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9 results on '"R. Dvornický"'

1. High-Energy Neutrino Astronomy and the Baikal-GVD Neutrino Telescope

Author

A. D. Avrorin, A. V. Avrorin, V. M. Aynutdinov, R. Bannasch, Z. Bardáčová, I. A. Belolaptikov, V. Dik, V. B. Brudanin, N. M. Budnev, G. V. Domogatsky, A. A. Doroshenko, R. Dvornický, A. N. Dyachok, Zh.-A. M. Dzhilkibaev, E. Eckerová, T. V. Elzhov, L. Fajt, S. V. Fialkovski, A. R. Gafarov, K. V. Golubkov, N. S. Gorshkov, T. I. Gress, R. A. Ivanov, M. S. Katulin, K. G. Kebkal, O. G. Kebkal, E. V. Khramov, M. M. Kolbin, K. V. Konischev, K. A. Kopański, A. V. Korobchenko, A. P. Koshechkin, V. A. Kozhin, M. V. Kruglov, M. K. Kryukov, V. F. Kulepov, M. B. Milenin, R. R. Mirgazov, D. V. Naumov, V. Nazari, W. Noga, D. P. Petukhov, E. N. Pliskovsky, M. I. Rozanov, V. D. Rushay, E. V. Ryabov, G. B. Safronov, B. A. Shaybonov, M. D. Shelepov, F. Šimkovic, A. V. Skurikhin, A. G. Solovjev, M. N. Sorokovikov, I. Štekl, E. O. Sushenok, O. V. Suvorova, V. A. Tabolenko, B. A. Tarashansky, Y. V. Yablokova, S. Yakovlev, and D. N. Zaborov

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Nuclear and High Energy Physics, High energy, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Neutrino telescope, Astrophysics::Instrumentation and Methods for Astrophysics, Northern Hemisphere, FOS: Physical sciences, Astronomy, Construction plan, Atomic and Molecular Physics, and Optics, Universe, Neutrino, Neutrino astronomy, Astrophysics - High Energy Astrophysical Phenomena, Effective volume, media_common
Abstract

Neutrino astronomy offers a novel view of the non-thermal Universe and is complementary to other astronomical disciplines. The field has seen rapid progress in recent years, including the first detection of astrophysical neutrinos in the TeV-PeV energy range by IceCube and the first identified extragalactic neutrino source (TXS 0506+056). Further discoveries are aimed for with new cubic-kilometer telescopes in the Northern Hemisphere: Baikal-GVD, in Lake Baikal, and KM3NeT-ARCA, in the Mediterranean sea. The construction of Baikal-GVD proceeds as planned; the detector currently includes over 2000 optical modules arranged on 56 strings, providing an effective volume of 0.35 km$^3$. We review the scientific case for Baikal-GVD, the construction plan, and first results from the partially built array., 9 pages, 5 figures, to be published in Proceedings of the 5-th International Conference on Particle Physics and Astrophysics (ICPPA-2020), October 5-9, 2020

Published
2021

2. Precision Analysis of the Xe136 Two-Neutrino ββ Spectrum in KamLAND-Zen and Its Impact on the Quenching of Nuclear Matrix Elements

Author

A. Gando, T. O'Donnell, Y. Kamei, Sanshiro Enomoto, S. Hirata, S. Hayashida, Yu. Efremenko, K. Soma, M Ha Minh, S. Umehara, Hugon J Karwowski, Fedor Šimkovic, Hideki Watanabe, Y. Gando, K. Tamae, John G. Learned, S. Matsuda, B. K. Fujikawa, B. E. Berger, K. Ueshima, S. Otsuka, J. A. Detwiler, Lindley Winslow, S. Obara, D. M. Markoff, K. Hosokawa, Akira Ono, J. Maricic, H. Ozaki, N. Ota, Toyohiko Kinoshita, D. Chernyak, M. P. Decowski, Y. Honda, Ken-Ichi Fushimi, A. Suzuki, T. Mitsui, T. Hachiya, K. Nakamura, A. Kozlov, Koji Ishidoshiro, Werner Tornow, K. Kamizawa, Y Takemoto, Kunio Inoue, I. Shimizu, R Dvornický, Tsugio Sato, S. Yoshida, H. Ikeda, Y. Shibukawa, A. Takeuchi, J. Shirai, Y. Shirahata, M. Koga, and Javier Fernandez Menendez

