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arXiv 2020年

作者： Pang, Jin-Yi Wu, Jia-Jun Geng, Li-Sheng College of Science University of Shanghai for Science and Technology Shanghai200093 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100049 China School of Physics Beihang University Beijing100191 China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing100191 China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Medicine and Engineering Beihang University Beijing100191 China School of Physics and Microelectronics Zhengzhou University ZhengzhouHenan450001 China

The DDK 3-body system is supposed to be bound due to the strongly attractive interaction between the D meson and the K meson in the isospin zero channel. The minimum quark content of this 3-body bound state is ccq¯s¯ with q = u, d. It will be an explicitly exotic tetraquark state once discovered. In order to confirm the phenomenological study of the DDK system, we can refer to lattice QCD as a powerful theoretical tool parallel to the experiment measurement. In this paper, a 3-body quantization condition scheme is derived via the non-relativistic effective theory and the particle-dimer picture in finite volume. Lattice spectrum of this 3-body system is calculated within the existing model inputs. The spectrum shows various interesting properties of the DDK system, and it may reveal the nature of the D∗(2317). This predicated spectrum is expected to be tested in future lattice simulations. Copyright © 2020, The Authors. All rights reserved.

关键词： Hadrons

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Beam-energy dependence of the relativistic retardation effects of electrical fields on the π−/π+ ratio in heavy-ion collisions

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Physical Review C 2018年第2期98卷 024618-024618页

作者： Gao-Feng Wei Gao-Chan Yong Li Ou Qi-Jun Zhi Zheng-Wen Long Xiao-Hua Zhou Shaanxi Engineering Research Center of Controllable Neutron Source Xijing University Xian 710123 China School of Mechanical and Material Engineering Xi'an University of Arts and Sciences Xi'an 710065 China School of Physics and Electronic Science Guizhou Normal University Guiyang 550001 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China College of Physics and Technology Guangxi Normal University Guilin 541004 China Guangxi Key Laboratory Breeding Base of Nuclear Physics and Technology Guangxi Normal University Guilin 541004 China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal University Guiyang 550001 China College of Physics Guizhou University Guiyang 550025 China

In this article we investigate the beam-energy dependence of relativistic retardation effects of electrical fields on the single and double π−/π+ ratios in three heavy-ion reactions with an isospin- and momentum-dependent transport model IBUU11. With the beam energy increasing from 200 to 400 MeV/nucleon, effects of the relativistically retarded electrical fields on the π−/π+ ratio are found to increase gradually from negligible to considerably significant as expected; it is, however, an interesting observation that the relativistic retardation effects of electrical fields on the π−/π+ ratio become gradually insignificant as the beam energy further increases from 400 to 800 MeV/nucleon. That is to say, with the beam energy increasing, the competition of enhanced anisotropic features of retarded electrical fields and reduced duration time of the reactions gets effects of the relativistically retarded electrical fields on the π−/π+ ratio to be maximum around 400 MeV/nucleon. Therefore, the relativistic retardation effects of electrical fields should be carefully considered in heavy-ion collisions at intermediate energy especially around 400 MeV/nucleon when using the π−/π+ ratio as the probe of nuclear symmetry energy. Moreover, we also investigate the isospin dependence of relativistic retardation effects of electrical fields on the π−/π+ ratio in two isobar reaction systems of Ru96+Ru96 and Zr96+Zr96 at the beam energies from 200 to 800 MeV/nucleon. It is shown that the relativistic retardation effects of electrical fields on the π−/π+ ratio are independent of the isospin of reaction. Furthermore, we also examine the double π−/π+ ratio in reactions of Zr96+Zr96 over Ru96+Ru96 at the beam energies from 200 to 800 MeV/nucleon with the static field and retarded field, respectively. It is shown that the double π−/π+ ratio from two reactions is still an effective observable of symmetry energy without the interference of electrical field due to using the relativistic calc

关键词： Low & intermediate energy heavy-ion reactions nuclear many-body theory nuclear reactions Nucleon-nucleon interactions Symmetry energy

