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arXiv 2024年

作者： Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C.A. Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alkhazov, G. Alvarez Cartelle, P. Amato, S. Amhis, Y. An, L. Anderlini, L. Andreianov, A. Andreotti, M. Archilli, F. Artamonov, A. Artuso, M. Arzymatov, K. Aslanides, E. Atzeni, M. Audurier, B. Bachmann, S. Bachmayer, M. Back, J.J. Baker, S. Baladron Rodriguez, P. Balagura, V. Baldini, W. Baptista Leite, J. Barlow, R.J. Barsuk, S. Barter, W. Bartolini, M. Baryshnikov, F. Basels, J.M. Bassi, G. Batsukh, B. Battig, A. Bay, A. Becker, M. Bedeschi, F. Bediaga, I. Beiter, A. Belavin, V. Belin, S. Bellee, V. Belous, K. Belov, I. Belyaev, I. Bencivenni, G. Ben-Haim, E. Berezhnoy, A. Bernet, R. Berninghoff, D. Bernstein, H.C. Bertella, C. Bertolin, A. Betancourt, C. Betti, F. Bezshyiko, Ia. Bhasin, S. Bhom, J. Bian, L. Bieker, M.S. Bifani, S. Billoir, P. Birch, M. Bishop, F.C.R. Bitadze, A. Bizzeti, A. Bjørn, M. Blago, M.P. Blake, T. Blanc, F. Blusk, S. Bobulska, D. Boelhauve, J.A. Boente Garcia, O. Boettcher, T. Boldyrev, A. Bondar, A. Bondar, N. Borghi, S. Borisyak, M. Borsato, M. Borsuk, J.T. Bouchiba, S.A. Bowcock, T.J.V. Boyer, A. Bozzi, C. Bradley, M.J. Braun, S. Brea Rodriguez, A. Brodski, M. Brodzicka, J. Brossa Gonzalo, A. Brundu, D. Buonaura, A. Burr, C. Bursche, A. Butkevich, A. Butter, J.S. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Calefice, L. Calero Diaz, L. Cali, S. Calladine, R. Calvi, M. Calvo Gomez, M. Camargo Magalhaes, P. Camboni, A. Campana, P. Campoverde Quezada, A.F. Capelli, S. Capriotti, L. Carbone, A. Carboni, G. Cardinale, R. Cardini, A. Carli, I. Carniti, P. Carus, L. Carvalho Akiba, K. Casais Vidal, A. Casse, G. Cattaneo, M. Cavallero, G. Celani, S. Cerasoli, J. Chadwick, A.J. Chapman, M.G. Charles, M. Charpentier, Ph. Chatzikonstantinidis, G. Chavez Barajas, C.A. Chefdeville, M. Chen, C. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China Beijing China School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China University of Chinese Academy of Sciences Beijing China Institute of Particle Physics Central China Normal University Hubei Wuhan China Univ. Savoie Mont Blanc CNRS IN2P3-LAPP Annecy France Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Aix Marseille Univ CNRS/IN2P3 CPPM Marseille France Université Paris-Saclay CNRS/IN2P3 IJCLab Orsay France Laboratoire Leprince-Ringuet CNRS/IN2P3 Ecole Polytechnique Institut Polytechnique de Paris Palaiseau France LPNHE Sorbonne Université Paris Diderot Sorbonne Paris Cité CNRS/IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland INFN Sezione di Bari Bari Italy INFN Sezione di Bologna Bologna Italy INFN Sezione di Ferrara Ferrara Italy INFN Sezione di Firenze Firenze Italy INFN Laboratori Nazionali di Frascati Frascati Italy INFN Sezione di Genova Genova Italy INFN Sezione di Milano Milano Italy INFN Sezione di Milano-Bicocca Milano Italy INFN Sezione di Cagliari Monserrato Italy Universita degli Studi di Padova Universita e INFN Padova Padova Italy INFN Sezione di Pisa Pisa Italy INFN Sezione di Roma La Sapienza Roma Italy INFN Sezione di Roma Tor Vergata Roma Italy Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Nikhef National Institute for Subatomic Physics VU University Amsterdam Amsterdam Netherlands AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Henryk Niewodniczanski Institute of Nuclear Physics Polish

