G. Grella, G. Galati, Simona Maria Stellacci, S. Simone, A. Chukanov, A. Hollnagel, Caren Hagner, K. Niwa, Maria Cristina Montesi, C. Göllnitz, H. Shibuya, Kunihiro Morishima, S. Tufanli, P. Del Amo Sanchez, B. Klicek, L. Consiglio, F. Terranova, L. Votano, A. Sheshukov, M. Kamiscioglu, P. Strolin, B. D. Park, Viktor Matveev, C. Jollet, Alessandro Pastore, Mario Stipčević, Katsumi Ishiguro, P. F. Loverre, I. Kreslo, R. A. Fini, I. G. Park, J. Lenkeit, M. T. Muciaccia, M. Nakamura, N. Di Marco, Chiara Sirignano, R. Brugnera, Nicola D'Ambrosio, Tatsuhiro Naka, J. Goldberg, S. Buontempo, J. Ebert, B. Büttner, Jiro Kawada, A. Bertolin, G. Giacomelli, C. S. Yoon, Utku Kose, T. Shiraishi, Maximiliano Sioli, Luca Stanco, T. Omura, G. Rosa, Gaston Wilquet, T. M. Roganova, N. Mauri, T. Hara, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Bender, D., Bertolin, A., 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., Del Amo Sanchez, P., 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., Giacomelli, G., Göllnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Guler, M., Gustavino, C., Hagner, C., Hara, T., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Kamiscioglu, C., Kamiscioglu, M., Kawada, J., Kim, J.H., Kim, S.H., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., 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., Okateva, N., Olshevsky, A., Omura, T., Ozaki, K., Paoloni, A., 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., Rokujo, H., Roganova, T., Rosa, G., Ryazhskaya, O., Sato, O., Schembri, A., Shakiryanova, 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., Strauss, T., Strolin, P., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J.L., Wilquet, G., Wonsak, B., Yoon, C.S., Zemskova, S., Zghiche, A., Diego Restrepo and Angelo Raffaele Fazio, DE LELLIS, Giovanni, DI CRESCENZO, Antonia, Fini, R. A., Kim, J. H., Kim, S. H., Lauria, Adele, Montesi, MARIA CRISTINA, Muciaccia, M. T., Park, B. D., Park, I. G., Stellacci, S. M., Vuilleumier, J. L., Yoon, C. S., Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Bender, D, Bertolin, A, 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, Del Amo Sanchez, P, 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, Fukuda, T, Galati, G, Garfagnini, A, Giacomelli, G, Göllnitz, C, Goldberg, J, Gornushkin, Y, Grella, G, Guler, M, Gustavino, C, Hagner, C, Hara, T, Hollnagel, A, Hosseini, B, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kawada, J, Kim, J, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Lauria, A, Lenkeit, J, Ljubicic, A, Longhin, A, Loverre, P, Malgin, A, Malenica, M, Mandrioli, G, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meregaglia, A, Mikado, S, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nakatsuka, Y, Niwa, K, Ogawa, S, Okateva, N, Olshevsky, A, Omura, T, Ozaki, K, Paoloni, A, Park, B, Park, I, Pasqualini, L, Pastore, A, Patrizii, L, Pessard, H, Pistillo, C, Podgrudkov, D, Polukhina, N, Pozzato, M, Pupilli, F, Roda, M, Rokujo, H, Roganova, T, Rosa, G, Ryazhskaya, O, Sato, O, Schembri, A, Shakiryanova, 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, Stipcevic, M, Strauss, T, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, Zemskova, S, and Zghiche, A
Subjects: ICARUS, Physics, Particle physics, Nuclear and High Energy Physics, Large Hadron Collider, Muon, 530 Physics, Physics::Instrumentation and Detectors, Opera, Solar neutrino problem, Nuclear physics, Physique des particules élémentaires, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Neutrino oscillation
Abstract: The OPERA experiment was designed to study νμ→ντ oscillations in appearance mode using the CERN to Gran Sasso high energy neutrino beam. From 2008 to 2012, 19505 CNGS neutrino interactions were recorded in the OPERA detector. At the present status of the analysis, 4 ντ candidate events have been observed, establishing the oscillation mechanism in the atmospheric sector with a significance of 4.2 σ. The oscillation analysis will be presented in detail and the candidate events will be described. The final measurement of the atmospheric muon charge ratio in the TeV region will be also reported., SCOPUS: cp.j, info:eu-repo/semantics/published
Published: 2015

37. Event-by-event study of CR composition with the SPHERE experiment using the 2013 data

Author: V. I. Galkin, Dmitry Chernov, E. A. Bonvech, R.A. Antonov, Mich. Finger, D. A. Podgrudkov, T. M. Roganova, Timur Dzhatdoev, M. Finger, and T. V. Aulova
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), History, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Cosmic ray, Radiation, Snow, Computer Science Applications, Education, Computational physics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Event (particle physics), Instrumentation and Methods for Astrophysics (astro-ph.IM), Cherenkov radiation
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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38. The VHE anomaly in blazar spectra and related phenomena

Author: E. V. Khalikov, A. P. Kircheva, Timur Dzhatdoev, and A. A. Lyukshin
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE), Physics, QC1-999, Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, Astrophysics, 01 natural sciences, Spectral line, Magnetic field, Cascade, 0103 physical sciences, Intergalactic travel, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, Blazar, 010303 astronomy & astrophysics, Phenomenology (particle physics)
Abstract: Most of the recent research on extragalactic $\gamma$-ray propagation focused on the study of the $\gamma\gamma \rightarrow e^{+}e^{-}$ absorption process ("absorption-only model"). Starting from a possible anomaly at very high energies (VHE, E >100 GeV), we briefly review several existing deviations from this model. The exotic interpretation of the VHE anomaly is not supported by the recent works. On the other hand, the process of intergalactic electromagnetic cascade development naturally explains these effects. We discuss phenomenology of intergalactic cascades and the main spectral signatures of the electromagnetic cascade model. We also briefly consider the hadronic cascade model; it also may explain the data, but requires low strength of magnetic field around the source of primary protons or nuclei., Comment: Proc. ISVHECRI-2016 conference, Moscow (2016), 6 pages, 14 figures
Published: 2017

39. Evidence forνμ→ντappearance in the CNGS neutrino beam with the OPERA experiment

Author: I. Kreslo, Alessandro Pastore, Mario Stipčević, Katsumi Ishiguro, Akitaka Ariga, S. Zemskova, N. Agafonova, Shigeki Aoki, V. Matveev, Satoru Takahashi, Gianfranca De Rosa, A. Bertolin, Yoshihiro Sato, Björn Wonsak, D. Autiero, T. Hayakawa, O. G. Ryazhskaya, Vitaliano Chiarella, Ante Ljubičić, Anselmo Meregaglia, M. T. Muciaccia, G. Giacomelli, G. Shoziyoev, C. Kamiscioglu, Alessandro Paoloni, A. Di Crescenzo, L. Stanco, Koichi Kodama, R. Brugnera, M. Hierholzer, T. Fukuda, M. Ishikawa, F. Brunet, R. Rescigno, Salvatore Buontempo, J. Yoshida, Naotaka Naganawa, André Rubbia, M. Roda, J. L. Vuilleumier, K. Ozaki, J. Ebert, A. Longhin, B. Klicek, Gaston Wilquet, Giuliana Galati, J. Marteau, E. Pennacchio, A. Badertscher, A. Buonaura, M. Spinetti, L. Patrizii, J. H. Kim, K. Hakamata, A. Hollnagel, A. Garfagnini, B. Hosseini, G. Mandrioli, A.G. Olshevsky, A. Schembri, F. Pupilli, T. Omura, Toshiyuki Nakano, S. Dusini, T. Matsuo, G. De Lellis, D. Duchesneau, Cristiano Bozza, S. Simone, T. Hara, N. M. Okateva, B. Büttner, P. Strolin, Kunihiro Morishima, W. Schmidt-Parzefal, H. Pessard, M. Nakamura, M. Kimura, Thomas Strauss, K. Suzuki, Hiroki Rokujo, N. G. Polukhina, Jiro Kawada, V. Tioukov, Marcos Dracos, C. Goellnitz, N. Di Marco, I. G. Park, K. Pretzl, J. Favier, B. D. Park, T. M. Roganova, N. Mauri, I. Shakiryanova, A. S. Malgin, E. Miyashita, Hiroaki Kawahara, J. Lenkeit, L. Chaussard, Timur Dzhatdoev, D. Di Ferdinando, A. M. Anokhina, S. Mikado, Pierre Vilain, D. Bender, Krešimir Jakovčić, P. Del Amo Sanchez, M. M. Chernyavsky, I. Rostovtseva, C. Gustavino, S. Ogawa, S. Tufanli, F. Grianti, N. I. Starkov, J. Goldberg, Osamu Sato, Adele Lauria, H. Ishida, Chiara Sirignano, Nicola D'Ambrosio, Tatsuhiro Naka, Antonio Ereditato, P. Monacelli, A. Sheshukov, Caren Hagner, M. Yoshimoto, A. B. Aleksandrov, L. Consiglio, F. Terranova, Murat Guler, Kimio Niwa, T. V. Shchedrina, Amina Zghiche, Y. A. Gornushkin, T. Asada, Utku Kose, T. Shiraishi, Maximiliano Sioli, E. Medinaceli, A. Ben Dhahbi, M. S. Vladimirov, Y. Nakatsuka, M. Tenti, Tomoko Ariga, M. De Serio, Taishi Katsuragawa, Masahiro Komatsu, M. Kamiscioglu, G. Brunetti, G. Sirri, Cécile Jollet, Artem Chukanov, H. Shibuya, L. Votano, Yu. Zaitsev, Nobuko Kitagawa, Torben Ferber, P. Migliozzi, Motoaki Miyanishi, R. A. Fini, S. M. Stellacci, P. F. Loverre, C. Pistillo, Seok Kim, M. Pozzato, C. S. Yoon, Maria Cristina Montesi, G. Ferone, D. A. Podgrudkov, S. Dmitrievski, and G. Grella
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Direct observation, Neutrino beam, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Neutrino oscillation, Charged current, Lepton
Abstract: The OPERA experiment is designed to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations in appearance mode i.e. through the direct observation of the $\tau$ lepton in $\nu_{\tau}$ charged current interactions. The experiment has taken data for five years, since 2008, with the CERN Neutrino to Gran Sasso beam. Previously, two $\nu_{\tau}$ candidates with a $\tau$ decaying into hadrons were observed in a sub-sample of data of the 2008-2011 runs. Here we report the observation of a third $\nu_\tau$ candidate in the $\tau^-\to\mu^-$ decay channel coming from the analysis of a sub-sample of the 2012 run. Taking into account the estimated background, the absence of $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillations is excluded at the 3.4 $\sigma$ level.
Published: 2014

