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arXiv 2022年

作者： Cao, Zhen Aharonian, F. An, Q. Axikegu Bai, L.X. Bai, Y.X. Bao, Y.W. Bastieri, D. Bi, X.J. Bi, Y.J. Cai, J.T. Cao, Zhe Chang, J. Chang, J.F. Chen, E.S. Chen, Liang Chen, Long Chen, M.J. Chen, M.L. Chen, Q.H. Chen, S.H. Chen, S.Z. Chen, T.L. Chen, Y. Cheng, H.L. Cheng, N. Cheng, Y.D. Cui, S.W. Cui, X.H. Cui, Y.D. D'Ettorre Piazzoli, B. Dai, B.Z. Dai, H.L. Dai, Z.G. Danzengluobu Della Volpe, D. Duan, K.K. Fan, J.H. Fan, Y.Z. Fan, Z.X. Fang, J. Fang, K. Feng, C.F. Feng, L. Feng, S.H. Feng, X.T. Feng, Y.L. Gao, B. Gao, C.D. Gao, L.Q. Gao, Q. Gao, W. Gao, W.K. Ge, M.M. Geng, L.S. Gong, G.H. Gou, Q.B. Gu, M.H. Guo, F.L. Guo, J.G. Guo, X.L. Guo, Y.Q. Guo, Y.Y. Han, Y.A. He, H.H. He, H.N. He, S.L. He, X.B. He, Y. Heller, M. Hor, Y.K. Hou, C. Hou, X. Hu, H.B. Hu, Q. Hu, S. Hu, S.C. Hu, X.J. Huang, D.H. Huang, W.H. Huang, X.T. Huang, X.Y. Huang, Y. Huang, Z.C. Ji, X.L. Jia, H.Y. Jia, K. Jiang, K. Jiang, Z.J. Jin, M. Kang, M.M. Ke, T. Kuleshov, D. Levochkin, K. Li, B.B. Li, Cheng Li, Cong Li, F. Li, H.B. Li, H.C. Li, H.Y. Li, J. Li, Jian Li, Jie Li, K. Li, W.L. Li, X.R. Li, Xin Li, Y.Z. Li, Zhe Li, Zhuo Liang, E.W. Liang, Y.F. Lin, S.J. Liu, B. Liu, C. Liu, D. Liu, H. Liu, H.D. Liu, J. Liu, J.L. Liu, J.S. Liu, J.Y. Liu, M.Y. Liu, R.Y. Liu, S.M. Liu, W. Liu, Y. Liu, Y.N. Long, W.J. Lu, R. Luo, Q. Lv, H.K. Ma, B.Q. Ma, L.L. Ma, X.H. Mao, J.R. Masood, A. Min, Z. Mitthumsiri, W. Nan, Y.C. Ou, Z.W. Pang, B.Y. Pattarakijwanich, P. Pei, Z.Y. Qi, M.Y. Qi, Y.Q. Qiao, B.Q. Qin, J.J. Ruffolo, D. Sáiz, A. Shao, C.Y. Shao, L. Shchegolev, O. Sheng, X.D. Shi, J.Y. Song, H.C. Stenkin, Yu.V. Stepanov, V. Su, Y. Sun, Q.N. Sun, X.N. Sun, Z.B. Tam, P.H.T. Tang, Z.B. Tian, W.W. Wang, B.D. Wang, C. Wang, H. Wang, H.G. Wang, J.C. Wang, J.S. Key Laboratory of Particle Astrophyics Experimental Physics Division Computing Center Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China Tianfu Cosmic Ray Research Center Sichuan Chengdu China Dublin Institute for Advanced Studies 31 Fitzwilliam Place 2 Dublin Ireland Max-Planck-Institut for Nuclear Physics P.O. Box 103980 Heidelberg69029 Germany State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China Anhui Hefei230026 China School of Physical Science and Technology School of Information Science and Technology Southwest Jiaotong University Sichuan Chengdu610031 China College of Physics Sichuan University Sichuan Chengdu610065 China School of Astronomy and Space Science Nanjing University Jiangsu Nanjing210023 China Center for Astrophysics Guangzhou University Guangdong Guangzhou510006 China Key Laboratory of Dark Matter and Space Astronomy Purple Mountain Observatory Chinese Academy of Sciences Jiangsu Nanjing210023 China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai200030 China Ministry of Education Tibet Lhasa850000 China National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Hebei Normal University Hebei Shijiazhuang050024 China Zhuhai519000 China Dipartimento di Fisica Dell'Università di Napoli 'Federico II' Complesso Universitario di Monte Sant'Angelo via Cinthia Napoli80126 Italy School of Physics and Astronomy Yunnan University Yunnan Kunming650091 China Département de Physique Nucléaire et Corpusculaire Faculté de Sciences Université de Genève 24 Quai Ernest Ansermet Geneva1211 Switzerland Institute of Frontier and Interdisciplinary Science Shandong University Shandong Qingdao266237 China Department of Engineering Physics Tsinghua University Beijing100084

The kilometer squarearray (KM2A) of the large high altitude air shower observatory (LHAASO) aims at surveying the northern γ-ray sky at energies above 10 TeV with unprecedented sensitivity. γ-ray observations have long been one of the most powerful tools for dark matter searches, as, e.g., high-energy γrays could be produced by the decays of heavy dark matter particles. In this Letter, we present the first dark matter analysis with LHAASO-KM2A, using the first 340 days of data from 1/2-KM2A and 230 days of data from 3/4-KM2A. Several regions of interest are used to search for a signal and account for the residual cosmic-ray background after γ/hadron separation. We find no excess of dark matter signals, and thus place some of the strongest γ-ray constraints on the lifetime of heavy dark matter particles with mass between 105and 109GeV. Our results with LHAASO are robust, and have important implications for dark matter interpretations of the diffuse astrophysical high-energy neutrino emission. © 2022, CC BY.

