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arXiv 2022年

作者： Nichols, A.L. Dimitriou, Paraskevi Algora, A. Fallot, M. Giot, L. Kondev, F.G. Yoshida, T. Karny, M. Mukherjee, G. Rasco, B.C. Rykaczewski, K.P. Sonzogni, A.A. Tain, J.L. Physics Division Argonne National Laboratory LemontIL60439 United States Institute of Innovative Research Tokyo Institute of Technology Tokyo152-8550 Japan Physics Faculty University of Warsaw WarsawPL-02-093 Poland Variable Energy Cyclotron Centre Kolkata700064 India Physics Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Nuclear Science and Technology Department Building 817 Brookhaven National Laboratory UptonNY19973-5000 United States Department of Physics University of Surrey Surrey GuildfordGU2 7XH United Kingdom Manipal Academy of Higher Education Karnataka Manipal576104 India Nuclear Data Section International Atomic Energy Agency ViennaA-1400 Austria CSIC-Universidad de Valencia Valencia46071 Spain Debrecen Hungary Laboratoire Subatech University of Nantes CNRS IN2P3 Institut Mines Telecom Atlantique Nantes44307 France

Effort has been expended to assess the relative merits of undertaking further decay-data measurements of the main fission-product contributors to the decay heat of neutron-irradiated fissile fuel and related actinides by means of Total Absorption Gamma-ray Spectroscopy (TAGS/TAS) and Discrete Gamma-ray Spectroscopy (DGS). This review has been carried out following similar work performed under the auspices of OECD/WPEC-Subgroup 25 (2005-2007) and the International Atomic Energy Agency (2010, 2014), and various highly relevant TAGS measurements completed as a consequence of such assessments. We present our recommendations for new decay-data evaluations, along with possible requirements for total absorption and discrete high-resolution gamma-ray spectroscopy studies that cover approximately 120 fission products and various isomeric states. © 2022, CC BY-SA.

关键词： Fission products

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First Exploration of Monopole-Driven Shell Evolution above the N = 126 shell closure: new Millisecond Isomers in 213Tl and 215Tl

arXiv

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arXiv 2024年

作者： Yeung, T.T. Morales, A.I. Wu, J. Liu, M. Yuan, C. Nishimura, S. Phong, V.H. Fukuda, N. Tain, J.L. Davinson, T. Rykaczewski, K.P. Yokoyama, R. Isobe, T. Niikura, M. Podolyák, Zs. Alcalá, G. Algora, A. Agramunt, J. Appleton, C. Baba, H. Caballero-Folch, R. Calvino, F. Carpenter, M.P. Dillmann, I. Estrade, A. Gao, T. Griffin, C.J. Grzywacz, R. Hall, O. Hirayama, Y. Hue, B.M. Ideguchi, E. Kiss, G.G. Kokubun, K. Kondev, F.G. Mizuno, R. Mukai, M. Nepal, N. Nurhafiza, M.N. Ohta, S. Orrigo, S.E.A. Pallàs, M. Park, J. Rodríguez-García, D. Sakurai, H. Sexton, L. Shimizu, Y. Suzuki, H. Sveiczer, A. Takeda, H. Tarifeno-Saldivia, A. Tolosa-Delgado, A. Victoria, J.A. Watanabe, Y.X. Yap, J.M. Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan RIKEN Nishina Center 2-1 Hirosawa Saitama Wako351-0198 Japan Instituto de Física Corpuscular CSIC-Universitat de València ValènciaE-46071 Spain National Nuclear Data Center Brookhaven National Laboratory UptonNY11973 United States Facility for Rare Isotope Beams Michigan State University East LansingMI48824 United States Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Guangdong Zhuhai519082 China Faculty of Physics VNU Hanoi University of Science 334 Nguyen Trai Thanh Xuan Hanoi Viet Nam School of Physics and Astronomy University of Edinburgh EdinburghEH9 3FD United Kingdom Physics Division Oak Ridge National Laboratory Physics Division TN37831-6371 United States Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States Center for Nuclear Study The University of Tokyo 2-1 Hirosawa Saitama Wako351-0198 Japan Department of Physics University of Surrey Guildford SurreyGU2 7XH United Kingdom HUN-REN Institute for Nuclear Research Bem tér 18/c DebrecenH4032 Hungary TRIUMF VancouverBCV6T 2A3 Canada Universitat Politecnica de Catalunya BarcelonaE-08028 Spain Physics Division Argonne National Laboratory ArgonneIL60439 United States Department of Physics and Astronomy University of Victoria VictoriaBCV8P 5C2 Canada Department of Physics Central Michigan University Mount PleasantMI48859 United States Department of Physics The University of Hong Kong Pokfulam Hong Kong Saitama Wako351-0198 Japan Institute of Physics Vietnam Academy of Science and Technology Hanoi10000 Viet Nam Osaka University 10-1 Mihogaoka Ibaraki Osaka567-0047 Japan Department of Applied Energy Nagoya University Nagoya464-8603 Japan Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka Toyonaka560-0043 Japan Center for Exotic Nuclear Studies Institute for Basic Science Korea