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Measurement of ω meson production in pp and p–Pb collisions at √sNN = 5.02 TeV

arXiv

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arXiv 2025年

作者： Acharya, S. Agarwal, A. Rinella, G. Aglieri Aglietta, L. Agnello, M. Agrawal, N. Ahammed, Z. Ahmad, S. Ahn, S.U. Ahuja, I. Akindinov, A. Akishina, V. Al-Turany, M. Aleksandrov, D. Alessandro, B. Alfanda, H.M. Molina, R. Alfaro Ali, B. Alici, A. Alizadehvandchali, N. Alkin, A. Alme, J. Alocco, G. Alt, T. Altamura, A.R. Altsybeev, I. Alvarado, J.R. Anaam, M.N. Andrei, C. Andreou, N. Andronic, A. Andronov, E. Anguelov, V. Antinori, F. Antonioli, P. Apadula, N. Appelshäuser, H. Arata, C. Arcelli, S. Arnaldi, R. Arneiro, J.G.M.C.A. Arsene, I.C. Arslandok, M. Augustinus, A. Averbeck, R. Averyanov, D. Azmi, M.D. Baba, H. Badalà, A. Bae, J. Bae, Y. Baek, Y.W. Bai, X. Bailhache, R. Bailung, Y. Bala, R. Baldisseri, A. Balis, B. Bangalia, S. Banoo, Z. Barbasova, V. Barile, F. Barioglio, L. Barlou, M. Barman, B. Barnaföldi, G.G. Barnby, L.S. Barreau, E. Barret, V. Barreto, L. Barth, K. Bartsch, E. Bastid, N. Basu, S. Batigne, G. Battistini, D. Batyunya, B. Bauri, D. Alba, J.L. Bazo Bearden, I.G. Becht, P. Behera, D. Belikov, I. Hechavarria, A.D.C. Bell Bellini, F. Bellwied, R. Belokurova, S. Beltran, L.G.E. Beltran, Y.A.V. Bencedi, G. Bensaoula, A. Beole, S. Berdnikov, Y. Berdnikova, A. Bergmann, L. Bernardinis, L. Betev, L. Bhaduri, P.P. Bhasin, A. Bhattacharjee, B. Bhattarai, S. Bianchi, L. Bielčík, J. Bielčíková, J. Bigot, A.P. Bilandzic, A. Binoy, A. Biro, G. Biswas, S. Bize, N. Blair, J.T. Blau, D. Blidaru, M.B. Bluhme, N. Blume, C. Bock, F. Bodova, T. Bok, J. Boldizsár, L. Bombara, M. Bond, P.M. Bonomi, G. Borel, H. Borissov, A. Carcamo, A.G. Borquez Botta, E. Bouziani, Y.E.M. Brandibur, D.C. Bratrud, L. Braun-Munzinger, P. Bregant, M. Broz, M. Bruno, G.E. Buchakchiev, V.D. Buckland, M.D. Budnikov, D. Buesching, H. Bufalino, S. Buhler, P. Burmasov, N. Buthelezi, Z. Bylinkin, A. Bysiak, S.A. Noris, J.C. Cabanillas Cabrera, M.F.T. Caines, H. Caliva, A. Villar, E. Calvo Camacho, J.M.M. Camerini, P. Camerlingo, M.T. Max-Planck-Institut fur Physik Munich Germany Bologna Italy Dipartimento DET del Politecnico di Torino Turin Italy Department of Applied Physics Aligarh Muslim University Aligarh India Institute of Theoretical Physics University of Wroclaw Poland Facultad de Ciencias Universidad Nacional Autónoma de México Mexico City Mexico Foundation Yerevan Armenia AGH University of Krakow Cracow Poland Bogolyubov Institute for Theoretical Physics National Academy of Sciences of Ukraine Kiev Ukraine Kolkata India California Polytechnic State University San Luis ObispoCA United States Central China Normal University Wuhan China Havana Cuba Mérida Mexico City Mexico Chicago State University ChicagoIL United States China Nuclear Data Center China Institute of Atomic Energy Beijing China China University of Geosciences Wuhan China Chungbuk National University Cheongju Korea Republic of Comenius University Bratislava Faculty of Mathematics Physics and Informatics Bratislava Slovakia Creighton University OmahaNE United States Department of Physics Aligarh Muslim University Aligarh India Department of Physics Pusan National University Pusan Korea Republic of Department of Physics Sejong University Seoul Korea Republic of Department of Physics University of California BerkeleyCA United States Department of Physics University of Oslo Oslo Norway Department of Physics and Technology University of Bergen Bergen Norway Dipartimento di Fisica Università di Pavia Pavia Italy Dipartimento di Fisica dell’Università and Sezione INFN Cagliari Italy Dipartimento di Fisica dell’Università and Sezione INFN Trieste Italy Dipartimento di Fisica dell’Università and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Catania Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Padova Italy Dipartimento di Fisica E.R.