关键词： Gamma rays

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Prominence of Pairing in Inclusive (p,2p) and (p,pn) Cross Sections from Neutron-Rich Nuclei

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Physical Review Letters 2019年第16期122卷 162503-162503页

作者： N. Paul A. Obertelli C. A. Bertulani A. Corsi P. Doornenbal J. L. Rodriguez-Sanchez G. Authelet H. Baba D. Calvet F. Château S. Chen A. Delbart J.-M. Gheller A. Giganon A. Gillibert T. Isobe V. Lapoux M. Matsushita S. Momiyama T. Motobayashi M. Niikura H. Otsu C. Péron A. Peyaud E. C. Pollacco J.-Y. Roussé H. Sakurai C. Santamaria M. Sasano Y. Shiga D. Steppenbeck S. Takeuchi R. Taniuchi T. Uesaka H. Wang K. Yoneda T. Ando T. Arici A. Blazhev F. Browne A. M. Bruce R. Carroll L. X. Chung M. L. Cortés M. Dewald B. Ding Zs. Dombradi F. Flavigny S. Franchoo F. Giacoppo M. Górska A. Gottardo K. Hadynska-Klek Z. Korkulu S. Koyama Y. Kubota A. Jungclaus J. Lee M. Lettmann B. D. Linh J. Liu Z. Liu C. Lizarazo C. Louchart R. Lozeva K. Matsui T. Miyazaki K. Moschner S. Nagamine N. Nakatsuka C. Nita S. Nishimura C. R. Nobs L. Olivier S. Ota Z. Patel Zs. Podolyák M. Rudigier E. Sahin T. Y. Saito C. Shand P.-A. Söderström I. G. Stefan T. Sumikama D. Suzuki R. Orlandi V. Vaquero Zs. Vajta V. Werner K. Wimmer J. Wu Z. Xu IRFU CEA Université Paris–Saclay F-91191 Gif-sur-Yvette France RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Department of Physics and Astronomy Texas A&M University-Commerce Commerce Texas 75429-3011 USA GSI Helmholtzzentrum für Schwerionenforschung GmbH D-64291 Darmstadt Germany School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China Center for Nuclear Study The University of Tokyo RIKEN campus Wako Saitama 351-0198 Japan Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima Tokyo 172-8501 Japan Justus-Liebig-Universität Giessen D-35392 Giessen Germany Institut für Kernphysik Universität zu Köln D-50937 Köln Germany School of Computing Engineering and Mathematics University of Brighton Brighton England BN2 4GJ United Kingdom Department of Physics University of Surrey Guildford England GU2 7XH United Kingdom Institute for Nuclear Science and Technology VINATOM P.O. Box 5T-160 Nghia Do Hanoi Vietnam Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 People’s Republic of China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Institut de Physique Nucléaire CNRS-IN2P3 Université Paris–Sud Université Paris–Saclay F-91406 Orsay Cedex France Department of Physics University of Oslo N-0316 Oslo Norway Instituto de Estructura de la Materia CSIC 28006 Madrid Spain Department of Physics The University of Hong Kong Pokfulam Hong Kong IPHC CNRS/IN2P3 Université de Strasbourg F-67037 Strasbourg France CSNSM CNRS/IN2P3 Université Paris–Sud F-91405 Orsay Campus France Department of Physics Faculty of Science Kyoto University Kyoto 606-8502 Japan Horia H

Fifty-five inclusive single nucleon-removal cross sections from medium mass neutron-rich nuclei impinging on a hydrogen target at ∼250 MeV/nucleon are measured at the RIKEN Radioactive Isotope Beam Factory. Systematically higher cross sections are found for proton removal from nuclei with an even number of protons as compared to odd-proton number projectiles for a given neutron separation energy. Neutron removal cross sections display no even-odd splitting, contrary to nuclear cascade model predictions. Both effects are understood through simple considerations of neutron separation energies and bound state level densities originating in pairing correlations in the daughter nuclei. These conclusions are supported by comparison with semimicroscopic model predictions, highlighting the enhanced role of low-lying level densities in nucleon-removal cross sections from loosely bound nuclei.

关键词： Direct reactions H & He induced nuclear reactions

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First observation of γ rays emitted from excited states south-east of Sn132: The πg9/2−1⊗νf7/2 multiplet of In83132

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Physical Review C 2016年第4期93卷 041301(R)-041301(R)页

作者： A. Jungclaus A. Gargano H. Grawe J. Taprogge S. Nishimura P. Doornenbal G. Lorusso Y. Shimizu G. S. Simpson P.-A. Söderström T. Sumikama Z. Y. Xu H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga S. Bönig L. Coraggio J.-M. Daugas F. Drouet A. Gadea S. Ilieva N. Itaco T. Kröll A. Montaner-Pizá K. Moschner D. Mücher H. Nishibata A. Odahara R. Orlandi A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain Istituto Nazionale di Fisica Nucleare Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany CEA DAM DIF 91297 Arpajon cedex France Instituto de Física Corpuscular CSIC-Univ. of Valencia E-46980 Paterna Spain Seconda Universit di Napoli Dipartimento di Matematica e Fisic

