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arXiv 2023年

作者： Liu, Xunchuan Liu, Tie Zhu, Lei Garay, Guido Liu, Hong-Li Goldsmith, Paul Evans, Neal Kim, Kee-Tae Liu, Sheng-Yuan Xu, Fengwei Lu, Xing Tej, Anandmayee Mai, Xiaofeng Bronfman, Leonardo Li, Shanghuo Mardones, Diego Stutz, Amelia Tatematsu, Kenichi Wang, Ke Zhang, Qizhou Qin, Sheng-Li Zhou, Jianwen Luo, Qiuyi Zhang, Siju Cheng, Yu He, Jinhua Gu, Qilao Li, Ziyang Zhang, Zhenying Zhang, Suinan Saha, Anindya Dewangan, Lokesh Sanhueza, Patricio Shen, Zhiqiang Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai200030 China Chinese Academy of Sciences South America Center for Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing100101 China Departamento de Astronomía Universidad de Chile Las Condes Santiago7591245 Chile School of Physics and Astronomy Yunnan University Kunming650091 China Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive PasadenaCA91109 United States Department of Astronomy The University of Texas AustinTX78712-1205 United States Korea Astronomy and Space Science Institute 776 Daedeokdae-ro Yuseong-gu Daejeon34055 Korea Republic of Institute of Astronomy and Astrophysics Academia Sinica Roosevelt Road Taipei10617 Taiwan Kavli Institute for Astronomy and Astrophysics Peking University Haidian District Beijing100871 China Department of Astronomy School of Physics Peking University Beijing100871 China Indian Institute of Space Science and Technology Kerala Thiruvananthapuram695 547 India Max Planck Institute for Astronomy Königstuhl 17 HeidelbergD-69117 Germany Departamento de Astronomía Universidad de Concepción Casilla 160-C Concepción Chile Nobeyama Radio Observatory National Astronomical Observatory of Japan National Institutes of Natural Sciences 462-2 Nobeyama Minamimaki Minamisaku Nagano384-1305 Japan Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 Bonn53125 Germany School of Astronomy and Space Sciences University of Chinese Academy of Sciences Beijing100049 China National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Yunnan Observatories Chinese Academy of Sciences Yunnan Kunming650216 China Physical Research Laboratory Navrangpura Ahmedabad380 009 India GUAS Astronomical Science Program SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan

This paper presents an overview of the QUARKS survey, which stands for ‘Querying Underlying mechanisms of massive star formation with ALMA-Resolved gas Kinematics and Structures’. The QUARKS survey is observing 139 massive clumps covered by 156 pointings at ALMA Band 6 (λ ∼ 1.3 mm). In conjunction with data obtained from the ALMA-ATOMS survey at Band 3 (λ ∼ 3 mm), QUARKS aims to carry out an unbiased statistical investigation of massive star formation process within protoclusters down to a scale of 1000 au. This overview paper describes the observations and data reduction of the QUARKS survey, and gives a first look at an exemplar source, the mini-starburst Sgr B2(M). The wide-bandwidth (7.5 GHz) and high-angular-resolution (∼ 0.3′′) observations of the QUARKS survey allow to resolve much more compact cores than could be done by the ATOMS survey, and to detect previously unrevealed fainter filamentary structures. The spectral windows cover transitions of species including CO, SO, N2D+, SiO, H30α, H2CO, CH3CN and many other complex organic molecules, tracing gas components with different temperatures and spatial extents. QUARKS aims to deepen our understanding of several scientific topics of massive star formation, such as the mass transport within protoclusters by (hub-)filamentary structures, the existence of massive starless cores, the physical and chemical properties of dense cores within protoclusters, and the feedback from already formed high-mass young protostars. Copyright © 2023, The Authors. All rights reserved.