40. Search for Neutrino Oscillations in Appearance Mode with the OPERA Experiment

Author: Timur Dzhatdoev and V. L. Troshina
Subjects: Particle physics, Astrophysics and Astronomy, Physics - Instrumentation and Detectors, Data simulation, FOS: Physical sciences, High Energy Physics - Experiment, MiniBooNE, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Mixing (mathematics), Detectors and Experimental Techniques, Neutrino oscillation, physics.ins-det, Particle Physics - Phenomenology, Physics, astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), Oscillation, hep-ex, High Energy Physics::Phenomenology, Mode (statistics), hep-ph, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Phenomenology, High Energy Physics::Experiment, Anomaly (physics), Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Particle Physics - Experiment
Abstract: The present paper highlights the data analysis status of the OPERA experiment. The experiment was designed to perform the neutrino interactions analysis on event-by-event basis, and optimized to search for $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillation in appearance mode, also allowing to perform a $\nu_{e}$ appearance search. We review the data simulation and the analysis chains implemented to search for $\nu_{\tau}$ interactions. The main kinematical parameters sensitive to the neutrino flavor are discussed, the uncertainties of the event parameter estimation are reviewed, and the main sources of background for the $\nu_{\mu} \rightarrow \nu_{\tau}$ oscillation search are examined. The topologies of the two first $\nu_{\tau}$ candidate events are presented. Finally, we review the status of the $\nu_{e}$ appearance search and present the constraints set by the OPERA experiment on the mixing angle $\theta_{13}$ and on the LSND/MiniBooNE anomaly., Comment: Mini-review of the OPERA experiment analysis status (October 2013), 9 pages, 5 figures, to appear in Proc. HEPFT-2013
Published: 2014
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41. Observation of tau neutrino appearance in the CNGS beam with the OPERA experiment

Author: L. Votano, Maximiliano Sioli, M. Nakamura, A. Longhin, Björn Wonsak, S. M. Stellacci, M. T. Muciaccia, A. Di Crescenzo, N. Di Marco, A. Schembri, D. A. Podgrudkov, Y. Nakatsuka, A.G. Olshevsky, J. L. Vuilleumier, M. Kamiscioglu, T. Matsuo, A. M. Anokhina, S. Dmitrievski, M. Tenti, A. B. Aleksandrov, C. Kamiscioglu, A. Meregaglia, R. Brugnera, G. Grella, Tomoko Ariga, M. De Serio, Nobuko Kitagawa, A. Sheshukov, I. Kreslo, Chiara Sirignano, Taishi Katsuragawa, P. F. Loverre, C. Pistillo, B. Klicek, Giuliana Galati, J. Lenkeit, Motoaki Miyanishi, M. Malenica, L. Pasqualini, L. Patrizii, B. Hosseini, G. Mandrioli, M. M. Chernyavsky, Y. A. Gornushkin, R. A. Fini, E. Medinaceli, A. S. Malgin, S. Dusini, F. Pupilli, T. Asada, M. Pozzato, C. Jollet, M. Spinetti, G. Shoziyoev, S. Ogawa, Nicola D'Ambrosio, Hiroaki Kawahara, M. S. Vladimirov, L. Stanco, Ante Ljubičić, Tatsuhiro Naka, G. Sirri, H. Shibuya, Alessandro Pastore, B. Buttne, Alessandro Paoloni, D. Di Ferdinando, I. Yaguchi, Toshiyuki Nakano, Artem Chukanov, O. G. Ryazhskaya, S. Mikado, Natalia Polukhina, G. De Lellis, Mario Stipčević, M. Roda, B. D. Park, T. Omura, Pierre Vilain, C. S. Yoon, J. H. Kim, I. G. Park, Viktor Matveev, P. del Amo Sanchez, Katsumi Ishiguro, Maria Cristina Montesi, Utku Kose, Kunihiro Morishima, Antonio Ereditato, T. Fukuda, T. Shiraishi, H. Pessard, S. Zemskova, Satoru Takahashi, T. V. Shchedrina, Amina Zghiche, K. Kodama, Akitaka Ariga, Salvatore Buontempo, N. Agafonova, Shigeki Aoki, S. Tufanli, Gianfranca De Rosa, Naotaka Naganawa, Hiroki Rokujo, Masahiro Komatsu, C. Goellnitz, J. Ebert, I. Shakiryanova, A. Buonaura, K. Ozaki, A. Umemoto, A. Garfagnini, Timur Dzhatdoev, P. Strolin, Manuel Meyer, Shinhong Kim, A. Hollnagel, Caren Hagner, D. Duchesneau, Marcos Dracos, D. Bender, Krešimir Jakovčić, L. Consiglio, F. Terranova, Murat Guler, Kimio Niwa, Gaston Wilquet, H. Ishida, T. M. Roganova, N. Mauri, T. Hayakawa, S. Simone, P. Monacelli, M. Yoshimoto, C. Gustavino, N. I. Starkov, J. Goldberg, Osamu Sato, Adele Lauria, Cristiano Bozza, N. M. Okateva, T. Hara, A. Bertolin, G. Giacomelli, Jiro Kawada, V. Tioukov, Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Asada, T, Bender, D, Bertolin, A, 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, Del Amo Sanchez, P, 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, Fukuda, T, Galati, G, Garfagnini, A, Giacomelli, G, Goellnitz, C, Goldberg, J, Gornushkin, Y, Grella, G, Guler, M, Gustavino, C, Hagner, C, Hara, T, Hayakawa, T, Hollnagel, A, Hosseini, B, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Katsuragawa, T, Kawada, J, Kawahara, H, Kim, J, Kim, S, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Lauria, A, Lenkeit, J, Ljubicic, A, Longhin, A, Loverre, P, Malenica, M, Malgin, A, Mandrioli, G, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meregaglia, A, Meyer, M, Mikado, S, Miyanishi, M, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nakatsuka, Y, Niwa, K, Ogawa, S, Okateva, N, Olshevsky, A, Omura, T, Ozaki, K, Paoloni, A, Park, B, Park, I, 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, Shakiryanova, 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, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Umemoto, A, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, Yaguchi, I, Yoshimoto, M, Zemskova, S, Zghiche, A, N., Agafonova, Aleksandrov, A., A., Anokhina, S., Aoki, A., Ariga, T., Ariga, T., Asada, D., Bender, A., Bertolin, C., Bozza, R., Brugnera, Buonaura, Annarita, S., Buontempo, B., Buttner, M., Chernyavsky, A., Chukanov, L., Consiglio, N., D'Ambrosio, DE LELLIS, Giovanni, M., de Serio, P., Del Amo Sanchez, DI CRESCENZO, Antonia, D., Di Ferdinando, N., Di Marco, S., Dmitrievski, M., Draco, D., Duchesneau, S., Dusini, T., Dzhatdoev, J., Ebert, A., Ereditato, R. A., Fini, T., Fukuda, Galati, Giuliana, A., Garfagnini, G., Giacomelli, C., Goellnitz, J., Goldberg, Y., Gornushkin, G., Grella, M., Guler, C., Gustavino, C., Hagner, T., Hara, T., Hayakawa, A., Hollnagel, Hosseini, Behzad, H., Ishida, K., Ishiguro, K., Jakovcic, C., Jollet, C., Kamiscioglu, M., Kamiscioglu, T., Katsuragawa, J., Kawada, H., Kawahara, J. H., Kim, S. H., Kim, N., Kitagawa, B., Klicek, K., Kodama, M., Komatsu, U., Kose, I., Kreslo, Lauria, Adele, J., Lenkeit, A., Ljubicic, A., Longhin, P., Loverre, M., Malenica, A., Malgin, G., Mandrioli, T., Matsuo, V., Matveev, N., Mauri, E., Medinaceli, A., Meregaglia, M., Meyer, S., Mikado, M., Miyanishi, P., Monacelli, Montesi, MARIA CRISTINA, K., Morishima, M. T., Muciaccia, N., Naganawa, T., Naka, M., Nakamura, T., Nakano, Y., Nakatsuka, K., Niwa, S., Ogawa, N., Okateva, A., Olshevsky, T., Omura, K., Ozaki, A., Paoloni, B. D., Park, I. G., Park, L., Pasqualini, A., Pastore, L., Patrizii, H., Pessard, C., Pistillo, D., Podgrudkov, N., Polukhina, M., Pozzato, F., Pupilli, M., Roda, T., Roganova, H., Rokujo, G., Rosa, O., Ryazhskaya, O., Sato, A., Schembri, I., Shakiryanova, T., Shchedrina, A., Sheshukov, H., Shibuya, T., Shiraishi, G., Shoziyoev, S., Simone, M., Sioli, C., Sirignano, G., Sirri, M., Spinetti, L., Stanco, N., Starkov, S. M., Stellacci, M., Stipcevic, Strolin, PAOLO EMILIO, S., Takahashi, M., Tenti, F., Terranova, V., Tioukov, S., Tufanli, A., Umemoto, P., Vilain, M., Vladimirov, L., Votano, J. L., Vuilleumier, G., Wilquet, B., Wonsak, C. S., Yoon, I., Yaguchi, M., Yoshimoto, S., Zemskova, A., Zghiche, N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, T. Asada, D. Bender, A. Bertolin, C. Bozza, R. Brugnera, A. Buonaura, S. Buontempo, B. Buttner, M. Chernyavsky, A. Chukanov, L. Consiglio, N. D'Ambrosio, G. de Lelli, M. de Serio, P. Del Amo Sanchez, A. Di Crescenzo, D. Di Ferdinando, N. Di Marco, S. Dmitrievski, M. Draco, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, R. A. Fini, T. Fukuda, G. Galati, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, M. Guler, C. Gustavino, C. Hagner, T. Hara, T. Hayakawa, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, C. Kamiscioglu, M. Kamiscioglu, T. Katsuragawa, J. Kawada, H. Kawahara, J. H. Kim, S. H. Kim, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, M. Malenica, A. Malgin, G. Mandrioli, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, A. Meregaglia, M. Meyer, S. Mikado, M. Miyanishi, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, N. Naganawa, T. Naka, M. Nakamura, T. Nakano, Y. Nakatsuka, K. Niwa, S. Ogawa, N. Okateva, A. Olshevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, L. Pasqualini, A. Pastore, L. Patrizii, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, F. Pupilli, M. Roda, T. Roganova, H. Rokujo, G. Rosa, O. Ryazhskaya, O. Sato, A. Schembri, I. Shakiryanova, T. Shchedrina, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, P. Strolin, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, S. Tufanli, A. Umemoto, P. Vilain, M. Vladimirov, L. Votano, J. L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, I. Yaguchi, M. Yoshimoto, S. Zemskova, and A. Zghiche
Subjects: Particle physics, 530 Physics, Hadron, General Physics and Astronomy, 01 natural sciences, neutrino, Physics and Astronomy (all), opera, 0103 physical sciences, tau, 010306 general physics, NUCLEAR EMULSIONS, Charged current, Physics, Muon, 010308 nuclear & particles physics, NEUTRINO DETECTORS, appearance, oscillations, NEUTRINO MIXING, Neutrino masses, mixing, and oscillations, experiments using neutrino beams, Physique des particules élémentaires, High Energy Physics::Experiment, Beam (structure), Lepton
Abstract: The OPERA experiment is searching for νμ ν τ oscillations in appearance mode, i.e. via the direct detection of \tau leptons in \nu -\tau charged-current interactions. The evidence of \nu -\mu \rightarrow \nu -\tau appearance has been previously reported with three \nu -\tau candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth \nu -\tau candidate event, with the \tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analyzed events and the low background, \nu -\mu \rightarrow \nu -\tau oscillations are established with a significance of 4.2\sigma., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2014