Isomer spectroscopy of heavy neutron-rich nuclei beyond the N = 126 closed shell has been performed for the first time at the Radioactive Isotope Beam Factory of the RIKEN Nishina Center. New millisecond isomers have been identified at low excitation energies, 985.3(19) keV in 213Tl and 874(5) keV in 215Tl. The measured half-lives of 1.34(5) ms in 213Tl and 3.0(3) ms in 215Tl suggest spins and parities 11/2− with the single proton-hole configuration πh11/2 as leading component. They are populated via E1 transitions by the decay of higher-lying isomeric states with proposed spin and parity 17/2+, interpreted as arising from a single πs1/2 proton hole coupled to the 8+ seniority isomer in the A+1Pb cores. The lowering of the 11/2− states is ascribed to an increase of the πh11/2 proton effective single-particle energy as the second νg9/2 orbital is filled by neutrons, owing to a significant reduction of the proton-neutron monopole interaction between the πh11/2 and νg9/2 orbitals. The new ms-isomers provide the first experimental observation of shell evolution in the almost unexplored N > 126 nuclear region below doubly-magic 208Pb. Copyright © 2024, The Authors. All rights reserved.

关键词： Isomers

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Erratum: Real-time digital trigger system for GTAF-II at CSNS Back-n white neutron source

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Journal of Instrumentation 2022年第8期17卷 E08006-E08006页

作者： L. Xie P. Cao T. Yu X. Tang Z. Jiang Q. An Xi. Huang C. Li J. Li M. Gu Q. Zhang G. Luan X. Ruan G. He J. Ren J. Bai J. Bao Y. Bao H. Chen Q. Chen Y. Chen Z. Chen Z. Cui R. Fan C. Feng K. Gao X. Gao C. Han Z. Han Y. He Y. Hong Y. Hu H. Huang H. Jiang W. Jiang H. Jing L. Kang B. Li Q. Li X. Li Y. Li J. Liu R. Liu S. Liu X. Liu Z. Long C. Ning M. Niu B. Qi Z. Ren Z. Song K. Sun Z. Sun Z. Tan J. Tang B. Tian L. Wang P. Wang Z. Wang Z. Wen X. Wu X. Yang Y. Yang H. Yi L. Yu Y. Yu G. Zhang L. Zhang X. Zhang Y. Zhang Z. Zhang L. Zhou Z. Zhou K. Zhu State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei China Department of Modern Physics University of Science and Technology of China Hefei China Institute of High Energy Physics Chinese Academy of Sciences (CAS) Beijing China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of Sciences Beijing China Key Laboratory of Nuclear Data China Institute of Atomic Energy Beijing China Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Mianyang China Spallation Neutron Source Science Center Dongguan China State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing China Northwest Institute of Nuclear Technology Xi'an China University of Chinese Academy of Sciences Beijing China

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POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Roadmap Update 38

POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Roadm...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Olinto, Angela V. Adams, J.H. Aloisio, R. Anchordoqui, L.A. Anzalone, A. Bagheri, M. Barghini, D. Battisti, M. Bergman, D.R. Bertaina, M.E. Bertone, P.F. Bisconti, F. Bustamante, M. Cafagna, F. Caruso, R. Casolino, M. Černý, K. Christl, M.J. Cummings, A.L. De Mitri, I. Diesing, R. Engel, R. Eser, J.B. Fang, K. Fenu, F. Filippatos, G. Gazda, E. Guépin, C. Haungs, A. Hays, E.A. Judd, E.G. Klimov, P. Krizmanic, J.F. Kungel, V. Kuznetsov, E. Mackovjak, Š. Mandát, D. Marcelli, L. McEnery, J. Medina-Tanco, G. Merenda, K.-D. Meyer, S.S. Mitchell, J.W. Miyamoto, H. Nachtman, J.M. Neronov, A. Oikonomou, F. Olinto, A.V. Onel, Y. Osteria, G. Otte, A.N. Parizot, E. Paul, T.C. Pech, M. Perkins, J.S. Picozza, P. Piotrowski, L.W. Plebaniak, Z. Prévôt, G. Reardon, P. Reno, M.H. Ricci, M. Romero Matamala, O. Sarazin, F. Schovánek, P. Scotti, V. Shinozaki, K. Soriano, J.F. Stecker, F. Takizawa, Y. Unger, M. Venters, T.M. Wiencke, L. Winn, D. Young, R.M. Zotov, M. Abe, S. Allard, D. Alldredge, P. Anchordoqui, L. Anzalone, A. Arnone, E. Bagheri, M. Baret, B. Barghini, D. Battisti, M. Bellotti, R. Belov, A.A. Bertaina, M. 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. Cassardo, C. Castellina, A. 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. Ferrarese, S. 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. López Martínez, F. 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. The University of Chicago Department of Astronomy & Astrophysics 5640 South Ellis Avenue ChicagoIL United States University of Alabama in Huntsville HuntsvilleAL United States Gran Sasso Science Institute L’Aquila Italy City University of New York Lehman College NY United States Istituto Nazionale di Astrofisica INAF IASF Palermo Italy Istituto Nazionale di Fisica Nucleare Catania Italy Georgia Institute of Technology AtlantaGA United States Universita’ di Torino Torino Italy University of Utah Salt Lake CityUT United States NASA Marshall Space Flight Center HuntsvilleAL United States Istituto Nazionale di Fisica Nucleare Sezione di Torino Italy Niels Bohr Institute University of Copenhagen Copenhagen Denmark Istituto Nazionale di Fisica Nucleare Bari Italy Universita’ di Catania Catania Italy Istituto Nazionale di Fisica Nucleare Sezione di Roma Tor Vergata Italy Università di Roma Tor Vergata Roma Italy RIKEN Wako Japan Joint Laboratory of Optics Faculty of Science Palacký University Olomouc Czech Republic Pennsylvania State University PA United States The University of Chicago ChicagoIL United States Karlsruhe Institute of Technology Karlsruhe Germany University of Wisconsin MadisonWI United States Agenzia Spaziale Italiana Via del Politecnico Roma00133 Italy Colorado School of Mines GoldenCO United States Laboratoire Univers et Particules de Montpellier Montpellier France NASA Goddard Space Flight Center GreenbeltMD United States Space Sciences Laboratory University of California BerkeleyCA United States Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia Institute of Experimental Physics Slovak Academy of Sciences Kosice Slovakia Institute of Physics The Czech Academy of Sciences Prague Czech Republic Instituto de Ciencias Nucleares UNAM CDMX Mexico University of Iowa Iowa CityIA United States University of Geneva Geneva Switzerland Université de Paris CNRS Astroparticule et Cosmol

The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) was designed as a NASA Astrophysics probe-class mission to identify the sources of ultrahigh energy cosmic rays (UHECRs) and observe cosmic neutrinos from extremely energetic transient sources. POEMMA consists of two identical spacecraft flying in a loose formation at 525 km altitude oriented to view a common atmospheric volume and to provide full-sky coverage for both types of messengers. Each spacecraft hosts a wide field of view Schmidt telescope with a hybrid focal plane optimized to observe both the UV fluorescence signal from extensive air showers (EASs) and the optical Cherenkov signals from EASs. When in stereo close to nadir mode, POEMMA can measure the spectrum, composition, and full-sky distribution of the UHECRs above 20 EeV and be sensitive to UHE neutrinos. When pointing just below the Earth’s limb, POEMMA will be sensitive to cosmic tau neutrinos above 20 PeV by observing the Cherenkov radiation of EASs produced by upward-moving tau decays, induced from tau neutrino interactions in the Earth. POEMMA is designed to quickly re-orient to follow a Target-of-Opportunity (ToO) neutrino transient from astrophysical sources with exceptional sensitivity to neutrinos from both short-duration transients, such as short-gamma-ray bursts (sGRBs), and long-duration sources, such as binary neutron star (BNS) mergers. Here we review the POEMMA mission and discuss the recent progress towards its technical readiness provided by the Mini-EUSO and EUSO-SPB2 missions and the forthcoming Terzina and POEMMA-Balloon-Radio missions. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： NASA