Subjects
Nuclear physics, Physics, Formalism (philosophy of mathematics), Quasiparticle, Nuclear shell model, General Physics and Astronomy, Electron, Neutrino
Abstract

We present a precision analysis of the ^{136}Xe two-neutrino ββ electron spectrum above 0.8 MeV, based on high-statistics data obtained with the KamLAND-Zen experiment. An improved formalism for the two-neutrino ββ rate allows us to measure the ratio of the leading and subleading 2νββ nuclear matrix elements (NMEs), ξ_{31}^{2ν}=-0.26_{-0.25}^{+0.31}. Theoretical predictions from the nuclear shell model and the majority of the quasiparticle random-phase approximation (QRPA) calculations are consistent with the experimental limit. However, part of the ξ_{31}^{2ν} range allowed by the QRPA is excluded by the present measurement at the 90% confidence level. Our analysis reveals that predicted ξ_{31}^{2ν} values are sensitive to the quenching of NMEs and the competing contributions from low- and high-energy states in the intermediate nucleus. Because these aspects are also at play in neutrinoless ββ decay, ξ_{31}^{2ν} provides new insights toward reliable neutrinoless ββ NMEs.

Published
2019

3. Detailed studies of $^{100}$Mo two-neutrino double beta decay in NEMO-3

Author

S. Blot, I. Vanushin, Lukas Fajt, M. Bongrand, Frédéric Nowacki, Karel Smolek, R. Saakyan, C. Vilela, B. Soulé, C. Augier, Masaharu Nomachi, Vl. I. Tretyak, S. Jullian, A. Smetana, V.E. Kovalenko, H. Gómez, Y. A. Ramachers, Jose Busto, F. Mauger, J. J. Evans, P. Guzowski, Y. Lemière, A. S. Barabash, S. Calvez, C. Patrick, A. Huber, D.V. Filosofov, M. Macko, Jouni Suhonen, A. Chapon, X. Sarazin, F. Xie, A. Chopra, Z. J. Liptak, A. J. Caffrey, R. Hodák, A. Žukauskas, V.I. Umatov, J.P. Cesar, Ph. Hubert, S. Torre, C. Girard-Carillo, X. Garrido, V. G. Egorov, O.I. Kochetov, S. Söldner-Rembold, F. Mamedov, E. Rukhadze, Yu. Shitov, V. Brudanin, D. Boursette, G. Eurin, D. Waters, J. C. Thomas, J. K. Sedgbeer, S. I. Konovalov, H. Ohsumi, F. Piquemal, T. Le Noblet, E. Chauveau, Guillaume Lutter, Dominique Durand, R. Dvornický, C. Cerna, Kevin Lang, Pavel P. Povinec, Ch. Marquet, C. Macolino, G. Oliviéro, C. Hugon, F. Nova, A. Minotti, A. Pin, R. L. Flack, L. Dawson, D. Lalanne, J. L. Reyss, B. Morgan, Michele Cascella, P. Loaiza, C. L. Riddle, R. B. Pahlka, L. Simard, D. Duchesneau, A. Remoto, R. Salazar, X.R. Liu, C.S. Sutton, R. Arnold, V. I. Tretyak, A.A. Smolnikov, G. Szklarz, B. Guillon, Fedor Šimkovic, P. Přidal, Igor Nemchenok, J. Mott, V. V. Timkin, Vit Vorobel, A. Salamatin, A. Basharina-Freshville, F. Perrot, H. Tedjditi, S. Blondel, I. Stekl, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Souterrain de Modane (LSM - UMR 6417), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), NEMO-3, Arnold, R, Augier, C, Barabash, A, Basharina-Freshville, A, Blondel, S, Blot, S, Bongrand, M, Boursette, D, Brudanin, V, Busto, J, Caffrey, A, Calvez, S, Cascella, M, Cerna, C, Cesar, J, Chapon, A, Chauveau, E, Chopra, A, Dawson, L, Duchesneau, D, Durand, D, Dvornicky, R, Egorov, V, Eurin, G, Evans, J, Fajt, L, Filosofov, D, Flack, R, Garrido, X, Girard-Carillo, C, Gomez, H, Guillon, B, Guzowski, P, Hodak, R, Huber, A, Hubert, P, Hugon, C, Jullian, S, Kochetov, O, Konovalov, S, Kovalenko, V, Lalanne, D, Lang, K, Lemiere, Y, Noblet, T, Liptak, Z, Liu, X, Loaiza, P, Lutter, G, Macko, M, Macolino, C, Mamedov, F, Marquet, C, Mauger, F, Minotti, A, Morgan, B, Mott, J, Nemchenok, I, Nomachi, M, Nova, F, Nowacki, F, Ohsumi, H, Oliviero, G, Pahlka, R, Patrick, C, Perrot, F, Pin, A, Piquemal, F, Povinec, P, Pridal, P, Ramachers, Y, Remoto, A, Reyss, J, Riddle, C, Rukhadze, E, Saakyan, R, Salamatin, A, Salazar, R, Sarazin, X, Sedgbeer, J, Shitov, Y, Simard, L, Simkovic, F, Smetana, A, Smolek, K, Smolnikov, A, Soldner-Rembold, S, Soule, B, Stekl, I, Suhonen, J, Sutton, C, Szklarz, G, Tedjditi, H, Thomas, J, Timkin, V, Torre, S, Tretyak, V, Umatov, V, Vanushin, I, Vilela, C, Vorobel, V, Waters, D, Xie, F, Zukauskas, A, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Science and Technology Facilities Council (STFC)