关键词： Data reduction

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Measurement of the branching fraction of Λc+→pω decay at Belle

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physical Review D 2021年第7期104卷 072008-072008页

作者： S. X. Li L. K. Li C. P. Shen I. Adachi H. Aihara S. Al Said D. M. Asner T. Aushev P. Behera K. Belous J. Bennett M. Bessner V. Bhardwaj B. Bhuyan T. Bilka J. Biswal A. Bobrov D. Bodrov J. Borah A. Bozek M. Bračko P. Branchini T. E. Browder A. Budano M. Campajola D. Červenkov M.-C. Chang P. Chang A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe S. Das G. De Nardo G. De Pietro R. Dhamija F. Di Capua Z. Doležal T. V. Dong D. Epifanov T. Ferber B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Giri P. Goldenzweig B. Golob E. Graziani T. Gu Y. Guan K. Gudkova C. Hadjivasiliou S. Halder O. Hartbrich K. Hayasaka H. Hayashii W.-S. Hou C.-L. Hsu T. Iijima K. Inami A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs S. Jia Y. Jin K. K. Joo A. B. Kaliyar K. H. Kang Y. Kato H. Kichimi C. H. Kim D. Y. Kim K.-H. Kim K. T. Kim Y.-K. Kim K. Kinoshita P. Kodyš T. Konno A. Korobov S. Korpar E. Kovalenko P. Križan R. Kroeger P. Krokovny R. Kumar K. Kumara Y.-J. Kwon Y.-T. Lai J. S. Lange M. Laurenza S. C. Lee J. Li Y. B. Li L. Li Gioi J. Libby K. Lieret D. Liventsev C. MacQueen M. Masuda T. Matsuda M. Merola K. Miyabayashi R. Mizuk R. Mussa M. Nakao A. Natochii L. Nayak M. Nayak M. Niiyama N. K. Nisar S. Nishida S. Ogawa H. Ono P. Oskin P. Pakhlov G. Pakhlova T. Pang H. Park S.-H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik V. Popov E. Prencipe M. T. Prim M. Röhrken A. Rostomyan N. Rout G. Russo D. Sahoo S. Sandilya L. Santelj T. Sanuki V. Savinov G. Schnell C. Schwanda Y. Seino K. Senyo M. E. Sevior M. Shapkin C. Sharma J.-G. Shiu F. Simon A. Sokolov E. Solovieva M. Starič Z. S. Stottler J. F. Strube M. Sumihama T. Sumiyoshi W. Sutcliffe M. Takizawa U. Tamponi K. Tanida F. Tenchini M. Uchida T. Uglov Y. Unno K. Uno S. Uno P. Urquijo Y. Usov S. E. Vahsen R. Van Tonder G. Varner A. Vinokurova E. Waheed C. H. Wang E. Wang M.-Z. Wang P. Wang E. Won B. D. Yabsley W. Yan S. B. Yang H. Ye J. Yelton J. H. Yin Y. Yusa Z. P. Zhang V. Zhilich V. Zhuk Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics Fudan University Shanghai 200443 University of Cincinnati Cincinnati Ohio 45221 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 National Research University Higher School of Economics Moscow 101000 Indian Institute of Technology Madras Chennai 600036 Institute for High Energy Physics Protvino 142281 University of Mississippi University Mississippi 38677 University of Hawaii Honolulu Hawaii 96822 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 Faculty of Chemistry and Chemical Engineering University of Maribor 2000 Maribor INFN—Sezione di Roma Tre I-00146 Roma INFN—Sezione di Napoli I-80126 Napoli Università di Napoli Federico II I-80126 Napoli Department of Physics Fu Jen Catholic University Taipei 24205 Department of Physics National Taiwan University Taipei 10617 National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 Korea Institute of Science and Technology Information Daejeon 34141 Yonsei University Seoul 03722 Gyeongsang National University Jinju 52828 Sungkyunkwan University Suwon 16419 Indian Institute of Technolo

Using 980.6 fb−1 of data collected with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we present a measurement of the branching fraction of the singly Cabibbo-suppressed decay Λc+→pω. A clear Λc+ signal is observed for Λc+→pω with a statistical significance of 9.1 standard deviations, and we measure the ratio of branching fractions B(Λc+→pω)/B(Λc+→pK−π+)=(1.32±0.12(stat)±0.10(syst))×10−2, from which we infer the branching fraction B(Λc+→pω)=(8.27±0.75(stat)±0.62(syst)±0.42(ref))×10−4. The first quoted uncertainty is statistical, the second systematic, and the third from the reference mode Λc+→pK−π+.