For the first time, the γ decay of excited states has been observed in a nucleus situated in the quadrant south-east of doubly magic Sn132, a region in which experimental information so far is limited to ground-state properties. Six γ rays with energies of 50, 86, 103, 227, 357, and 602 keV were observed following the β-delayed neutron emission from Cd85133, populated in the projectile fission of a U238 beam at the Radioactive Isotope Beam Factory at RIKEN within the EURICA project. The new experimental information is compared to the results of a modern realistic shell-model calculation, the first one in this region very far from stability, focusing in particular on the π0g9/2−1⊗ν1f7/2 particle-hole multiplet in In83132. In addition, theoretical estimates based on a scaling of the two-body matrix elements for the πh11/2−1⊗νg9/2 analog multiplet in Tl127208, one major proton and one major neutron shell above, are presented.

关键词： Beta decay 90 ≤ A ≤ 149 Radioactive beams Shell model

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Shell structure of the neutron-rich isotopes Co69,71,73

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Physical Review C 2020年第3期101卷 034314-034314页

作者： T. Lokotko S. Leblond J. Lee P. Doornenbal A. Obertelli A. Poves F. Nowacki K. Ogata K. Yoshida G. Authelet H. Baba D. Calvet F. Château S. Chen A. Corsi A. Delbart J.-M. Gheller A. Gillibert T. Isobe V. Lapoux M. Matsushita S. Momiyama T. Motobayashi M. Niikura H. Otsu C. Péron A. Peyaud E. C. Pollacco J.-Y. Roussé H. Sakurai C. Santamaria Z. Y. Xu M. Sasano Y. Shiga S. Takeuchi R. Taniuchi T. Uesaka H. Wang V. Werner F. Browne L. X. Chung Zs. Dombradi S. Franchoo F. Giacoppo A. Gottardo K. Hadynska-Klek Z. Korkulu S. Koyama Y. Kubota M. Lettmann C. Louchart R. Lozeva K. Matsui T. Miyazaki S. Nishimura L. Olivier S. Ota Z. Patel E. Sahin C. Shand P.-A. Söderström I. Stefan D. Steppenbeck T. Sumikama D. Suzuki Zs. Vajta J. Wu Department of Physics The University of Hong Kong Pokfulam Hong Kong RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan CEA Centre de Saclay IRFU/Service de Physique Nucléaire F-91191 Gif-sur-Yvette France Departmento de Fisica Teorica and IFT-UAM/CSIC Universidad Autónoma de Madrid Madrid Spain IPHC IN2P3/CNRS Université de Strasbourg 67037 Strasbourg France Research Center for Nuclear Physics (RCNP) Osaka University Ibaraki 567-0047 Japan Department of Physics Osaka City University Osaka 558-8585 Japan Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan Center for Nuclear Study University of Tokyo RIKEN campus Wako Saitama 351-0198 Japan Department of Physics University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima Tokyo 172-8501 Japan Institut für Kernphysik Technische Universität Darmstadt 64289 Darmstadt Germany School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Institute for Nuclear Science & Technology VINATOM P.O. Box 5T-160 Nghia Do Hanoi Vietnam MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Institut de Physique Nucléaire d'Orsay IN2P3-CNRS F-91406 Orsay Cedex France Department of Physics University of Oslo N-0316 Oslo Norway CSNSM IN2P3/CNRS Université Paris-Saclay 91405 Orsay Campus France Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics Tohoku University Sendai 980-8578 Japan State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People's Republic of China

The structures of the neutron-rich Co69,71,73 isotopes were investigated via (p,2p) knockout reactions at the Radioactive Isotope Beam Factory, RIKEN. Isotopes of interest were studied using the DALI2 γ-ray detector array combined with the MINOS target and tracker system. Level schemes were reconstructed using the γ−γ coincidence technique, with tentative spin-parity assignments based on the measured inclusive and exclusive cross sections. Comparison with shell-model calculations using the Lenzi-Nowacki-Poves-Sieja LNPS and PFSDG-U interactions suggests coexistence of spherical and deformed shapes at low excitation energies in the Co69,71,73 isotopes. The distorted-wave impulse approximation (DWIA) framework was used to calculate the single-particle cross sections. These values were compared with the experimental findings.

关键词： Direct reactions Nuclear reactions Nuclear structure & decays Shell model 59 ≤ A ≤ 89 Radioactive beams

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Nuclear structure of Ni76 from the (p,2p) reaction

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Physical Review C 2019年第1期99卷 014312-014312页