Subjects
Particle physics, S029MT, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Elementary particle, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], nucl-ex, invariance: Lorentz, 01 natural sciences, 7. Clean energy, neutrinoless double beta decay, decay modes, Physics, Particles & Fields, double-beta decay: (0neutrino), SEARCH, Double beta decay, 0103 physical sciences, ground state, Nuclear Experiment (nucl-ex), 010306 general physics, 0206 Quantum Physics, Engineering (miscellaneous), Nuclear Experiment, Majoron, S076H2N, Physics, Science & Technology, HALF-LIFE, 010308 nuclear & particles physics, MO-100, High Energy Physics::Phenomenology, Nuclear & Particles Physics, violation: Lorentz, nucleus: transition, STATES, statistics, Physical Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, spectral, electron: energy spectrum, High Energy Physics::Experiment, Neutrino, Ground state, Energy (signal processing), Radioactive decay, Lepton
Abstract

The full data set of the NEMO-3 experiment has been used to measure the half-life of the two-neutrino double beta decay of $^{100}$Mo to the ground state of $^{100}$Ru, $T_{1/2} = \left[ 6.81 \pm 0.01\,\left(\mbox{stat}\right) ^{+0.38}_{-0.40}\,\left(\mbox{syst}\right) \right] \times10^{18}$ y. The two-electron energy sum, single electron energy spectra and distribution of the angle between the electrons are presented with an unprecedented statistics of $5\times10^5$ events and a signal-to-background ratio of ~80. Clear evidence for the Single State Dominance model is found for this nuclear transition. Limits on Majoron emitting neutrinoless double beta decay modes with spectral indices of n=2,3,7, as well as constraints on Lorentz invariance violation and on the bosonic neutrino contribution to the two-neutrino double beta decay mode are obtained., 11 pages, 9 figures