We present the measurement of the pT-differential production cross section of ω mesons in pp and p–Pb collisions at √sNN = 5.02 TeV at midrapidity by ALICE. In addition, the first measurement of the nuclear modification factor RpPb for ω mesons at LHC energies is presented, complementing the existing measurements of lighter neutral mesons such as the π0 and η. Within the measured pT-range, the RpPb of ω mesons shows no cold nuclear matter effects within the uncertainties, consistent with previous measurements at lower energies. The ω/π0 ratio is presented for both collision systems, showing no collision system dependence within the uncertainties. The comparison to previously published ω/π0 ratios at lower and higher collision energies in pp collisions suggests a decreasing trend of the ratio above pT = 4 GeV/c with increasing collision energy. The data in both collision systems are compared to predictions from PYTHIA 8, EPOS LHC and DPMJET event generators, revealing significant shortcomings in these models’ ability to describe the production of ω mesons. © 2025, CC BY.

关键词： Bosons

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Final results on the decay half-life limit of Mo from the CUPID-Mo experiment

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The European Physical Journal C 2022年第11期82卷 1-20页

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. Chapellier, M. Chiesa, D. Dafinei, I. Danevich, F. A. De Jesus, M. de Marcillac, P. 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. Johnston, J. Juillard, A. Khalife, H. Kleifges, M. Kobychev, V. V. Kolomensky, Yu. G. Konovalov, S. I. Loaiza, P. Ma, L. Makarov, E. 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. Singh, V. Tomei, C. Tretyak, V. I. Umatov, V. I. Vagneron, L. Velázquez, M. Welliver, B. Winslow, L. Xue, M. Yakushev, E. Zarytskyy, M. Zolotarova, A. S. Univ Lyon Université Lyon 1 CNRS/IN2P3 IP2I-Lyon Villeurbanne France National Research Centre Kurchatov Institute Institute of Theoretical and Experimental Physics Moscow Russia Dipartimento di Fisica Sapienza Università di Roma Rome Italy INFN Sezione di Roma Rome Italy IRFU CEA Université Paris-Saclay Gif-sur-Yvette France INFN Laboratori Nazionali del Gran Sasso Assergi Italy Department of Physics University of California Berkeley USA Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France Nikolaev Institute of Inorganic Chemistry Novosibirsk Russia Dipartimento di Fisica Università di Milano-Bicocca Milan Italy INFN Sezione di Milano-Bicocca Milan Italy Institute for Nuclear Research Kyiv Ukraine Institute for Astroparticle Physics Karlsruhe Institute of Technology Karlsruhe Germany Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley USA Gran Sasso Science Institute L’Aquila Italy Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) Fudan University Shanghai People’s Republic of China Massachusetts Institute of Technology Cambridge USA Institute for Data Processing and Electronics Karlsruhe Institute of Technology Karlsruhe Germany Department of Nuclear Engineering University of California Berkeley USA Physik Department Technische Universität München Garching Germany Department of Modern Physics University of Science and Technology of China Hefei People’s Republic of China LSM Laboratoire Souterrain de Modane Modane France Laboratory of Nuclear Problems JINR Dubna Russia Department of Physics and Astronomy Northwestern University Evanston USA Université Grenoble Alpes CNRS Grenoble INP SIMAP Saint Martin d’Héres France