Decays of Ξb- and Ωb- baryons to Λ+c h-h′- final states, with h-h′- being π-π-, K-π- and K-K- meson pairs, are searched for using data collected with the LHCb detector. The data sample studied corresponds to an integrated luminosity of 8.7 fb-1 of pp collisions collected at centre-of-mass energies √s = 7, 8 and 13 TeV. The products of the relative branching fractions and fragmentation fractions for each signal mode, relative to the B- → Λ+c pπ- mode, are measured, with Ξb- → Λ+c K-π-, Ξb- → Λ+c K-K- and Ωb- → Λ+c K-K- decays being observed at over 5 σ significance. The Ξb- → Λ+c K-π- mode is also used to measure the Ξb- production asymmetry, which is found to be consistent with zero. In addition, the B- → Λ+c pK- decay is observed for the first time, and its branching fraction is measured relative to that of the B- → Λ+c pπ- mode. © 2024, CC BY.

关键词： Hadrons

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Measurement of the CKM angle γ in B± → D K∗(892)± decays

arXiv

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arXiv 2024年

Measurements of CP observables and the CKM angle γ are performed in B± → DK∗(892)± decays, where D represents a superposition of D0 and D0 states, using the LHCb dataset collected during Run 1 (2011–2012) and Run 2 (2015–2018). A comprehensive study of this channel is presented with the D meson reconstructed in two-body final states K±π, K+K- and π+π-;four-body final states K±ππ±π and π+π-π+π-;and three-body final states KS0π+π- and KS0K+K-. This analysis includes the first observation of the suppressed B± → [π+K-]DK∗± and B± → [π+K-π+π-]DK∗± decays. The combined result gives γ = (63 ± 13)◦ © 2024, CC BY.

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Observation of exotic J/ψ resonances in diffractive processes in proton-proton collisions

arXiv

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arXiv 2024年

The first study of J/ψ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at centreof-mass energy of 13 TeV, corresponding to an integrated luminosity of 5 fb-1. The data disfavour a nonresonant J/ψ production but are consistent with a resonant model including several resonant states observed previously only in B+ → J/ψK+ decays. The χc0(4500) state is observed with a significance over 5 σ and the χc1(4274) is confirmed with a significance of more than 4 σ. © 2024, CC BY.

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DDK system in finite volume

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Physical Review D 2020年第11期102卷 114515-114515页

作者： Jin-Yi Pang Jia-Jun Wu Li-Sheng Geng College of Science University of Shanghai for Science and Technology Shanghai 200093 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China School of Physics Beihang University Beijing 100191 China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing 100191 China Beijing Advanced Innovation Center for Big Data-Based Precision Medicine School of Medicine and Engineering Beihang University Beijing 100191 China School of Physics and Microelectronics Zhengzhou University Zhengzhou Henan 450001 China

The DDK three-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 three-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 three-body quantization condition scheme is derived via the nonrelativistic effective theory and the particle-dimer picture in a finite volume. The lattice spectrum of this three-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.

关键词： Bound states Effective field theory Hadron-hadron interactions Lattice QCD

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EUSO-SPB2 Telescope Optics and Testing 37

EUSO-SPB2 Telescope Optics and Testing

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37th International Cosmic Ray Conference, ICRC 2021

