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38th International Cosmic Ray Conference, ICRC 2023

作者： Scotti, Valentina Anastasio, Antonio Boiano, Alfonso Cafagna, Francesco Fornaro, Claudio Masone, Vincenzo Mese, Marco Osteria, Giuseppe Perfetto, Francesco Tortone, Gennaro Vanzanella, Antonio Abe, S. Adams, J.H. Allard, D. Alldredge, P. Aloisio, R. Anchordoqui, L. Anzalone, A. Arnone, E. Bagheri, M. Baret, B. Barghini, D. Battisti, M. Bellotti, R. Belov, A.A. Bertaina, M. Bertone, P.F. Bianciotto, M. Bisconti, F. Blaksley, C. Blin-Bondil, S. Bolmgren, K. Briz, S. Burton, J. Cafagna, F. Cambié, G. Campana, D. Capel, F. Caruso, R. Casolino, M. Cassardo, C. Castellina, A. Černý, K. Christl, M.J. Colalillo, R. Conti, L. Cotto, G. Crawford, H.J. Cremonini, R. Creusot, A. Cummings, A. de Castro Gónzalez, A. de la Taille, C. Diesing, R. Dinaucourt, P. Di Nola, A. Ebisuzaki, T. Eser, J. Fenu, F. Ferrarese, S. Filippatos, G. Finch, W.W. Flaminio, F. Fornaro, C. Fuehne, D. Fuglesang, C. Fukushima, M. Gadamsetty, S. Gardiol, D. Garipov, G.K. Gazda, E. Golzio, A. Guarino, F. Guépin, C. Haungs, A. Heibges, T. Isgrò, F. Judd, E.G. Kajino, F. Kaneko, I. Kim, S.-W. Klimov, P.A. Krizmanic, J.F. Kungel, V. Kuznetsov, E. López Martínez, F. Mandát, D. Manfrin, M. Marcelli, A. Marcelli, L. Marszal, W. Matthews, J.N. Mese, M. Meyer, S.S. Mimouni, J. Miyamoto, H. Mizumoto, Y. Monaco, A. Nagataki, S. Nachtman, J.M. Naumov, D. Neronov, A. Nonaka, T. Ogawa, T. Ogio, S. Ohmori, H. Olinto, A.V. Onel, Y. Osteria, G. Otte, A.N. Pagliaro, A. Panico, B. Parizot, E. Park, I.H. Paul, T. Pech, M. Perfetto, F. Picozza, P. Piotrowski, L.W. Plebaniak, Z. Posligua, J. Potts, M. Prevete, R. Prévôt, G. Przybylak, M. Reali, E. Reardon, P. Reno, M.H. Ricci, M. Romero Matamala, O.F. Romoli, G. Sagawa, H. Sakaki, N. Saprykin, O.A. Sarazin, F. Sato, M. Schovánek, P. Scotti, V. Selmane, S. Sharakin, S.A. Shinozaki, K. Stepanoff, S. Soriano, J.F. Szabelski, J. Tajima, N. Tajima, T. Takahashi, Y. Takeda, M. Takizawa, Y. Thomas, S.B. Tkachev, L.G. Tomida, T. Dipartimento di Fisica "E. Pancini" "Università degli Studi di Napoli Federico II" Complesso Universitario di Monte SantAngelo Napoli Italy Istituto Nazionale di Fisica Nucleare Sezione di Napoli Complesso Universitario di Monte SantAngelo Napoli Italy Istituto Nazionale di Fisica Nucleare Sezione di Bari Via E. Orabona 4 Bari Italy Università Telematica Internazionale Uninettuno Corso Vittorio Emanuele II 39 Roma Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma Tor Vergata Via della Ricerca Scientifica 1 Roma Italy Algiers Algeria Univ. Constantine I Constantine Algeria Joint Laboratory of Optics Faculty of Science Palacký University Olomouc Czech Republic Institute of Physics The Czech Academy of Sciences Prague Czech Republic Omega Ecole Polytechnique CNRS IN2P3 Palaiseau France Université de Paris CNRS AstroParticule et Cosmologie ParisF-75013 France France Germany Max Planck Institute for Physics Munich Germany Università degli Studi di Bari Aldo Moro Italy Dipartimento di Fisica e Astronomia "Ettore Majorana" Università di Catania Italy Istituto Nazionale di Fisica Nucleare Sezione di Catania Italy Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati Italy Istituto Nazionale di Fisica Nucleare Sezione di Napoli Italy Università di Napoli Federico II Dipartimento di Fisica "Ettore Pancini" Italy INAF - Istituto di Astrofisica Spaziale Fisica Cosmica di Palermo Italy Università di Roma Tor Vergata Dipartimento di Fisica Roma Italy Istituto Nazionale di Fisica Nucleare Sezione di Torino Italy Dipartimento di Fisica Università di Torino Italy Osservatorio Astrofisico di Torino Istituto Nazionale di Astrofisica Italy Uninettuno University Rome Italy Agenzia Spaziale Italiana Via del Politecnico Roma00133 Italy Gran Sasso Science Institute L’Aquila Italy Institute for Cosmic Ray Research University of Tokyo Kashiwa Japan Konan University Kobe Japan Shinshu University Nagano Japan National Astronomica