作者： Z. Elekes Á. Kripkó D. Sohler K. Sieja K. Ogata K. Yoshida P. Doornenbal A. Obertelli G. Authelet H. Baba D. Calvet F. Château A. Corsi A. Delbart J.-M. Gheller A. Gillibert T. Isobe V. Lapoux M. Matsushita S. Momiyama T. Motobayashi H. Otsu C. Péron A. Peyaud E. C. Pollacco J.-Y. Roussé H. Sakurai C. Santamaria Y. Shiga S. Takeuchi R. Taniuchi T. Uesaka H. Wang K. Yoneda F. Browne L. X. Chung Zs. Dombrádi F. Flavigny S. Franchoo F. Giacoppo A. Gottardo K. Hadyńska-Klęk Z. Korkulu S. Koyama Y. Kubota J. Lee M. Lettmann C. Louchart R. Lozeva K. Matsui T. Miyazaki M. Niikura S. Nishimura L. Olivier S. Ota Z. Patel E. Sahin C. Shand P.-A. Söderström I. Stefan D. Steppenbeck T. Sumikama D. Suzuki Zs. Vajta V. Werner J. Wu Z. Xu MTA Atomki P.O. Box 51 H-4001 Debrecen Hungary CNRS UMR 7178 F-67037 Strasbourg France Research Center for Nuclear Physics (RCNP) Osaka University Ibaraki 567-0047 Japan Department of Physics Osaka City University Osaka 558-8585 Japan Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan Institut für Kernphysik Technische Universität Darmstadt 64289 Darmstadt Germany IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France Center for Nuclear Study University of Tokyo RIKEN Campus Wako Saitama 351-0198 Japan Department of Physics University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima Tokyo 172-8501 Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Institute for Nuclear Science & Technology VINATOM P.O. Box 5T-160 Nghia Do Hanoi Vietnam Institut de Physique Nucléaire IN2P3-CNRS Université Paris-Sud Université Paris-Saclay 91406 Orsay Cedex France Department of Physics University of Oslo N-0316 Oslo Norway Department of Physics The University of Hong Kong Pokfulam Hong Kong Université de Strasbourg IPHC 23 rue du Loess F-67037 Strasbourg France CSNSM CNRS/IN2P3 Université Paris-Saclay F-91405 Orsay Campus France Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics Tohoku University Sendai 980-8578 Japan State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People's Republic of China

The nuclear structure of the Ni76 nucleus was investigated by (p,2p) reaction using a NaI(Tl) array to detect the deexciting prompt γ rays. A new transition with an energy of 2227 keV was identified by γγ and γγγ coincidences. According to these coincidence spectra the observed transition connects a new state at 4147 keV and the previously known 41+ state at 1920 keV. Two weaker transitions were also obtained at 2441 and 2838 keV, which could be tentatively placed to feed the known 21+ state at 990 keV. Our shell-model calculations using the Lenzi, Nowacki, Poves, and Sieja interaction produced good candidates for the experimental proton hole states in the observed energy region, and the theoretical cross sections showed good agreement with the experimental values. Although we could not assign all the experimental states to the theoretical ones unambiguously, the results are consistent with a reasonably large Z=28 shell gap for nickel isotopes in accordance with previous studies.

关键词： Electromagnetic transitions Energy levels & level densities Nuclear spin & parity Nuclear structure & decays Shell model Spectroscopic factors & electromagnetic moments 59 ≤ A ≤ 89

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γ-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr94,95,96

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Physical Review C 2022年第2期105卷 024302-024302页

作者： R.-B. Gerst A. Blazhev K. Moschner P. Doornenbal A. Obertelli K. Nomura J.-P. Ebran S. Hilaire J. Libert G. Authelet H. Baba D. Calvet F. Château S. Chen A. Corsi A. Delbart J.-M. Gheller A. Giganon A. Gillibert V. Lapoux T. Motobayashi M. Niikura N. Paul J.-Y. Roussé H. Sakurai C. Santamaria D. Steppenbeck R. Taniuchi T. Uesaka T. Ando T. Arici F. Browne A. M. Bruce R. Caroll L. X. Chung M. L. Cortés M. Dewald B. Ding F. Flavigny S. Franchoo M. Górska A. Gottardo J. Jolie A. Jungclaus J. Lee M. Lettmann B. D. Linh J. Liu Z. Liu C. Lizarazo S. Momiyama S. Nagamine N. Nakatsuka C. R. Nita C. Nobs L. Olivier R. Orlandi Z. Patel Zs. Podolyák M. Rudigier T. Saito C. Shand P.-A. Söderström I. Stefan V. Vaquero V. Werner K. Wimmer Z. Xu Institut für Kernphysik Universität zu Köln 50937 Köln Germany RIKEN Nishina Center Wako Saitama 351-0198 Japan IRFU CEA Université Paris-Saclay 91191 Gif-sur-Yvette France Department of Physics Faculty of Science University of Zagreb HR-10000 Zagreb Croatia CEA DAM DIF F-91297 Arpajon France Laboratoire Matière en Conditions Extrêmes CEA Université Paris-Saclay 91680 Bruyères-le-Châtel France School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Department of Physics University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Laboratoire Kastler Brossel Sorbonne Université CNRS ENS-PSL Research University Collège de France Case 74 4 Place Jussieu F-75005 Paris France GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Institute for Nuclear Science and Technique VINATOM 179 Hoang Quoc Viet Road Cau Giay Hanoi Vietnam Institut für Kernphysik Technische Universität Darmstadt 64289 Darmstadt Germany Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China Institut de Physique Nucléaire CNRS-IN2P3 Université Paris-Saclay 91406 Orsay Cedex France LPC Caen CNRS/IN2P3 Normandie Université ENSICAEN UNICAEN 14000 Caen France Instituto de Estructura de la Materia CSIC 28006 Madrid Spain Department of Physics The University of Hong Kong Pokfulam 999077 Hong Kong China School of Nuclear Science and Technology University of Chinese Academy of Sciences Beijing 100049 China Department of Physics Faculty of Science Kyoto University Kyoto 606-8502 Japan Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH) R-077125 Bucharest Romania Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan

We report on γ-ray spectroscopy of low-lying excited states in the neutron-rich Kr94,95,96 isotopes measured as part of the “Shell Evolution And Search for Two-plus energies At RIBF” (SEASTAR) campaign at the RIKEN Radioactive Isotope Beam Factory. Excited yrast and non-yrast states were observed, and half-lives extracted via geant4 simulations. In Kr94,96 candidates for the 31− state were identified. For Kr95, the prompt SEASTAR data were combined with delayed spectroscopic data measured with the EURICA array to observe transitions on top of the known (7/2)+ isomer at a level energy of 195.5(3) keV. The comparison of the new experimental results with five-dimensional collective Hamiltonian (5DCH) and mapped interacting boson model (IBM) calculations, both using the Gogny D1M interaction, could suggest oblate-prolate shape coexistence already in Kr96.