The CUPID-Mo experiment to search for 0 $$\nu \beta \beta $$ decay in $$^{100}$$ Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator for CUPID, a next generation 0 $$\nu \beta \beta $$ decay experiment. CUPID-Mo was comprised of 20 enriched $$\hbox {Li}_{{2}}$$ $$^{100}$$ $$\hbox {MoO}_4$$ scintillating calorimeters, each with a mass of $$\sim 0.2$$ kg, operated at $$\sim 20$$ mK. We present here the final analysis with the full exposure of CUPID-Mo ( $$^{100}$$ Mo exposure of 1.47 $$\hbox {kg} \times \hbox {year}$$ ) used to search for lepton number violation via 0 $$\nu \beta \beta $$ decay. We report on various analysis improvements since the previous result on a subset of data, reprocessing all data with these new techniques. We observe zero events in the region of interest and set a new limit on the $$^{100}$$ Mo 0 $$\nu \beta \beta $$ decay half-life of $$T_{1/2}^{0\nu }$$ $$> {1.8}\times 10^{24}$$ year (stat. + syst.) at 90% CI. Under the light Majorana neutrino exchange mechanism this corresponds to an effective Majorana neutrino mass of $$\left$$ $$<~{(0.28{-}0.49)} $$ eV, dependent upon the nuclear matrix element utilized.

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Correlation-aware Cross-modal Attention Network for Fashion Compatibility Modeling in UGC Systems

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ACM Transactions on Multimedia Computing, Communications, and Applications 1000年

作者： Kai Cui Shenghao Liu Wei Feng Xianjun Deng Liangbin Gao Minmin Cheng Hongwei Lu Laurence T. Yang Hubei Key Laboratory of Distributed System Security Hubei Engineering Research Center on Big Data Security School of Cyber Science and Engineering Huazhong University of Science and Technology China China Nuclear Power Operation Technology Corporation Ltd. China

Empowered by the continuous integration of social multimedia and artificial intelligence, the application scenarios of information retrieval (IR) progressively tend to be diversified and personalized. Currently, User-Generated Content (UGC) systems have great potential to handle the interactions between large-scale users and massive media contents. As an emerging multimedia IR, Fashion Compatibility Modeling (FCM) aims to predict the matching degree of each given outfit and provide complementary item recommendation for user queries. Although existing studies attempt to explore the FCM task from a multimodal perspective with promising progress, they still fail to fully leverage the interactions between multimodal information or ignore the item-item contextual connectivities of intra-outfit. In this paper, a novel fashion compatibility modeling scheme is proposed based on Correlation-aware Cross-modal Attention Network. To better tackle these issues, our work mainly focuses on enhancing comprehensive multimodal representations of fashion items by integrating the cross-modal collaborative contents and uncovering the contextual correlations. Since the multimodal information of fashion items can deliver various semantic clues from multiple aspects, a modality-driven collaborative learning module is presented to explicitly model the interactions of modal consistency and complementarity via a co-attention mechanism. Considering the rich connections among numerous items in each outfit as contextual cues, a correlation-aware information aggregation module is further designed to adaptively capture significant intra-correlations of item-item for characterizing the content-aware outfit representations. Experiments conducted on two real-world fashion datasets demonstrate the superiority of our approach over state-of-the-art methods.