42. Contemporary status of the OPERA experiment for detecting νμ → ντ oscillations in a νμ beam

Author: S. G. Dmitrievsky, A. M. Anokhina, V. G. Ryasny, V. A. Matveev, M. M. Chernyavsky, A. S. Malgin, O. G. Ryazhskaya, N. G. Polukhina, V. A. Tsarev, A.G. Olshevsky, N. Yu. Agafonova, M. S. Vladimirov, V. V. Boyarkin, S. G. Zemskova, R. I. Enikeev, Timur Dzhatdoev, V. I. Osedlo, T. M. Roganova, A. V. Bagulya, V. F. Yakushev, Artem Chukanov, P. A. Publichenko, V. I. Galkin, Yu. A. Gornushkin, N. I. Starkov, G. I. Orlova, G. P. Sazhina, and V. Nikitina
Subjects: Nuclear physics, Physics, Particle physics, Muon, Opera, Hadron, General Physics and Astronomy, Software upgrade, Neutrino, Beam (structure)
Abstract: The first results of the physical stage of the OPERA experiment in 2007, when observation of oscillations of gvμ into gvτ started, are discussed. Thirty eight events related to neutrino interactions in emulsion blocks (bricks) are found. The underground muon spectrum and the μ+/μ− ratio are obtained. The results of using detachable emulsion packs (changeable sheets) and accuracy of predictions of neutrino interaction vertices in emulsion layers are discussed. The results of the hardware and software upgrade of the automatic emulsion scanning system PAVIKOM are reported.
Published: 2009

43. Addendum: search for νμ → νe oscillations with the OPERA experiment in the CNGS beam

Author: E. Pennacchio, F. Grianti, T. Hara, T. Omura, R. A. Fini, K. Kodama, A. Bertolin, Nobuko Kitagawa, A. Minotti, Torben Ferber, P. Migliozzi, A. M. Anokhina, Chiara Sirignano, Utku Kose, T. Shiraishi, R. Brugnera, A. Garfagnini, F. Meisel, G. Giacomelli, Hiroki Rokujo, A. Olchevsky, Björn Wonsak, Pierre Vilain, P. F. Loverre, C. Pistillo, T. M. Roganova, M. Kamiscioglu, I. Kreslo, L. Patrizii, B. Hosseini, G. Mandrioli, S. Dusini, M. M. Chernyavsky, Simona Maria Stellacci, W. Schmidt-Parzefall, Ante Ljubičić, Yoshihiro Sato, N. Mauri, D. Autiero, S. Ogawa, P. Del Amo Sanchez, G. Sirri, O. G. Ryazhskaya, Alessandro Paoloni, D. Duchesneau, S. Tufanli, Artem Chukanov, I. Rostovtseva, C. Gustavino, A. Di Crescenzo, B. Buettner, K. Suzuki, M. T. Muciaccia, K. Hamada, C. Goellnitz, N. I. Starkov, F. Pupilli, K. Pretzl, J. Goldberg, Osamu Sato, J. L. Vuilleumier, J. Yoshida, M. Pozzato, S. Dmitrievsky, C. Kamiscioglu, Adele Lauria, G. Brunetti, K. Ozaki, Alessandro Pastore, B. D. Park, J. H. Kim, Y. Nakatsuka, L. Chaussard, M. Nakamura, M. Kimura, Cécile Jollet, V. A. Matveev, M. Tenti, Mario Stipčević, N. G. Polukhina, A. Badertscher, M. Hierholzer, N. Di Marco, A. Hollnagel, Toshiyuki Nakano, Katsumi Ishiguro, M. S. Vladimirov, Salvatore Buontempo, Tomoko Ariga, M. De Serio, G. De Lellis, L. Votano, P. Strolin, D. A. Podgrudkov, Shinhong Kim, P. Monacelli, H. Pessard, A. Longhin, L. Stanco, Marcos Dracos, F. Brunet, A. B. Aleksandrov, J. Marteau, R. Rescigno, Yu. Zaitsev, Cristiano Bozza, N. M. Okateva, A. S. Malgin, Jiro Kawada, V. Tioukov, A. Russo, André Rubbia, Kunihiro Morishima, Thomas Strauss, Carlo Mancini-Terracciano, M. Roda, G. Grella, T. Fukuda, Masahiro Komatsu, H. Shibuya, D. Di Ferdinando, A. M. Guler, Akitaka Ariga, A. Schembri, S. Mikado, M. Spinetti, H. Ishida, B. Klicek, N. Agafonova, Shigeki Aoki, Amina Zghiche, Maria Cristina Montesi, T. Matsuo, Y. A. Gornushkin, G. Shoziyoev, S. Zemskova, Satoru Takahashi, Anselmo Meregaglia, F. Juget, Caren Hagner, L. Consiglio, F. Terranova, Kimio Niwa, S. Simone, J. Ebert, Vitaliano Chiarella, Maximiliano Sioli, E. Medinaceli, I. Shakiryanova, J. Lenkeit, G. Rosa, Timur Dzhatdoev, Krešimir Jakovčić, I. G. Park, Dmitry V. Naumov, T. Schchedrina, A. Ben Dhahbi, Antonio Ereditato, A. Sheshukov, Nicola D'Ambrosio, C. S. Yoon, Gaston Wilquet, P. Tolun, Agafonova, N., Aleksandrov, A., Anokhina, A., Aoki, S., Ariga, A., Ariga, T., Autiero, D., Badertscher, A., Dhahbi, A.Ben, Bertolin, A., Bozza, C., Brugnera, R., Brunet, F., Brunetti, G., Buettner, B., Buontempo, S., Chaussard, L., Chernyavsky, M., Chiarella, V., Chukanov, A., Consiglio, L., D'Ambrosio, N., De Lellis, G., De Serio, M., del Amo Sanchez, P., Di Crescenzo, A., Di Ferdinando, D., Di Marco, N., Dmitrievsky, S., Dracos, M., Duchesneau, D., Dusini, S., Dzhatdoev, T., Ebert, J., Ereditato, A., Ferber, T., Fini, R.A., Fukuda, T., Garfagnini, A., Giacomelli, G., Goellnitz, C., Goldberg, J., Gornushkin, Y., Grella, G., Grianti, F., Guler, A.M., Gustavino, C., Hagner, C., Hamada, K., Hara, T., Hierholzer, M., Hollnagel, A., Hosseini, B., Ishida, H., Ishiguro, K., Jakovcic, K., Jollet, C., Juget, F., Kamiscioglu, C., Kamiscioglu, M., Kawada, J., Kim, J.H., Kim, S.H., Kimura, M., Kitagawa, N., Klicek, B., Kodama, K., Komatsu, M., Kose, U., Kreslo, I., Lauria, A., Lenkeit, J., Ljubicic, A., Longhin, A., Loverre, P., Malgin, A., Mancini-Terracciano, C., Mandrioli, G., Marteau, J., Matsuo, T., Matveev, V., Mauri, N., Medinaceli, E., Meisel, F.W., Meregaglia, A., Migliozzi, P., Mikado, S., Minotti, A., Monacelli, P., Montesi, M.C., Morishima, K., Muciaccia, M.T., Nakamura, M., Nakano, T., Nakatsuka, Y., Naumov, D., Niwa, K., Ogawa, S., Okateva, N., Olchevsky, A., Omura, T., Ozaki, K., Paoloni, A., Park, B.D., Park, I.G., Pastore, A., Patrizii, L., Pennacchio, E., Pessard, H., Pistillo, C., Podgrudkov, D., Polukhina, N., Pozzato, M., Pretzl, K., Pupilli, F., Rescigno, R., Roda, M., Roganova, T., Rokujo, H., Rosa, G., Rostovtseva, I., Rubbia, A., Russo, A., Ryazhskaya, O., Sato, O., Sato, Y., Schchedrina, T., Schembri, A., Schmidt-Parzefall, W., Shakiryanova, I., 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., Strauss, T., Strolin, P., Suzuki, K., Takahashi, S., Tenti, M., Terranova, F., Tioukov, V., Tolun, P., Tufanli, S., Vilain, P., Vladimirov, M., Votano, L., Vuilleumier, J.-L., Wilquet, G., Wonsak, B., Yoon, C.S., Yoshida, J., Zaitsev, Y., Zemskova, S., Zghiche, A., Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Autiero, D, Badertscher, A, Dhahbi, A, Bertolin, A, Bozza, C, Brugnera, R, Brunet, F, Brunetti, G, Buettner, B, Buontempo, S, Chaussard, L, Chernyavsky, M, Chiarella, V, Chukanov, A, Consiglio, L, D'Ambrosio, N, De Lellis, G, De Serio, M, del Amo Sanchez, P, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievsky, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Ereditato, A, Ferber, T, Fini, R, Fukuda, T, Garfagnini, A, Giacomelli, G, Goellnitz, C, Goldberg, J, Gornushkin, Y, Grella, G, Grianti, F, Guler, A, Gustavino, C, Hagner, C, Hamada, K, Hara, T, Hierholzer, M, Hollnagel, A, Hosseini, B, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Juget, F, Kamiscioglu, C, Kamiscioglu, M, Kawada, J, Kim, J, Kim, S, Kimura, M, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Lauria, A, Lenkeit, J, Ljubicic, A, Longhin, A, Loverre, P, Malgin, A, Mancini-Terracciano, C, Mandrioli, G, Marteau, J, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meisel, F, Meregaglia, A, Migliozzi, P, Mikado, S, Minotti, A, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, Nakamura, M, Nakano, T, Nakatsuka, Y, Naumov, D, Niwa, K, Ogawa, S, Okateva, N, Olchevsky, A, Omura, T, Ozaki, K, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pistillo, C, Podgrudkov, D, Polukhina, N, Pozzato, M, Pretzl, K, Pupilli, F, Rescigno, R, Roda, M, Roganova, T, Rokujo, H, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryazhskaya, O, Sato, O, Sato, Y, Schchedrina, T, Schembri, A, Schmidt-Parzefall, W, Shakiryanova, I, Sheshukov, A, Shibuya, H, Shiraishi, T, Shoziyoev, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Spinetti, M, Stanco, L, Starkov, N, Stellacci, S, Stipcevic, M, Strauss, T, Strolin, P, Suzuki, K, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tolun, P, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, Yoshida, J, Zaitsev, Y, Zemskova, S, and Zghiche, A
Subjects: Nuclear physics, Physics, MiniBooNE, Particle physics, Nuclear and High Energy Physics, 530 Physics, Oscillation, Opera, Underground laboratory, Addendum, Neutrino, Neutrino beam, Beam (structure)
Abstract: Journal of High Energy Physics, 2013 (7), ISSN:1126-6708, ISSN:1029-8479
Published: 2013