关键词： Electromagnetic transitions Isomer decays Nuclear structure & decays 90 ≤ A ≤ 149

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Sequential Nature of (p,3p) Two-Proton Knockout from Neutron-Rich Nuclei

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Physical Review Letters 2020年第1期125卷 012501-012501页

作者： A. Frotscher M. Gómez-Ramos A. Obertelli P. Doornenbal G. Authelet H. Baba D. Calvet F. Château S. Chen A. Corsi A. Delbart J.-M. Gheller A. Giganon A. Gillibert T. Isobe V. Lapoux M. Matsushita S. Momiyama T. Motobayashi M. Niikura H. Otsu N. Paul C. Péron A. Peyaud E. C. Pollacco J.-Y. Roussé H. Sakurai C. Santamaria M. Sasano Y. Shiga N. Shimizu D. Steppenbeck S. Takeuchi R. Taniuchi T. Uesaka H. Wang K. Yoneda T. Ando T. Arici A. Blazhev F. Browne A. M. Bruce R. Carroll L. X. Chung M. L. Cortés M. Dewald B. Ding Zs. Dombradi F. Flavigny S. Franchoo F. Giacoppo M. Górska A. Gottardo K. Hadyńska-Klęk Z. Korkulu S. Koyama Y. Kubota A. Jungclaus J. Lee M. Lettmann B. D. Linh J. Liu Z. Liu C. Lizarazo C. Louchart R. Lozeva K. Matsui T. Miyazaki K. Moschner S. Nagamine N. Nakatsuka C. Nita S. Nishimura C. R. Nobs L. Olivier S. Ota Z. Patel Zs. Podolyák M. Rudigier E. Sahin T. Y. Saito C. Shand P.-A. Söderström I. G. Stefan T. Sumikama D. Suzuki R. Orlandi V. Vaquero Zs. Vajta V. Werner K. Wimmer J. Wu Z. Xu Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France RIKEN Nishina Center 2-1 Hirosawa Wako Saitama 351-0198 Japan School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China Center for Nuclear Study The University of Tokyo RIKEN campus Wako Saitama 351-0198 Japan Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima Tokyo 172-8501 Japan Center for Nuclear Study The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan GSI Helmholtzzentrum für Schwerionenforschung GmbH D-64291 Darmstadt Germany Justus-Liebig-Universität Giessen D-35392 Giessen Germany Institut für Kernphysik Universität zu Köln D-50937 Köln Germany School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Institute for Nuclear Science & Technology VINATOM P.O. Box 5T-160 Nghia Do Hanoi Vietnam Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 People’s Republic of China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Present affiliation: LPC Caen ENSICAEN Université de Caen CNRS/IN2P3 14050 Caen Cedex 04 France Department of Physics University of Oslo N-0316 Oslo Norway Instituto de Estructura de la Materia CSIC 28006 Madrid Spain Department of Physics The University of Hong Kong Pokfulam Hong Kong School of Nuclear Science and Technology University of Chinese Academy of Sciences Beijing 100049 China IPHC CNRS/IN2P3 Université de Strasbourg F-67037 Strasbourg France CSNSM CNRS/IN2P3 Université Paris-Sud F-91405 Orsay Campus France Department of Physics Faculty of Science Kyoto University Kyoto 606-8502 Japan Horia Hulubei National Institute of Physic

Twenty-one two-proton knockout (p,3p) cross sections were measured from neutron-rich nuclei at ∼250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for the first time, demonstrating that the (p,3p) kinematics are consistent with two sequential proton-proton collisions within the projectile nucleus. Ratios of (p,3p) over (p,2p) inclusive cross sections follow the trend of other many-nucleon removal reactions, further reinforcing the sequential nature of (p,3p) in neutron-rich nuclei.

关键词： Direct reactions Rare & new isotopes

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Search for Continuous Gravitational Waves from Known Pulsars in the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run

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Astrophysical Journal 2025年第2期983卷 99-99页

