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26 results on '"Sun, Henan"'

1. K-stars LDP: A Novel Framework for (p, q)-clique Enumeration under Local Differential Privacy

Author

Sun, Henan, Wu, Zhengyu, Li, Rong-Hua, Wang, Guoren, and Li, Zening

Subjects
Computer Science - Cryptography and Security, Computer Science - Computers and Society, Computer Science - Data Structures and Algorithms
Abstract

(p,q)-clique enumeration on a bipartite graph is critical for calculating clustering coefficient and detecting densest subgraph. It is necessary to carry out subgraph enumeration while protecting users' privacy from any potential attacker as the count of subgraph may contain sensitive information. Most recent studies focus on the privacy protection algorithms based on edge LDP (Local Differential Privacy). However, these algorithms suffer a large estimation error due to the great amount of required noise. In this paper, we propose a novel idea of k-stars LDP and a novel k-stars LDP algorithm for (p, q)-clique enumeration with a small estimation error, where a k-stars is a star-shaped graph with k nodes connecting to one node. The effectiveness of edge LDP relies on its capacity to obfuscate the existence of an edge between the user and his one-hop neighbors. This is based on the premise that a user should be aware of the existence of his one-hop neighbors. Similarly, we can apply this premise to k-stars as well, where an edge is a specific genre of 1-stars. Based on this fact, we first propose the k-stars neighboring list to enable our algorithm to obfuscate the existence of k-stars with Warner' s RR. Then, we propose the absolute value correction technique and the k-stars sampling technique to further reduce the estimation error. Finally, with the two-round user-collector interaction mechanism, we propose our k-stars LDP algorithm to count the number of (p, q)-clique while successfully protecting users' privacy. Both the theoretical analysis and experiments have showed the superiority of our algorithm over the algorithms based on edge LDP.

Published
2024

2. AdaFGL: A New Paradigm for Federated Node Classification with Topology Heterogeneity

Author

Li, Xunkai, Wu, Zhengyu, Zhang, Wentao, Sun, Henan, Li, Rong-Hua, and Wang, Guoren

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence, Computer Science - Databases, Computer Science - Social and Information Networks
Abstract

Recently, Federated Graph Learning (FGL) has attracted significant attention as a distributed framework based on graph neural networks, primarily due to its capability to break data silos. Existing FGL studies employ community split on the homophilous global graph by default to simulate federated semi-supervised node classification settings. Such a strategy assumes the consistency of topology between the multi-client subgraphs and the global graph, where connected nodes are highly likely to possess similar feature distributions and the same label. However, in real-world implementations, the varying perspectives of local data engineering result in various subgraph topologies, posing unique heterogeneity challenges in FGL. Unlike the well-known label Non-independent identical distribution (Non-iid) problems in federated learning, FGL heterogeneity essentially reveals the topological divergence among multiple clients, namely homophily or heterophily. To simulate and handle this unique challenge, we introduce the concept of structure Non-iid split and then present a new paradigm called \underline{Ada}ptive \underline{F}ederated \underline{G}raph \underline{L}earning (AdaFGL), a decoupled two-step personalized approach. To begin with, AdaFGL employs standard multi-client federated collaborative training to acquire the federated knowledge extractor by aggregating uploaded models in the final round at the server. Then, each client conducts personalized training based on the local subgraph and the federated knowledge extractor. Extensive experiments on the 12 graph benchmark datasets validate the superior performance of AdaFGL over state-of-the-art baselines. Specifically, in terms of test accuracy, our proposed AdaFGL outperforms baselines by significant margins of 3.24\% and 5.57\% on community split and structure Non-iid split, respectively., Comment: Accepted by ICDE 2024

Published
2024

3. Breaking the Entanglement of Homophily and Heterophily in Semi-supervised Node Classification

Author

Sun, Henan, Li, Xunkai, Wu, Zhengyu, Su, Daohan, Li, Rong-Hua, and Wang, Guoren

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence, Computer Science - Social and Information Networks
Abstract