Published
2019

4. Statistics of neutrinos and the double beta decay

Author

A.S. Barabash, Fedor Šimkovic, R. Dvornický, Alexander D. Dolgov, and A. Yu. Smirnov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Electron energy, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, FOS: Physical sciences, Electron, Upper and lower bounds, NO, High Energy Physics - Phenomenology, symbols.namesake, High Energy Physics - Phenomenology (hep-ph), Pauli exclusion principle, Double beta decay, Statistics, symbols, High Energy Physics::Experiment, Beta (velocity), Neutrino, Wave function
Abstract

We assume that the Pauli exclusion principle is violated for neutrinos, and thus, neutrinos obey at least partly the Bose-Einstein statistics. The parameter sin^2 chi is introduced that characterizes the bosonic (symmetric) fraction of the neutrino wave function. Consequences of the violation of the exclusion principle for the two-neutrino double beta decays are considered. This violation strongly changes the rates of the decays and modifies the energy and angular distributions of the emitted electrons. Pure bosonic neutrinos are excluded by the present data. In the case of partly bosonic (or mixed-statistics) neutrinos the analysis of the existing data allows to put the conservative upper bound sin^2 chi < 0.6. The sensitivity of future measurements of the two-neutrino double beta decay to sin^2 chi is evaluated., 25 pages including 8 eps figures

Published
2007

5. Neutrino Mass and Forbidden beta Decays

Author

R. Dvornický, D. Štefánik, and F. Šimkovic

Subjects
Physics, Nuclear physics, Particle physics, General Physics and Astronomy, Beta (velocity), Neutrino, Neutrino oscillation
Published
2016

6. Second unique forbidden β decay of [sup 115]In and neutrino mass

Author

R. Dvornický, F. Šimkovic, Osvaldo Civitarese, Ivan Stekl, and Jouni Suhonen

Subjects
Physics, Q value, chemistry.chemical_element, Parity (physics), Electron, Rhenium, Beta decay, Nuclear physics, medicine.anatomical_structure, chemistry, Excited state, medicine, Neutrino, Atomic physics, Nucleus
Abstract

The measurement of the electron spectrum in β decays close to the end point provides a robust direct determination of the values of neutrino masses. The most sensitive experiments use tritium and rhenium β decays because these transitions have low Q value. Recent measurement with Penning traps established that the β decay of 115In(9/2+) to the first excited state of 115Sn(3/2+) is a transition with the smallest Q value among β decays. The decay is associated with a change of spin and parity ΔJπ = 3+ (ΔL = 2, ΔS = 1) of nucleus, i.e., classified as unique second forbidden β decay. Our investigation shows that in this transition electrons are predominantly emitted in d5/2 partial waves. In addition, it is found that the Kurie function associated with this transition near the end point within a good accuracy reflects a behavior the Kurie function of superallowed β transitions.

Published
2011

7. Measuring mass of neutrinos with β-decays of tritium and rhenium

Author

R. Dvornický, F. Šimkovic, Osvaldo Civitarese, Ivan Stekl, and Jouni Suhonen

Subjects
Physics, Nuclear physics, Particle physics, Helium-3, Double beta decay, High Energy Physics::Experiment, Elementary particle, Invariant mass, Electron, Neutrino, Particle identification, KATRIN
Abstract

Already long time ago the shape of the electron spectrum in β‐decays of 3H and 187Re has been recognized as an important tool for understanding of neutrino masses. The sensitivity of KATRIN (in preparation, tritium β‐decay) and the MARE (under consideration, 187Re β‐decay) experiments to neutrino mass will reach the sub eV domain. In view of this experimental progress there is a request for a highly accurate theoretical description of the electron endpoint spectra. By taking the advantage of the elementary particle treatment of 3H and 3He the relativistic form for β‐decay endpoint spectrum of tritium is obtained by taking into account also the effect of nuclear recoil. Further, the currently unknown shape of the electron spectrum for the β‐decay of 187Re is presented. It is found that the first forbidden 187Re(5/2+)→187Os(1/2−)β‐decay transition is accompanied with emission of mostly p3/2‐state electrons.

Published
2009

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