关键词： Branching fraction Charmed baryons Lepton colliders

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Topological Lifshitz transition of the intersurface Fermi-arc loop in NbIrTe4

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physical Review B 2020年第8期102卷 085126-085126页

作者： S. A. Ekahana Y. W. Li Y. Sun H. Namiki H. F. Yang J. Jiang L. X. Yang W. J. Shi C. F. Zhang D. Pei C. Chen T. Sasagawa C. Felser B. H. Yan Z. K. Liu Y. L. Chen Department of Physics University of Oxford Oxford OX1 3PU United Kingdom Swiss Light Source Paul Scherrer Institute CH-5232 Villigen Switzerland Max Planck Institute for Chemical Physics of Solids D-01187 Dresden Germany Materials and Structures Laboratory Tokyo Institute of Technology Yokohama Kanagawa 226-8503 Japan School of Physical Science and Technology ShanghaiTech University and CAS-Shanghai Science Research Center Shanghai 200031 People's Republic of China Advanced Light Source Lawrence Berkeley National Laboratory Berkeley California 94720 USA State Key Laboratory of Low Dimensional Quantum Physics Department of Physics and Collaborative Innovation Center of Quantum Matter Tsinghua University Beijing 100084 People's Republic of China College of Advanced Interdisciplinary Studies and Interdisciplinary Center for Quantum Information National University of Defense Technology Changsha 410073 People's Republic of China ShanghaiTech Laboratory for Topological Physics Shanghai 200031 People's Republic of China John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts 02138 USA Department of Physics Harvard University Cambridge Massachusetts 02138 USA Weizmann Institute of Science Herzl St 234 Rehovot 76100 Israel

Surface arcs (SAs) or Fermi arcs connecting pairs of bulk Weyl points with opposite chiralities are the signatures of Weyl semimetals in angle-resolved photoemission spectroscopy (ARPES) studies. The nontrivial topology of the bulk band structure guarantees the existence of these exotic Fermi arcs with connectivity that is strongly dependent on the surface. It has been theoretically proposed and experimentally confirmed that Fermi arcs at opposite surfaces can complete an unusual closed cyclotron orbit called a Weyl orbit, which leads to various intriguing transport properties. In this paper, a systematic ARPES study on opposite terminations (001) of type-II Weyl semimetal NbIrTe4 reveals different Fermi arc connections which result in a unique closed intersurface Fermi arc loop configurations (combining both projections of SAs) containing two pairs of Weyl points. In particular, the top surface ARPES data and corresponding ab initio calculation suggests that a topological Lifshitz transition occurs by tuning the chemical potential. SA rewiring on the top surface opens the intersurface arc loop at the Weyl node energy level into an open line, challenging the close-orbit description and leading to an unexplored scenario. Our results demonstrate the intrinsic alteration of Fermi arc connections and propose NbIrTe4 as a potential platform to examine Fermi-arc related phenomenon.

关键词： Electronic structure Fermi surface Weyl fermions Topological materials Weyl semimetal Angle-resolved photoemission spectroscopy

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Coupling of fully symmetric As phonon to magnetism in Ba(Fe1−xAux)2As2

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physical Review B 2020年第1期102卷 014501-014501页

作者： S.-F. Wu W.-L. Zhang L. Li H.-B. Cao H.-H. Kung A. S. Sefat H. Ding P. Richard G. Blumberg Department of Physics and Astronomy Rutgers University Piscataway New Jersey 08854 USA Materials Science & Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100190 China Institut quantique Université de Sherbrooke 2500 Boulevard de l'Université Sherbrooke Québec J1K 2R1 Canada National Institute of Chemical Physics and Biophysics 12618 Tallinn Estonia