Recently, graph neural networks (GNNs) have shown prominent performance in semi-supervised node classification by leveraging knowledge from the graph database. However, most existing GNNs follow the homophily assumption, where connected nodes are more likely to exhibit similar feature distributions and the same labels, and such an assumption has proven to be vulnerable in a growing number of practical applications. As a supplement, heterophily reflects dissimilarity in connected nodes, which has gained significant attention in graph learning. To this end, data engineers aim to develop a powerful GNN model that can ensure performance under both homophily and heterophily. Despite numerous attempts, most existing GNNs struggle to achieve optimal node representations due to the constraints of undirected graphs. The neglect of directed edges results in sub-optimal graph representations, thereby hindering the capacity of GNNs. To address this issue, we introduce AMUD, which quantifies the relationship between node profiles and topology from a statistical perspective, offering valuable insights for Adaptively Modeling the natural directed graphs as the Undirected or Directed graph to maximize the benefits from subsequent graph learning. Furthermore, we propose Adaptive Directed Pattern Aggregation (ADPA) as a new directed graph learning paradigm for AMUD. Empirical studies have demonstrated that AMUD guides efficient graph learning. Meanwhile, extensive experiments on 16 benchmark datasets substantiate the impressive performance of ADPA, outperforming baselines by significant margins of 3.96., Comment: Accepted by ICDE 2024

Published
2023

4. Research on Construction of Open Online Courses System for Marine Engineering Major

Author

Wang, Haoliang, Wang, Baojun, Wu, Haojun, Peng, Zhouhua, Zhao, Junhao, Sun, Henan, Zhang, Hongpeng, Striełkowski, Wadim, Editor-in-Chief, Black, Jessica M., Series Editor, Butterfield, Stephen A., Series Editor, Chang, Chi-Cheng, Series Editor, Cheng, Jiuqing, Series Editor, Dumanig, Francisco Perlas, Series Editor, Al-Mabuk, Radhi, Series Editor, Scheper-Hughes, Nancy, Series Editor, Urban, Mathias, Series Editor, Webb, Stephen, Series Editor, Salleh, Kahirol Mohd, editor, Mohammad Ismail, Muhammad Ismath Ramzy, editor, and Yuan, Lizhuang, editor

Published
2023
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12. Iris Recognition Based on Non-local Comparisons

Author

Sun, henan, Tan, Tieniu, Wang, Yunhong, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Li, Stan Z., editor, Lai, Jianhuang, editor, Tan, Tieniu, editor, Feng, Guocan, editor, and Wang, Yunhong, editor

Published
2005
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17. Aqueous-Processed Polymer/Nanocrystal Hybrid Solar Cells with Double-Side Bulk Heterojunction

Author

Jin, Gan, primary, Chen, Nannan, additional, Zeng, Qingsen, additional, Liu, Fangyuan, additional, Yuan, Wei, additional, Xiang, Siyuan, additional, Feng, Tanglue, additional, Du, Xiaohang, additional, Ji, Tianjiao, additional, Wang, Lijing, additional, Wang, Yaohua, additional, Sun, Henan, additional, Sun, Haizhu, additional, and Yang, Bai, additional

Published
2017
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18. Study of $J/ψ\to p\bar{p}$ and $J/ψ\to n\bar{n}$