44. Search for nu(mu) -> nu(e) oscillations with the OPERA experiment in the CNGS beam

Author: Kimio Niwa, D. A. Podgrudkov, J. Goldberg, Osamu Sato, F. Brunet, L. Patrizii, Adele Lauria, W. Schmidt-Parzefall, André Rubbia, Pierre Vilain, E. Pennacchio, B. Hosseini, G. Mandrioli, S. Dusini, T. Hara, M. Roda, K. Pretzl, G. Shoziyoev, Vitaliano Chiarella, Alessandro Paoloni, Maximiliano Sioli, S. Dmitrievsky, A. Di Crescenzo, E. Medinaceli, T. Omura, G. Grella, Ante Ljubičić, Koichi Kodama, Amina Zghiche, L. Chaussard, J. Yoshida, L. Consiglio, J. L. Vuilleumier, M. Spinetti, Björn Wonsak, T. M. Roganova, Carlo Mancini-Terracciano, D. Autiero, A. Longhin, J. Marteau, K. Ozaki, A. Ben Dhahbi, Akitaka Ariga, N. Mauri, A. Garfagnini, Cristiano Bozza, N. M. Okateva, S. Zemskova, Satoru Takahashi, N. Agafonova, Shigeki Aoki, A. Badertscher, Utku Kose, Hiroki Rokujo, A. Bertolin, Thomas Strauss, F. Meisel, Caren Hagner, I. G. Park, K. Suzuki, Y. A. Gornushkin, H. Shibuya, Maria Cristina Montesi, P. F. Loverre, C. Pistillo, Simona Maria Stellacci, P. Strolin, Shinhong Kim, D. Duchesneau, V. Matveev, Alessandro Pastore, S. Simone, C. Kamiscioglu, A. Schembri, F. Terranova, R. Brugnera, T. Shiraishi, Gaston Wilquet, P. Tolun, M. Kamiscioglu, Marcos Dracos, A. M. Anokhina, Nobuko Kitagawa, A. Minotti, B. Buettner, A. Sheshukov, T. Matsuo, C. Goellnitz, O. G. Ryazhskaya, Anselmo Meregaglia, M. Pozzato, Torben Ferber, P. Migliozzi, L. Stanco, B. D. Park, Frédéric Juget, Mario Stipčević, A. Olchevsky, M. M. Chernyavsky, Antonio Russo, R. Rescigno, J. H. Kim, B. Klicek, H. Ishida, C. S. Yoon, S. Ogawa, Dmitry V. Naumov, S. Tufanli, Salvatore Buontempo, A. Hollnagel, I. Rostovtseva, C. Gustavino, P. Del Amo Sanchez, Katsumi Ishiguro, P. Monacelli, G. Brunetti, N. I. Starkov, R. A. Fini, Cécile Jollet, A. B. Aleksandrov, G. Giacomelli, H. Pessard, I. Shakiryanova, F. Pupilli, A. S. Malgin, L. Votano, J. Ebert, G. Rosa, Timur Dzhatdoev, M. S. Vladimirov, Yu. Zaitsev, M. Nakamura, Krešimir Jakovčić, M. Kimura, D. Di Ferdinando, K. Hamada, N. G. Polukhina, J. Lenkeit, S. Mikado, N. Di Marco, T. Schchedrina, Antonio Ereditato, I. Kreslo, T. Fukuda, Nicola D'Ambrosio, Jiro Kawada, V. Tioukov, F. Grianti, Chiara Sirignano, Masahiro Komatsu, G. Sirri, Artem Chukanov, Toshiyuki Nakano, G. De Lellis, Y. Nakatsuka, Kunihiro Morishima, M. Tenti, A. M. Guler, Tomoko Ariga, M. De Serio, Yoshihiro Sato, M. T. Muciaccia, M. Hierholzer, Agafonova, N, Aleksandrov, A, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Autiero, D, Badertscher, A, Dhahbi, A, Bertolin, A, Bozza, C, Brugnera, R, Brunet, F, Brunetti, G, Buettner, B, Buontempo, S, Chaussard, L, Chernyavsky, M, Chiarella, V, Chukanov, A, Consiglio, L, D’Ambrosio, N, De Lellis, G, De Serio, M, del Amo Sanchez, P, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievsky, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Ereditato, A, Ferber, T, Fini, R, Fukuda, T, Garfagnini, A, Giacomelli, G, Goellnitz, C, Goldberg, J, Gornushkin, Y, Grella, G, Grianti, F, Guler, A, Gustavino, C, Hagner, C, Hamada, K, Hara, T, Hierholzer, M, Hollnagel, A, Hosseini, B, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Juget, F, Kamiscioglu, C, Kamiscioglu, M, Kawada, J, Kim, J, Kim, S, Kimura, M, Kitagawa, N, Klicek, B, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Lauria, A, Lenkeit, J, Ljubicic, A, Longhin, A, Loverre, P, Malgin, A, Mancini Terracciano, C, Mandrioli, G, Marteau, J, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meisel, F, Meregaglia, A, Migliozzi, P, Mikado, S, Minotti, A, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, Nakamura, M, Nakano, T, Nakatsuka, Y, Naumov, D, Niwa, K, Ogawa, S, Okateva, N, Olchevsky, A, Omura, T, Ozaki, K, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pistillo, C, Podgrudkov, D, Polukhina, N, Pozzato, M, Pretzl, K, Pupilli, F, Rescigno, R, Roda, M, Roganova, T, Rokujo, H, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryazhskaya, O, Sato, O, Sato, Y, Schchedrina, T, Schembri, A, Schmidt Parzefall, W, Shakiryanova, I, Sheshukov, A, Shibuya, H, Shiraishi, T, Shoziyoev, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Spinetti, M, Stanco, L, Starkov, N, Stellacci, S, Stipcevic, M, Strauss, T, Strolin, P, Suzuki, K, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tolun, P, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, Yoshida, J, Zaitsev, Y, Zemskova, S, Zghiche, A, N., Agafonova, DE LELLIS, Giovanni, DI CRESCENZO, Antonia, Lauria, Adele, Montesi, MARIA CRISTINA, Hosseini, Behzad, N. Agafonova, A. Aleksandrov, A. Anokhina, S. Aoki, A. Ariga, T. Ariga, D. Autiero, A. Badertscher, A. Ben Dhahbi, A. Bertolin, C. Bozza, R. Brugnera, F. Brunet, G. Brunetti, B. Buettner, S. Buontempo, L. Chaussard, M. Chernyavsky, V. Chiarella, A. Chukanov, L. Consiglio, N. D’Ambrosio, G. Lelli, M. Serio, P. del Amo Sanchez, A. Crescenzo, D. Ferdinando, N. Marco, S. Dmitrievsky, M. Draco, D. Duchesneau, S. Dusini, T. Dzhatdoev, J. Ebert, A. Ereditato, T. Ferber, R. A. Fini, T. Fukuda, A. Garfagnini, G. Giacomelli, C. Goellnitz, J. Goldberg, Y. Gornushkin, G. Grella, F. Grianti, A. M. Guler, C. Gustavino, C. Hagner, K. Hamada, T. Hara, M. Hierholzer, A. Hollnagel, B. Hosseini, H. Ishida, K. Ishiguro, K. Jakovcic, C. Jollet, F. Juget, C. Kamiscioglu, M. Kamiscioglu, J. Kawada, J. H. Kim, S. H. Kim, M. Kimura, N. Kitagawa, B. Klicek, K. Kodama, M. Komatsu, U. Kose, I. Kreslo, A. Lauria, J. Lenkeit, A. Ljubicic, A. Longhin, P. Loverre, A. Malgin, C. Mancini-Terracciano, G. Mandrioli, J. Marteau, T. Matsuo, V. Matveev, N. Mauri, E. Medinaceli, F. W. Meisel, A. Meregaglia, P. Migliozzi, S. Mikado, A. Minotti, P. Monacelli, M. C. Montesi, K. Morishima, M. T. Muciaccia, M. Nakamura, T. Nakano, Y. Nakatsuka, D. Naumov, K. Niwa, S. Ogawa, N. Okateva, A. Olchevsky, T. Omura, K. Ozaki, A. Paoloni, B. D. Park, I. G. Park, A. Pastore, L. Patrizii, E. Pennacchio, H. Pessard, C. Pistillo, D. Podgrudkov, N. Polukhina, M. Pozzato, K. Pretzl, F. Pupilli, R. Rescigno, M. Roda, T. Roganova, H. Rokujo, G. Rosa, I. Rostovtseva, A. Rubbia, A. Russo, O. Ryazhskaya, O. Sato, Y. Sato, T. Schchedrina, A. Schembri, W. Schmidt-Parzefall, I. Shakiryanova, A. Sheshukov, H. Shibuya, T. Shiraishi, G. Shoziyoev, S. Simone, M. Sioli, C. Sirignano, G. Sirri, M. Spinetti, L. Stanco, N. Starkov, S. M. Stellacci, M. Stipcevic, T. Strau, P. Strolin, K. Suzuki, S. Takahashi, M. Tenti, F. Terranova, V. Tioukov, P. Tolun, S. Tufanli, P. Vilain, M. Vladimirov, L. Votano, J.-L. Vuilleumier, G. Wilquet, B. Wonsak, C. S. Yoon, J. Yoshida, Y. Zaitsev, S. Zemskova, and A. Zghiche
Subjects: Particle physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, 530 Physics, Opera, neutrino detectors and telescopes, neutrino oscillations, oscillation, Neutrino beam, 01 natural sciences, Nuclear physics, MiniBooNE, 0103 physical sciences, 010306 general physics, Neutrino oscillation, Neutrino Detectors and Telescopes, Oscillation, TAU LEPTON, Physics, 010308 nuclear & particles physics, ELEMENTARY PARTICLE PHYSICS, PARTICLE INTERACTION, NEUTRINO DETECTORS, Physique atomique et nucléaire, Oscillation, Neutrino Detectors and Telescopes, Underground laboratory, High Energy Physics::Experiment, Beam (structure)
Abstract: A first result of the search for νμ → νe oscillations in the OPERA experiment, located at the Gran Sasso Underground Laboratory, is presented. The experiment looked for the appearance of νe in the CNGS neutrino beam using the data collected in 2008 and 2009. Data are compatible with the non-oscillation hypothesis in the three-flavour mixing model. A further analysis of the same data constrains the non-standard oscillation parameters θnew and Δm new 2 suggested by the LSND and MiniBooNE experiments. For large Δ Δmnew 2 values (>0.1 eV 2), the OPERA 90% C.L. upper limit on sin2(2θ new) based on a Bayesian statistical method reaches the value 7.2 × 10-3. © 2013 SISSA., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2013

45. Status of the SPHERE experiment

Author: T. I. Sysoeva, R.A. Antonov, T. M. Roganova, S. P. Beschapov, N. N. Kabanova, Dmitry Chernov, M. Finger, V. I. Galkin, Michael Finger Jr, A. S. Petkun, Timur Dzhatdoev, S. B. Shaulov, D. A. Podgrudkov, and E. A. Bonvech
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), History, Photomultiplier, Physics - Instrumentation and Detectors, Spectrometer, business.industry, Detector, Curved mirror, FOS: Physical sciences, Cosmic ray, Instrumentation and Detectors (physics.ins-det), Radiation, Particle detector, Computer Science Applications, Education, Optics, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, business, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cherenkov radiation
Abstract: Here is presented the current state of the SPHERE-2 balloon-borne experiment. The detector is elevated up to 1 km above the snow surface and registers the reflected Vavilov-Cherenkov radiation from extensive air showers. This method has good sensitivity to the mass-composition of the primary cosmic rays due to its high resolution near the shower axis. The detector consists of a 1500 mm spherical mirror with a 109 PMT cluster in its focus. The electronics record a signal pulse profile in each PMT. In the last 2 years the detector was upgraded: time resolution of pulse registration was enhanced up to 12.5 ns, channel sensitivity was increased by a factor of 3, a new LED-based relative PMT calibration method was introduced, and new hardware and etc. was installed., Comment: 4 pages, 5 figures, Proc. 23rd European Cosmic Ray Symposium, to appear in J. Phys. Conf. Ser
Published: 2012
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46. Momentum measurement by the Multiple Coulomb Scattering method in the OPERA lead emulsion target