作者： Kungel, Viktoria Bachman, Randy Brewster, Jerod Dawes, Madeline Desiato, Julianna Eser, Johannes Finch, William Huelett, Lindsey Olinto, Angela V. Pace, Justin Pech, Miroslav Reardon, Patrick Schovanek, Petr Wang, Chantal Wiencke, Lawrence Abdellaoui, G. Abe, S. Adams, J.H. Allard, D. Alonso, G. Anchordoqui, L. Anzalone, A. Arnone, E. Asano, K. Attallah, R. Attoui, H. Ave Pernas, M. Bagheri, M. Baláz, J. Bakiri, M. Barghini, D. Bartocci, S. Battisti, M. Bayer, J. Beldjilali, B. Belenguer, T. Belkhalfa, N. Bellotti, R. Belov, A.A. Benmessai, K. Bertaina, M. Bertone, P.F. Biermann, P.L. Bisconti, F. Blaksley, C. Blanc, N. Blin-Bondil, S. Bobik, P. Bogomilov, M. Bolmgren, K. Bozzo, E. Briz, S. Bruno, A. Caballero, K.S. Cafagna, F. Cambié, G. Campana, D. Capdevielle, J.-N. Capel, F. Caramete, A. Caramete, L. Carlson, P. Caruso, R. Casolino, M. Cassardo, C. Castellina, A. Catalano, O. Cellino, A. Černý, K. Chikawa, M. Chiritoi, G. Christl, M.J. Colalillo, R. Conti, L. Cotto, G. Crawford, H.J. Cremonini, R. Creusot, A. de Castro Gónzalez, A. de la Taille, C. del Peral, L. Diaz Damian, A. Diesing, R. Dinaucourt, P. Djakonow, A. Djemil, T. Ebersoldt, A. Ebisuzaki, T. Fenu, F. Fernández-González, S. Ferrarese, S. Filippatos, G. Fornaro, C. Fouka, M. Franceschi, A. Franchini, S. Fuglesang, C. Fujii, T. Fukushima, M. Galeotti, P. García-Ortega, E. Gardiol, D. Garipov, G.K. Gascón, E. Gazda, E. Genci, J. Golzio, A. González Alvarado, C. Gorodetzky, P. Green, A. Guarino, F. Guépin, C. Guzmán, A. Hachisu, Y. Haungs, A. Hernández Carretero, J. Hulett, L. Ikeda, D. Inoue, N. Inoue, S. Isgrò, F. Itow, Y. Jammer, T. Jeong, S. Joven, E. Judd, E.G. Jochum, J. Kajino, F. Kajino, T. Kalli, S. Kaneko, I. Karadzhov, Y. Kasztelan, M. Katahira, K. Kawai, K. Kawasaki, Y. Kedadra, A. Khales, H. Khrenov, B.A. Kim, Jeong-Sook Kim, Soon-Wook Kleifges, M. Klimov, P.A. Kolev, D. Kreykenbohm, I. Krizmanic, J.F. Królik, K. Kurihara, Y. Kusenko, A. Kuznetsov, E. Joint Laboratory of Optics Palacky University Institute of Physics AV ČR Olomouc Czech Republic Algiers Algeria Algiers Algeria LPR Dept. of Physics Faculty of Sciences University Badji Mokhtar Annaba Algeria Univ. Constantine I Constantine Algeria Department of Physics Faculty of Sciences University of M'sila M'sila Algeria Research Unit on Optics and Photonics UROP-CDTA Sétif Algeria Telecom Lab. Faculty of Technology University Abou Bekr Belkaid Tlemcen Algeria St. Kliment Ohridski University of Sofia Bulgaria 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 IRAP Université de Toulouse CNRS Toulouse France ECAP University of Erlangen-Nuremberg Germany Germany Experimental Physics Institute Kepler Center University of Tübingen Germany Institute for Astronomy and Astrophysics Kepler Center University of Tübingen Germany Technical University of Munich Munich Germany Istituto Nazionale di Fisica Nucleare - Sezione Di Bari Italy Universita' degli Studi di Bari Aldo Moro INFN - Sezione di Bari Italy Dipartimento di Fisica e Astronomia "Ettore Majorana" Universita' 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 Universita' 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 Universita' di Roma Tor Vergata Dipartimento di Fisica Roma Italy Istituto Nazionale di Fisica Nucleare - Sezione di Torino Italy Dipartimento di Fisica Universita' di Torino Italy Osservatorio

The Extreme Universe Space Observatory - Super Pressure Balloon (EUSO-SPB2) mission will fly two custom telescopes that feature Schmidt optics to measure Čerenkov- and fluorescence-emission of extensive air-showers from cosmic rays at the PeV and EeV-scale, and search for τ-neutrinos. Both telescopes have 1-meter diameter apertures and UV/UV-visible sensitivity. The Čerenkov telescope uses a bifocal mirror segment alignment, to distinguish between a direct cosmic ray that hits the camera versus the Čerenkov light from outside the telescope. Telescope integration and laboratory calibration will be performed in Colorado. To estimate the point spread function and efficiency of the integrated telescopes, a test beam system that delivers a 1-meter diameter parallel beam of light is being fabricated. End-to-end tests of the fully integrated instruments will be carried out in a field campaign at dark sites in the Utah desert using cosmic rays, stars, and artificial light sources. Laser tracks have long been used to characterize the performance of fluorescence detectors in the field. For EUSO-SPB2 an improvement in the method that includes a correction for aerosol attenuation is anticipated by using a bi-dynamic Lidar configuration in which both the laser and the telescope are steerable. We plan to conduct these field tests in Fall 2021 and Spring 2022 to accommodate the scheduled launch of EUSO-SPB2 in 2023 from Wanaka, New Zealand. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0)