EUSO-SPB2 (Extreme Universe Space Observatory on a Super Pressure Balloon II) is a precursor mission for a future space observatory for multi-messenger astrophysics, planned to be launched in Spring 2023 with a flight duration target of 100 days. The Fluorescence Telescope (FT) hosted on board is designed to detect Ultra High Energy Cosmic Rays via the UV fluorescence emission of the Extensive Air Showers in the atmosphere. The data Processor (DP) of the FT is the component of the electronics system that performs data management and instrument control for the telescope. The DP controls front-end electronics, tags events with arrival time and payload position through a GPS system, provides signals for time synchronization of the event and measures the live and dead time of the telescope. Furthermore, it manages mass memory for data storage, performs housekeeping monitoring, and controls the power-on and power-off sequences. Finally, the data processor combines the data from the PDMs and onboard differential GPS and prioritizes data for download. The long duration of the flight poses strict requirements on electronics and data handling. The operations at high altitude in an unpressurized environment represent a technological challenge for heat dissipation. This contribution will provide an overview of the innovative elements developed and the results of the integration and field test campaigns. We will also present some preliminary analysis of the performance during the flight. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

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Implications of Mini-EUSO measurements for a space-based observation of UHECRs 38

Implications of Mini-EUSO measurements for a space-based obs...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Bertaina, Mario Battisti, Matteo Bianciotto, Marta Bolmgren, Karl Fenu, Francesco Abe, S. Adams, J.H. Allard, D. Alldredge, P. Aloisio, R. Anchordoqui, L. Anzalone, A. Arnone, E. Bagheri, M. Baret, B. Barghini, D. Battisti, M. Bellotti, R. Belov, A.A. Bertaina, M. Bertone, P.F. Bianciotto, M. Bisconti, F. Blaksley, C. Blin-Bondil, S. Bolmgren, K. Briz, S. Burton, J. Cafagna, F. Cambié, G. Campana, D. Capel, F. Caruso, R. Casolino, M. Cassardo, C. Castellina, A. Černý, K. Christl, M.J. Colalillo, R. Conti, L. Cotto, G. Crawford, H.J. Cremonini, R. Creusot, A. Cummings, A. de Castro Gónzalez, A. de la Taille, C. Diesing, R. Dinaucourt, P. Di Nola, A. Ebisuzaki, T. Eser, J. Fenu, F. Ferrarese, S. Filippatos, G. Finch, W.W. Flaminio, F. Fornaro, C. Fuehne, D. Fuglesang, C. Fukushima, M. Gadamsetty, S. Gardiol, D. Garipov, G.K. Gazda, E. Golzio, A. Guarino, F. Guépin, C. Haungs, A. Heibges, T. Isgrò, F. Judd, E.G. Kajino, F. Kaneko, I. Kim, S.-W. Klimov, P.A. Krizmanic, J.F. Kungel, V. Kuznetsov, E. López Martínez, F. Mandát, D. Manfrin, M. Marcelli, A. Marcelli, L. Marszal, W. Matthews, J.N. Mese, M. Meyer, S.S. Mimouni, J. Miyamoto, H. Mizumoto, Y. Monaco, A. Nagataki, S. Nachtman, J.M. Naumov, D. Neronov, A. Nonaka, T. Ogawa, T. Ogio, S. Ohmori, H. Olinto, A.V. Onel, Y. Osteria, G. Otte, A.N. Pagliaro, A. Panico, B. Parizot, E. Park, I.H. Paul, T. Pech, M. Perfetto, F. Picozza, P. Piotrowski, L.W. Plebaniak, Z. Posligua, J. Potts, M. Prevete, R. Prévôt, G. Przybylak, M. Reali, E. Reardon, P. Reno, M.H. Ricci, M. Romero Matamala, O.F. Romoli, G. Sagawa, H. Sakaki, N. Saprykin, O.A. Sarazin, F. Sato, M. Schovánek, P. Scotti, V. Selmane, S. Sharakin, S.A. Shinozaki, K. Stepanoff, S. Soriano, J.F. Szabelski, J. Tajima, N. Tajima, T. Takahashi, Y. Takeda, M. Takizawa, Y. Thomas, S.B. Tkachev, L.G. Tomida, T. Toscano, S. Traïche, M. Trofimov, D. Tsuno, K. Vallania, P. Valore, L. Venters, T.M. Vigorito, C. Vrabel, M. Wada, S. Watts, J. Wiencke, L. Winn, D. Wistrand, H. Yashin, I.V. Young, R. Zotov, M.Yu. University of Turin Department of Physics V. P. Giuria 1 Turin10125 Italy INFN Section of Turin Via P. Giuria 1 Turin10125 Italy Univ. Paris Cité CNRS Astroparticule & Cosmologie 10 Rue A. Domon & L. Duquet Paris75013 France KTH Royal Institute of Technology Brinellvgen 8 Stockholm114 28 Sweden ASI Italian Space Agency Via del Politecnico Rome00133 Italy KIT Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen76344 Germany Algiers Algeria Univ. Constantine I Constantine Algeria Joint Laboratory of Optics Faculty of Science Palacký University Olomouc Czech Republic Institute of Physics The Czech Academy of Sciences Prague Czech Republic Omega Ecole Polytechnique CNRS IN2P3 Palaiseau France Université de Paris CNRS AstroParticule et Cosmologie ParisF-75013 France France Germany Max Planck Institute for Physics Munich Germany Istituto Nazionale di Fisica Nucleare Sezione di Bari Italy Università degli Studi di Bari Aldo Moro Italy Dipartimento di Fisica e Astronomia "Ettore Majorana" Università di Catania Italy Istituto Nazionale di Fisica Nucleare Sezione di Catania Italy Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati Italy Istituto Nazionale di Fisica Nucleare Sezione di Napoli Italy Università di Napoli Federico II Dipartimento di Fisica "Ettore Pancini" Italy INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma Tor Vergata Italy Università di Roma Tor Vergata Dipartimento di Fisica Roma Italy Istituto Nazionale di Fisica Nucleare Sezione di Torino Italy Dipartimento di Fisica Università di Torino Italy Osservatorio Astrofisico di Torino Istituto Nazionale di Astrofisica Italy Uninettuno University Rome Italy Agenzia Spaziale Italiana Via del Politecnico Roma00133 Italy Gran Sasso Science Institute L’Aquila Italy Institute for Cosmic Ray Research University of Tokyo Kashiwa Japan Konan University Kobe Japan Shinshu Uni