作者： Abac, A.G. Abbott, R. Abouelfettouh, I. Acernese, F. Ackley, K. Adhicary, S. Adhikari, N. Adhikari, R.X. Adkins, V.K. Agarwal, D. Agathos, M. Aghaei Abchouyeh, M. Aguiar, O.D. Aguilar, I. Aiello, L. Ain, A. Ajith, P. Akutsu, T. Albanesi, S. Alfaidi, R.A. Al-Jodah, A. Alléné, C. Allocca, A. Al-Shammari, S. Altin, P.A. Alvarez-Lopez, S. Amato, A. Amez-Droz, L. Amorosi, A. Amra, C. Ananyeva, A. Anderson, S.B. Anderson, W.G. Andia, M. Ando, M. Andrade, T. Andres, N. Andrés-Carcasona, M. Andrić, T. Anglin, J. Ansoldi, S. Antelis, J.M. Antier, S. Aoumi, M. Appavuravther, E.Z. Appert, S. Apple, S.K. Arai, K. Araya, A. Araya, M.C. Areeda, J.S. Argianas, L. Aritomi, N. Armato, F. Arnaud, N. Arogeti, M. Aronson, S.M. Ashton, G. Aso, Y. Assiduo, M. Assis de Souza Melo, S. Aston, S.M. Astone, P. Attadio, F. Aubin, F. AultONeal, K. Avallone, G. Babak, S. Badaracco, F. Badger, C. Bae, S. Bagnasco, S. Bagui, E. Baier, J.G. Baiotti, L. Bajpai, R. Baka, T. Ball, M. Ballardin, G. Ballmer, S.W. Banagiri, S. Banerjee, B. Bankar, D. Baral, P. Barayoga, J.C. Barish, B.C. Barker, D. Barneo, P. Barone, F. Barr, B. Barsotti, L. Barsuglia, M. Barta, D. Bartoletti, A.M. Barton, M.A. Bartos, I. Basak, S. Basalaev, A. Bassiri, R. Basti, A. Bates, D.E. Bawaj, M. Baxi, P. Bayley, J.C. Baylor, A.C. Baynard, P.A. Bazzan, M. Bedakihale, V.M. Beirnaert, F. Bejger, M. Belardinelli, D. Bell, A.S. Benedetto, V. Benoit, W. Bentley, J.D. Ben Yaala, M. Bera, S. Berbel, M. Bergamin, F. Berger, B.K. Bernuzzi, S. Beroiz, M. Bersanetti, D. Bertolini, A. Betzwieser, J. Beveridge, D. Bevins, N. Bhandare, R. Bhardwaj, U. Bhatt, R. Bhattacharjee, D. Bhaumik, S. Bhowmick, S. Bianchi, A. Bilenko, I.A. Billingsley, G. Binetti, A. Bini, S. Birnholtz, O. Biscoveanu, S. Bisht, A. Bitossi, M. Bizouard, M.-A. Blackburn, J.K. Blagg, L.A. Blair, C.D. Blair, D.G. Bobba, F. Bode, N. Boileau, G. Boldrini, M. Bolingbroke, G.N. Bolliand, A. Bonavena, L.D. Bondarescu, R. Bondu, F. Bonilla, E. Bonilla, M.S. Bonino, A. Bonnand, R. Booker, P. Borchers, A. Boschi, V. Bose, S. Boss Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Potsdam D-14476 Germany LIGO Laboratory California Institute of Technology Pasadena 91125 CA United States LIGO Hanford Observatory Richland 99352 WA United States Dipartimento di Farmacia Università di Salerno Fisciano Salerno I-84084 Italy INFN Sezione di Napoli Napoli I-80126 Italy University of Warwick Coventry CV 47AL United Kingdom The Pennsylvania State University University Park 16802 PA United States University of Wisconsin-Milwaukee Milwaukee 53201 WI United States Louisiana State University Baton Rouge 70803 LA United States Université Catholique de Louvain Louvain-la-Neuve B-1348 Belgium Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Queen Mary University of London London E1 4NS United Kingdom Department of Physics and Astronomy Sejong University 209 Neungdong-ro Gwangjin-gu Seoul 143-747 South Korea Instituto Nacional de Pesquisas Espaciais São José dos Campos São Paulo 12227-010 Brazil Stanford University Stanford 94305 CA United States Università di Roma Tor Vergata Roma I-00133 Italy INFN Sezione di Roma Tor Vergata Roma I-00133 Italy Cardiff University Cardiff CF24 3AA United Kingdom Universiteit Antwerpen Antwerpen 2000 Belgium International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan INFN Sezione di Torino Torino I-10125 Italy Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena Jena D-07743 Germany Dipartimento di Fisica Università degli Studi di Torino Torino I-10125 Italy SUPA University of Glasgow Glasgow G12 8QQ United Kingdom OzGrav University of Western Australia Crawley 6009 WA

Continuous gravitational waves (CWs) emission from neutron stars carries information about their internal structure and equation of state, and it can provide tests of general relativity. We present a search for CWs from a set of 45 known pulsars in the first part of the fourth LIGO-Virgo-KAGRA observing run, known as O4a. We conducted a targeted search for each pulsar using three independent analysis methods considering single-harmonic and dual-harmonic emission models. We find no evidence of a CW signal in O4a data for both models and set upper limits on the signal amplitude and on the ellipticity, which quantifies the asymmetry in the neutron star mass distribution. For the single-harmonic emission model, 29 targets have the upper limit on the amplitude below the theoretical spin-down limit. The lowest upper limit on the amplitude is 6.4 × 10^-27 for the young energetic pulsar J0537-6910, while the lowest constraint on the ellipticity is 8.8 × 10^-9 for the bright nearby millisecond pulsar J0437-4715. Additionally, for a subset of 16 targets, we performed a narrowband search that is more robust regarding the emission model, with no evidence of a signal. We also found no evidence of nonstandard polarizations as predicted by the Brans-Dicke theory. © 2025. The Author(s). Published by the American Astronomical Society.