关键词： Fluorescence

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Quasifree Neutron Knockout Reaction Reveals a Small s-Orbital Component in the Borromean Nucleus B17

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Physical Review Letters 2021年第8期126卷 082501-082501页

作者： Z. H. Yang Y. Kubota A. Corsi K. Yoshida X.-X. Sun J. G. Li M. Kimura N. Michel K. Ogata C. X. Yuan Q. Yuan G. Authelet H. Baba C. Caesar D. Calvet A. Delbart M. Dozono J. Feng F. Flavigny J.-M. Gheller J. Gibelin A. Giganon A. Gillibert K. Hasegawa T. Isobe Y. Kanaya S. Kawakami D. Kim Y. Kiyokawa M. Kobayashi N. Kobayashi T. Kobayashi Y. Kondo Z. Korkulu S. Koyama V. Lapoux Y. Maeda F. M. Marqués T. Motobayashi T. Miyazaki T. Nakamura N. Nakatsuka Y. Nishio A. Obertelli A. Ohkura N. A. Orr S. Ota H. Otsu T. Ozaki V. Panin S. Paschalis E. C. Pollacco S. Reichert J.-Y. Roussé A. T. Saito S. Sakaguchi M. Sako C. Santamaria M. Sasano H. Sato M. Shikata Y. Shimizu Y. Shindo L. Stuhl T. Sumikama Y. L. Sun M. Tabata Y. Togano J. Tsubota F. R. Xu J. Yasuda K. Yoneda J. Zenihiro S.-G. Zhou W. Zuo T. Uesaka Research Center for Nuclear Physics (RCNP) Osaka University 10-1 Mihogaoka Ibaraki Osaka 567-0047 Japan RIKEN Nishina Center Hirosawa 2-1 Wako Saitama 351-0198 Japan Center for Nuclear Study The University of Tokyo Hongo 7-3-1 Bunkyo Tokyo 113-0033 Japan Département de Physique Nucléaire IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Department of Physics Hokkaido University Sapporo 060-0810 Japan Nuclear Reaction Data Centre Hokkaido University Sapporo 060-0810 Japan Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China School of Nuclear Science and Technology University of Chinese Academy of Sciences Beijing 100049 China Department of Physics Osaka City University Osaka 558-8585 Japan Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Zhuhai 519082 Guangdong China Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany IPN Orsay Université Paris Sud IN2P3-CNRS F-91406 Orsay Cedex France LPC Caen ENSICAEN Université de Caen Normandie CNRS/IN2P3 F-14050 Caen Cedex France Department of Physics Tohoku University Aramaki Aza-Aoba 6-3 Aoba Sendai Miyagi 980-8578 Japan Department of Applied Physics University of Miyazaki Gakuen-Kibanadai-Nishi 1-1 Miyazaki 889-2192 Japan Center for Exotic Nuclear Studies Institute for Basic Science Daejeon 34126 Republic of Korea Department of Physics The University of Tokyo Hongo 7-3-1 Bunkyo Tokyo 113-0033 Japan Department of Physics Tokyo Institute of Technology 2-12-1 O-Okayama Meguro To

A kinematically complete quasifree (p,pn) experiment in inverse kinematics was performed to study the structure of the Borromean nucleus B17, which had long been considered to have a neutron halo. By analyzing the momentum distributions and exclusive cross sections, we obtained the spectroscopic factors for 1s1/2 and 0d5/2 orbitals, and a surprisingly small percentage of 9(2)% was determined for 1s1/2. Our finding of such a small 1s1/2 component and the halo features reported in prior experiments can be explained by the deformed relativistic Hartree-Bogoliubov theory in continuum, revealing a definite but not dominant neutron halo in B17. The present work gives the smallest s- or p-orbital component among known nuclei exhibiting halo features and implies that the dominant occupation of s or p orbitals is not a prerequisite for the occurrence of a neutron halo.