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Machine Learning for Mini-EUSO Telescope data Analysis 38

Machine Learning for Mini-EUSO Telescope Data Analysis

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38th International Cosmic Ray Conference, ICRC 2023

作者： Bertaina, Mario Zotov, Mikhail Anzhiganov, Dmitry Barghini, Dario Blaksley, Carl Coretti, Antonio Giulio Kryazhenkov, Aleksandr Montanaro, Antonio Olivi, Leonardo 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. Dipartimento di Fisica Università di Torino Torino Italy INFN Sezione di Torino Torino Italy Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University Moscow Russia Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow State University Moscow Russia INAF Osservatorio astrofisico di Torino Torino Italy Department of Electronics and Telecommunications Polytechnic University of Turin Corso Duca degli Abruzzi 24 Turin10129 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 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 Universi

Neural networks as well as other methods of machine learning (ML) are known to be highly efficient in different classification tasks, including classification of images and videos. Mini-EUSO is a wide-field-of-view imaging telescope that operates onboard the International Space Station since 2019 collecting data on miscellaneous processes that take place in the atmosphere of Earth in the UV range. Here we briefly present our results on the development of ML-based approaches for recognition and classification of track-like signals in the Mini-EUSO data, among them meteors, space debris and signals the light curves and kinematics of which are similar to those expected from extensive air showers generated by ultra-high-energy cosmic rays. We show that even simple neural networks demonstrate impressive performance in solving these tasks. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

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Search for the doubly charmed baryon ?cc+

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science China(Physics,Mechanics & Astronomy) 2021年第10期Mechanics & Astronomy) .卷 6-17页