Mini-EUSO is the first mission of the JEM-EUSO program on board the International Space Station. It was launched in August 2019 and it is operating since October 2019 being located in the Russian section (Zvezda module) of the station and viewing our planet from a nadir-facing UV-transparent window. The instrument is based on the concept of the original JEM-EUSO mission and consists of an optical system employing two Fresnel lenses of 25 cm each and a focal surface composed of 36 Multi-Anode Photomultiplier tubes, 64 channels each, for a total of 2304 channels with single photon counting sensitivity and an overall field of view of 44×44◦. Mini-EUSO can map the night-time Earth in the near UV range (predominantly between 290 nm and 430 nm), with a spatial resolution of about 6.3 km and different temporal resolutions of 2.5 μs, 320 μs and 41 ms. Mini-EUSO observations are extremely important to better assess the potential of a space-based detector in studying Ultra-High Energy Cosmic Rays (UHECRs) such as K-EUSO and POEMMA. In this contribution we focus the attention on the results of the UV measurements and we place them in the context of UHECR observations from space, namely the estimation of exposure. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic ray detectors

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EUSO-SPB2 Fluorescence Telescope Calibration and Field Tests 38

EUSO-SPB2 Fluorescence Telescope Calibration and Field Tests

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38th International Cosmic Ray Conference, ICRC 2023

作者： Kungel, Viktoria Battisti, Matteo Filippatos, George Heibges, Tobias Kuznetsov, Evgeny Mese, Marco Meyer, Stephan S. Parizot, Etienne Scotti, Valentina Sternberg, Partrick Wiencke, Lawrence Abe, S. Adams, J.H. Allard, D. Alldredge, P. Aloisio, R. Anchordoqui, L. Anzalone, A. Arnone, E. Bagheri, M. Baret, B. Barghini, D. Battisti, M. Bellotti, R. Belov, A.A. Bertaina, M. Bertone, P.F. Bianciotto, M. Bisconti, F. Blaksley, C. Blin-Bondil, S. Bolmgren, K. Briz, S. Burton, J. Cafagna, F. Cambié, G. Campana, D. Capel, F. Caruso, R. Casolino, M. Cassardo, C. Castellina, A. Černý, K. Christl, M.J. Colalillo, R. Conti, L. Cotto, G. Crawford, H.J. Cremonini, R. Creusot, A. Cummings, A. de Castro Gónzalez, A. de la Taille, C. Diesing, R. Dinaucourt, P. Di Nola, A. Ebisuzaki, T. Eser, J. Fenu, F. Ferrarese, S. Filippatos, G. Finch, W.W. Flaminio, F. Fornaro, C. Fuehne, D. Fuglesang, C. Fukushima, M. Gadamsetty, S. Gardiol, D. Garipov, G.K. Gazda, E. Golzio, A. Guarino, F. Guépin, C. Haungs, A. Heibges, T. Isgrò, F. Judd, E.G. Kajino, F. Kaneko, I. Kim, S.-W. Klimov, P.A. Krizmanic, J.F. Kungel, V. Kuznetsov, E. López Martínez, F. Mandát, D. Manfrin, M. Marcelli, A. Marcelli, L. Marszal, W. Matthews, J.N. Mese, M. Meyer, S.S. Mimouni, J. Miyamoto, H. Mizumoto, Y. Monaco, A. Nagataki, S. Nachtman, J.M. Naumov, D. Neronov, A. Nonaka, T. Ogawa, T. Ogio, S. Ohmori, H. Olinto, A.V. Onel, Y. Osteria, G. Otte, A.N. Pagliaro, A. Panico, B. Parizot, E. Park, I.H. Paul, T. Pech, M. Perfetto, F. Picozza, P. Piotrowski, L.W. Plebaniak, Z. Posligua, J. Potts, M. Prevete, R. Prévôt, G. Przybylak, M. Reali, E. Reardon, P. Reno, M.H. Ricci, M. Romero Matamala, O.F. Romoli, G. Sagawa, H. Sakaki, N. Saprykin, O.A. Sarazin, F. Sato, M. Schovánek, P. Scotti, V. Selmane, S. Sharakin, S.A. Shinozaki, K. Stepanoff, S. Soriano, J.F. Szabelski, J. Tajima, N. Tajima, T. Takahashi, Y. Takeda, M. Takizawa, Y. Thomas, S.B. Tkachev, L.G. Tomida, T. Colorado School of Mines 1500 Illinois St Golden United States Universitá di Torino V. P. Giuria 1 Turin Italy University of Alabama in Huntsville 301 Sparkman Dr NW Huntsville United States Università degli Studi di Napoli Federico II Corso Umberto I 40 Naples Italy University of Chicago 5801 S. Ellis Ave. Chicago United States APC Univ Paris Diderot CNRS IN2P3 CEA Irfu 13 rue Watt Paris France Algiers Algeria Univ. Constantine I Constantine Algeria Joint Laboratory of Optics Faculty of Science Palacký University Olomouc Czech Republic Institute of Physics The Czech Academy of Sciences Prague Czech Republic Omega Ecole Polytechnique CNRS IN2P3 Palaiseau France Université de Paris CNRS AstroParticule et Cosmologie ParisF-75013 France France Germany Max Planck Institute for Physics Munich Germany Istituto Nazionale di Fisica Nucleare Sezione di Bari Italy Università degli Studi di Bari Aldo Moro Italy Dipartimento di Fisica e Astronomia "Ettore Majorana" Università di Catania Italy Istituto Nazionale di Fisica Nucleare Sezione di Catania Italy Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati Italy Istituto Nazionale di Fisica Nucleare Sezione di Napoli Italy Università di Napoli Federico II Dipartimento di Fisica "Ettore Pancini" Italy INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma Tor Vergata Italy Università di Roma Tor Vergata Dipartimento di Fisica Roma Italy Istituto Nazionale di Fisica Nucleare Sezione di Torino Italy Dipartimento di Fisica Università di Torino Italy Osservatorio Astrofisico di Torino Istituto Nazionale di Astrofisica Italy Uninettuno University Rome Italy Agenzia Spaziale Italiana Via del Politecnico Roma00133 Italy Gran Sasso Science Institute L’Aquila Italy Institute for Cosmic Ray Research University of Tokyo Kashiwa Japan Konan University Kobe Japan Shinshu University Nagano Japan National Astr

The Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2), successfully launched from Wanaka, New Zealand on May 13, 2022, is a precursor for a space-based astroparticle observatory such as the Probe Of Extreme Multi-Messenger Astrophysics (POEMMA). EUSO-SPB2 flew two custom telescopes. Both have UV/UV-visible sensitivity and feature Schmidt optics. The Fluorescence Telescope (FT) measures ultra-high energy cosmic rays by looking down. The Čerenkov Telescope (CT) searches for neutrino signatures by looking toward Earth’s limb. The two telescopes each have a 1 m diameter entrance pupil and segmented glass mirrors that collect light from extensive air showers at the PeV and EeV-scale. Here we describe the FT telescope optics together with the results of the FT field tests at the Utah Telescope Array (TA) site from August/September 2022. The FT recorded the night sky background, lasers, and artificial point sources. The field tests included an absolute photometric calibration of the FT telescope that is compared to a piece-wise laboratory calibration. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

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Many-body correlations in shell model effective interactions derived by ab initio methods and the V_(low-k) approach

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Chinese Physics C 2018年第11期42卷 78-84页

作者： Xiao-Bao Wang Guo-Xiang Dong Hua-Lei Wang Cen-Xi Yuan Yong-Jing Chen Ya Tu School of Science Huzhou UniversityHuzhou 313000China School of Physics and Engineering Zhengzhou UniversityZhengzhou 450001China Sino-Prench Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Key Laboratory of Science and Technology on Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Physics Science and Technology Shenyang Normal UniversityShenyang 110034China

We investigate many-body correlations caused by two- and three-body （2-, 3bd） forces. Shell-model effective interactions derived from ab initio methods （coupled-cluster method, no-core shell model） are adopted. Vlow-k potentials, based on many-body perturbation theory, are also tested, especially for their cut-off dependence. We compare the central, tensor and spin-orbit interactions from microscopic theory to the fitted interactions. After the inclusion of the three-body force, the matrix elements become fairly close to those fitted directly to experimental data. Calculations of neutron-rich oxygen isotopes are performed, to clarify the effects of 3bd forces, tensor, and spin-orbit interactions on the nuclear binding and excitation energies. We find that the 3bd force can influence the binding energies greatly, which also determines the drip line position, while its effect on excitation energies is not very pronounced. The spin-orbit force, which is part of the 2bd force, can affect the shell structure explicitly, at least for neutron-rich systems.