Author: Toshiyuki Nakano, G. De Lellis, M. Paniccia, Akitaka Ariga, Kunihiro Morishima, N. Agafonova, Shigeki Aoki, M. S. Vladimirov, K. Pretzl, Amina Zghiche, Mario Stipčević, B. D. Park, S. Zemskova, A. Di Crescenzo, O. Egorov, Satoru Takahashi, Ante Ljubičić, M. Nakamura, L. Chaussard, Yoshihiro Sato, M. T. Muciaccia, M. Hierholzer, C. Göllnitz, Alessandro Paoloni, C. S. Yoon, Antonio Ereditato, J. Yoshida, A. M. Guler, H. Schroeder, A. V. Bagulya, A. M. Anokhina, N. G. Polukhina, L. Stanco, S. Dmitrievski, Björn Wonsak, C. Sirignano, A. Trabelsi, U. Kose, M. Chernyavskiy, L. Patrizii, G. Mandrioli, H. Kubota, D. Autiero, Anselmo Meregaglia, N. Di Marco, B. Klicek, R. Rescigno, L. Scotto Lavina, S. Dusini, F. Dal Corso, F. Brunet, V. Tioukov, I. Rostovtseva, A. Badertscher, A. Longhin, N. I. Starkov, J. Marteau, G. Shoziyoev, A. Garfagnini, S. Ogawa, G. Grella, A. Bertolin, V. Pilipenko, Y. Nonoyama, Masahiro Komatsu, G. Romano, Y. A. Gornushkin, Koichi Kodama, R. Brugnera, E. Pennacchio, Naotaka Naganawa, A. Schembri, F. Meisel, R. Zimmermann, Cristiano Bozza, J. S. Song, T. Matsuo, J. Lenkeit, Maximiliano Sioli, M. Kimura, N. M. Okateva, P. F. Loverre, D. Duchesneau, André Rubbia, G. Giacomelli, Pierre Vilain, Caren Hagner, U. Moser, P. Strolin, Marcos Dracos, I. Kreslo, K Kazuyama, J. Goldberg, Osamu Sato, V. Nikitina, Alexander Olshevskiy, R. I. Enikeev, G. Rosa, Timur Dzhatdoev, M. Besnier, A. Ben Dhahbi, A. Russo, O. G. Ryazhskaya, Krešimir Jakovčić, F. Terranova, M. Tenti, F. Pupilli, I. G. Park, M. Spinetti, C. Pistillo, S. Tufanli, V. G. Ryasny, K. Hoshino, T. Strauss, Guillaume Lutter, K. Manai, Tomoko Ariga, M. De Serio, K. Hamada, Dmitry V. Naumov, Luigi Salvatore Esposito, A. Sheshukov, S. Miyamoto, M. Giorgini, A. Hollnagel, Seok Kim, M. Pozzato, Alessandra Pastore, I. Tezuka, V. F. Yakushev, T. Yoshioka, G. Sirri, M. Ieva, V. A. Matveev, Ivano Lippi, Artem Chukanov, J. Favier, L. A. Goncharova, O Altinok, T. Fukuda, J. L. Vuilleumier, P. Del Amo Sanchez, Kimio Niwa, A. Cazes, Gaston Wilquet, P. Tolun, S. Buontempo, J. Ebert, F. Di Capua, S. Simone, Hiroki Rokujo, G. Brunetti, Dmitry Golubkov, J. Knuesel, T. Tran, Nobuko Kitagawa, C. Gustavino, W. Schmidt-Parzefall, Torben Ferber, T. Hara, P. Migliozzi, F. Juget, H. Ishida, H. Pessard, F. Grianti, T. Brugière, R. A. Fini, V. Chiarella, A. S. Malgin, E. Medinaceli, P. Monacelli, A. B. Aleksandrov, D. Frekers, T. M. Roganova, N. Mauri, Y. Déclais, Nicola D'Ambrosio, Tatsuhiro Naka, L. Votano, D. Di Ferdinando, S. Mikado, Yu. Zaitsev, M. Kamiscioglu, C Lazzaro, Cécile Jollet, H. Shibuya, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), OPERA, N. AGAFONOVA, A. ALEKSANDROV, O. ALTINOK, A. ANOKHINA, S. AOKI, A. ARIGA, T. ARIGA, D. AUTIERO, A. BADERTSCHER, A. BAGULYA, A. BEN DHAHBI, A. BERTOLIN, M. BESNIER, C. BOZZA, T. BRUGIERE, R. BRUGNERA, F. BRUNET, G. BRUNETTI, S. BUONTEMPO, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKIY, V. CHIARELLA, A. CHUKANOV, N. D’AMBROSIO, F. DAL CORSO, G. DE LELLIS, P. DEL AMO SANCHEZ, Y. DECLAIS, M. DE SERIO, F. DI CAPUA, A. DI CRESCENZO, D. DI FERDINANDO, N. DI MARCO, S. DMITRIEVSKI, M. DRACOS, D. DUCHESNEAU, S. DUSINI, T. DZHATDOEV, J. EBERT, O. EGOROV, R. ENIKEEV, A. EREDITATO, L. S. ESPOSITO, J. FAVIER, T. FERBER, R. A. FINI, D. FREKERS, T. FUKUDA, A. GARFAGNINI, G. GIACOMELLI, M. GIORGINI, C. GOLLNITZ, J. GOLDBERG, D. GOLUBKOV, L. GONCHAROVA, Y. GORNUSHKIN, G. GRELLA, F. GRIANTI, A. M. GULER, C. GUSTAVINO, C. HAGNER, K. HAMADA, T. HARA, M. HIERHOLZER, A. HOLLNAGEL, K. HOSHINO, M. IEVA, H. ISHIDA, K. JAKOVCIC, C. JOLLET, F. JUGET, M. KAMISCIOGLU, K. KAZUYAMA, S. H. KIM, M. KIMURA, N. KITAGAWA, B. KLICEK, J. KNUESEL, K. KODAMA, M. KOMATSU, U. KOSE, I. KRESLO, H. KUBOTA, C. LAZZARO, J. LENKEIT, I. LIPPI, A. LJUBICIC, A. LONGHIN, P. LOVERRE, G. LUTTER, A. MALGIN, G. MANDRIOLI, K. MANAI, J. MARTEAU, T. MATSUO, V. MATVEEV, N. MAURI, E. MEDINACELI, F. MEISEL, A. MEREGAGLIA, P. MIGLIOZZI, S. MIKADO, S. MIYAMOTO, P. MONACELLI, K. MORISHIMA, U. MOSER, M. T. MUCIACCIA, N. NAGANAWA, T. NAKA, M. NAKAMURA, T. NAKANO, D. NAUMOV, V. NIKITINA, K. NIWA, Y. NONOYAMA, S. OGAWA, N. OKATEVA, A. OLSHEVSKIY, M. PANICCIA, A. PAOLONI, B. D. PARK, I. G. PARK, A. PASTORE, L. PATRIZII, E. PENNACCHIO, H. PESSARD, K. PRETZL, V. PILIPENKO, C. PISTILLO, N. POLUKHINA, M. POZZATO, F. PUPILLI, R. RESCIGNO, T. ROGANOVA, H. ROKUJO, G. ROMANO, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, A. RUSSO, V. RYASNY, O. RYAZHSKAYA, O. SATO, Y. SATO, A. SCHEMBRI, W. SCHMIDT-PARZEFALL, H. SCHROEDER, L. SCOTTO LAVINA, A. SHESHUKOV, H. SHIBUYA, G. SHOZIYOEV, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J. S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, S. TAKAHASHI, M. TENTI, F. TERRANOVA, I. TEZUKA, V. TIOUKOV, P. TOLUN, A. TRABELSI, T. TRAN, S. TUFANLI, P. VILAIN, M. VLADIMIROV, L. VOTANO, J. L. VUILLEUMIER, G. WILQUET, B. WONSAK, V. YAKUSHEV, C. S. YOON, T. YOSHIOKA, J. YOSHIDA, Y. ZAITSEV, S. ZEMSKOVA, A. ZGHICHE, R. ZIMMERMANN, DIP. DI FISICA, DIPARTIMENTO DI FISICA E ASTRONOMIA 'AUGUSTO RIGHI', Facolta' di SCIENZE MATEMATICHE FISICHE e NATURALI, Da definire, AREA MIN. 02 - Scienze fisiche, Agafonova, N, Aleksandrov, A, Altinok, O, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Autiero, D, Badertscher, A, Bagulya, A, Ben Dhahbi, A, Bertolin, A, Besnier, M, Bozza, C, Brugière, T, Brugnera, R, Brunet, F, Brunetti, G, Buontempo, S, Cazes, A, Chaussard, L, Chernyavskiy, M, Chiarella, V, Chukanov, A, D'Ambrosio, N, Dal Corso, F, De Lellis, G, del Amo Sanchez, P, Déclais, Y, De Serio, M, Di Capua, F, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievski, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Egorov, O, Enikeev, R, Ereditato, A, S. Esposito, L, Favier, J, Ferber, T, A. Fini, R, Frekers, D, Fukuda, T, Garfagnini, A, Giacomelli, G, Giorgini, M, Göllnitz, C, Goldberg, J, Golubkov, D, Goncharova, L, Gornushkin, Y, Grella, G, Grianti, F, M. Guler, A, Gustavino, C, Hagner, C, Hamada, K, Hara, T, Hierholzer, M, Hollnagel, A, Hoshino, K, Ieva, M, Ishida, H, Jakovcic, K, Jollet, C, Juget, F, Kamiscioglu, M, Kazuyama, K, H. Kim, S, Kimura, M, Kitagawa, N, Klicek, B, Knuesel, J, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Kubota, H, Lazzaro, C, Lenkeit, J, Lippi, I, Ljubicic, A, Longhin, A, Loverre, P, Lutter, G, Malgin, A, Mandrioli, G, Manai, K, Marteau, J, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meisel, F, Meregaglia, A, Migliozzi, P, Mikado, S, Miyamoto, S, Monacelli, P, Morishima, K, Moser, U, T. Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Naumov, D, Nikitina, V, Niwa, K, Nonoyama, Y, Ogawa, S, Okateva, N, Olshevskiy, A, Paniccia, M, Paoloni, A, D. Park, B, G. Park, I, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pretzl, K, Pilipenko, V, Pistillo, C, Polukhina, N, Pozzato, M, Pupilli, F, Rescigno, R, Roganova, T, Rokujo, H, Romano, G, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryasny, V, Ryazhskaya, O, Sato, O, Sato, Y, Schembri, A, Schmidt Parzefall, W, Schroeder, H, Scotto Lavina, L, Sheshukov, A, Shibuya, H, Shoziyoev, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, S. Song, J, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Trabelsi, A, Tran, T, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, L. Vuilleumier, J, Wilquet, G, Wonsak, B, Yakushev, V, S. Yoon, C, Yoshioka, T, Yoshida, J, Zaitsev, Y, Zemskova, S, Zghiche, A, Zimmermann, R, DE LELLIS, Giovanni, DI CRESCENZO, Antonia, and Strolin, PAOLO EMILIO
Subjects: Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Monte Carlo method, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, High Energy Physics - Experiment, Momentum, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, NEUTRINO, NUCLEAR EMULSION, PARTICLE DETECTORS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear emulsion, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, Nuclear Experiment, Physics, Instrumentation et méthodes en physique, Muon, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), nuclear emulsions, Monte Carlo models, Charged particle, 3. Good health, Neutrino
Abstract: A new method of momentum measurement of charged particles through multiple Coulomb scattering (MCS) in the OPERA lead-emulsion target is presented. It is based on precise measurements of track angular deviations carried out thanks to the very high resolution of nuclear emulsions. The algorithm has been tested with Monte Carlo pions. The results are found to describe within the expected uncertainties the data obtained from test beams. We also present a comparison of muon momenta evaluated through MCS in the OPERA lead-emulsion target with those determined by the electronic detectors for neutrino-charged current interaction events. The two independent measurements agree within the experimental uncertainties, and the results validate the algorithm developed for the emulsion detector of OPERA. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft., 0, arXiv:1106.6211v1 [physics.ins-det], SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2012