Author

BESIII Collaboration, M. Ablikim(Institute of High Energy Physics, Beijing, P. R. China), M. N. Achasov(G.I. Budker Institute of Nuclear Physics SB RAS), D. J. Ambrose(University of Rochester, Rochester, New York, USA), F. F. An(Institute of High Energy Physics, Beijing, P. R. China), Q. An(University of Science and Technology of China, Hefei, P. R. China), Z. H. An(Institute of High Energy Physics, Beijing, P. R. China), J. Z. Bai(Institute of High Energy Physics, Beijing, P. R. China), R. B. Ferroli(INFN Laboratori Nazionali di Frascati, Frascati, Italy), Y. Ban(Peking University, Beijing, P. R. China), J. Becker(Bochum Ruhr-University, Bochum, Germany), N. Berger(Institute of High Energy Physics, Beijing, P. R. China), M. B. Bertani(INFN Laboratori Nazionali di Frascati, Frascati, Italy), J. M. Bian(University of Minnesota, Minneapolis, MN, USA), E. Boger(20, a), O. Bondarenko(KVI/University of Groningen, Groningen, The Netherlands), I. Boyko(Joint Institute for Nuclear Research, Dubna, Russia), R. A. Briere(Carnegie Mellon University, Pittsburgh, PA, USA), V. Bytev(Joint Institute for Nuclear Research, Dubna, Russia), X. Cai(Institute of High Energy Physics, Beijing, P. R. China), A. C. Calcaterra(INFN Laboratori Nazionali di Frascati, Frascati, Italy), G. F. Cao(Institute of High Energy Physics, Beijing, P. R. China), J. F. Chang(Institute of High Energy Physics, Beijing, P. R. China), G. Chelkov(20, a), G. Chen(Institute of High Energy Physics, Beijing, P. R. China), H. S. Chen(Institute of High Energy Physics, Beijing, P. R. China), J. C. Chen(Institute of High Energy Physics, Beijing, P. R. China), M. L. Chen(Institute of High Energy Physics, Beijing, P. R. China), S. J. Chen(Nanjing University, Nanjing, P. R. China), Y. Chen(Institute of High Energy Physics, Beijing, P. R. China), Y. B. Chen(Institute of High Energy Physics, Beijing, P. R. China), H. P. Cheng(Huangshan College, Huangshan, P. R. China), Y. P. Chu(Institute of High Energy Physics, Beijing, P. R. China), D. Cronin-Hennessy(University of Minnesota, Minneapolis, MN, USA), H. L. Dai(Institute of High Energy Physics, Beijing, P. R. China), J. P. Dai(Institute of High Energy Physics, Beijing, P. R. China), D. Dedovich(Joint Institute for Nuclear Research, Dubna, Russia), Z. Y. Deng(Institute of High Energy Physics, Beijing, P. R. China), A. Denig(Johannes Gutenberg University of Mainz, Mainz, Germany), I. Denysenko(20, b), M. Destefanis(University of Turin and INFN, Turin, Italy), W. M. Ding(Shandong University, Jinan, P. R. China), Y. Ding(Liaoning University, Shenyang, P. R. China), L. Y. Dong(Institute of High Energy Physics, Beijing, P. R. China), M. Y. Dong(Institute of High Energy Physics, Beijing, P. R. China), S. X. Du(Zhengzhou University, Zhengzhou, P. R. China), J. Fang(Institute of High Energy Physics, Beijing, P. R. China), S. S. Fang(Institute of High Energy Physics, Beijing, P. R. China), L. Fava(44, c), F. Feldbauer(Bochum Ruhr-University, Bochum, Germany), C. Q. Feng(University of Science and Technology of China, Hefei, P. R. China), C. D. Fu(Institute of High Energy Physics, Beijing, P. R. China), J. L. Fu(Nanjing University, Nanjing, P. R. China), Y. Gao(Tsinghua University, Beijing, P. R. China), C. Geng(University of Science and Technology of China, Hefei, P. R. China), K. Goetzen(GSI Helmholtzcentre for Heavy Ion Research GmbH, Darmstadt, Germany), W. X. Gong(Institute of High Energy Physics, Beijing, P. R. China), W. Gradl(Johannes Gutenberg University of Mainz, Mainz, Germany), M. Greco(University of Turin and INFN, Turin, Italy), M. H. Gu(Institute of High Energy Physics, Beijing, P. R. China), Y. T. Gu(GuangXi University, Nanning, P.R.China), Y. H. Guan(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), A. Q. Guo(Nankai University, Tianjin, P. R. China), L. B. Guo(Nanjing Normal