关键词： Direct reactions nuclear reactions Spectroscopic factors & electromagnetic moments Unstable nuclei induced nuclear reactions 6 ≤ A ≤ 19 Ab initio calculations nuclear density functional theory nuclear many-body theory Optical, coupled-channel & distorted wave models Radiation detectors Radioactive beams Shell model

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Study of the calibration method using the stars measured by the EUSO-TA telescope 37

Study of the calibration method using the stars measured by ...

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37th International Cosmic Ray Conference, ICRC 2021

作者： Plebaniak, Z. Przybylak, M. Barghini, D. Bertaina, M. Bisconti, F. Casolino, M. Gardiol, D. Lipiec, R. Piotrowski, L.W. Shinozaki, K. Szabelski, J. Abdellaoui, G. Abe, S. Adams, J.H. Ahriche, A. Allard, D. Alonso, G. Anchordoqui, L. Anzalone, A. Arnone, E. Asano, K. Attallah, R. Attoui, H. Ave Pernas, M. Bacholle, S. Baláz, J. Bakiri, M. Yashin, I.V. Bartocci, S. Battisti, M. Bayer, J. Beldjilali, B. Belenguer, T. Belkhalfa, N. Bellotti, R. Belov, A. Benmessai, K. Yonetoku, D. Bertone, P. Biermann, P.L. Yoshida, S. Blaksley, C. Blanc, N. Blin-Bondil, S. Bobik, P. Bogomilov, M. Bozzo, E. Briz, S. Bruno, A. Caballero, K.S. Cafagna, F. Cambie, G. Campana, D. Cambié, G. Capdevielle, J.-N. Capel, F. Caramete, A. Caramete, L. Carlson, P. Caruso, R. Yano, H. Cassardo, C. Castellina, A. Catalano, O. Cellino, A. Cerny, K. Chikawa, M. Chiritoi, G. Christl, M.J. Colalillo, R. Conti, L. Cotto, G. Crawford, H.J. Cremonini, R. Creusot, A. de Castro Gónzalez, A. de la Taille, C. del Peral, L. Diaz Damian, A. Diesing, R. Djakonow, A. Djemil, T. Ebersoldt, A. Ebisuzaki, T. Engel, R. Eliasson, L. Eser, J. Fenu, F. Fernández-González, S. Ferrarese, S. Fillapatos, G. Fornaro, C. Fouka, M. Franceschi, A. Franchini, S. Fuglesang, C. Fujii, T. Fukushima, M. Galeotti, P. García-Ortega, E. Young, R. Garipov, G. Gascón, E. Genci, J. Golzio, A. González Alvarado, C. Gorodetzky, P. Green, A. Guarino, F. Guzmán, A. Hachisu, Y. Haungs, A. Hernández Carretero, J. Hulett, L. Ikeda, D. Inoue, N. Inoue, S. Isgrò, F. Itow, Y. Jammer, T. Jeong, S. Joven, E. Judd, E.G. Jochum, J. Kajino, F. Kajino, T. Kalli, S. Kaneko, I. Karadzhov, Y. Kasztelan, M. Katahira, K. Kawai, K. Kawasaki, Y. Kedadra, A. Khales, H. Khrenov, B.A. Kungel, V. Kim, Jeong-Sook Kim, Soon-Wook Kleifges, M. Klimov, P.A. Kolev, D. Kreykenbohm, I. Krizmanic, J.F. Królik, K. Kurihara, Y. Kusenko, A. Kuznetsov, E. Lahmar, H. Lakhdari, F. Dipartimento di Fisica Università di Torino Italy Instituto Nazionale di Fisica Nucleare - Sezione di Torino Italy National Centre for Nuclear Research Lódź Poland RIKEN Wako Japan Instituto Nazionale di Fisica Nucleare - Sezione di Roma Tor Vergata Italy Universita’ di Roma Tor Vergata Dipartimento di Fisica Roma Italy Osservatorio Astrofisico di Torino Istituto Nazionale di Astrofisica Italy Lódź University of Technology Lódź Poland Faculty of Physics University of Warsaw Poland Algiers Algeria Algiers Algeria Dept. of Physics Faculty of Sciences University Badji Mokhtar Annaba Algeria Univ. Constantine I Constantine Algeria Laboratory of Theoretical Physics LPT University of Jijel Jijel Algeria Department of Physics Faculty of Sciences University of M’sila M’sila Algeria Research Unit on Optics and Photonics UROP-CDTA Sétif Algeria Telecom Lab. Faculty of Technology University Abou Bekr Belkaid Tlemcen Algeria St. Kliment Ohridski University of Sofia Bulgaria Joint Laboratory of Optics Palacky University Olomouc Czech Republic Institute of Physics The Czech Academy of Sciences Prague Czech Republic Omega Ecole Polytechnique CNRS IN2P3 Palaiseau France APC Univ Paris Diderot CNRS IN2P3 CEA/Irfu Obs de Paris Sorbonne Paris Cité France IRAP Université de Toulouse CNRS Toulouse France ECAP University of Erlangen-Nuremberg Germany Germany Experimental Physics Institute Kepler Center University of Tübingen Germany Institute for Astronomy and Astrophysics Kepler Center University of Tübingen Germany Istituto Nazionale di Fisica Nucleare - Sezione di Bari Italy Universita’ degli Studi di Bari Aldo Moro INFN - Sezione di Bari Italy Dipartimento di Fisica e Astronomia Universita’ 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 Universita’ di Napoli Federico II