关键词： User-Generated Contents fashion intelligent analysis complementary compatibility modeling multimodal representation learning correlation-aware integration strategy

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Corrigendum to “Properties and thermal neutron areal transmittance of a B 4 C filled thermoplastic elastomer based rubber composite” [Nucl. Mater. Energy 31 (2022) 101193]

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nuclear Materials and Energy 2022年 32卷

作者： Boyu Wang Tianyi Qiu Jinnan Yin Menghuai Wang Shixin Ma Qi Wang Lin Yuan Qinglong Fang Guoqing Zhang Yang Liu School of Science Xi’an Polytechnic University Xi’an 710600 Shaanxi China Xi’an Key Laboratory of Nuclear Protection Textile Equipment Technology Xi’an 710600 Shaanxi China Engineering Research Center of Flexible Radiation Protection Technology Universities of Shannxi Province Xi’an 710600 Shaanxi China School of National Defense Science and Technology Southwest University of Science and Technology Mianyang 621010 Sichuan China Science and Technology on Nuclear Data Laboratory China Institute of Atomic Energy Beijing 102413 China

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Artificial Intelligence for the Electron Ion Collider (AI4EIC)

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Computing and Software for Big science 2024年第1期8卷 1-21页

作者： Allaire, C. Ammendola, R. Aschenauer, E.-C. Balandat, M. Battaglieri, M. Bernauer, J. Bondì, M. Branson, N. Britton, T. Butter, A. Chahrour, I. Chatagnon, P. Cisbani, E. Cline, E.W. Dash, S. Dean, C. Deconinck, W. Deshpande, A. Diefenthaler, M. Ent, R. Fanelli, C. Finger, M. Fol, E. Furletov, S. Gao, Y. Giroux, J. Waduge, N. C. Gunawardhana Hassan, O. Hegde, P.L. Hernández-Pinto, R.J. Blin, A. Hiller Horn, T. Huang, J. Jalotra, A. Jayakodige, D. Joo, B. Junaid, M. Kalantarians, N. Karande, P. Kriesten, B. Elayavalli, R. Kunnawalkam Li, Y. Lin, M. Liu, F. Liuti, S. Matousek, G. McEneaney, M. McSpadden, D. Menzo, T. Miceli, T. Mikuni, V. Montgomery, R. Nachman, B. Nair, R.R. Niestroy, J. Oregon, S. A. Ochoa Oleniacz, J. Osborn, J.D. Paudel, C. Pecar, C. Peng, C. Perdue, G.N. Phelps, W. Purschke, M.L. Rajendran, H. Rajput, K. Ren, Y. Renteria-Estrada, D.F. Richford, D. Roy, B.J. Roy, D. Saini, A. Sato, N. Satogata, T. Sborlini, G. Schram, M. Shih, D. Singh, J. Singh, R. Siodmok, A. Stevens, J. Stone, P. Suarez, L. Suresh, K. Tawfik, A.-N. Acosta, F. Torales Tran, N. Trotta, R. Twagirayezu, F.J. Tyson, R. Volkova, S. Vossen, A. Walter, E. Whiteson, D. Williams, M. Wu, S. Zachariou, N. Zurita, P. Université Paris-Saclay CNRS/IN2P3 IJCLAB Orsay 91400 France Sezione di Roma Tor Vergata INFN Rome 00133 Italy Brookhaven National Lab Upton 11973 NY United States Meta Menlo Park 935025 CA United States National Institute for Nuclear Physics Genoa 16146 Italy Center for Frontiers in Nuclear Science Stony Brook University Stony Brook 11790-3800 NY United States Stony Brook University Stony Brook 11794 NY United States National Institute for Nuclear Physics Catania 95125 Italy Drexel University Philadelphia 19104 PA United States Messiah University Mechanicsburg 17055 PA United States Jefferson Lab Newport News 293606 VA United States Laboratory Nuclear and High-Energy Physics CNRS Paris 75005 France University of Michigan Ann Arbor 48104 MI United States National Institute for Nuclear Physics Roma Rome 00185 Italy Indian Institute of Technology Bombay Maharashtra Mumbai 400076 India Massachusetts Institute of Technology Cambridge 021339 MA United States Department of Physics University of Manitoba Winnipeg R3T 2N2 MB Canada William & amp Charles University Faculty of Mathematics and Physics Prague 18000 Czech Republic Accelerators and Beam Physics Group CERN Geneva 1211 Switzerland University of Regina Regina S4S0A2 SK Canada University of Virginia Charlottesville 22904 VA United States University of Victoria Victoria V8P 5C2 Canada Central University of Karnataka Kalaburagi 585367 India Facultad de Ciencias Físico-Matemáticas Universidad Autónoma de Sinaloa Ciudad Universitaria Sinaloa Culiacán 80000 Mexico Institute for Theoretical Physics TübingenUniversity Tübingen 72076 Germany The Catholic University of America Washington 20064 DC United States University of Jammu Jammu and Kashmir Jammu 180006 India Hampton University Hampton 23668 VA United States Oak Ridge National Laboratory Oak Ridge 37830 TN United States Virginia Union University Richmond 23220 VA United States Lawrence Livermore N