University, Nanjing, P. R. China), Y. P. Guo(Nankai University, Tianjin, P. R. China), Y. L. Han(Institute of High Energy Physics, Beijing, P. R. China), X. Q. Hao(Institute of High Energy Physics, Beijing, P. R. China), F. A. Harris(University of Hawaii, Honolulu, Hawaii, USA), K. L. He(Institute of High Energy Physics, Beijing, P. R. China), M. He(Institute of High Energy Physics, Beijing, P. R. China), Z. Y. He(Nankai University, Tianjin, P. R. China), T. Held(Bochum Ruhr-University, Bochum, Germany), Y. K. Heng(Institute of High Energy Physics, Beijing, P. R. China), Z. L. Hou(Institute of High Energy Physics, Beijing, P. R. China), H. M. Hu(Institute of High Energy Physics, Beijing, P. R. China), J. F. Hu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), T. Hu(Institute of High Energy Physics, Beijing, P. R. China), B. Huang(Institute of High Energy Physics, Beijing, P. R. China), G. M. Huang(Huazhong Normal University, Wuhan, P. R. China), J. S. Huang(Henan Normal University, Xinxiang, P. R. China), X. T. Huang(Shandong University, Jinan, P. R. China), Y. P. Huang(Institute of High Energy Physics, Beijing, P. R. China), T. Hussain(University of the Punjab, Lahore, Pakistan), C. S. Ji(University of Science and Technology of China, Hefei, P. R. China), Q. Ji(Institute of High Energy Physics, Beijing, P. R. China), X. B. Ji(Institute of High Energy Physics, Beijing, P. R. China), X. L. Ji(Institute of High Energy Physics, Beijing, P. R. China), L. K. Jia(Institute of High Energy Physics, Beijing, P. R. China), L. L. Jiang(Institute of High Energy Physics, Beijing, P. R. China), X. S. Jiang(Institute of High Energy Physics, Beijing, P. R. China), J. B. Jiao(Shandong University, Jinan, P. R. China), Z. Jiao(Huangshan College, Huangshan, P. R. China), D. P. Jin(Institute of High Energy Physics, Beijing, P. R. China), S. Jin(Institute of High Energy Physics, Beijing, P. R. China), F. F. Jing(Tsinghua University, Beijing, P. R. China), N. Kalantar-Nayestanaki(KVI/University of Groningen, Groningen, The Netherlands), M. Kavatsyuk(KVI/University of Groningen, Groningen, The Netherlands), W. Kuehn(Universitaet Giessen, Giessen, Germany), W. Lai(Institute of High Energy Physics, Beijing, P. R. China), J. S. Lange(Universitaet Giessen, Giessen, Germany), J. K. C. Leung(The University of Hong Kong, Pokfulam, Hong Kong), C. H. Li(Institute of High Energy Physics, Beijing, P. R. China), Cheng Li(University of Science and Technology of China, Hefei, P. R. China), Cui Li(University of Science and Technology of China, Hefei, P. R. China), D. M. Li(Zhengzhou University, Zhengzhou, P. R. China), F. Li(Institute of High Energy Physics, Beijing, P. R. China), G. Li(Institute of High Energy Physics, Beijing, P. R. China), H. B. Li(Institute of High Energy Physics, Beijing, P. R. China), J. C. Li(Institute of High Energy Physics, Beijing, P. R. China), K. Li(Hangzhou Normal University, Hangzhou, P. R. China), Lei Li(Institute of High Energy Physics, Beijing, P. R. China), N. B. Li(Nanjing Normal University, Nanjing, P. R. China), Q. J. Li(Institute of High Energy Physics, Beijing, P. R. China), S. L. Li(Institute of High Energy Physics, Beijing, P. R. China), W. D. Li(Institute of High Energy Physics, Beijing, P. R. China), W. G. Li(Institute of High Energy Physics, Beijing, P. R. China), X. L. Li(Shandong University, Jinan, P. R. China), X. N. Li(Institute of High Energy Physics, Beijing, P. R. China), X. Q. Li(Nankai University, Tianjin, P. R. China), X. R. Li(Seoul National University, Seoul, Korea), Z. B. Li(Sun Yat-Sen University, Guangzhou, P. R. China), H. Liang(University of Science and Technology of China, Hefei, P. R. China), Y. F. Liang(Sichuan University, Chengdu, P. R. China), Y. T. Liang(Universitaet Giessen, Giessen, Germany), G. R. Liao(Tsinghua University, Beijing, P. R. China), X. T. Liao(Institute