EUSO-TA is a ground-based experiment, placed at Black Rock Mesa of the Telescope Array site as a part of the JEM-EUSO (Joint Experiment Missions for the Extreme Universe Space Observatory) program. The UV fluorescence imaging telescope with a field of view of about 10.6◦ x 10.6◦ consisting of 2304 pixels (36 Multi-Anode Photomultipliers, 64 pixels each) works with 2.5-microsecond time resolution. An experimental setup with two Fresnel lenses allows for measurements of Ultra High Energy Cosmic Rays in parallel with the TA experiment as well as the other sources like flashes of lightning, artificial signals from UV calibration lasers, meteors and stars. Stars increase counts on pixels while crossing the field of view as the point-like sources. In this work, we discuss the method for calibration of EUSO fluorescence detectors based on signals from stars registered by the EUSO-TA experiment during several campaigns. As the star position is known, the analysis of signals gives an opportunity to determine the pointing accuracy of the detector. This can be applied to space-borne or balloon-borne EUSO missions. We describe in details the method of the analysis which provides information about detector parameters like the shape of the point spread function and is the way to perform absolute calibration of EUSO cameras. © Copyright owned by the author(s).

关键词： Stars

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Measurement of ω meson production in pp collisions at = 13 TeV

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Journal of High Energy Physics 2025年第4期2025卷 1-30页