作者： R. Aaij C. Abellán Beteta T. Ackernley B. Adeva M. Adinolfi H. Afsharnia C. A. Aidala S. Aiola Z. Ajaltouni S. Akar J. Albrecht F. Alessio M. Alexander A. Alfonso Albero Z. Aliouche G. Alkhazov P. Alvarez Cartelle S. Amato Y. Amhis L. An L. Anderlini A. Andreianov M. Andreotti F. Archilli A. Artamonov M. Artuso K. Arzymatov E. Aslanides M. Atzeni B. Audurier S. Bachmann M. Bachmayer J. J. Back P. Baladron Rodriguez V. Balagura W. Baldini J. Baptista Leite R. J. Barlow S. Barsuk W. Barter M. Bartolini F. Baryshnikov J. M. Basels G. Bassi B. Batsukh A. Battig A. Bay M. Becker F. Bedeschi I. Bediaga A. Beiter V. Belavin S. Belin V. Bellee K. Belous I. Belov I. Belyaev G. Bencivenni E. Ben-Haim A. Berezhnoy R. Bernet D. Berninghoff H. C. Bernstein C. Bertella A. Bertolin C. Betancourt F. Betti I. Bezshyiko S. Bhasin J. Bhom L. Bian M. S. Bieker S. Bifani P. Billoir M. Birch F. C. R. Bishop A. Bitadze A. Bizzeti M. Bj?rn M. P. Blago T. Blake F. Blanc S. Blusk D. Bobulska J. A. Boelhauve O. Boente Garcia T. Boettcher A. Boldyrev A. Bondar N. Bondar S. Borghi M. Borisyak M. Borsato J. T. Borsuk S. A. Bouchiba T. J. V. Bowcock A. Boyer C. Bozzi M. J. Bradley S. Braun A. Brea Rodriguez M. Brodski J. Brodzicka A. Brossa Gonzalo D. Brundu A. Buonaura C. Burr A. Bursche A. Butkevich J. S. Butter J. Buytaert W. Byczynski S. Cadeddu H. Cai R. Calabrese L. Calefice L. Calero Diaz S. Cali R. Calladine M. Calvi M. Calvo Gomez P. Camargo Magalhaes P. Campana A. F. Campoverde Quezada S. Capelli L. Capriotti A. Carbone G. Carboni R. Cardinale A. Cardini I. Carli P. Carniti L. Carus K. Carvalho Akiba A. Casais Vidal G. Casse M. Cattaneo G. Cavallero S. Celani J. Cerasoli A. J. Chadwick M. G. Chapman M. Charles P. Charpentier G. Chatzikonstantinidis C. A. Chavez Barajas M. Chefdeville C. Chen S. Chen A. Chernov V. Chobanova S. Cholak M. Chrzaszcz A. Chubykin V. Chulikov P. Ciambrone M. F. Cicala X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Clif J. Closier J. L. Cobbledick V. Coco J. A. B. Coelho J. Cogan E. Cogneras L. Nikhef National Institute for Subatomic Physics Physik-Institut Universit?t Zürich Oliver Lodge Laboratory University of Liverpool Instituto Galego de Física de Altas Enerxías (IGFAE) Universidade de Santiago de Compostela H.H. Wills Physics Laboratory University of Bristol Université Clermont Auvergne University of Michigan Ann Arbor United States INFN Sezione di Milano University of Cincinnati Fakult?t Physik Technische Universit?t Dortmund European Organization for Nuclear Research (CERN) School of Physics and Astronomy University of Glasgow ICCUB Universitat de Barcelona Department of Physics and Astronomy University of Manchester Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI) Cavendish Laboratory University of Cambridge Universidade Federal do Rio de Janeiro (UFRJ) Université Paris-Saclay INFN Sezione di Firenze INFN Sezione di Ferrara Physikalisches Institut Ruprecht-Karls-Universit?t Heidelberg Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI) Syracuse University Yandex School of Data Analysis Aix Marseille Univ Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Institute of Physics Ecole Polytechnique Fédérale de Lausanne (EPFL) Department of Physics University of Warwick Centro Brasileiro de Pesquisas Físicas (CBPF) Imperial College London INFN Sezione di Genova National University of Science and Technology “MISIS” I. Physikalisches Institut RWTH Aachen University INFN Sezione di Pisa INFN Sezione di Cagliari Institute of Nuclear Physics Moscow State University (SINP MSU) Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI) INFN Laboratori Nazionali di Frascati LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité Universita degli Studi di Padova Universita e INFN Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences School of Physics and Technology Wuhan University University of Birmingham Università di Modena e Reggio Emilia Department of Physics U

A search for the doubly charmed baryon ?cc+with the decay mode ?cc+→Ξc+K-π+is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb-1. No significant signal is observed within the invariant mass range of 3.6 to 4.0 GeV/c2. Upper limits are set on the ratio R of the production cross-section times the total branching fraction of the ?cc+→Ξc+K-π+decay with respect to the Ξcc++→Λc+K-π+π+decay. Upper limits at 95% credibility level for R in the range 0.005 to 0.11 are obtained for diferent hypotheses on the ?cc+mass and lifetime in the rapidity range from 2.0 to 4.5 and transverse momentum range from 4 to 15 GeV/c.

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Coherent photoproduction of low-pT charmonium in peripheral heavy ion collisions within the color dipole model

arXiv

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arXiv 2021年

作者： Yu, Gongming Cai, Yanbing Fu, Yongping Yang, Haitao Gao, Quangui Hu, Qiang Hu, Liyuan Li, Wei Song, Yushou Fundamental Science on Nuclear Safety and Simulation Technology Laboratory Harbin Engineering University Harbin150000 China Guizhou Key Laboratory in Physics and Related Areas Guizhou Key Laboratory of Big Data Statistic Analysis Guizhou University of Finance and Economics Guiyang550025 China Department of Physics West Yunnan University Lincang677000 China Department of Physics Zhaotong University Zhaotong657000 China Department of Physics Yuxi Normal University Yuxi653100 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou730000 China

We calculate the centrality dependence for coherent photoproduction of very low-pT J/ψ at Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) energies within the impact parameter dependent saturated color dipole model. By using the large equivalent photon fluxes, we present the differential cross section of very low-pT J/ψ produced by coherent photonuclear in peripheral heavy-ion collisions. The numerical results demonstrate that our calculation are agree with J/ψ data in peripheral heavy ion collisions at Relativistic Heavy Ion Collider (RHIC) energies. © 2021, CC BY.