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Search for heavy resonances decaying to a Z boson and a photon in pp collisions at s=13 TeV with the ATLAS detector

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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 2017年 764卷 11-30页

作者： Aaboud, M. Aad, G. Abbott, B. Abdallah, J. Abdinov, O. Abeloos, B. Aben, R. AbouZeid, O.S. Abraham, N.L. Abramowicz, H. Abreu, H. Abreu, R. Abulaiti, Y. Acharya, B.S. Adachi, S. Adamczyk, L. Adams, D.L. Adelman, J. Adomeit, S. Adye, T. Affolder, A.A. Agatonovic-Jovin, T. Agricola, J. Aguilar-Saavedra, J.A. Ahlen, S.P. Ahmadov, F. Aielli, G. Akerstedt, H. Åkesson, T.P.A. Akimov, A.V. Alberghi, G.L. Albert, J. Albrand, S. Alconada Verzini, M.J. Aleksa, M. Aleksandrov, I.N. Alexa, C. Alexander, G. Alexopoulos, T. Alhroob, M. Ali, B. Aliev, M. Alimonti, G. Alison, J. Alkire, S.P. Allbrooke, B.M.M. Allen, B.W. Allport, P.P. Aloisio, A. Alonso, A. Alonso, F. Alpigiani, C. Alshehri, A.A. Alstaty, M. Alvarez Gonzalez, B. Álvarez Piqueras, D. Alviggi, M.G. Amadio, B.T. Amako, K. Amaral Coutinho, Y. Amelung, C. Amidei, D. Amor Dos Santos, S.P. Amorim, A. Amoroso, S. Amundsen, G. Anastopoulos, C. Ancu, L.S. Andari, N. Andeen, T. Anders, C.F. Anders, G. Anders, J.K. Anderson, K.J. Andreazza, A. Andrei, V. Angelidakis, S. Angelozzi, I. Anger, P. Angerami, A. Anghinolfi, F. Anisenkov, A.V. Anjos, N. Annovi, A. Antel, C. Antonelli, M. Antonov, A. Anulli, F. Aoki, M. Aperio Bella, L. Arabidze, G. Arai, Y. Araque, J.P. Arce, A.T.H. Arduh, F.A. Arguin, J-F. Argyropoulos, S. Arik, M. Armbruster, A.J. Armitage, L.J. Arnaez, O. Arnold, H. Arratia, M. Arslan, O. Artamonov, A. Artoni, G. Artz, S. Asai, S. Asbah, N. Ashkenazi, A. Åsman, B. Asquith, L. Assamagan, K. Astalos, R. Atkinson, M. Atlay, N.B. Augsten, K. Avolio, G. Axen, B. Ayoub, M.K. Azuelos, G. Baak, M.A. Baas, A.E. Baca, M.J. Bachacou, H. Bachas, K. Backes, M. Backhaus, M. Bagiacchi, P. Bagnaia, P. Bai, Y. Baines, J.T. Baker, O.K. Baldin, E.M. Balek, P. Balestri, T. Balli, F. Balunas, W.K. Banas, E. Banerjee, Sw. Bannoura, A.A.E. Barak, L. Barberio, E.L. Barberis, D. Barbero, M. Barillari, T. Barisits, M-S Barklow, T. Barlow, N. Barnes, S.L. Barnett, B.M. Barnett, R.M. Barnovska-Blenessy, Z. Baroncelli, A. Barone, G. Barr, A.J. Barranco Navarro, L. Barreiro, F. Barreiro Gui Department of Physics University of Adelaide Adelaide Australia Physics Department SUNY Albany Albany NY United States Department of Physics University of Alberta Edmonton AB Canada Department of Physics Ankara University Ankara Turkey Istanbul Aydin University Istanbul Turkey Division of Physics TOBB University of Economics and Technology Ankara Turkey LAPP CNRS/IN2P3 Université Savoie Mont Blanc Annecy-le-Vieux France High Energy Physics Division Argonne National Laboratory Argonne IL United States Department of Physics University of Arizona Tucson AZ United States Department of Physics The University of Texas at Arlington Arlington TX United States Physics Department University of Athens Athens Greece Physics Department National Technical University of Athens Zografou Greece Department of Physics The University of Texas at Austin Austin TX United States Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Institut de Física d'Altes Energies (IFAE) The Barcelona Institute of Science and Technology Barcelona Spain Institute of Physics University of Belgrade Belgrade Serbia Department for Physics and Technology University of Bergen Bergen Norway Physics Division Lawrence Berkeley National Laboratory University of California Berkeley CA United States Department of Physics Humboldt University Berlin Germany Albert Einstein Center for Fundamental Physics Laboratory for High Energy Physics University of Bern Bern Switzerland School of Physics and Astronomy University of Birmingham Birmingham United Kingdom Department of Physics Bogazici University Istanbul Turkey Department of Physics Engineering Gaziantep University Gaziantep Turkey Istanbul Bilgi University Faculty of Engineering and Natural Sciences Istanbul Turkey Bahcesehir University Faculty of Engineering and Natural Sciences Istanbul Turkey Centro de Investigaciones Universidad Antonio Narino Bogota Colombia INFN Sezione di Bologna Italy Dipartimento di Fis

This Letter presents a search for new resonances with mass larger than 250 GeV, decaying to a Z boson and a photon. The dataset consists of an integrated luminosity of 3.2 fb−1 of pp collisions collected at s=13 TeV w... 详细信息

This Letter presents a search for new resonances with mass larger than 250 GeV, decaying to a Z boson and a photon. The dataset consists of an integrated luminosity of 3.2 fb⁻¹ of pp collisions collected at s=13 TeV with the ATLAS detector at the Large Hadron Collider. The Z bosons are identified through their decays either to charged, light, lepton pairs (e⁺e⁻, μ⁺μ⁻) or to hadrons. The data are found to be consistent with the expected background in the whole mass range investigated and upper limits are set on the production cross section times decay branching ratio to Zγ of a narrow scalar boson with mass between 250 GeV and 2.75 TeV. © 2016 The Author(s)