作者： Acharya, S. Adamová, D. Agarwal, A. Aglieri Rinella, G. 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. Alfaro Molina, R. 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. Aphecetche, L. Appelshäuser, H. Arata, C. Arcelli, S. Aresti, M. Arnaldi, R. Arneiro, J. G. M. C. A. Arsene, I. C. Arslandok, M. Augustinus, A. Averbeck, R. Azmi, M. D. Baba, H. Badalà, A. Bae, J. Baek, Y. W. Bai, X. Bailhache, R. Bailung, Y. Bala, R. Balbino, A. Baldisseri, A. Balis, B. Banerjee, D. Banoo, Z. Barbasova, V. Barile, F. Barioglio, L. Barlou, M. Barman, B. Barnaföldi, G. G. Barnby, L. S. Barreau, E. Barret, V. Barreto, L. Bartels, C. Barth, K. Bartsch, E. Bastid, N. Basu, S. Batigne, G. Battistini, D. Batyunya, B. Bauri, D. Bazo Alba, J. L. Bearden, I. G. Beattie, C. Becht, P. Behera, D. Belikov, I. Bell Hechavarria, A. D. C. 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. Besoiu, M. G. Betev, L. Bhaduri, P. P. Bhasin, A. Bhat, M. A. Bhattacharjee, B. Bianchi, L. Bianchi, N. Bielčík, J. Bielčíková, J. Bigot, A. P. Bilandzic, A. Biro, G. Biswas, S. Bize, N. Blair, J. T. Blau, D. Blidaru, M. B. Bluhme, N. Blume, C. Boca, G. Bock, F. Bodova, T. Bok, J. Boldizsár, L. Bombara, M. Bond, P. M. Bonomi, G. Borel, H. Borissov, A. Borquez Carcamo, A. G. Bossi, H. Botta, E. Bouziani, Y. E. M. Bratrud, L. Braun-Munzinger, P. Bregant, M. Broz, M. Bruno, G. E. Buckland, M. D. Budnikov, D. Buesching, H. Bufalino, S. Buhler, P. Burmasov, N. Buthelezi, Z. Bylinkin, A. Bysiak, S. A. Cabanillas Noris, J. C. Cabrera, M. F. T. Cai, M. Caines, H. Caliva, A. Calvo Villar, E. Camacho, J. M. M. Camerini, P. Canedo, F. D. M. Cantway, S. L. Carabas, M. Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento di Fisica dell’Università and Sezione INFN Turin Italy Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN Bologna Italy Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico University of Houston Houston United States Sungkyunkwan University Suwon City Republic of Korea Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany INFN Sezione di Bari Bari Italy Physik Department Technische Universität München Munich Germany High Energy Physics Group Universidad Autónoma de Puebla Puebla Mexico Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania University of Derby Derby United Kingdom Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy INFN Sezione di Bologna Bologna Italy Lawrence Berkeley National Laboratory Berkeley United Sta

The pT-differential cross section of ω meson production in pp collisions at $$ \sqrt{s} $$ = 13 TeV at midrapidity (|y| < 0.5) was measured with the ALICE detector at the LHC, covering an unprecedented transverse-momentum range of 1.6 < pT < 50 GeV/c. The meson is reconstructed via the ω → π+π−π0 decay channel. The results are compared with various theoretical calculations: PYTHIA8.2 with the Monash 2013 tune overestimates the data by up to 50%, whereas good agreement is observed with Next-to-Leading Order (NLO) calculations incorporating ω fragmentation using a broken SU(3) model. The ω/π0 ratio is presented and compared with theoretical calculations and the available measurements at lower collision energies. The presented data triples the pT ranges of previously available measurements. A constant ratio of Cω/π0 = 0.578 ± 0.006 (stat.) ± 0.013 (syst.) is found above a transverse momentum of 4 GeV/c, which is in agreement with previous findings at lower collision energies within the systematic and statistical uncertainties.

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Isospin-density dependent pairing from infinite nuclear matter to finite nuclei

arXiv

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arXiv 2020年

作者： Meng, Xu Zhang, Shisheng Guo, Lin Geng, Lisheng Cao, Ligang 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 Beihan China School of Physics and Microelectronics Zhengzhou University ZhengzhouHenan450001 China College of Science and Technology Beijing Normal University Beijing100875 China

The effective isospin-density dependent pairing interaction (P1) [S. S. Zhang, U. Lombardo and E. G. Zhao, Sci. Chin. Phys. Mech. Astro. 54, 236 (2011)] extracted from neutron pairing gaps for 1S0 in asymmetric nuclear matter calculations [S. S. Zhang, L. G. Cao, U. Lombardo, et al. Phys. Rev. C 81, 044313 (2010)] is employed to study the bulk properties of Ca, Ni, Zr and Sn isotopes. The odd-even mass (OEM) staggering is calculated by the Skyrme Hartree-Fock plus BCS method (SHF + BCS) with the SkP interaction. For comparison, we study two other types of isovector effective pairing interactions. One is also extracted from pairing gaps of infinite nuclear matter by the Brueckner-Hartree-Fock (BHF) method but for free spectrum (P2). The other is obtained by fitting the empirical OEM (P3). An isoscalar effective pairing interaction (P4) is also adopted which is determined by fitting the empirical OEM. We find that interaction P1 can better describe the OEM staggering of Ni, Zr and Sn isotopes by 14.3%, 41%, 30.4% compared with interaction P2, in terms of root mean square deviations to the empirical OEM, respectively. On the other hand, the performance of P1 and P2 is comparable for Ca isotopes. For Ca and Ni isotopes, P1 behaves similarly as P3, but for Zr isotopes P1 is better than P3 by ∼ 34%. Among the four pairing interactions studied, P4 performs the worst. Therefore, one may conclude that for neutron pairings in finite nuclei, the isovector pairings are preferred than the isoscalar one. It is quite interesting to note that the pairing interaction P1 extracted from nuclear matter calculations can describe pairing gaps of finite nuclei as well as or even better than the interaction P3 directly fitted to finite nuclei. Copyright © 2020, The Authors. All rights reserved.