关键词： Colliding beam accelerators

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Vaccination compartmental epidemiological models for the delta and omicron SARS-CoV-2 variants

arXiv

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arXiv 2023年

作者： Cuevas-Maraver, J. Kevrekidis, P.G. Chen, Q.Y. Kevrekidis, Jesus A. Drossinos, Y. Grupo de Física No Lineal Departamento de Física Aplicada I Universidad de Sevilla Escuela Politécnica Superior C/ Virgen de África 7 Sevilla41011- Spain Edificio Celestino Mutis. Avda. Reina Mercedes s/n Sevilla41012- Spain Department of Mathematics and Statistics University of Massachusetts Amherst AmherstMA01003 United States Department of Applied Mathematics and Statistics Johns Hopkins University BaltimoreMD21218 United States Los Alamos National Laboratory Los AlamosNM United States Mathematical Institute for Data Science Johns Hopkins University BaltimoreMD United States Thermal Hydraulics & Multiphase Flow Laboratory Institute of Nuclear & Radiological Sciences and Technology Energy & Safety N.C.S.R. Demokritos Agia ParaskeviGR-15341 Greece

We explore the inclusion of vaccination in compartmental epidemiological models concerning the delta and omicron variants of the SARS-CoV-2 virus that caused the COVID-19 pandemic. We expand on our earlier compartmental-model work by incorporating vaccinated populations. We present two classes of models that differ depending on the immunological properties of the variant. The first one is for the delta variant, where we do not follow the dynamics of the vaccinated individuals since infections of vaccinated individuals were rare. The second one for the far more contagious omicron variant incorporates the evolution of the infections within the vaccinated cohort. We explore comparisons with available data involving two possible classes of counts, fatalities and hospitalizations. We present our results for two regions, Andalusia and Switzerland (including the Principality of Liechtenstein), where the necessary data are available. In the majority of the considered cases, the models are found to yield good agreement with the data and have a reasonable predictive capability beyond their training window, rendering them potentially useful tools for the interpretation of the COVID-19 and further pandemic waves, and for the design of intervention strategies during these waves. Copyright © 2023, The Authors. All rights reserved.

关键词： Coronavirus

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Overview and First Results of EUSO-SPB2 38

Overview and First Results of EUSO-SPB2

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38th International Cosmic Ray Conference, ICRC 2023

作者： Eser, Johannes Olinto, Angela V. 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. 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. The University of Chicago Department of Astronomy & Astrophysics 5640 South Ellis Avenue ChicagoIL United States Colorado School of Mines Department of Physics 1523 Illinois Street GoldenCO United States 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 Astronomical Observatory Mitaka Japan Hokkaido University Sapporo Japan Nihon University Chiyoda Tokyo Japan RIKEN Wako Japan Korea Astronomy and Space Science Institute Korea Republic of Sungkyunkwan U

Observing ultra-high energy cosmic rays (UHECR) and very high energy (VHE) neutrinos from space is a promising way to measure their extremely low fluxes by significantly increasing the observed volume. The Extreme Universe Space Observatory on a Super Pressure Balloon 2 (EUSO-SPB2), the next, most advanced pathfinder for such a mission, was launched May 13th 2023 from Wanaka New Zealand. The pioneering EUSO-SPB2 payload flew a Fluorescence Telescope (FT) with a PMT camera pointed in nadir to record fluorescence light from cosmic ray extensive air shower (EAS) with energies above 1 EeV, and a Cherenkov telescope (CT) with a silicon photomultiplier focal surface for observing Cherenkov emission of cosmic ray EAS with energies above 1 PeV with an above-the-limb geometry and of PeV-scale EAS initiated by neutrino-sourced tau decay. As the CT is a novel instrument, optical background measurements for space neutrino observation are an important goal of the mission. Any data collected during the mission will influence and improve the development of a space-based multi-messenger observatory such as the Probe of Extreme Multi-Messenger Astrophysics (POEMMA). We present an overview of the EUSO-SPB2 mission and its science goals and summarize results as available, from the 2023 flight. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