We study the coupling of the fully symmetric vibration mode of arsenic atoms to magnetism in a Ba(Fe1−xAux)2As2 system by polarization-resolved Raman spectroscopy and neutron diffraction. In this system, there are two phase transitions: a tetragonal-to-orthorhombic structural phase transition at temperature TS and a magnetic phase transition into collinear spin-density wave (SDW) state at temperature TN (≤TS). TS and TN almost coincide in the pristine compound, whereas they differ by as much as 8 K for compounds with dilute gold substitution for iron. Raman coupling to the Ag(As) phonon is forbidden for the XY scattering geometry in the tetragonal phase above TS, whereas it becomes allowed in the orthorhombic phase below TS: The emerging mode's intensity indicates the lattice orthorhombicity. We find that upon cooling below TS, first, weak Ag(As) phonon mode intensity appears in the XY scattering geometry spectra; however, the mode's intensity is significantly enhanced in the magnetic phase below TN. The Ag(As) phonon also shows an asymmetric line shape below TN and an anomalous linewidth broadening upon Au doping. We describe the anomalous behavior of the Ag(As) mode in the XY scattering geometry using a Fano model involving the Ag(As) phonon interacting with the B2g(D4h)-symmetry-like electron-hole continuum. We conclude that the temperature dependence of light coupling amplitude to the Ag(As) phonon follows the evolution of the magnetic order parameter M(T). We propose that the intensity enhancement of the Ag(As) phonon in the XY scattering geometry below TN is due to electronic anisotropy induced by the collinear SDW order parameter.

关键词： Antiferromagnetism Electron-phonon coupling Unconventional superconductors Raman spectroscopy

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A Highly Active Molybdenum Carbide Catalyst with Dynamic Carbon Flux for Reverse Water-Gas Shift Reaction

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Angewandte Chemie 2024年第6期137卷

作者： Mengtao Zhang Yuchen Zhu Jie Yan Junzhong Xie Tao Yu Mi Peng Jiayun Zhao Yao Xu Aowen Li ChunJiang Jia Lin He Meng Wang Wu Zhou Rongming Wang Hong Jiang Chuan Shi Jose Rodriguez Ding Ma Beijing National Laboratory for Molecular Sciences New Cornerstone Laboratory College of Chemistry and Molecular Engineering Peking University Beijing 100871 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China State Key Laboratory of Fine Chemicals College of Chemical Engineering Dalian University of Technology Dalian 116024 China School of Physical Sciences and CAS Key Laboratory of Vacuum Physics University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory for Colloid and Interface Chemistry Key Laboratory of Special Aggregated Materials School of Chemistry and Chemical Engineering Shandong University Jinan 250100 China State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences Lanzhou 730000 China Chemistry Division Building 555 Brookhaven National Laboratory Post Office Box 5000 Upton NY 11973-5000 USA

Molybdenum carbide has been reported as an efficient and stable catalyst for reverse water-gas shift (RWGS) reaction. The conventional understanding of the mechanism suggests domination of the surface phenomena, with only surface or subsurface layers partaking in the catalytic cycle. In this study, we presented a highly active MoC catalyst from carburization process, which showed a mass-specific reaction rate over 260 μm with dynamic carbon flux in the bulk phase of the catalyst. Through Isotopic Temperature-programmed Reaction (ITPR) analysis and Environmental Transmission Electron Microscopy (ETEM), we discerned dynamic carbon flow circulating between the α-MoC bulk phase and the gas phase reactants under the RWGS reaction atmosphere. This circulation, essential to maintaining the structural stability of the metastable α-MoC and its ultra-high reactivity, is accompanied by thorough carbon component exchange among the bulk, the surface and the gas-phase reactants during the reaction process.