The Electron-Ion Collider (EIC), a state-of-the-art facility for studying the strong force, is expected to begin commissioning its first experiments in 2028. This is an opportune time for artificial intelligence (AI) to be included from the start at this facility and in all phases that lead up to the experiments. The second annual workshop organized by the AI4EIC working group, which recently took place, centered on exploring all current and prospective application areas of AI for the EIC. This workshop is not only beneficial for the EIC, but also provides valuable insights for the newly established ePIC collaboration at EIC. This paper summarizes the different activities and R&D projects covered across the sessions of the workshop and provides an overview of the goals, approaches and strategies regarding AI/ML in the EIC community, as well as cutting-edge techniques currently studied in other experiments. © The Author(s) 2024.

关键词： Artificial Intelligence Deep learning EIC ePIC Machine learning Physics QCD

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New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN data Runs

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Physical Review Letters 2022年第1期129卷 011806-011806页

作者： M. Aker D. Batzler A. Beglarian J. Behrens A. Berlev U. Besserer B. Bieringer F. Block S. Bobien B. Bornschein L. Bornschein M. Böttcher T. Brunst T. S. Caldwell R. M. D. Carney S. Chilingaryan W. Choi K. Debowski M. Descher D. Díaz Barrero P. J. Doe O. Dragoun G. Drexlin F. Edzards K. Eitel E. Ellinger R. Engel S. Enomoto A. Felden J. A. Formaggio F. M. Fränkle G. B. Franklin F. Friedel A. Fulst K. Gauda A. S. Gavin W. Gil F. Glück R. Grössle R. Gumbsheimer V. Hannen N. Haußmann K. Helbing S. Hickford R. Hiller D. Hillesheimer D. Hinz T. Höhn T. Houdy A. Huber A. Jansen C. Karl F. Kellerer J. Kellerer M. Kleifges M. Klein C. Köhler L. Köllenberger A. Kopmann M. Korzeczek A. Kovalík B. Krasch H. Krause L. La Cascio T. Lasserre T. L. Le O. Lebeda B. Lehnert A. Lokhov M. Machatschek E. Malcherek M. Mark A. Marsteller E. L. Martin C. Melzer S. Mertens J. Mostafa K. Müller H. Neumann S. Niemes P. Oelpmann D. S. Parno A. W. P. Poon J. M. L. Poyato F. Priester J. Ráliš S. Ramachandran R. G. H. Robertson W. Rodejohann C. Rodenbeck M. Röllig C. Röttele M. Ryšavý R. Sack A. Saenz R. Salomon P. Schäfer L. Schimpf M. Schlösser K. Schlösser L. Schlüter S. Schneidewind M. Schrank A. Schwemmer M. Šefčík V. Sibille D. Siegmann M. Slezák F. Spanier M. Steidl M. Sturm H. H. Telle L. A. Thorne T. Thümmler N. Titov I. Tkachev K. Urban K. Valerius D. Vénos A. P. Vizcaya Hernández C. Weinheimer S. Welte J. Wendel C. Wiesinger J. F. Wilkerson J. Wolf S. Wüstling J. Wydra W. Xu S. Zadoroghny G. Zeller Tritium Laboratory Karlsruhe (TLK) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute for Data Processing and Electronics (IPE) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute for Astroparticle Physics (IAP) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Institute for Nuclear Research of Russian Academy of Sciences 60th October Anniversary Prospect 7a 117312 Moscow Russia Institute for Nuclear Physics University of Münster Wilhelm-Klemm-Strasse 9 48149 Münster Germany Institute of Experimental Particle Physics (ETP) Karlsruhe Institute of Technology (KIT) Wolfgang-Gaede-Strasse 1 76131 Karlsruhe Germany Institute for Technical Physics (ITEP) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany Technische Universität München James-Franck-Strasse 1 85748 Garching Germany Max-Planck-Institut für Physik Föhringer Ring 6 80805 München Germany Department of Physics and Astronomy University of North Carolina Chapel Hill North Carolina 27599 USA Triangle Universities Nuclear Laboratory Durham North Carolina 27708 USA Institute for Nuclear and Particle Astrophysics and Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics Faculty of Mathematics and Natural Sciences University of Wuppertal Gaußstr. 20 42119 Wuppertal Germany Departamento de Química Física Aplicada Universidad Autonoma de Madrid Campus de Cantoblanco 28049 Madrid Spain Center for Experimental Nuclear Physics and Astrophysics and Dept. of Physics University of Washington Seattle Washington 98195 USA Nuclear Physics Institute Czech Academy of Sciences 25068 Řež Czech Republic Laboratory for Nuclear Science Massachusetts Institute of Technology 77 Massachusetts Ave Cambridge Massachus