关键词： Isotopes

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Deep learning methods for automatic evaluation of delayed enhancement-MRI. The results of the EMIDEC challenge

arXiv

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arXiv 2021年

作者： Lalande, Alain Chen, Zhihao Pommier, Thibaut Decourselle, Thomas Qayyum, Abdul Salomon, Michel Ginhac, Dominique Skandarani, Youssef Boucher, Arnaud Brahim, Khawla de Bruijne, Marleen Camarasa, Robin Correia, Teresa M. Feng, Xue Girum, Kibrom B. Hennemuth, Anja Huellebrand, Markus Hussain, Raabid Ivantsits, Matthias Ma, Jun Meyer, Craig Sharma, Rishabh Shi, Jixi Tsekos, Nikolaos V. Varela, Marta Wang, Xiyue Yang, Sen Zhang, Hannu Zhang, Yichi Zhou, Yuncheng Zhuang, Xiahai Couturier, Raphael Meriaudeau, Fabrice ImViA laboratory University of Burgundy Dijon France MRI department University Hospital of Dijon Dijon France Femto-ST laboratory University of Franche-Comté Belfort France Cardiology department University Hospital of Dijon Dijon France CASIS Company Quetigny France National Engineering School of Sousse University of Sousse Sousse Tunisia LASEE laboratory National Engineering School of Monastir University of Monastir Monastir Tunisia Biomedical Imaging Group Rotterdam Erasmus MC Rotterdam Netherlands Department of Radiology and Nuclear Medicine Erasmus MC Rotterdam Netherlands Department of Computer Science University of Copenhagen Copenhagen Denmark Centre of Marine Sciences University of Algarve Faro Portugal School of Biomedical Engineering and Imaging Sciences King’s College London London United Kingdom Department of Biomedical Engineering University of Virginia Charlottesville United States Charité – Universitätsmedizin Berlin Berlin Germany Fraunhofer MEVIS Bremen Germany German Centre for Cardiovascular Research Berlin Germany Department of Mathematics Nanjing University of Science and Technology Nanjing China Data Analysis and Intelligent Systems Lab Department of Computer Science University of Houston Houston United States Medical Robotics and Imaging Lab Department of Computer Science University of Houston Houston United States National Heart and Lung Institute Imperial College London London United Kingdom College of Computer Science Sichuan University Chengdu China College of Biomedical Engineering Sichuan University Chengdu China School of Biological Science and Medical Engineering Beihang University Beijing China School of Data Science Fudan University Shanghai China

A key factor for assessing the state of the heart after myocardial infarction (MI) is to measure whether the myocardium segment is viable after reperfusion or revascularization therapy. Delayed enhancement-MRI or DE-MRI, which is performed several minutes after injection of the contrast agent, provides high contrast between viable and nonviable myocardium and is therefore a method of choice to evaluate the extent of MI. To automatically assess myocardial status, the results of the EMIDEC challenge that focused on this task are presented in this paper. The challenge’s main objectives were twofold. First, to evaluate if deep learning methods can distinguish between normal and pathological cases. Second, to automatically calculate the extent of myocardial infarction. The publicly available database consists of 150 exams divided into 50 cases with normal MRI after injection of a contrast agent and 100 cases with myocardial infarction (and then with a hyperenhanced area on DE-MRI), whatever their inclusion in the cardiac emergency department. Along with MRI, clinical characteristics are also provided. The obtained results issued from several works show that the automatic classification of an exam is a reachable task (the best method providing an accuracy of 0.92), and the automatic segmentation of the myocardium is possible. However, the segmentation of the diseased area needs to be improved, mainly due to the small size of these areas and the lack of contrast with the surrounding structures. © 2021, CC BY-NC-SA.

关键词： Cardiology

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