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Improved ultraviolet photodetection and oxygen gas sensing performance using CeO 2 rare-earth oxide thin films deposited on GaN

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Physica B: Condensed Matter 2025年

作者： Nanda Kumar Reddy Nallabala K. Rahim Bakash Rakha Saputra T.V.K. Karthik M. Ramprasad Reddy G. Gopi Krishna N. Ravi Kevin Rueda Castellanos Venkata Krishnaiah Kummara Gedi Sreedevi Salh Alhammadi Vasudeva Reddy Minnam Reddy Sunil Singh Kushvaha Department of Physics Madanapalle Institute of Technology and Science Madanapalle 517 325 A.P India Department of Electronic Engineering Ming Chi University of Technology New Taipei City 243303 Taiwan Tecnologico de Monterrey School of Engineering and Sciences Department of Mechanics and Advanced Materials Avenida Lago de Guadalupe KM 3.5 Margarita Maza de Ju´arez 52926 Ciudad Lopez Mateos Mexico Department of EEE Aditya College of Engineering Madanapalle-517 325 A.P India The Apollo University Chittoor 517 127 India Department of Physics Rajeev Gandhi Memorial College of Engineering and Technology Nandyal 518501 Andhra Pradesh India Department of Material Physics Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Thandalam Chennai 602 105 India School of Chemical Engineering Yeungnam University Gyeongsan 38541 Republic of Korea CSIR- National Physical Laboratory Dr. K.S. Krishnan Road New Delhi 110012 India

In recent[ years, high- k dielectric oxide-based metal-insulator-semiconductor (MIS) heterojunctions gain increasing attention due to their potential for dual functionality in ultraviolet (UV) photodetectors (PDs) and gas sensors, offering promising applications in next-generation optoelectronic and sensing technologies. This work presents the fabrication and performance of a vertical Au/CeO 2 /GaN heterojunction device for both UV photodetection and oxygen sensing applications. Grazing incidence X-ray diffraction (GIXRD) confirms the formation of cubic-phase CeO 2 , while field emission scanning electron microscopy (FESEM) reveals a uniform distribution of CeO 2 clusters on the GaN substrate, indicating a well-developed surface morphology. X-ray photoelectron spectroscopy (XPS) verifies the elemental composition and chemical states of Ce 3+ and O 2- . The photodetection properties are evaluated through I-V (dark and UV-illuminated), external quantum efficiency (EQE), detectivity (D*), responsivity and time-resolved (I-t) measurements. Under 365 nm illumination at 3 V bias, the Au/CeO 2 /GaN device post-annealed at 500 °C exhibits a responsivity of 13 A/W, an EQE ranging from 4.8x10 2 to 1.1x10 3 % and a D* of 1.4x10 14 Jones. Time-resolved measurements at 0 V show a response time of 80 ms and a recovery time of 480 ms for the 500 °C post-annealed device. For gas sensing, the same heterojunction undergoes exposure to 100 % O 2 , 100 % CO 2 , 1000 ppm NO and 500 ppm SO 2 . The 500 °C post-annealed device demonstrates enhanced sensitivity to oxygen with response values of 0.47, 0.72, 0.77 and 0.82 for 25 %, 50 %, 75 % and 100 % O 2 concentrations, respectively. Time-dependent measurements under 3 V bias yield a response time of 40 s and a recovery time of 47 s. These results confirm the effectiveness of the cost-efficient conventional e-beam evaporation method in producing high-performance CeO 2 -based Au/CeO 2 /GaN heterojunctions, highlighting their potential for in

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Evidence for X(3872) in Pb-Pb Collisions and Studies of its Prompt Production at sNN=5.02 TeV

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physical Review Letters 2022年第3期128卷 032001-032001页