关键词： shell model effective interactions tensor force three-body force

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Microsecond Isomer at the N=20 Island of Shape Inversion Observed at FRIB

arXiv

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arXiv 2023年

作者： Gray, T.J. Allmond, J.M. Xu, Z. King, T.T. Lubna, R.S. Crawford, H.L. Tripathi, V. Crider, B.P. Grzywacz, R. Liddick, S.N. Macchiavelli, A.O. Miyagi, T. Poves, A. Andalib, A. Argo, E. Benetti, C. Bhattacharya, S. Campbell, C.M. Carpenter, M.P. Chan, J. Chester, A. Christie, J. Clark, B.R. Cox, I. Doetsch, A.A. Dopfer, J. Duarte, J.G. Fallon, P. Frotscher, A. Gaballah, T. Harke, J.T. Heideman, J. Huegen, H. Holt, J.D. Jain, R. Kitamura, N. Kolos, K. Kondev, F.G. Laminack, A. Longfellow, B. Luitel, S. Madurga, M. Mahajan, R. Mogannam, M.J. Morse, C. Neupane, S. Nowicki, A. Ogunbeku, T.H. Ong, W.-J. Porzio, C. Prokop, C.J. Rasco, B.C. Ronning, E.K. Rubino, E. Ruland, T.J. Rykaczewski, K.P. Schaedig, L. Seweryniak, D. Siegl, K. Singh, M. Stuchbery, A.E. Tabor, S.L. Tang, T.L. Wheeler, T. Winger, J.A. Wood, J.L. Physics Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Physics and Astronomy University of Tennessee KnoxvilleTN37966 United States Facility for Rare Isotope Beams Michigan State University East LansingMI48824 United States Nuclear Science Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Department of Physics Florida State University TallahasseeFL32306 United States Department of Physics and Astronomy Mississippi State University Mississippi StateMS39762 United States Department of Chemistry Michigan State University East LansingMI48824 United States Department of Physics Technische Universität Darmstadt Darmstadt Germany ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt64291 Germany Departamento de Fìsica Teórica IFT-UAM CSIC Universidad Autónoma de Madrid MadridE-28049 Spain Department of Physics and Astronomy Michigan State University East LansingMI48824 United States Argonne National Laboratory ArgonneIL60439 United States Lawrence Livermore National Laboratory LivermoreCA94550 United States TRIUMF 4004 Wesbrook Mall VancouverBCV6T 2A3 Canada Department of Physics McGill University MontréalQCH3A 2T8 Canada National Nuclear Data Center Brookhaven National Laboratory UptonNY11973 United States Los Alamos National Laboratory Los AlamosNM87545 United States Department of Physics and Astronomy Louisiana State University Baton RougeLA70803 United States Department of Nuclear Physics and Accelerator Applications Research School of Physics Australian National University CanberraACT2601 Australia School of Physics Georgia Institute of Technology AtlantaGA30332-0430 United States

Excited-state spectroscopy from the first Facility for Rare Isotope Beams (FRIB) experiment is reported. A 24(2)-µs isomer was observed with the FRIB Decay Station initiator (FDSi) through a cascade of 224- and 401-keV γ rays in coincidence with 32Na nuclei. This is the only known microsecond isomer (1 µs ≤ T1/2 32Mg, 32Mg + π−1 + ν+1. This odd-odd coupling and isomer formation provides a sensitive measure of the underlying shape degrees of freedom of 32Mg, where the onset of spherical-to-deformed shape inversion begins with a low-lying deformed 2+ state at 885 keV and a low-lying shape-coexisting 0+2 state at 1058 keV. We suggest two possible explanations for the 625-keV isomer in 32Na: a 6− spherical shape isomer that decays by E2 or a 0+ deformed spin isomer that decays by M2. The present results and calculations are most consistent with the latter, indicating that the low-lying states are dominated by deformation. Copyright © 2023, The Authors. All rights reserved.

关键词： Isomers

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Role of N∗(1535) in the Λ+c → K¯0ηp decay and the possible φp state in the Λ+c → π0φp decay 12

Role of N∗(1535) in the Λ+c → K¯0ηp decay and the possi...

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12th International Workshop on the Physiecs of Excited Nucleons, NSTAR 2019

作者： Xie, Ju-Jun Geng, Li-Sheng Guo, Feng-Kun Institute of Modern Physics Chinese Academy of Sciences Lanzhou730000 China School of Nuclear Science and Technology University of Chinese Academy of Sciences Beijing100049 China School of Physics and Microelectronics Zhengzhou University Henan Zhengzhou450001 China School of Physics Beijing Advanced Innovation Center for Big Data-based Precision Medicine Beihang University Beijing100191 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Zhong Guan Cun East Street 55 Beijing100190 China

The nonleptonic weak decays of Λ+c → K¯0ηp and Λ+c → π0φp are investigated from the viewpoint of probing the N∗(1535) resonance and the possible φp state. For the Λ+c → K¯0ηp decay, we study the invariant mass distribution of ηp with both the chiral unitary approach and an effective Lagrangian model. Within the chiral unitary approach, the N∗(1535) resonance is dynamically generated from the final state interaction of mesons and baryons in coupled channels. While for the effective Lagrangian model, we take a Breit-Wigner formula for the N∗(1535) resonance. We found that the behavior of the N∗(1535) resonance in the Λ+c → K¯0N∗(1535) → K¯0ηp decay within the two approaches is different. For the Λ+c → π0φp decay, we consider a triangle singularity mechanism, where the Λ+c decays into the K∗Σ∗(1385), the Σ∗(1385) decays into the π0Σ/Λ, and then the K∗Σ/Λ merge to produce the φp in the final state. This mechanism produces a peak structure around 2020 MeV. In addition, the possibility that there is a hidden-strange pentaquark-like state is also considered by taking into account the final state interactions of K∗Λ, K∗Σ, and φp. We conclude that it is difficult to search for the hidden-strange state in this decay. However, we do expect nontrivial behavior in the φp invariant mass distribution. The proposed Λ+c decay mechanism here can provide valuable information on the properties of these nuclear resonances and can in principle be tested by experiments such as BESIII, LHCb and Belle-II. © The Authors, published by EDP sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0.