of High Energy Physics, Beijing, P. R. China), B. J. Liu(Institute of High Energy Physics, Beijing, P. R. China), C. L. Liu(Carnegie Mellon University, Pittsburgh, PA, USA), C. X. Liu(Institute of High Energy Physics, Beijing, P. R. China), C. Y. Liu(Institute of High Energy Physics, Beijing, P. R. China), F. H. Liu(Shanxi University, Taiyuan, P. R. China), Fang Liu(Institute of High Energy Physics, Beijing, P. R. China), Feng Liu(Huazhong Normal University, Wuhan, P. R. China), H. Liu(Shanxi University, Taiyuan, P. R. China), H. B. Liu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), H. H. Liu(Henan University of Science and Technology, Luoyang, P. R. China), H. M. Liu(Institute of High Energy Physics, Beijing, P. R. China), H. W. Liu(Institute of High Energy Physics, Beijing, P. R. China), J. P. Liu(Wuhan University, Wuhan, P. R. China), Kun Liu(Peking University, Beijing, P. R. China), Kai Liu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), K. Y. Liu(Liaoning University, Shenyang, P. R. China), P. L. Liu(Shandong University, Jinan, P. R. China), S. B. Liu(University of Science and Technology of China, Hefei, P. R. China), X. Liu(Institute of High Energy Physics, Beijing, P. R. China), X. H. Liu(Institute of High Energy Physics, Beijing, P. R. China), Y. B. Liu(Nankai University, Tianjin, P. R. China), Y. Liu(Institute of High Energy Physics, Beijing, P. R. China), Z. A. Liu(Institute of High Energy Physics, Beijing, P. R. China), Zhiqiang Liu(Institute of High Energy Physics, Beijing, P. R. China), Zhiqing Liu(Institute of High Energy Physics, Beijing, P. R. China), H. Loehner(KVI/University of Groningen, Groningen, The Netherlands), G. R. Lu(Henan Normal University, Xinxiang, P. R. China), H. J. Lu(Huangshan College, Huangshan, P. R. China), J. G. Lu(Institute of High Energy Physics, Beijing, P. R. China), Q. W. Lu(Shanxi University, Taiyuan, P. R. China), X. R. Lu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), Y. P. Lu(Institute of High Energy Physics, Beijing, P. R. China), C. L. Luo(Nanjing Normal University, Nanjing, P. R. China), M. X. Luo(Zhejiang University, Hangzhou, P. R. China), T. Luo(University of Hawaii, Honolulu, Hawaii, USA), X. L. Luo(Institute of High Energy Physics, Beijing, P. R. China), M. Lv(Institute of High Energy Physics, Beijing, P. R. China), C. L. Ma(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), F. C. Ma(Liaoning University, Shenyang, P. R. China), H. L. Ma(Institute of High Energy Physics, Beijing, P. R. China), Q. M. Ma(Institute of High Energy Physics, Beijing, P. R. China), S. Ma(Institute of High Energy Physics, Beijing, P. R. China), T. Ma(Institute of High Energy Physics, Beijing, P. R. China), X. Y. Ma(Institute of High Energy Physics, Beijing, P. R. China), Y. Ma(Institute of High Energy Physics, Beijing, P. R. China), F. E. Maas(Helmholtz Institute Mainz, Mainz, Germany), M. Maggiora(University of Turin and INFN, Turin, Italy), Q. A. Malik(University of the Punjab, Lahore, Pakistan), H. Mao(Institute of High Energy Physics, Beijing, P. R. China), Y. J. Mao(Peking University, Beijing, P. R. China), Z. P. Mao(Institute of High Energy Physics, Beijing, P. R. China), J. G. Messchendorp(KVI/University of Groningen, Groningen, The Netherlands), J. Min(Institute of High Energy Physics, Beijing, P. R. China), T. J. Min(Institute of High Energy Physics, Beijing, P. R. China), R. E. Mitchell(Indiana University, Bloomington, Indiana, USA), X. H. Mo(Institute of High Energy Physics, Beijing, P. R. China), C. Morales Morales(Helmholtz Institute Mainz, Mainz, Germany), C. Motzko(Bochum Ruhr-University, Bochum, Germany), N. Yu. Muchnoi(G.I. Budker Institute of Nuclear Physics SB RAS), Y. Nefedov(Joint Institute for Nuclear Research, Dubna, Russia), C. Nicholson(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), I. B. Nikolaev(G.I. Budker