作者： A. M. Sirunyan A. Tumasyan W. Adam F. Ambrogi T. Bergauer M. Dragicevic J. Erö A. Escalante Del Valle M. Flechl R. Frühwirth M. Jeitler N. Krammer I. Krätschmer D. Liko T. Madlener I. Mikulec N. Rad J. Schieck R. Schöfbeck M. Spanring W. Waltenberger C.-E. Wulz M. Zarucki V. Drugakov V. Mossolov J. Suarez Gonzalez M. R. Darwish E. A. De Wolf D. Di Croce X. Janssen T. Kello A. Lelek M. Pieters H. Rejeb Sfar H. Van Haevermaet P. Van Mechelen S. Van Putte N. Van Remortel F. Blekman E. S. Bols S. S. Chhibra J. D’Hondt J. De Clercq D. Lontkovskyi S. Lowette I. Marchesini S. Moortgat Q. Python S. Tavernier W. Van Doninck P. Van Mulders D. Beghin B. Bilin B. Clerbaux G. De Lentdecker H. Delannoy B. Dorney L. Favart A. Grebenyuk A. K. Kalsi L. Moureaux A. Popov N. Postiau E. Starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom T. Cornelis D. Dobur I. Khvastunov M. Niedziela C. Roskas K. Skovpen M. Tytgat W. Verbeke B. Vermassen M. Vit G. Bruno C. Caputo P. David C. Delaere M. Delcourt A. Giammanco V. Lemaitre J. Prisciandaro A. Saggio P. Vischia J. Zobec G. A. Alves G. Correia Silva C. Hensel A. Moraes E. Belchior Batista Das Chagas W. Carvalho J. Chinellato E. Coelho E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza H. Malbouisson J. Martins D. Matos Figueiredo M. Medina Jaime M. Melo De Almeida C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva P. Rebello Teles L. J. Sanchez Rosas A. Santoro A. Sznajder M. Thiel E. J. Tonelli Manganote F. Torres Da Silva De Araujo A. Vilela Pereira C. A. Bernardes L. Calligaris T. R. Fernandez Perez Tomei E. M. Gregores D. S. Lemos P. G. Mercadante S. F. Novaes Sandra S. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. Shopova G. Sultanov M. Bonchev A. Dimitrov T. Ivanov L. Litov B. Pavlov P. Petkov A. Petrov W. Fang X. Gao L. Yuan M. Ahmad Z. Hu Y. Wang G. M. Chen H. S. Chen M. Chen C. H. Jiang D. Leggat H. Liao Z. Liu A. Spiezia J. Tao E. Yazgan H. Zhang S. Zhang J. Zhao A. Agapitos Y. Ban G. Ch Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Department of Physics Tsinghua University Beijing China University of Virginia Charlottesville Virginia USA Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Un

The first evidence for X(3872) production in relativistic heavy ion collisions is reported. The X(3872) production is studied in lead-lead (Pb-Pb) collisions at a center-of-mass energy of sNN=5.02 TeV per nucleon pair, using the decay chain X(3872)→J/ψπ+π−→μ+μ−π+π−. The data were recorded with the CMS detector in 2018 and correspond to an integrated luminosity of 1.7 nb−1. The measurement is performed in the rapidity and transverse momentum ranges |y|<1.6 and 15

关键词： Particle & resonance production Quark-gluon plasma Relativistic heavy-ion collisions Hadron colliders

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Measurement of the masses and widths of the Σc(2455)+ and Σc(2520)+ baryons

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physical Review D 2021年第5期104卷 052003-052003页