关键词： Lagrange multipliers

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One-dimensional deep low-rank and sparse network for accelerated MRI

arXiv

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arXiv 2021年

作者： Wang, Zi Qian, Chen Guo, Di Sun, Hongwei Li, Rushuai Zhao, Bo Qu, Xiaobo Department of Electronic Science Biomedical Intelligent Cloud R&D Center Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance National Institute for Data Science in Health and Medicine Xiamen University China School of Computer and Information Engineering Xiamen University of Technology Xiamen China United Imaging Research Institute of Intelligent Imaging Beijing China Department of Nuclear Medicine Nanjing First Hospital Nanjing Medical University Nanjing China Department of Biomedical Engineering Oden Institute for Computational Engineering and Sciences University of Texas at Austin Austin United States

Deep learning has shown astonishing performance in accelerated magnetic resonance imaging (MRI). Most state-of-the-art deep learning reconstructions adopt the powerful convolutional neural network and perform 2D convolution since many magnetic resonance images or their corresponding k-space are in 2D. In this work, we present a new approach that explores the 1D convolution, making the deep network much easier to be trained and generalized. We further integrate the 1D convolution into the proposed deep network, named as One-dimensional Deep Low-rank and Sparse network (ODLS), which unrolls the iteration procedure of a low-rank and sparse reconstruction model. Extensive results on in vivo knee and brain datasets demonstrate that, the proposed ODLS is very suitable for the case of limited training subjects and provides improved reconstruction performance than state-of-the-art methods both visually and quantitatively. Additionally, ODLS also shows nice robustness to different undersampling scenarios and some mismatches between the training and test data. In summary, our work demonstrates that the 1D deep learning scheme is memory-efficient and robust in fast MRI. Copyright © 2021, The Authors. All rights reserved.

关键词： Magnetic resonance imaging

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Searching for Beyond the Standard Model physics using the improved description of 100Mo 2vββ decay spectral shape with CUPID-Mo

arXiv

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arXiv 2024年

作者： Augier, C. Barabash, A.S. Bellini, F. Benato, G. Beretta, M. Bergé, L. Billard, J. Borovlev, Yu A. Cardani, L. Casali, N. Cazes, A. Celi, Emanuela Chapellier, M. Chiesa, D. Dafinei, I. Danevich, F.A. De Jesus, M. Dixon, T. Dumoulin, L. Eitel, K. Ferri, F. Fujikawa, B.K. Gascon, J. Gironi, L. Giuliani, A. Grigorieva, V.D. Gros, M. Helis, D.L. Huang, H.Z. Huang, R. Imbert, L. Juillard, A. Khalife, H. Kleifges, M. Kobychev, V.V. Kolomensky, Yu G. Konovalov, S.I. Kotila, J. Loaiza, P. Ma, L. Makarov, E.P. de Marcillac, P. Mariam, R. Marini, L. Marnieros, S. Navick, X.F. Nones, C. Norman, E.B. Olivieri, E. Ouellet, J.L. Pagnanini, L. Pattavina, L. Paul, B. Pavan, M. Peng, H. Pessina, G. Pirro, S. Poda, D.V. Polischuk, O.G. Pozzi, S. Previtali, E. Redon, Th Rojas, A. Rozov, S. Sanglard, V. Scarpaci, J.A. Schmidt, B. Shen, Y. Shlegel, V.N. Šimkovic, F. Singh, V. Tomei, C. Tretyak, V.I. Umatov, V.I. Vagneron, L. Velázquez, M. Ware, B. Welliver, B. Winslow, L. Xue, M. Yakushev, E. Zarytskyy, M. Zolotarova, A.S. Univ Lyon Université Lyon 1 CNRS IN2P3 IP2I-Lyon VilleurbanneF-69622 France National Research Centre Kurchatov Institute Kurchatov Complex of Theoretical and Experimental Physics Moscow117218 Russia Dipartimento di Fisica Sapienza Università di Roma P.le Aldo Moro 2 RomeI-00185 Italy INFN Sezione di Roma P.le Aldo Moro 2 RomeI-00185 Italy Gran Sasso Science Institute L’AquilaI-67100 Italy AssergiI-67100 Italy Department of Physics University of California BerkeleyCA94720 United States Université Paris-Saclay CNRS IN2P3 IJCLab Orsay91405 France Nikolaev Institute of Inorganic Chemistry Novosibirsk630090 Russia Dipartimento di Fisica Università di Milano-Bicocca MilanoI-20126 Italy INFN Sezione di Milano-Bicocca MilanoI-20126 Italy Institute for Nuclear Research of National Academy of Sciences of Ukraine Kyiv03028 Ukraine INFN Sezione di Roma Tor Vergata Via della Ricerca Scientifica 1 RomeI-00133 Italy Institute for Astroparticle Physics Karlsruhe Institute of Technology Karlsruhe76021 Germany IRFU CEA Université Paris-Saclay Gif-sur-YvetteF-91191 France Nuclear Science Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Fudan University Shanghai200433 China Institute for Data Processing and Electronics Karlsruhe Institute of Technology Karlsruhe76021 Germany 409 Atomistilor Street Bucharest-Magurele077125 Romania Finnish Institute for Educational Research University of Jyväskylä P.O. Box 35 JyväskyläFI-40014 Finland Center for Theoretical Physics Sloane Physics Laboratory Yale University New HavenCT06520-8120 United States Massachusetts Institute of Technology CambridgeMA02139 United States Physik Department Technische Universität München GarchingD-85748 Germany Department of Modern Physics University of Science and Technology of China Hefei230027 China Université Grenoble Alpes CNRS Grenoble INP LPSC/LSM-IN2P3 Modane73500 France Laboratory of Nuclear Problems JINR Moscow