Institute of Nuclear Physics SB RAS), Z. Ning(Institute of High Energy Physics, Beijing, P. R. China), S. L. Olsen(Seoul National University, Seoul, Korea), Q. Ouyang(Institute of High Energy Physics, Beijing, P. R. China), S. P. Pacetti(18, d), J. W. Park(Seoul National University, Seoul, Korea), M. Pelizaeus(University of Hawaii, Honolulu, Hawaii, USA), K. Peters(GSI Helmholtzcentre for Heavy Ion Research GmbH, Darmstadt, Germany), J. L. Ping(Nanjing Normal University, Nanjing, P. R. China), R. G. Ping(Institute of High Energy Physics, Beijing, P. R. China), R. Poling(University of Minnesota, Minneapolis, MN, USA), E. Prencipe(Johannes Gutenberg University of Mainz, Mainz, Germany), C. S. J. Pun(The University of Hong Kong, Pokfulam, Hong Kong), M. Qi(Nanjing University, Nanjing, P. R. China), S. Qian(Institute of High Energy Physics, Beijing, P. R. China), C. F. Qiao(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), X. S. Qin(Institute of High Energy Physics, Beijing, P. R. China), Y. Qin(Peking University, Beijing, P. R. China), Z. H. Qin(Institute of High Energy Physics, Beijing, P. R. China), J. F. Qiu(Institute of High Energy Physics, Beijing, P. R. China), K. H. Rashid(University of the Punjab, Lahore, Pakistan), G. Rong(Institute of High Energy Physics, Beijing, P. R. China), X. D. Ruan(GuangXi University, Nanning, P.R.China), A. Sarantsev(20, e), J. Schulze(Bochum Ruhr-University, Bochum, Germany), M. Shao(University of Science and Technology of China, Hefei, P. R. China), C. P. Shen(38, f), X. Y. Shen(Institute of High Energy Physics, Beijing, P. R. China), H. Y. Sheng(Institute of High Energy Physics, Beijing, P. R. China), M. R. Shepherd(Indiana University, Bloomington, Indiana, USA), X. Y. Song(Institute of High Energy Physics, Beijing, P. R. China), S. Spataro(University of Turin and INFN, Turin, Italy), B. Spruck(Universitaet Giessen, Giessen, Germany), D. H. Sun(Institute of High Energy Physics, Beijing, P. R. China), G. X. Sun(Institute of High Energy Physics, Beijing, P. R. China), J. F. Sun(Henan Normal University, Xinxiang, P. R. China), S. S. Sun(Institute of High Energy Physics, Beijing, P. R. China), X. D. Sun(Institute of High Energy Physics, Beijing, P. R. China), Y. J. Sun(University of Science and Technology of China, Hefei, P. R. China), Y. Z. Sun(Institute of High Energy Physics, Beijing, P. R. China), Z. J. Sun(Institute of High Energy Physics, Beijing, P. R. China), Z. T. Sun(University of Science and Technology of China, Hefei, P. R. China), C. J. Tang(Sichuan University, Chengdu, P. R. China), X. Tang(Institute of High Energy Physics, Beijing, P. R. China), E. H. Thorndike(University of Rochester, Rochester, New York, USA), H. L. Tian(Institute of High Energy Physics, Beijing, P. R. China), D. Toth(University of Minnesota, Minneapolis, MN, USA), M. U. Ulrich(Universitaet Giessen, Giessen, Germany), G. S. Varner(University of Hawaii, Honolulu, Hawaii, USA), B. Wang(GuangXi University, Nanning, P.R.China), B. Q. Wang(Peking University, Beijing, P. R. China), K. Wang(Institute of High Energy Physics, Beijing, P. R. China), L. L. Wang(China Center of Advanced Science and Technology, Beijing, P. R. China), L. S. Wang(Institute of High Energy Physics, Beijing, P. R. China), M. Wang(Shandong University, Jinan, P. R. China), P. Wang(Institute of High Energy Physics, Beijing, P. R. China), P. L. Wang(Institute of High Energy Physics, Beijing, P. R. China), Q. Wang(Peking University, Beijing, P. R. China), Q. J. Wang(Institute of High Energy Physics, Beijing, P. R. China), S. G. Wang(Peking University, Beijing, P. R. China), X. F. Wang(Henan Normal University, Xinxiang, P. R. China), X. L. Wang(University of Science and Technology of China, Hefei, P. R. China), Y. D. Wang(University of Science and Technology of