47. Results on the primary CR spectrum and composition reconstructed with the SPHERE-2 detector

Author: N. V. Kabanova, M. H. Finger, R.A. Antonov, Dmitry Chernov, E. A. Bonvech, Timur Dzhatdoev, A. S. Petkun, T. I. Sysoeva, V. I. Galkin, S. B. Shaulov, T. M. Roganova, M. Finger, D. A. Podgrudkov, and S. P. Beschapov
Subjects: Physics, High Energy Astrophysical Phenomena (astro-ph.HE), History, Range (particle radiation), Spectrum (functional analysis), Detector, FOS: Physical sciences, Cosmic ray, Radiation, Snow, Computer Science Applications, Education, Computational physics, Distribution function, Primary (astronomy), Astrophysics - High Energy Astrophysical Phenomena
Abstract: First preliminary results of the balloon-borne experiment SPHERE-2 on the all-nuclei primary cosmic rays (PCR) spectrum and primary composition are presented. The primary spectrum in the energy range $10^{16}$--$5\cdot10^{17}$ eV was reconstructed using characteristics of Vavilov-Cherenkov radiation of extensive air showers (EAS), reflected from a snow surface. Several sources of systematic uncertainties of the spectrum were analysed. A method for separation of the primary nuclei' groups based on the lateral distribution function' (LDF) steepness parameter is presented. Preliminary estimate of the mean light nuclei' fraction $f_{30-150}$ at energies $3\cdot10^{16}$--$1.5\cdot10^{17}$ eV was performed and yielded $f_{30-150}$= (21$\pm$11)%., Comment: 4 pages, 2 figures, Proc. 23rd European Cosmic Ray Symposium, to appear in J. Phys. Conf. Ser
Published: 2012
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48. Study of neutrino interactions with the electronic detectors of the OPERA experiment

Author: A. S. Malgin, G. De Lellis, M. Paniccia, V. Nikitina, Kunihiro Morishima, D. Di Ferdinando, Maximiliano Sioli, Kimio Niwa, S. Mikado, T. Brugière, R. A. Fini, C. Pistillo, V. G. Ryasny, C. Göllnitz, Cristiano Bozza, N. M. Okateva, C. Gustavino, L. Stanco, A. Longhin, J. Marteau, K. Hamada, A. M. Guler, Caren Hagner, Alexander Bagulya, W. Schmidt-Parzefall, M. Pozzato, F. Brunet, M. Kimura, R. Rescigno, A. Schembri, F. Grianti, Antonio Ereditato, E. Medinaceli, T. Matsuo, H. Pessard, Ante Ljubičić, F. Terranova, S. Zemskova, Alessandro Paoloni, Naotaka Naganawa, André Rubbia, P. Strolin, S. Simone, L. Votano, J. Goldberg, Osamu Sato, Marcos Dracos, O. Egorov, Nobuko Kitagawa, Björn Wonsak, D. Autiero, Satoru Takahashi, S. Tufanli, F. Dal Corso, T. Strauss, T. Yoshioka, Chiara Sirignano, J. Favier, K. Pretzl, S. Dmitrievski, Hiroki Rokujo, Torben Ferber, A. Sheshukov, B. D. Park, Yoshihiro Sato, M. Spinetti, Viktor Matveev, M. Chernyavskiy, Yu. Zaitsev, Gianfranca De Rosa, Akitaka Ariga, L. Chaussard, M. T. Muciaccia, Y. A. Gornushkin, N. Agafonova, A. M. Anokhina, R. Brugnera, M. Ieva, G. Grella, T. Fukuda, F. Juget, Luigi Salvatore Esposito, J. Lenkeit, Nicola D'Ambrosio, Shigeki Aoki, Masahiro Komatsu, M. Giorgini, P. Migliozzi, Ivano Lippi, Tatsuhiro Naka, G. Brunetti, J. L. Vuilleumier, H. Kubota, Anselmo Meregaglia, M. Hierholzer, Dmitry Golubkov, A Olchevskiy, I. Tezuka, H. Schroeder, A. Bertolin, Pierre Vilain, V. F. Yakushev, H. Ishida, A. Cazes, G Shoziyeov, J. Knuesel, S H Kim, K Kazuyama, Amina Zghiche, C. S. Yoon, B. Klicek, U. Kose, H. Shibuya, S. Ogawa, S. Buontempo, J. Ebert, F. Di Capua, G. Sirri, I. Rostovtseva, Artem Chukanov, R. I. Enikeev, Timur Dzhatdoev, T. Tran, J. S. Song, M. Kamiscioglu, Krešimir Jakovčić, R. Zimmermann, Koichi Kodama, N. I. Starkov, Gaston Wilquet, P. Tolun, A. Hollnagel, E. Pennacchio, O Altinok, O. G. Ryazhskaya, I. G. Park, A. Garfagnini, L. A. Goncharova, F. Meisel, A Bendhahbi, L. Scotto Lavina, Dmitry V. Naumov, D. Duchesneau, C Lazzaro, Cécile Jollet, G. Giacomelli, M. S. Vladimirov, Alessandro Pastore, G. Romano, F. Pupilli, Mario Stipčević, P. F. Loverre, I. Kreslo, M. Tenti, Tomoko Ariga, M. De Serio, S. Miyamoto, M. Nakamura, N. G. Polukhina, A. Trabelsi, K Mannai, N. Di Marco, V. Tioukov, A. Di Crescenzo, J. Yoshida, T. M. Roganova, A. Badertscher, N. Mauri, U. Moser, Y. Déclais, A. Russo, Guillaume Lutter, P. Del Amo Sanchez, T. Hara, V. Chiarella, P. Monacelli, A. B. Aleksandrov, D. Frekers, V. Pilipenko, Y. Nonoyama, L. Patrizii, G. Mandrioli, S. Dusini, K. Hoshino, Toshiyuki Nakano, Agafonova, N, Aleksandrov, A, Altinok, O, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Autiero, D, Badertscher, A, Bagulya, A, Bendhahbi, A, Bertolin, A, Bozza, C, Brugière, T, Brugnera, R, Brunet, F, Brunetti, G, Buontempo, S, Cazes, A, Chaussard, L, Chernyavskiy, M, Chiarella, V, Chukanov, A, D'Ambrosio, N, Dal Corso, F, De Lellis, G, Del Amo Sanchez, P, Déclais, Y, De Serio, M, Di Capua, F, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievski, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Egorov, O, Enikeev, R, Ereditato, A, Esposito, L, Favier, J, Ferber, T, Fini, R, Frekers, D, Fukuda, T, Garfagnini, A, Giacomelli, G, Giorgini, M, Göllnitz, C, Goldberg, J, Golubkov, D, Goncharova, L, Gornushkin, Y, Grella, G, Grianti, F, Guler, A, Gustavino, C, Hagner, C, Hamada, K, Hara, T, Hierholzer, M, Hollnagel, A, Hoshino, K, Ieva, M, Ishida, H, Jakovcic, K, Jollet, C, Juget, F, Kamiscioglu, M, Kazuyama, K, Kim, S, Kimura, M, Kitagawa, N, Klicek, B, Knuesel, J, Kodama, K, Komatsu, M, Kose, U, Kreslo, I, Kubota, H, Lazzaro, C, Lenkeit, J, Lippi, I, Ljubicic, A, Longhin, A, Loverre, P, Lutter, G, Malgin, A, Mandrioli, G, Mannai, K, Marteau, J, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meisel, F, Meregaglia, A, Migliozzi, P, Mikado, S, Miyamoto, S, Monacelli, P, Morishima, K, Moser, U, Muciaccia, M, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Naumov, D, Nikitina, V, Niwa, K, Nonoyama, Y, Ogawa, S, Okateva, N, Olchevskiy, A, Paniccia, M, Paoloni, A, Park, B, Park, I, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pretzl, K, Pilipenko, V, Pistillo, C, Polukhina, N, Pozzato, M, Pupilli, F, Rescigno, R, Roganova, T, Rokujo, H, Romano, G, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryasny, V, Ryazhskaya, O, Sato, O, Sato, Y, Schembri, A, Schmidt Parzefall, W, Schroeder, H, Scotto Lavina, L, Sheshukov, A, Shibuya, H, Shoziyeov, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J, Spinetti, M, Stanco, L, Starkov, N, Stipcevic, M, Strauss, T, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Trabelsi, A, Tran, T, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yakushev, V, Yoon, C, Yoshioka, T, Yoshida, J, Zaitsev, Y, Zemskova, S, Zghiche, A, Zimmermann, R, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), OPERA, DE LELLIS, Giovanni, DI CRESCENZO, Antonia, Strolin, PAOLO EMILIO, N. AGAFONOVA, A. ALEKSANDROV, O. ALTINOK, A. ANOKHINA, S. AOKI, A. ARIGA, T. ARIGA, D. AUTIERO, A. BADERTSCHER, A. BAGULYA, A. BENDHAHBI, A. BERTOLIN, C. BOZZA, T. BRUGIÈRE, R. BRUGNERA, F. BRUNET, G. BRUNETTI, S. BUONTEMPO, A. CAZES, L. CHAUSSARD, M. CHERNYAVSKIY, V. CHIARELLA, A. CHUKANOV, N. D’AMBROSIO, F. DAL CORSO, G. DE LELLIS, P. DEL AMO SANCHEZ, Y. DÉCLAIS, M. DE SERIO, F. DI CAPUA, A. DI CRESCENZO, D. DI FERDINANDO, N. DI MARCO, S. DMITRIEVSKI, M. DRACOS, D. DUCHESNEAU, S. DUSINI, T. DZHATDOEV, J. EBERT, O. EGOROV, R. ENIKEEV, A. EREDITATO, L. S. ESPOSITO, J. FAVIER, T. FERBER, R. A. FINI, D. FREKERS, T. FUKUDA, A. GARFAGNINI, G. GIACOMELLI, M. GIORGINI, C. GÖLLNITZ, J. GOLDBERG, D. GOLUBKOV, L. GONCHAROVA, Y. GORNUSHKIN, G. GRELLA, F. GRIANTI, A. M. GULER, C. GUSTAVINO, C. HAGNER, K. HAMADA, T. HARA, M. HIERHOLZER, A. HOLLNAGEL, K. HOSHINO, M. IEVA, H. ISHIDA, K. JAKOVCIC, C. JOLLET, F. JUGET, M. KAMISCIOGLU, K. KAZUYAMA, S. H. KIM, M. KIMURA, N. KITAGAWA, B. KLICEK, J. KNUESEL, K. KODAMA, M. KOMATSU, U. KOSE, I. KRESLO, H. KUBOTA, C. LAZZARO, J. LENKEIT, I. LIPPI, A. LJUBICIC, A. LONGHIN, P. LOVERRE, G. LUTTER, A. MALGIN, G. MANDRIOLI, K. MANNAI, J. MARTEAU, T. MATSUO, V. MATVEEV, N. MAURI, E. MEDINACELI, F. MEISEL, A. MEREGAGLIA, P. MIGLIOZZI, S. MIKADO, S. MIYAMOTO, P. MONACELLI, K. MORISHIMA, U. MOSER, M. T. MUCIACCIA, N. NAGANAWA, T. NAKA, M. NAKAMURA, T. NAKANO, D. NAUMOV, V. NIKITINA, K. NIWA, Y. NONOYAMA, S. OGAWA, N. OKATEVA, A. OLCHEVSKIY, M. PANICCIA, A. PAOLONI, B. D. PARK, I. G. PARK, A. PASTORE, L. PATRIZII, E. PENNACCHIO, H. PESSARD, K. PRETZL, V. PILIPENKO, C. PISTILLO, N. POLUKHINA, M. POZZATO, F. PUPILLI, R. RESCIGNO, T. ROGANOVA, H. ROKUJO, G. ROMANO, G. ROSA, I. ROSTOVTSEVA, A. RUBBIA, A. RUSSO, V. RYASNY, O. RYAZHSKAYA, O. SATO, Y. SATO, A. SCHEMBRI, W. SCHMIDT-PARZEFALL, H. SCHROEDER, L. SCOTTO LAVINA, A. SHESHUKOV, H. SHIBUYA, G. SHOZIYEOV, S. SIMONE, M. SIOLI, C. SIRIGNANO, G. SIRRI, J. S. SONG, M. SPINETTI, L. STANCO, N. STARKOV, M. STIPCEVIC, T. STRAUSS, P. STROLIN, S. TAKAHASHI, M. TENTI, F. TERRANOVA, I. TEZUKA, V. TIOUKOV, P. TOLUN, A. TRABELSI, T. TRAN, S. TUFANLI, P. VILAIN, M. VLADIMIROV, L. VOTANO, J. L. VUILLEUMIER, G. WILQUET, B. WONSAK, V. YAKUSHEV, C. S. YOON, T. YOSHIOKA, J. YOSHIDA, Y. ZAITSEV, S. ZEMSKOVA, A. ZGHICHE, R. ZIMMERMANN, del Amo Sanchez, P, DI CAPUA, Francesco, Esposito, L. S, Fini, R. A, Guler, A. M, Kim, S. H, Muciaccia, M. T, Park, B. D, Park, I. G, Song, J. S, Vuilleumier, J. L, Yoon, C. S, and Zimmermann, R.
Subjects: Physics::Instrumentation and Detectors, Resistive plate, Photographic emulsions Engineering main heading: Experiments, Monte Carlo method, Muon track, General Physics and Astronomy, INTERACTIONS, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Neutral current, Neutrino interaction, High Energy Physics - Experiment (hep-ex), neutrino, CNGS, Neutrino beam, ELECTRONIC DETECORS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, Charged current, Physics, Large Hadron Collider, Luminosity (scattering theory), electronic detector, neutrino interactions, OPERA, Energy range, Gas chamber, Monte Carlo Simulation, Computer simulation, Physique des particules élémentaires, Neutrino, Particle Physics - Experiment, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Scintillator, Nuclear emulsion, Nuclear physics, Physics and Astronomy (all), cngs, opera, Scintillator strips Engineering controlled terms: Charged particle, Muon spectrometer, 0103 physical sciences, 010306 general physics, Momentum distribution, Muon, 010308 nuclear & particles physics, Emergency room, Hybrid technology, Calorimetric measurement, Physics::Accelerator Physics, High Energy Physics::Experiment, hybrid detectors, particle tracking detectors, electronic detectors, scintillators, magnetic spectrometers, Drift tube
Abstract: The OPERA experiment is based on a hybrid technology combining electronic detectors (EDs) and nuclear emulsions. OPERA collected muon-neutrino interactions during the 2008 and 2009 physics runs of the CNGS neutrino beam, produced at CERN with an energy range of about 5-35 GeV. A total of 5.3 × 1019 protons on target equivalent luminosity have been analysed with the OPERA EDs: scintillator strips target trackers and magnetic muon spectrometers equipped with resistive plate gas chambers and drift tubes, allowing a detailed reconstruction of muon-neutrino interactions. Charged current (CC) and neutral current (NC) interactions are identified, using the measurements in the EDs, and the NC/CC ratio is computed. The momentum distribution and the charge of the muon tracks produced in CC interactions are analysed. Calorimetric measurements of the visible energy are performed for both the CC and NC samples. For CC events, the Bjorken-y distribution and the hadronic shower profile are computed. The results are compared with a detailed Monte Carlo simulation of the response of EDs. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2011

