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New Limit for Neutrinoless Double-Beta Decay of Mo100 from the CUPID-Mo Experiment

Physical Review Letters 2021年第18期126卷 181802-181802页

作者： E. Armengaud C. Augier A. S. Barabash F. Bellini G. Benato A. Benoît M. Beretta L. Bergé J. Billard Yu. A. Borovlev Ch. Bourgeois V. B. Brudanin P. Camus L. Cardani N. Casali A. Cazes M. Chapellier F. Charlieux D. Chiesa M. de Combarieu I. Dafinei F. A. Danevich M. De Jesus T. Dixon L. Dumoulin K. Eitel F. Ferri B. K. Fujikawa J. Gascon L. Gironi A. Giuliani V. D. Grigorieva M. Gros E. Guerard D. L. Helis H. Z. Huang R. Huang J. Johnston A. Juillard H. Khalife M. Kleifges V. V. Kobychev Yu. G. Kolomensky S. I. Konovalov A. Leder P. Loaiza L. Ma E. P. Makarov P. de Marcillac R. Mariam L. Marini S. Marnieros D. Misiak X.-F. Navick C. Nones E. B. Norman V. Novati E. Olivieri J. L. Ouellet L. Pagnanini P. Pari L. Pattavina B. Paul M. Pavan H. Peng G. Pessina S. Pirro D. V. Poda O. G. Polischuk S. Pozzi E. Previtali Th. Redon A. Rojas S. Rozov C. Rusconi V. Sanglard J. A. Scarpaci K. Schäffner B. Schmidt Y. Shen V. N. Shlegel B. Siebenborn V. Singh C. Tomei V. I. Tretyak V. I. Umatov L. Vagneron M. Velázquez B. Welliver L. Winslow M. Xue E. Yakushev M. Zarytskyy A. S. Zolotarova IRFU CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France Univ Lyon Université Lyon 1 CNRS/IN2P3 IP2I-Lyon F-69622 Villeurbanne France National Research Centre Kurchatov Institute Institute of Theoretical and Experimental Physics 117218 Moscow Russia Dipartimento di Fisica Sapienza Università di Roma Piazzale Aldo Moro 2 I-00185 Rome Italy INFN Sezione di Roma Piazzale Aldo Moro 2 I-00185 Rome Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi (AQ) Italy CNRS-Néel 38042 Grenoble Cedex 9 France University of California Berkeley California 94720 USA Université Paris-Saclay CNRS/IN2P3 IJCLab 91405 Orsay France Nikolaev Institute of Inorganic Chemistry 630090 Novosibirsk Russia Laboratory of Nuclear Problems JINR 141980 Dubna Moscow region Russia Dipartimento di Fisica Università di Milano-Bicocca I-20126 Milano Italy INFN Sezione di Milano-Bicocca I-20126 Milano Italy IRAMIS CEA Université Paris-Saclay F-91191 Gif-sur-Yvette France Institute for Nuclear Research of NASU 03028 Kyiv Ukraine Karlsruhe Institute of Technology Institute for Astroparticle Physics 76021 Karlsruhe Germany Lawrence Berkeley National Laboratory Berkeley California 94720 USA Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) Fudan University Shanghai 200433 People’s Republic of China Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Karlsruhe Institute of Technology Institute for Data Processing and Electronics 76021 Karlsruhe Germany INFN Gran Sasso Science Institute I-67100 L’Aquila Italy Physik Department Technische Universität München Garching D-85748 Germany Department of Modern Physics University of Science and Technology of China Hefei 230027 People’s Republic of China LSM Laboratoire Souterrain de Modane 73500 Modane France Department of Physics and Astronomy University of South Carolina Columbia South Carolina 29208 USA Université Grenoble Alpes CNRS Grenoble INP SIMAP 38402 Saint Martin d’Héres Fr

The CUPID-Mo experiment at the Laboratoire Souterrain de Modane (France) is a demonstrator for CUPID, the next-generation ton-scale bolometric 0νββ experiment. It consists of a 4.2 kg array of 20 enriched Li2Mo100O4 scintillating bolometers to search for the lepton-number-violating process of 0νββ decay in Mo100. With more than one year of operation (Mo100 exposure of 1.17 kg×yr for physics data), no event in the region of interest and, hence, no evidence for 0νββ is observed. We report a new limit on the half-life of 0νββ decay in Mo100 of T1/2>1.5×1024 yr at 90% C.I. The limit corresponds to an effective Majorana neutrino mass ⟨mββ⟩<(0.31–0.54) eV, dependent on the nuclear matrix element in the light Majorana neutrino exchange interpretation.