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INTRODUCTION

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Bulletin of the American Meteorological Society 2024年第8期105卷 S1-S11页

作者： Boyer, T. Blunden, J. Dunn, R.J.H. NOAA/NESDIS National Centers for Environmental Information Silver Spring Maryland NOAA/NESDIS National Centers for Environmental Information Asheville North Carolina Met Office Hadley Centre Exeter United Kingdom European Centre for Medium-Range Weather Forecasts Reading United Kingdom University of Maryland College Park Maryland Scripps Institution of Oceanography University of California San Diego La Jolla California NOAA/NWS National Centers for Environmental Prediction Climate Prediction Center College Park Maryland Brandenburg University of Technology (BTU) Cottbus-Senftenberg Germany Servicio Meteorológico Nacional Buenos Aires Argentina NOAA/OAR Physical Sciences Laboratory Boulder Colorado European Centre for Medium-Range Weather Forecasts Bonn Germany Center for Geophysical Research and School of Physics University of Costa Rica San José Costa Rica Department of Meteorology and National Centre for Earth Observation University of Reading Reading United Kingdom Centro Nacional de Monitoramento e Alertas de Desastres Naturais CEMADEN São Paulo Brazil Université Grenoble Alpes Institut des Géosciences de l’Environnement IRD CNRS Grenoble INP Grenoble France Hampton University Hampton Virginia Seychelles Meteorological Authority Mahe Seychelles Section for Glaciers Ice and Snow Norwegian Water Resources and Energy Directorate Oslo Norway National Research Institute for Agriculture Food and Environment (INRAE) CARRTEL Université Savoie Mont Blanc Thonon les Bains France Graduate School of Agriculture Osaka Metropolitan University Sakai Japan Science Faculty Universidad Nacional de Colombia Bogotá Colombia University of Bremen Bremen Germany NOAA Global Monitoring Laboratory Boulder Colorado Servicio Nacional de Meteorología e Hidrología del Perú Lima Perú Centro de Investigaciones sobre Desertificación – Spanish National Research Council (CSIC-UV-GVA) Valencia Spain Hydro-Climate Extremes Lab (H-CEL) Ghent University Ghent Belgium Department o

In 2023, La Niña conditions that generally prevailed in the eastern Pacific Ocean from mid-2020 into early 2023 gave way to a strong El Niño by October. Atmospheric concentrations of Earth’s major greenhouse gases—carbon dioxide, methane, and nitrous oxide—all increased to record-high levels. The annual global average carbon dioxide concentration in the atmosphere rose to 419.3±0.1 ppm, which is 50% greater than the pre-industrial level. The growth from 2022 to 2023 was 2.8 ppm, the fourth highest in the record since the 1960s. The combined short-term effects of El Niño and the long-term effects of increasing levels of heat-trapping gases in the atmosphere contributed to new records for many essential climate variables reported here. The annual global temperature across land and oceans was the highest in records dating as far back as 1850, with the last seven months (June–December) having each been record warm. Over land, the globally averaged temperature was also record high. Dozens of countries reported record or near-record warmth for the year, including China and continental Europe as a whole (warmest on record), India and Russia (second warmest), and Canada (third warmest). Intense and widespread heatwaves were reported around the world. In Vietnam, an all-time national maximum temperature record of 44.2°C was observed at Tuong Duong on 7 May, surpassing the previous record of 43.4°C at Huong Khe on 20 April 2019. In Brazil, the air temperature reached 44.8°C in Araçuaí in Minas Gerais on 20 November, potentially a new national record and 12.8°C above normal. The effect of rising temperatures was apparent in the cryosphere, where snow cover extent by June 2023 was the smallest in the 56-year record for North America and seventh smallest for the Northern Hemisphere overall. Heatwaves contributed to the greatest average mass balance loss for Alpine glaciers around the world since the start of the record in 1970. Due to rapid volume loss beginning in 2021, St. A

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