The current experiments searching for neutrinoless double-β (0βvβ) decay also collect large statistics of Standard Model allowed two-neutrino double-β (2vββ) decay events. These can be used to search for Beyond Standard Model (BSM) physics via 2vββ decay spectral distortions. 100Mo has a natural advantage due to its relatively short half-life, allowing higher β2vβ decay statistics at equal exposures compared to the other isotopes. We demonstrate the potential of the dual read-out bolometric technique exploiting a 100Mo exposure of 1.47 kg × y, acquired in the CUPID-Mo experiment at the Modane underground laboratory (France). We set limits on 0vββ decays with the emission of one or more Majorons, on 2vββ decay with Lorentz violation, and 2vββ decay with a sterile neutrino emission. In this analysis, we investigate the systematic uncertainty induced by modeling the 2vββ decay spectral shape parameterized through an improved model, an effect never considered before. This work motivates searches for BSM processes in the upcoming CUPID experiment, which will collect the largest amount of 2vββ decay events among the next-generation experiments. © 2024, CC BY.

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Introducing the DREAMS Project: DaRk mattEr and Astrophysics with Machine learning and Simulations

arXiv

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arXiv 2024年

作者： Rose, Jonah C. Torrey, Paul Villaescusa-Navarro, Francisco Lisanti, Mariangela Nguyen, Tri Roy, Sandip Kollmann, Kassidy E. Vogelsberger, Mark Cyr-Racine, Francis-Yan Medvedev, Mikhail V. Genel, Shy Anglés-Alcázar, Daniel Kallivayalil, Nitya Wang, Bonny Y. Costanza, Belén O'Neil, Stephanie Roche, Cian Karmakar, Soumyodipta Garcia, Alex M. Low, Ryan Lin, Shurui Mostow, Olivia Cruz, Akaxia Caputo, Andrea Farahi, Arya Muñoz, Julian B. Necib, Lina Teyssier, Romain Dalcanton, Julianne J. Spergel, David Department of Astronomy University of Florida GainesvilleFL32611 United States Center for Computational Astrophysics Flatiron Institute 162 5th Avenue New YorkNY10010 United States Department of Astronomy University of Virginia CharlottesvilleVA22904 United States Department of Astrophysical Sciences Princeton University Peyton Hall PrincetonNJ08544 United States Department of Physics Princeton University PrincetonNJ08544 United States Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States The NSF AI Institute for Artificial Intelligence and Fundamental Interactions CambridgeMA02139 United States Department of Physics and Astronomy University of New Mexico 210 Yale Blvd NE AlbuquerqueNM87106 United States Institute for Advanced Study School for Natural Sciences PrincetonNJ08540 United States Institute for Theory and Computation Harvard University CambridgeMA02138 United States Department of Physics and Astronomy University of Kansas LawrenceKS66045 United States Laboratory for Nuclear Science Massachusetts Institute of Technology CambridgeMA02139 United States Columbia Astrophysics Laboratory Columbia University 550 West 120th Street New YorkNY10027 United States Department of Physics University of Connecticut 196 Auditorium Road U-3046 StorrsCT06269-3046 United States McWilliams Center for Cosmology and Astrophysics Carnegie Mellon University PittsburghPA15213 United States Facultad de Ciencias Astronómicas y Geofísicas Universidad Nacional de La Plata Observatorio Astronómico Paseo del Bosque La PlataB1900FWA Argentina Department of Astronomy School of Physical Sciences University of Science and Technology of China Anhui Hefei230026 China CAS Key Laboratory for Researches in Galaxies and Cosmology School of Astronomy and Space Science University of Science and Technology of China Anhui Hefei230026 China Theoretical Physics Depa

We introduce the DREAMS project, an innovative approach to understanding the astrophysical implications of alternative dark matter models and their effects on galaxy formation and evolution. The DREAMS project will ultimately comprise thousands of cosmological hydrodynamic simulations that simultaneously vary over dark matter physics, astrophysics, and cosmology in modeling a range of systems-from galaxy clusters to ultra-faint satellites. Such extensive simulation suites can provide adequate training sets for machine-learning-based analyses. This paper introduces two new cosmological hydrodynamical suites of Warm Dark Matter, each comprised of 1024 simulations generated using the arepo code. One suite consists of uniform-box simulations covering a (25 ℎ−1 M☉)3 volume, while the other consists of Milky Way zoom-ins with sufficient resolution to capture the properties of classical satellites. For each simulation, the Warm Dark Matter particle mass is varied along with the initial density field and several parameters controlling the strength of baryonic feedback within the IllustrisTNG model. We provide two examples, separately utilizing emulators and Convolutional Neural Networks, to demonstrate how such simulation suites can be used to disentangle the effects of dark matter and baryonic physics on galactic properties. The DREAMS project can be extended further to include different dark matter models, galaxy formation physics, and astrophysical targets. In this way, it will provide an unparalleled opportunity to characterize uncertainties on predictions for small-scale observables, leading to robust predictions for testing the particle physics nature of dark matter on these scales. © 2024, CC BY.