关键词： Z bosons CROSS sections (Nuclear physics) PHOTON-photon interactions LARGE Hadron Collider (France & Switzerland) DILEPTON production NUCLEAR counters

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Erratum: Towards a muon collider

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The European Physical Journal C 2024年第1期84卷 1-4页

作者： Accettura, Carlotta Adams, Dean Agarwal, Rohit Ahdida, Claudia Aimè, Chiara Amapane, Nicola Amorim, David Andreetto, Paolo Anulli, Fabio Appleby, Robert Apresyan, Artur Apyan, Aram Arsenyev, Sergey Asadi, Pouya Mahmoud, Mohammed Attia Azatov, Aleksandr Back, John Balconi, Lorenzo Bandiera, Laura Barlow, Roger Bartosik, Nazar Barzi, Emanuela Batsch, Fabian Bauce, Matteo Berg, J. Scott Bersani, Andrea Bertarelli, Alessandro Bertolin, Alessandro Black, Kevin Boattini, Fulvio Bogacz, Alex Bonesini, Maurizio Bordini, Bernardo Bottaro, Salvatore Bottura, Luca Braghieri, Alessandro Breschi, Marco Bruhwiler, Natalie Buffat, Xavier Buonincontri, Laura Burrows, Philip N. Burt, Graeme Buttazzo, Dario Caiffi, Barbara Calviani, Marco Calzaferri, Simone Calzolari, Daniele Capdevilla, Rodolfo Carli, Christian Casaburo, Fausto Casarsa, Massimo Castelli, Luca Catanesi, Maria Gabriella Cavallucci, Lorenzo Cavoto, Gianluca Celiberto, Francesco Giovanni Celona, Luigi Cerri, Alessandro Cesarini, Gianmario Cesarotti, Cari Chachamis, Grigorios Chance, Antoine Chen, Siyu Chien, Yang-Ting Chiesa, Mauro Colaleo, Anna Collamati, Francesco Collazuol, Gianmaria Costa, Marco Craig, Nathaniel Curatolo, Camilla Curtin, David Da Molin, Giacomo Dam, Magnus Damerau, Heiko Dasu, Sridhara de Blas, Jorge De Curtis, Stefania De Matteis, Ernesto De Rosa, Stefania Delahaye, Jean-Pierre Denisov, Dmitri Denizli, Haluk Densham, Christopher Dermisek, Radovan Di Luzio, Luca Di Meco, Elisa Di Micco, Biagio Dienes, Keith Diociaiuti, Eleonora Dorigo, Tommaso Dudarev, Alexey Edgecock, Robert Errico, Filippo Fabbrichesi, Marco Farinon, Stefania Ferrari, Anna Somoza, Jose Antonio Ferreira Filthaut, Frank Fiorina, Davide Fol, Elena Forslund, Matthew Franceschini, Roberto Ximenes, Rui Franqueira Gabrielli, Emidio Gallinaro, Michele Garosi, Francesco Giambastiani, Luca Gianelle, Alessio Gilardoni, Simone Giove, Dario Augusto Giraldin, Carlo Glioti, Alfredo Greco, Mario Greljo, Admir Groeber, Ramona Grojean, Christophe Grudiev, Alexej Gu, Jiayin Han, Chengcheng Han, T Organisation Européenne pour la Recherche Nucléaire (CERN) Geneva Switzerland STFC Rutherford Appleton Laboratory (RAL) Oxford UK Computer Science Department University of California (UC) Berkeley USA Dipartimento di Fisica Università di Pavia Pavia Italy INFN Sezione di Pavia Pavia Italy INFN Sezione di Torino Turin Italy Dipartimento di Fisica Università di Torino Turin Italy INFN Sezione di Padova Padua Italy INFN Sezione di Roma Rome Italy School of Physics and Astronomy University of Manchester Manchester UK Fermi National Accelerator Laboratory Batavia USA Department of Physics Brandeis University Waltham USA IRFU CEA University Paris-Saclay Gif-sur-Yvette France Center for Theoretical Physics Massachusetts Institute of Technology Cambridge USA Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt SISSA International School for Advanced Studies Trieste Italy INFN Sezione di Trieste Trieste Italy Department of Physics University of Warwick Coventry UK Dipartimento di Fisica Università di Milano Milan Italy INFN Laboratori Acceleratori e Superconduttività Applicata (LASA) Milan Italy INFN Sezione di Ferrara Ferrara Italy School of Computing and Engineering The University of Huddersfield Huddersfield UK Ohio State University Columbus USA Brookhaven National Laboratory Upton USA INFN Sezione di Genova Genoa Italy University of Wisconsin Wisconsin USA Center for Advanced Studies of Accelerators Jefferson Lab Newport News USA INFN Sezione di Milano Bicocca Milan Italy Dipartimento di Fisica Università di Milano Bicocca Milan Italy Scuola Normale Superiore Pisa Italy INFN Sezione di Pisa Pisa Italy Dipartimento di Ingegneria dell’Energia Elettrica e dell’Informazione Università di Bologna Bologna Italy INFN Sezione di Bologna Bologna Italy Department of Physics University of California (UC) Berkeley USA Dipartimento di Fisica e Astronomia Università di Padova Padoa Italy John Adams Institute University of O

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