关键词： Neutrinoless double beta decay Nuclear structure & decays Majorana neutrinos Neutrinos

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Effect of gradient temperature rolling on microstructure of initial pass of ultra-heavy plates

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IOP Conference Series: Earth and Environmental science 2019年第2期233卷

作者： Bo Xu Hongyuan Fu Xin Zhang Shouyuan Bian Ling Yan Shengli Li College of Metallurgy and Energy North China University of Science and Technology Hebei Tangshan 063210 China Key Laboratory of metallurgical engineering University of Science and Technology Liaoning Anshan Liaoning 114051 China State key laboratory of metal materials for Marine equipment and their application Anshan Iron and Steel Group Corporation Anshan 114021 China

In this paper, the gradient temperature rolling (GTR) method is used to establish the rolling model of the first two passes by using the deform-3D finite element software. The variation of temperature field, stress field, static recrystallization and average grain size of ultra-heavy plate slab under different conditions is systematically studied. Test result shows that the water cooling between the passes can form a temperature gradient layer (about 30mm) of a certain thickness on the surface of the rolled blank, the deformation of the core can be effectively improved during the rolling process, the static recrystallized grain size and average grain size of the surface of the rolled part are more obvious than the uniform temperature rolling; in addition, since the surface temperature of the water-cooled product is low, the amount of deformation is small, and metastable dynamic recrystallization does not occur.

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Title-guided encoding for keyphrase generation

arXiv

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arXiv 2018年

作者： Chen, Wang Gao, Yifan Zhang, Jiani King, Irwin Lyu, Michael R. Department of Computer Science and Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong Shenzhen Key Laboratory of Rich Media Big Data Analytics and Application Shenzhen Research Institute Chinese University of Hong Kong Shenzhen China

keyphrase generation (KG) aims to generate a set of keyphrases given a document, which is a fundamental task in natural language processing (NLP). Most previous methods solve this problem in an extractive manner, while recently, several attempts are made under the generative setting using deep neural networks. However, the state-of-the-art generative methods simply treat the document title and the document main body equally, ignoring the leading role of the title to the overall document. To solve this problem, we introduce a new model called Title-Guided Network (TG-Net) for automatic keyphrase generation task based on the encoderdecoder architecture with two new features: (i) the title is additionally employed as a query-like input, and (ii) a titleguided encoder gathers the relevant information from the title to each word in the document. Experiments on a range of KG datasets demonstrate that our model outperforms the state-of-the-art models with a large margin, especially for documents with either very low or very high title length ratios. Copyright © 2018, The Authors. All rights reserved.

关键词： Deep neural networks

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Hybrid and integrated schottky diode based 330GHz and 420GHz subharmonic mixers

Hybrid and integrated schottky diode based 330GHz and 420GHz...

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2017 International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2017

作者： Zhang, Bo Liu, Ge Zhang, Lisen Xing, Dong Wang, Junlong Fan, Yong School of Electronic Engineering Universtity of Electronic Science and Technology of China Chengdu Sichuan611731 China National Key Laboratory of Application Specific Integrated Circuits Hebei Semiconductor Research Institute Shijiazhuang050000 China

ISBN: (纸本)9780996007856

This paper describes the planar schottky diode based subharmonic mixers currently being developed at the EHF key laboratory of Fundamental science of Universtity of Electronic science and Technology of China. Hybrid and integrated GaAs Schottky diode based 330GHz and 420GHz subharmonic mixers are designed, fabricated and measured. Test results show that the minimum conversion loss of 330GHz monolithic integrated sub-harmonic mixer is 10.4dB at 328GHz, SSB conversion loss is less than 14.7dB from 320GHz to 340GHz when the LO power is 5mW;the minimum conversion loss of the 420GHz hybrid sub-harmonic mixer is 9.99dB at 406GHz, the SSB conversion loss is less than 15dB from 380GHz to 430GHz when the local power is 6dBm;the minimum conversion loss of the 420GHz heterogeneous integrated sub-harmonic mixer is 10dB at 419GHz and 422GHz, SSB conversion loss is less than 14.7dB over 400GHz to 440GHz frequency range when the LO power is 5.2dBm at 210GHz. © 2017 Applied Computational Electromagnetics Society.