关键词： Galaxies

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Measurement of the 2νββ Decay Rate and Spectral Shape of Mo100 from the CUPID-Mo Experiment

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Physical Review Letters 2023年第16期131卷 162501-162501页

作者： C. Augier A. S. Barabash F. Bellini G. Benato M. Beretta L. Bergé J. Billard Yu. A. Borovlev L. Cardani N. Casali A. Cazes E. Celi M. Chapellier D. Chiesa I. Dafinei F. A. Danevich M. De Jesus T. Dixon L. Dumoulin K. Eitel F. Ferri B. K. Fujikawa J. Gascon L. Gironi A. Giuliani V. D. Grigorieva M. Gros D. L. Helis H. Z. Huang R. Huang L. Imbert J. Johnston A. Juillard H. Khalife M. Kleifges V. V. Kobychev Yu. G. Kolomensky S. I. Konovalov J. Kotila P. Loaiza L. Ma E. P. Makarov P. de Marcillac R. Mariam L. Marini S. Marnieros X.-F. Navick C. Nones E. B. Norman E. Olivieri J. L. Ouellet L. Pagnanini L. Pattavina B. Paul M. Pavan H. Peng G. Pessina S. Pirro D. V. Poda O. G. Polischuk S. Pozzi E. Previtali Th. Redon A. Rojas S. Rozov V. Sanglard J. A. Scarpaci B. Schmidt Y. Shen V. N. Shlegel F. Šimkovic V. Singh C. Tomei V. I. Tretyak V. I. Umatov L. Vagneron M. Velázquez B. Ware B. Welliver L. Winslow M. Xue E. Yakushev M. Zarytskyy A. S. Zolotarova Univ Lyon Université Lyon 1 CNRS/IN2P3 IP2I-Lyon F-69622 Villeurbanne France National Research Centre “Kurchatov Institute ” Kurchatov Complex of Theoretical and Experimental Physics 117218 Moscow Russia Dipartimento di Fisica Sapienza Università di Roma Piazzale Aldo Moro 2 I-00185 Rome Italy INFN Sezione di Roma P.le Aldo Moro 2 I-00185 Rome Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi (AQ) Italy INFN Gran Sasso Science Institute I-67100 L’Aquila Italy University of California Berkeley California 94720 USA Université Paris-Saclay CNRS/IN2P3 IJCLab 91405 Orsay France Nikolaev Institute of Inorganic Chemistry 630090 Novosibirsk Russia Dipartimento di Fisica Università di Milano-Bicocca I-20126 Milano Italy INFN Sezione di Milano-Bicocca I-20126 Milano Italy Institute for Nuclear Research of NASU 03028 Kyiv Ukraine INFN Sezione di Roma Tor Vergata Via della Ricerca Scientifica 1 I-00133 Rome Italy IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France Karlsruhe Institute of Technology Institute for Astroparticle Physics 76021 Karlsruhe Germany Lawrence Berkeley National Laboratory Berkeley California 94720 USA Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) Fudan University Shanghai 200433 People’s Republic of China Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Karlsruhe Institute of Technology Institute for Data Processing and Electronics 76021 Karlsruhe Germany National Research Centre Kurchatov Institute Institute of Theoretical and Experimental Physics 117218 Moscow Russia Department of Physics University of Jyväskylä P.O. Box 35 FI-40014 Jyväskylä Finland Finnish Institute for Educational Research University of Jyväskylä P.O. Box 35 FI-40014 Jyvaäskylä Finland Center for Theoretical Physics Sloane Physics Laboratory Yale University New Haven Connecticut 06520-8120 USA Physik Department Technische Universität München Garching D-85748 Germany Department of Modern P

Neutrinoless double beta decay (0νββ) is a yet unobserved nuclear process that would demonstrate Lepton number violation, a clear evidence of beyond standard model physics. The process two neutrino double beta decay (2νββ) is allowed by the standard model and has been measured in numerous experiments. In this Letter, we report a measurement of 2νββ decay half-life of Mo100 to the ground state of Ru100 of [7.07±0.02(stat)±0.11(syst)]×1018 yr by the CUPID-Mo experiment. With a relative precision of ±1.6% this is the most precise measurement to date of a 2νββ decay rate in Mo100. In addition, we constrain higher-order corrections to the spectral shape, which provides complementary nuclear structure information. We report a novel measurement of the shape factor ξ3,1=0.45±0.03(stat)±0.05(syst) based on a constraint on the ratio of higher-order terms from theory, which can be reliably calculated. This is compared to theoretical predictions for different nuclear models. We also extract the first value for the effective axial vector coupling constant obtained from a spectral shape study of 2νββ decay.

关键词： Double beta decay Neutrinoless double beta decay nuclear structure & decays

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