49. Discovery of t Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Author: A. Longhin, A. M. Anokhina, R. Brugnera, Toshiyuki Nakano, G. De Lellis, G. Sirri, Ante Ljubičić, Artem Chukanov, A. Sheshukov, M. M. Chernyavsky, Masahiro Komatsu, A. Schembri, S. Ogawa, S. Tufanli, Y. Nakatsuka, T. Matsuo, M. Tenti, F. Pupilli, A. Buonaura, Kunihiro Morishima, P. Monacelli, M. Spinetti, G. Shoziyoev, Tomoko Ariga, M. De Serio, F. Laudisio, G. Galati, Naotaka Naganawa, A. B. Aleksandrov, A. Di Crescenzo, H. Shibuya, A. Garfagnini, A. M. Guler, B. Klicek, M. Roda, Alessandra Pastore, P. F. Loverre, Alessandro Paoloni, M. Kamiscioglu, C. Jollet, S. Simone, F. Mizutani, C. S. Yoon, Björn Wonsak, H. Hayakawa, A. S. Malgin, B. Büttner, I. Kreslo, N. G. Polukhina, I. Shakirianova, D. Duchesneau, Caren Hagner, Motoaki Miyanishi, Maria Cristina Montesi, C. Pistillo, I. G. Park, L. Consiglio, F. Terranova, Utku Kose, O. G. Ryazhskaya, M. T. Muciaccia, T. M. Roganova, Koichi Kodama, R. A. Fini, Seok Kim, N. Di Marco, N. Mauri, T. Shiraishi, M. Pozzato, W. Schmidt-Parzefall, F. Fornari, P. Strolin, T. Fukuda, I. Bodnarchuk, M. Malenica, Mario Stipčević, Katsumi Ishiguro, P. del Amo Sanchez, L. Pasqualini, D. Di Ferdinando, Takashi Matsushita, Kimio Niwa, L. Patrizii, B. Hosseini, G. Mandrioli, C. Kamiscioglu, Maximiliano Sioli, T. Shchedrina, D. A. Podgrudkov, S. Mikado, A. Olchevsky, E. Medinaceli, B. D. Park, S. Dusini, S. Zemskova, Akitaka Ariga, S. Dmitrievski, Satoru Takahashi, L. Votano, A. Hollnagel, N. Agafonova, M. Dracos, Shigeki Aoki, Hiroki Rokujo, G. Grella, Nobuko Kitagawa, J. L. Vuilleumier, V. Matveev, Simona Maria Stellacci, K. Ozaki, Anselmo Meregaglia, S. Buontempo, J. Ebert, Y. A. Gornushkin, L. Stanco, Pierre Vilain, Chiara Sirignano, J. H. Kim, Nicola D'Ambrosio, H. Pessard, Mykhailo Vladymyrov, Tatsuhiro Naka, A. Sotnikov, Gaston Wilquet, Antonio Ereditato, G. Rosa, Timur Dzhatdoev, D. Bender, Krešimir Jakovčić, T. Omura, L. Paparella, Cristiano Bozza, J. Goldberg, Osamu Sato, Adele Lauria, T. Hara, C. Gustavino, N. I. Starkov, V. Tioukov, A. Bertolin, Mitsuhiro Nakamura, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), OPERA, N., Agafonova, Aleksandrov, A., A., Anokhina, S., Aoki, A., Ariga, T., Ariga, D., Bender, A., Bertolin, I., Bodnarchuk, C., Bozza, R., Brugnera, Buonaura, Annarita, S., Buontempo, B., Büttner, M., Chernyavsky, A., Chukanov, L., Consiglio, N., D’Ambrosio, DE LELLIS, Giovanni, M., De Serio, P., Del Amo Sanchez, DI CRESCENZO, Antonia, D., Di Ferdinando, N., Di Marco, S., Dmitrievski, M., Draco, D., Duchesneau, S., Dusini, T., Dzhatdoev, J., Ebert, A., Ereditato, Fini, R. . A., F., Fornari, T., Fukuda, Galati, Giuliana, A., Garfagnini, J., Goldberg, Y., Gornushkin, G., Grella, Guler, A. . M., C., Gustavino, C., Hagner, T., Hara, H., Hayakawa, A., Hollnagel, B., Hosseini, K., Ishiguro, K., Jakovcic, C., Jollet, C., Kamiscioglu, M., Kamiscioglu, Kim, J. . H., Kim, S. . H., N., Kitagawa, B., Klicek, K., Kodama, M., Komatsu, U., Kose, I., Kreslo, F., Laudisio, Lauria, Adele, A., Ljubicic, A., Longhin, Loverre, P. . F., A., Malgin, M., Malenica, G., Mandrioli, T., Matsuo, T., Matsushita, V., Matveev, N., Mauri, E., Medinaceli, A., Meregaglia, S., Mikado, M., Miyanishi, F., Mizutani, P., Monacelli, Montesi, MARIA CRISTINA, K., Morishima, Muciaccia, M. . T., N., Naganawa, T., Naka, M., Nakamura, T., Nakano, Y., Nakatsuka, K., Niwa, S., Ogawa, A., Olchevsky, T., Omura, K., Ozaki, A., Paoloni, L., Paparella, Park, B. . D., Park, I. . G., L., Pasqualini, A., Pastore, L., Patrizii, H., Pessard, C., Pistillo, D., Podgrudkov, N., Polukhina, M., Pozzato, F., Pupilli, M., Roda, T., Roganova, H., Rokujo, G., Rosa, O., Ryazhskaya, O., Sato, A., Schembri, W., Schmidt Parzefall, I., Shakirianova, T., Shchedrina, A., Sheshukov, H., Shibuya, T., Shiraishi, G., Shoziyoev, S., Simone, M., Sioli, C., Sirignano, G., Sirri, A., Sotnikov, M., Spinetti, L., Stanco, N., Starkov, Stellacci, S. . M., M., Stipcevic, P., Strolin, S., Takahashi, M., Tenti, F., Terranova, V., Tioukov, S., Tufanli, P., Vilain, M., Vladymyrov, L., Votano, Vuilleumier, J. . L., G., Wilquet, B., Wonsak, Yoon, C. . S., S., Zemskova, Agafonova, N, 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., Del Amo Sanchez, P., 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., Zemskova, S., 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, Del Amo Sanchez, P, 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, Fornari, F, Fukuda, T, Galati, G, Garfagnini, A, Goldberg, J, Gornushkin, Y, Grella, G, Guler, A, Gustavino, C, Hagner, C, Hara, T, Hayakawa, H, Hollnagel, A, Hosseini, B, Ishiguro, K, Jakovcic, K, Jollet, C, Kamiscioglu, C, Kamiscioglu, M, Kim, J, Kim, S, 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, Matsushita, T, Matveev, V, Mauri, N, Medinaceli, E, Meregaglia, A, Mikado, S, Miyanishi, M, Mizutani, F, Monacelli, P, Montesi, M, Morishima, K, Muciaccia, M, 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, Park, I, 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, Stipcevic, M, Strolin, P, Takahashi, S, Tenti, M, Terranova, F, Tioukov, V, Tufanli, S, Vilain, P, Vladymyrov, M, Votano, L, Vuilleumier, J, Wilquet, G, Wonsak, B, Yoon, C, and Zemskova, S
Subjects: Particle physics, Physics::Instrumentation and Detectors, General Physics and Astronomy, FOS: Physical sciences, CERN Neutrinos to Gran Sasso, Neutrino beam, Neutrino, OPERA, discovery, appearance, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, CNGS, Physics and Astronomy (all), High Energy Physics - Experiment (hep-ex), 0103 physical sciences, OPERA experiment, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], neutrino oscillation, tau, 010306 general physics, Neutrino oscillation, Charged current, Neutrino oscillations, Physics, 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
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