关键词： Gallium arsenide

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scTenifoldXct: A semi-supervised method for predicting cell-cell interactions and mapping cellular communication graphs

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Cell systems 2023年第4期14卷 302-311.e4页

作者： Yongjian Yang Guanxun Li Yan Zhong Qian Xu Yu-Te Lin Cristhian Roman-Vicharra Robert S Chapkin James J Cai Department of Electrical and Computer Engineering Texas A&M University College Station TX 77843 USA. Department of Statistics Texas A&M University College Station TX 77843 USA. Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE School of Statistics East China Normal University 3663 North Zhongshan Road Shanghai 200062 China. Department of Veterinary Integrative Biosciences Texas A&M University College Station TX 77843 USA. Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei Taiwan. Department of Nutrition and the Program in Integrative Nutrition & Complex Diseases Texas A&M University College Station TX 77843 USA. Electronic address: r-chapkin@tamu.edu. Department of Electrical and Computer Engineering Texas A&M University College Station TX 77843 USA Department of Veterinary Integrative Biosciences Texas A&M University College Station TX 77843 USA Interdisciplinary Program of Genetics Texas A&M University College Station TX 77843 USA. Electronic address: jcai@tamu.edu.

We present scTenifoldXct, a semi-supervised computational tool for detecting ligand-receptor (LR)-mediated cell-cell interactions and mapping cellular communication graphs. Our method is based on manifold alignment, using LR pairs as inter-data correspondences to embed ligand and receptor genes expressed in interacting cells into a unified latent space. Neural networks are employed to minimize the distance between corresponding genes while preserving the structure of gene regression networks. We apply scTenifoldXct to real datasets for testing and demonstrate that our method detects interactions with high consistency compared with other methods. More importantly, scTenifoldXct uncovers weak but biologically relevant interactions overlooked by other methods. We also demonstrate how scTenifoldXct can be used to compare different samples, such as healthy vs. diseased and wild type vs. knockout, to identify differential interactions, thereby revealing functional implications associated with changes in cellular communication status.

关键词： cell-cell interaction cellular communication gene regression network machine learning manifold alignment neural networks scRNA-seq single-cell RNA sequencing

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Multifunctional Tubular Organic Cage‐Supported Ultrafine Palladium Nanoparticles for Sequential Catalysis

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Angewandte Chemie 2019年第50期131卷

作者： Nana Sun Chiming Wang Hailong Wang Le Yang Peng Jin Wei Zhang Jianzhuang Jiang Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of Chemistry University of Science and Technology Beijing Beijing 100083 China School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China Department of Chemistry University of Colorado Boulder Colorado 80309 USA

The imine condensation reaction of 5,5′‐(benzo[ c ][1,2,5]thiadiazole‐4,7‐diyl)diisophthalaldehyde with cyclohexanediamine resulted in a shape‐persistent multifunctional tubular organic cage (MTC1). It exhibits selective fluorescence sensing towards divalent Pd ions with a very low detection limit (38 ppb), suggesting effective complexation between these two species. Subsequent reduction of MTC1 and Pd(OAc) 2 with NaBH 4 afforded a cage‐supported catalyst with well‐dispersed ultrafine Pd nanoparticles (NPs) in a narrow size distribution (1.9±0.4 nm), denoted as Pd@MTC1‐1/5. Such ultrafine Pd NPs in Pd@MTC1‐1/5, in cooperation with photocatalytically active MTC1, enable efficient sequential reactions involving visible light‐induced aerobic hydroxylation of 4‐nitrophenylboronic acid to 4‐nitrophenol and the following hydride reduction with NaBH 4 . This is the first example of a multifunctional organic cage capable of sensing, directing nanoparticle growth, and catalyzing sequential reactions.

关键词： Palladium Photokatalyse Poröse Organische Käfige Sequentielle Katalyse Ultrafeine Nanopartikel

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Observation of the decay ψ(3686)→Σ0Σ¯0ω

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Physical Review D 2025年第9期111卷 092007-092007页