作者： J. Yelton I. Adachi J. K. Ahn H. Aihara S. Al Said D. M. Asner H. Atmacan V. Aulchenko T. Aushev R. Ayad V. Babu S. Bahinipati P. Behera K. Belous J. Bennett M. Bessner V. Bhardwaj B. Bhuyan T. Bilka J. Biswal A. Bozek M. Bračko P. Branchini T. E. Browder A. Budano M. Campajola D. Červenkov M.-C. Chang P. Chang V. Chekelian A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho S.-J. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro S. Cunliffe S. Das N. Dash G. De Nardo G. De Pietro R. Dhamija F. Di Capua J. Dingfelder Z. Doležal T. V. Dong D. Epifanov T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig E. Graziani T. Gu K. Gudkova C. Hadjivasiliou T. Hara O. Hartbrich K. Hayasaka H. Hayashii W.-S. Hou C.-L. Hsu K. Inami A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs S. Jia Y. Jin K. K. Joo A. B. Kaliyar K. H. Kang Y. Kato C. Kiesling C. H. Kim D. Y. Kim K.-H. Kim S. H. Kim Y.-K. Kim K. Kinoshita P. Kodyš T. Konno A. Korobov S. Korpar E. Kovalenko P. Križan R. Kroeger P. Krokovny T. Kuhr R. Kulasiri K. Kumara Y.-J. Kwon J. S. Lange M. Laurenza S. C. Lee J. Li L. K. Li Y. B. Li L. Li Gioi J. Libby K. Lieret D. Liventsev C. MacQueen M. Masuda T. Matsuda D. Matvienko J. T. McNeil M. Merola K. Miyabayashi R. Mizuk G. B. Mohanty T. J. Moon R. Mussa M. Nakao Z. Natkaniec A. Natochii L. Nayak M. Nayak M. Niiyama N. K. Nisar S. Nishida S. Ogawa H. Ono Y. Onuki P. Oskin P. Pakhlov G. Pakhlova S. Pardi H. Park S.-H. Park S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik E. Prencipe M. T. Prim A. Rostomyan N. Rout G. Russo D. Sahoo Y. Sakai S. Sandilya A. Sangal L. Santelj T. Sanuki V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior M. Shapkin C. Sharma C. P. Shen J.-G. Shiu A. Sokolov E. Solovieva M. Starič Z. S. Stottler M. Sumihama K. Sumisawa T. Sumiyoshi M. Takizawa U. Tamponi K. Tanida Y. Tao F. Tenchini K. Trabelsi M. Uchida T. Uglov Y. Unno S. Uno P. Urquijo Y. Usov S. E. Vahsen R. Van Tonder G. Varner A. Vinokurova E. Waheed C. H. Wa University of Florida Gainesville Florida 32611 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 Korea University Seoul 02841 Department of Physics University of Tokyo Tokyo 113-0033 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Department of Physics Faculty of Science King Abdulaziz University Jeddah 21589 Brookhaven National Laboratory Upton New York 11973 University of Cincinnati Cincinnati Ohio 45221 Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 National Research University Higher School of Economics Moscow 101000 Deutsches Electronen-Synchrotron 22607 Hamburg Indian Institute of Technology Bhubaneswar Satya Nagar 751007 Indian Institute of Technology Madras Chennai 600036 Institute for High Energy Physics Protvino 142281 University of Mississippi University Mississippi 38677 University of Hawaii Honolulu Hawaii 96822 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 Faculty of Chemistry and Chemical Engineering University of Maribor 2000 Maribor INFN—Sezione di Roma Tre I-00146 Roma INFN—Sezione di Napoli I-80126 Napoli Università di Napoli Federico II I-80126 Napoli Department of Physics Fu Jen Catholic University Taipei 24205 Department of Physics National Taiwan University Taipei 10617 Max-Planck-Institut für Physik 80805 München National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 34141 Yonsei University Seoul 03722 Gyeo

Using 980 fb−1 of data collected with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we report the measurements of the masses, and the first measurements of the instrinsic widths, of the Σc(2455)+ and Σc(2520)+ charmed baryons. We find M(Σc(2455)+)−M(Λc+)=166.17±0.05−0.07+0.16 MeV/c2, Γ(Σc(2455)+)=2.3±0.3±0.3 MeV/c2, M(Σc(2520)+)−M(Λc+)=230.9±0.5−0.1+0.5 MeV/c2, and Γ(Σc(2520)+)=17.2−2.1−0.7+2.3+3.1 MeV/c2, where the uncertainties are statistical and systematic, respectively. These measurements can be used to test models of the underlying quark structure of the Σc states.

关键词： Particle decays

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Effects of Varying the Amount of Reduced Graphene Oxide Loading on the Humidity Sensing Performance of Zinc Oxide/Reduced Graphene Oxide Nanocomposites on Cellulose Filter Paper