50. Search for $?_{µ} \to ?_{t}$ oscillation with the OPERA experiment in the CNGS beam

Author: M. Kamiscioglu, A. Hollnagel, C. Göllnitz, Hiroki Rokujo, R. I. Enikeev, G. Rosa, Timur Dzhatdoev, Y. Nonoyama, Alessandra Pastore, J. Ebert, F. Di Capua, A. Longhin, L. Stanco, Krešimir Jakovčić, Maximiliano Sioli, G. Brunetti, J. Marteau, Amina Zghiche, L. Patrizii, G. Mandrioli, K Kogiso, I. Tezuka, S. Dusini, K. Hoshino, A. Olshevsky, Luigi Salvatore Esposito, J. Knuesel, V. F. Yakushev, O. Palamara, C Lazzaro, L. A. Goncharova, T. Fukuda, R. Rescigno, A. Schembri, Björn Wonsak, G. Sirri, D. Autiero, Cécile Jollet, Nicola D'Ambrosio, Artem Chukanov, Tatsuhiro Naka, M. Nakamura, Dmitry Golubkov, U. Moser, J. Goldberg, Osamu Sato, P. F. Loverre, C. Pistillo, V. G. Ryasny, M. Giorgini, A. Ben Dhahbi, T. Matsuo, A. Russo, Vitaliano Chiarella, K. Pretzl, N. G. Polukhina, O. G. Ryazhskaya, O Altinok, W. Schmidt-Parzefall, M. S. Vladimirov, T. Hara, Guillaume Lutter, V. Nikitina, Pierre Vilain, M. Pozzato, H. Pessard, V. A. Matveev, G Shoziyoev, H. Shibuya, N. Di Marco, I. Kreslo, A. Garfagnini, A. Cazes, Y. Nakatsuka, T. Tran, L. Chaussard, F. Grianti, A. S. Malgin, R. Brugnera, A. M. Guler, S. Dmitrievski, K. Hamada, M. Tenti, F. Meisel, S. Simone, T. Yoshioka, M. Chernyavskiy, Caren Hagner, J. L. Vuilleumier, P. Del Amo Sanchez, J. Favier, T. Brugière, R. A. Fini, Cristiano Bozza, G. Romano, N. M. Okateva, G. Grella, A. Di Crescenzo, D. Duchesneau, F. Juget, L. Votano, J. Yoshida, K. Suzuki, Tomoko Ariga, M. De Serio, C. S. Yoon, Thomas Strauss, E. Medinaceli, S. Miyamoto, B D Park, Y. A. Gornushkin, M Stellacci, A. Badertscher, E. Pennacchio, Nobuko Kitagawa, Akitaka Ariga, F. Terranova, M. Kimura, F. Brunet, Yu. Zaitsev, H. Ishida, D. Di Ferdinando, Torben Ferber, P. Migliozzi, N. Agafonova, P. Monacelli, R. Zimmermann, P. Strolin, T. Omura, F. Pupilli, S. Mikado, Naotaka Naganawa, André Rubbia, Shigeki Aoki, B. Klicek, Mario Stipčević, I. Rostovtseva, L. Scotto Lavina, C. Gustavino, Marcos Dracos, A. M. Anokhina, Katsumi Ishiguro, N. I. Starkov, Utku Kose, A. Sheshukov, Yoshihiro Sato, Salvatore Buontempo, M. Spinetti, Masahiro Komatsu, M. T. Muciaccia, S. Ogawa, M. Hierholzer, Toshiyuki Nakano, S. Tufanli, Gaston Wilquet, M. Ieva, G. De Lellis, K. Kodama, P. Tolun, M. Paniccia, A. V. Bagulya, Ivano Lippi, Kunihiro Morishima, Kimio Niwa, S H Kim, S. Zemskova, O. Egorov, Satoru Takahashi, F. Dal Corso, Ante Ljubičić, Anselmo Meregaglia, Alessandro Paoloni, Antonio Ereditato, C. Sirignano, I. G. Park, Dmitry V. Naumov, J. Lenkeit, A. Bertolin, J. S. Song, G. Giacomelli, A. Trabelsi, K Mannai, V. Tioukov, A. B. Aleksandrov, D. Frekers, T. M. Roganova, N. Mauri, Y. Déclais, Agafonova, N, Aleksandrov, A, Altinok, O, Anokhina, A, Aoki, S, Ariga, A, Ariga, T, Autiero, D, Badertscher, A, Bagulya, A, Ben Dhahbi, A, Bertolin, A, Bozza, C, Brugière, T, Brugnera, R, Brunet, F, Brunetti, G, Buontempo, S, Cazes, A, Chaussard, L, Chernyavskiy, M, Chiarella, V, Chukanov, A, D'Ambrosio, N, Dal Corso, F, Déclais, Y, del Amo Sanchez, P, De Lellis, G, De Serio, M, DI CAPUA, Francesco, Di Crescenzo, A, Di Ferdinando, D, Di Marco, N, Dmitrievski, S, Dracos, M, Duchesneau, D, Dusini, S, Dzhatdoev, T, Ebert, J, Egorov, O, Enikeev, R, Ereditato, A, Esposito, L. S, Favier, J, Ferber, T, Fini, R. A, Frekers, D, Fukuda, T, Garfagnini, A, Giacomelli, G, Giorgini, M, Göllnitz, C, Goldberg, J, Golubkov, D, Goncharova, L, Gornushkin, Y, Grella, G, Grianti, F, Guler, A. M, Gustavino, C, Hagner, C, Hamada, K, Hara, T, Hierholzer, M, Hollnagel, A, Hoshino, K, Ieva, M, Ishida, H, Ishiguro, K, Jakovcic, K, Jollet, C, Juget, F, Kamiscioglu, M, Kim, S. H, Kimura, M, Kitagawa, N, Klicek, B, Knuesel, J, Kodama, K, Kogiso, K, Komatsu, M, Kose, U, Kreslo, I, Lazzaro, C, Lenkeit, J, Lippi, I, Ljubicic, A, Longhin, A, Loverre, P, Lutter, G, Malgin, A, Mandrioli, G, Mannai, K, Marteau, J, Matsuo, T, Matveev, V, Mauri, N, Medinaceli, E, Meisel, F, Meregaglia, A, Migliozzi, P, Mikado, S, Miyamoto, S, Monacelli, P, Morishima, K, Moser, U, Muciaccia, M. T, Naganawa, N, Naka, T, Nakamura, M, Nakano, T, Nakatsuka, Y, Naumov, D, Nikitina, V, Niwa, K, Nonoyama, Y, Ogawa, S, Okateva, N, Olshevsky, A, Omura, T, Palamara, O, Paniccia, M, Paoloni, A, Park, B. D, Park, I. G, Pastore, A, Patrizii, L, Pennacchio, E, Pessard, H, Pistillo, C, Polukhina, N, Pozzato, M, Pretzl, K, Pupilli, F, Rescigno, R, Roganova, T, Rokujo, H, Romano, G, Rosa, G, Rostovtseva, I, Rubbia, A, Russo, A, Ryasny, V, Ryazhskaya, O, Sato, O, Sato, Y, Schembri, A, Schmidt Parzefall, W, Scotto Lavina, L, Sheshukov, A, Shibuya, H, Shoziyoev, G, Simone, S, Sioli, M, Sirignano, C, Sirri, G, Song, J. S, Spinetti, M, Stanco, L, Starkov, N, Stellacci, M, Stipcevic, M, Strauss, T, Strolin, P, Suzuki, K, Takahashi, S, Tenti, M, Terranova, F, Tezuka, I, Tioukov, V, Tolun, P, Trabelsi, A, Tran, T, Tufanli, S, Vilain, P, Vladimirov, M, Votano, L, Vuilleumier, J. L, Wilquet, G, Wonsak, B, Yakushev, V, Yoon, C. S, Yoshida, J, Yoshioka, T, Zaitsev, Y, Zemskova, S, Zghiche, A, and Zimmermann, R.
Subjects: Particle physics, Charged current, Neutrino oscillation, Physics::Instrumentation and Detectors, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Nuclear physics, Experiment, Neutrino beam, Neutrino experiment, 0103 physical sciences, Nuclear emulsion, Nuclear Experiment, 010306 general physics, Physics, ICARUS, Large Hadron Collider, 010308 nuclear & particles physics, Monte Carlo Simulation, Monte Carlo methods Engineering main heading: Elementary particles, High energy, Electronic detector, Measurements of neutrino speed, High Energy Physics::Experiment, Neutrino, Statistical significance Engineering controlled terms: Emulsification, Event (particle physics)
Abstract: The OPERA neutrino experiment in the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in direct appearance mode in the vμ→ v τ channel, the v τ signature being the identification of the τ -lepton created in its charged current interaction. The hybrid apparatus consists of a large mass emulsion film/lead target complemented by electronic detectors. Placed in the LNGS, it is exposed to the high-energy long-baseline CERN Neutrino beam to Gran Sasso (CNGS) 730 km away from the neutrino source. The observation of a first v τ candidate event was reported in 2010. In this paper, we discuss the result of the analysis of the data taken during the first two years of operation (2008-2009) underlining the major improvements brought to the analysis chain and to the Monte Carlo simulations. The statistical significance of the one event observed so far is then evaluated to 95%.
Published: 2012
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