作者： M. Ablikim M. N. Achasov P. Adlarson X. C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai M. H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin X. Y. Chai J. F. Chang G. R. Che Y. Z. Che G. Chelkov C. H. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. K. Chen S. K. Choi X. Chu G. Cibinetto F. Cossio J. Cottee-Meldrum J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding Y. X. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Y. Y. Duan Z. H. Duan P. Egorov G. F. Fan J. J. Fan Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng L. Feng Q. X. Feng Y. T. Feng M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao X. B. Gao Y. N. Gao Y. Y. Gao Yang Gao S. Garbolino I. Garzia P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen J. D. Gong L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han F. Hanisch K. D. Hao X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou H. M. Hu J. F. Hu Q. P. Hu S. L. Hu T. Hu Y. Hu Z. M. Hu G. S. Huang K. X. Huang L. Q. Huang P. Huang X. T. Huang Y. P. Huang Y. S. Huang T. Hussain N. Hüsken N. in der Wiesche J. Jackson S. Janchiv Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. J. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Also at the Novosibirsk State University Novosibirsk 630090 Russia. Uppsala University Box 516 SE-75120 Uppsala Sweden Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Deceased. Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia Peking University Beijing 100871 People’s Republic of China Also at State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China. University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Mongolian Academy of Sciences Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy INFN Sezione di Ferrara I-44122 Ferrara Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Lanzhou University Lanzhou 730000 People’s Republic of China Also at MOE Frontiers Science Center for Rare Isotopes Lanzhou University Lanzhou 730000 People’s Republic of China. Also at Lanzhou Center for Theoretical Physics Lanzhou University Lanzhou 730000 People’s Republic of China. Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai Uni

Using a dataset of (27.12±0.14)×108 ψ(3686) events collected by the BESIII detector operating at the BEPCII collider, we report the first observation of the decay ψ(3686)→Σ0Σ¯0ω with a statistical significance of 8.9σ. The measured branching fraction is (1.24±0.16stat±0.11sys)×10−5, where the first uncertainty is statistical and the second is systematic. Additionally, we investigate potential intermediate states in the invariant mass distributions of Σ0ω, Σ¯0ω and Σ0Σ¯0. A hint of a resonance is observed in the invariant mass distribution of MΣ0(Σ¯0)ω, located around 2.06 GeV/c2, with a significance of 2.5σ.

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Observation of an Axial-Vector State in the Study of the Decay ψ(3686)→ϕηη′

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Physical Review Letters 2025年第19期134卷 191901-191901页

作者： M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin J. F. Chang W. L. Chang G. R. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi X. Chu G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Z. H. Duan P. Egorov Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng K. Fischer M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia L. Ge P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan Z. L. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang T. Hussain F. Hölzken N. Hüsken N. in der Wiesche M. Irshad J. Jackson S. Janchiv J. H. Jeong Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf M. Kuessner X. Kui N. Kumar A. Ku Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Also at the Novosibirsk State University Novosibirsk 630090 Russia. Uppsala University Box 516 SE-75120 Uppsala Sweden Bochum Ruhr-University D-44780 Bochum Germany Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China Also at State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China. University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 People’s Republic of China Also at the Moscow Institute of Physics and Technology Moscow 141700 Russia. China University of Geosciences Wuhan 430074 People’s Republic of China Soochow Univer

Using (2712.4±14.3)×106 ψ(3686) events collected with the BESIII detector at BEPCII, a partial wave analysis of the decay ψ(3686)→ϕηη′ is performed with the covariant tensor approach. In addition to the established states h1(1900) and ϕ(2170), an axial-vector state with a mass near 2.3 GeV/c2 is observed for the first time. Its mass and width are measured to be 2316±9stat±30syst MeV/c2 and 89±15stat±26syst MeV, respectively. The product branching fractions of B[ψ(3686)→X(2300)η′]B[X(2300)→ϕη] and B[ψ(3686)→X(2300)η]B[X(2300)→ϕη′] are determined to be (4.8±1.3stat±0.7syst)×10−6 and (2.2±0.7stat±0.7syst)×10−6, respectively. The branching fraction B[ψ(3686)→ϕηη′] is measured for the first time to be (3.14±0.17stat±0.24syst)×10−5. The first uncertainties are statistical and the second are systematic.

关键词： Stresses

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A 620-690 GHz Sub-Harmonic Mixer Based on Monolithic GaAs Integrated Schottky Diodes

A 620-690 GHz Sub-Harmonic Mixer Based on Monolithic GaAs In...

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International Applied Computational Electromagnetics Society Symposium in China

作者： Dong Feng Ji Bo Zhang Lisen Zhang Dong Xing Yong Fan EHF Key Laboratory of Science University of Electronic Science and Technology of China National Key Laboratory of Application Specific Integrated Circuit Hebei Semiconductor Research Institute

ISBN: (纸本)9781509043118

In this paper, a 620-690GHz sub-harmonic mixer using monolithic GaAs integrated schottky diodes is presented in order to remove the mismatch caused by manual assembly of the flip chip diode. The monolithic microwave integrated circuit integrates a Schottky anti-parallel diodes pair in a longitudinal configuration. We mostly analyzed the influence caused by diode position offset and conductive adhesive thickness on the performance of the mixer, which shows the necessity of monolithic integration technology. In 620GHz to 690 GHz simulated results of the mixer had achieved less than 9dB of conversion loss and 920K for DSB noise temperature within the bandwidth.