We report on the direct search for cosmic relic neutrinos using data acquired during the first two science campaigns of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity molecular tritium gas source are analyzed by a high-resolution MAC-E filter around the end point at 18.57 keV. The analysis is sensitive to a local relic neutrino overdensity ratio of η<9.7×1010/α (1.1×1011/α) at a 90% (95%) confidence level with α=1 (0.5) for Majorana (Dirac) neutrinos. A fit of the integrated electron spectrum over a narrow interval around the end point accounting for relic neutrino captures in the tritium source reveals no significant overdensity. This work improves the results obtained by the previous neutrino mass experiments at Los Alamos and Troitsk. We furthermore update the projected final sensitivity of the KATRIN experiment to η<1×1010/α at 90% confidence level, by relying on updated operational conditions.

关键词： Cosmic ray & astroparticle detectors Cosmology Evolution of the Universe Extrasolar neutrino astronomy Nucleus-neutrino interactions Particle interactions Neutrinos Neutrino detectors

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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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Neutron ghost imaging

arXiv

引用

arXiv 2019年

作者： Kingston, Andrew M. Myers, Glenn R. Pelliccia, Daniele Salvemini, Filomena Bevitt, Joseph J. Garbe, Ulf Paganin, David M. Department of Applied Mathematics Research School of Physics and Engineering Australian National University CanberraACT2601 Australia CTLab: National Laboratory for Micro Computed-Tomography Advanced Imaging Precinct Australian National University CanberraACT2601 Australia Instruments & Data Tools Pty Ltd Victoria3178 Australia Australian Centre for Neutron Scattering Australian Nuclear Science and Technology Organisation New Illawarra Rd Lucas HeightsNSW2234 Australia School of Physics and Astronomy Monash University VIC3800 Australia

Ghost imaging is demonstrated using a poly-energetic reactor source of thermal neutrons. The method presented enables position resolution to be incorporated, into a variety of neutron instruments that are not position resolving. In an imaging context, ghost imaging can be beneficial for dose reduction and resolution enhancement. We also demonstrate a super-resolution variant of the method, namely a parallel form of neutron ghost imaging, with the ability to significantly increase the spatial resolution of a pixelated detector such as a CCD or CMOS camera. Extensions of our neutron ghost-imaging protocol are discussed in detail and include neutron ghost tomography, neutron ghost microscopy, dark-field neutron ghost imaging, and isotope-resolved color neutron ghost imaging via prompt-gamma-ray bucket detection. Copyright © 2019, The Authors. All rights reserved.

关键词： Neutrons

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