SSRN

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SSRN 2022年

作者： Subki, A.S.R.A. Mamat, Mohamad Hafiz Bin Musa, M.Z. Abdullah, M.H. Banu, I.B. Shameem Vasimalai, N. Ahmad, M.K. Nayan, Nafarizal Bakar, Suriani Abu Mohamad, A. Birowosuto, Muhammad Danang Rusop, M. NANO-ElecTronic Centre School of Electrical Engineering College of Engineering Universiti Teknologi MARA Selangor Shah Alam40450 Malaysia Faculty of Electrical and Electronic Engineering Technology Universiti Teknikal Malaysia Melaka Hang Tuah Jaya Durian Tunggal Melaka76100 Malaysia Selangor Shah Alam40450 Malaysia Center for Electrical Engineering Studies Universiti Teknologi MARA Cawangan Pulau Pinang Permatang Pauh Pulau Pinang13500 Malaysia School of Physical and Chemical Sciences B.S. Abdur Rahman Crescent Institute of Science & Technology Vandalur Chennai600 048 India Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia Johor Batu Pahat86400 Malaysia Nanotechnology Research Centre Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tanjung Malim Perak35900 Malaysia Research Techno Plaza 50 Nanyang Drive Border X Block Level 6 Singapore637553 Singapore Department of Physics India Nanotechnology Research Centre Malaysia

This work presents a nanocomposite-based humidity sensor based on zinc oxide nanostructured powder (ZNP) nanoparticles that achieves a maximum enhancement in the humidity sensing performance at room temperature due to the introduction of different amounts of reduced graphene oxide (rGO) loading from 0.5wt.% to 2.0wt.%. The rGO/ZNP (rZNP) nanocomposite-based humidity sensor was fabricated by using cellulose filter paper as a substrate and clear paper glue as a binder through a facile brush printing method. FESEM, EDS, XRD, HRTEM, XPS, and Raman spectroscopy were employed to investigate the properties of the rZNP nanocomposites. The presence of an rZNP nanocomposite with quasi-spherical ZNP nanoparticles that are securely attached and anchored with rGO sheets was confirmed through HRTEM micrographs. Raman spectroscopy analyses confirm and validate the formation of hybrid nanostructures with the presence of distinctive bands related to ZNP and rGO. The presence of oxygen vacancy defects and oxygen-related chemical bonds on the surface of the rZNP nanocomposite, which yield the enhanced sensor performance, is revealed by XPS analysis. The rZNP nanocomposite-based humidity sensor with 1.0wt.% rGO loading had a maximum sensing response of 99.42% and exhibited the highest sensitivity towards humidity changes (29.2 MΩ/%RH), which was substantially better than the other samples. © 2022, The Authors. All rights reserved.

关键词： II-VI semiconductors

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Ce-doped titanium oxide composite films with enhanced water vapor barrier and light-blocking properties for encapsulation

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Colloids and Surfaces A: Physicochemical and Engineering Aspects 2025年 724卷

作者： Yunle Yao Wei Zhang Rui Pan Mengru Liu Hua Cheng Yi Gong Lin Chen Xian Zhang Meng Xue Xingyou Tian Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei Anhui 230031 People's Republic of China University of Science and Technology of China Hefei Anhui 230026 People's Republic of China School of Chemical and Pharmaceutical Engineering Hefei Normal University Anhui 230601 People's Republic of China China Europe Electronic Materials International Innovation Center Co. Ltd Hefei Anhui 230093 People's Republic of China Guangdong Banggu Film Coatings Innovation Academy Co Ltd Nanxiong S12400 People's Republic of China

This study synthesized a Ce-doped titanium oxide composite film based on Polyethylene Terephthalate (PET@Ce-TiO 2 ) using the sol-gel method and developed a high-barrier composite packaging film for continuous encapsulation. Owing to the Lewis acidity of oxygen vacancies, the titanium oxide film demonstrates enhanced water vapor barrier and adsorption capabilities. Additionally, Ce doping increases the oxygen vacancy concentration on the TiO 2 surface, promoting greater water molecule adsorption and reducing their diffusion coefficient. As a result, the composite film achieves a water vapor barrier performance nearly four times improvement to that of pristine PET films. Furthermore, Ce-doped titanium oxide films demonstrate enhanced long-term water stability and superior light-blocking capacity relative to undoped TiO 2 films, attributable to the formation of novel chemical configurations within the composite structure. The composite film prepared using this innovative method to encapsulate copper foil maintains excellent chemical stability with virtually no signs of oxidation on its surface even after more than 336 h under 60 °C and 90 %RH. This study presents a simple yet effective method for improving the water vapor barrier performance and light-blocking capacity of polymer substrates by constructing high performance composite film encapsulation layers.

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