关键词： Terahertz Monolithic GaAs Integrated Schottky diodes Mixer Schottky diodes Mixer terahertz Flip-chip devices sub-harmonic conversion loss diodes Monolithic microwave integrated circuits

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Observation of D→K¯1(1270)μ+νμ and test of lepton flavor universality with D→K¯1(1270)ℓ+νℓ

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Physical Review D 2025年第7期111卷 L071101-L071101页

作者： M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Q. An Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin X. Y. Chai J. F. Chang G. R. Che Y. Z. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Y. Y. Duan Z. H. Duan P. Egorov Y. H. Fan J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao X. B. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia L. Ge P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han F. Hanisch X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu S. L. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang Y. S. Huang T. Hussain F. Hölzken N. Hüsken N. in der Wiesche J. Jackson S. Janchiv J. H. Jeong Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf Institute of High Energy Physics Beijing 100049 People’s Republic of China Budker Institute of Nuclear Physics SB RAS (BINP) Novosibirsk 630090 Russia Also at the Novosibirsk State University Novosibirsk 630090 Russia. Uppsala University Box 516 SE-75120 Uppsala Sweden Bochum Ruhr-University D-44780 Bochum Germany Zhengzhou University Zhengzhou 450001 People’s Republic of China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany University of Turin and INFN University of Turin I-10125 Turin Italy INFN I-10125 Turin Italy University of Science and Technology of China Hefei 230026 People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049 Hefei 230026 People’s Republic of China Deceased. Southeast University Nanjing 211100 People’s Republic of China Joint Institute for Nuclear Research 141980 Dubna Moscow region Russia INFN Sezione di Ferrara I-44122 Ferrara Italy Peking University Beijing 100871 People’s Republic of China Also at State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 People’s Republic of China. University of Chinese Academy of Sciences Beijing 100049 People’s Republic of China National Centre for Nuclear Research Warsaw 02-093 Poland Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar 13330 Mongolia INFN Laboratori Nazionali di Frascati I-00044 Frascati Italy Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA University of Muenster Wilhelm-Klemm-Strasse 9 48149 Muenster Germany Wuhan University Wuhan 430072 People’s Republic of China Turkish Accelerator Center Particle Factory Group Istinye University 34010 Istanbul Turkey Nankai University Tianjin 300071 People’s Republic of China Also at the Moscow Institute of Physics and Technology Moscow 141700 Russia. China University of Geosciences Wuhan 430074 People’s Republic of China Soochow University Suzhou 215006 People’s Republic of China Henan

By analyzing 7.93 fb−1 of e+e− collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector operated at the BEPCII collider, we report the observation of the semimuonic decays of D+→K¯1(1270)0μ+νμ and D0→K1(1270)−μ+νμ with statistical significances of 12.5σ and 6.0σ, respectively. Their decay branching fractions are determined to be B[D+→K¯1(1270)0μ+νμ]=(2.36±0.20−0.27+0.18±0.48)×10−3 and B[D0→K1(1270)−μ+νμ]=(0.78±0.11−0.09+0.05±0.15)×10−3, where the first and second uncertainties are statistical and systematic, respectively, and the third originates from the input branching fraction of K¯1(1270)0→K−π+π0 or K1(1270)−→K−π+π−. Combining our branching fractions with the previous measurements of B[D+→K¯1(1270)0e+νe] and B[D0→K1(1270)−e+νe], we determine the branching fraction ratios to be B[D+→K¯1(1270)0μ+νμ]/B[D+→K¯1(1270)0e+νe]=1.03±0.14−0.15+0.11 and B[D0→K1(1270)−μ+νμ]/B[D0→K1(1270)−e+νe]=0.74±0.13−0.13+0.08. Using the branching fractions measured in this work and the world-average lifetimes of the D+ and D0 mesons, we determine the semimuonic partial decay width ratio to be Γ[D+→K¯1(1270)0μ+νμ]/Γ[D0→K1(1270)−μ+νμ]=1.22±0.10−0.09+0.06, which is consistent with unity as predicted by isospin conservation.

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