China, Hefei, P. R. China), Y. F. Wang(Institute of High Energy Physics, Beijing, P. R. China), Y. Q. Wang(Shandong University, Jinan, P. R. China), Z. Wang(Institute of High Energy Physics, Beijing, P. R. China), Z. G. Wang(Institute of High Energy Physics, Beijing, P. R. China), Z. Y. Wang(Institute of High Energy Physics, Beijing, P. R. China), D. H. Wei(Guangxi Normal University, Guilin, P. R. China), P. Weidenkaff(Johannes Gutenberg University of Mainz, Mainz, Germany), Q. G. Wen(University of Science and Technology of China, Hefei, P. R. China), S. P. Wen(Institute of High Energy Physics, Beijing, P. R. China), M. W. Werner(Universitaet Giessen, Giessen, Germany), U. Wiedner(Bochum Ruhr-University, Bochum, Germany), L. H. Wu(Institute of High Energy Physics, Beijing, P. R. China), N. Wu(Institute of High Energy Physics, Beijing, P. R. China), S. X. Wu(University of Science and Technology of China, Hefei, P. R. China), W. Wu(Nankai University, Tianjin, P. R. China), Z. Wu(Institute of High Energy Physics, Beijing, P. R. China), L. G. Xia(Tsinghua University, Beijing, P. R. China), Z. J. Xiao(Nanjing Normal University, Nanjing, P. R. China), Y. G. Xie(Institute of High Energy Physics, Beijing, P. R. China), Q. L. Xiu(Institute of High Energy Physics, Beijing, P. R. China), G. F. Xu(Institute of High Energy Physics, Beijing, P. R. China), G. M. Xu(Peking University, Beijing, P. R. China), H. Xu(Institute of High Energy Physics, Beijing, P. R. China), Q. J. Xu(Hangzhou Normal University, Hangzhou, P. R. China), X. P. Xu(Soochow University, Suzhou, China), Y. Xu(Nankai University, Tianjin, P. R. China), Z. R. Xu(University of Science and Technology of China, Hefei, P. R. China), F. Xue(Huazhong Normal University, Wuhan, P. R. China), Z. Xue(Institute of High Energy Physics, Beijing, P. R. China), L. Yan(University of Science and Technology of China, Hefei, P. R. China), W. B. Yan(University of Science and Technology of China, Hefei, P. R. China), Y. H. Yan(Hunan University, Changsha, P. R. China), H. X. Yang(Institute of High Energy Physics, Beijing, P. R. China), T. Yang(GuangXi University, Nanning, P.R.China), Y. Yang(Huazhong Normal University, Wuhan, P. R. China), Y. X. Yang(Guangxi Normal University, Guilin, P. R. China), H. Ye(Institute of High Energy Physics, Beijing, P. R. China), M. Ye(Institute of High Energy Physics, Beijing, P. R. China), M. H. Ye(China Center of Advanced Science and Technology, Beijing, P. R. China), B. X. Yu(Institute of High Energy Physics, Beijing, P. R. China), C. X. Yu(Nankai University, Tianjin, P. R. China), J. S. Yu(Lanzhou University, Lanzhou, P. R. China), S. P. Yu(Shandong University, Jinan, P. R. China), C. Z. Yuan(Institute of High Energy Physics, Beijing, P. R. China), W. L. Yuan(Nanjing Normal University, Nanjing, P. R. China), Y. Yuan(Institute of High Energy Physics, Beijing, P. R. China), A. A. Zafar(University of the Punjab, Lahore, Pakistan), A. Z. Zallo(INFN Laboratori Nazionali di Frascati, Frascati, Italy), Y. Zeng(Hunan University, Changsha, P. R. China), B. X. Zhang(Institute of High Energy Physics, Beijing, P. R. China), B. Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), C. C. Zhang(Institute of High Energy Physics, Beijing, P. R. China), D. H. Zhang(Institute of High Energy Physics, Beijing, P. R. China), H. H. Zhang(Sun Yat-Sen University, Guangzhou, P. R. China), H. Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. Zhang(Nanjing Normal University, Nanjing, P. R. China), J. G. Zhang(Henan Normal University, Xinxiang, P. R. China), J. Q. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. W. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. Z. Zhang(Institute of High Energy Physics, Beijing, P. R. China), L. Zhang(Nanjing University, Nanjing, P. R. China), S. H. Zhang(Institute of High Energy Physics, Beijing, P. R. China), T. R. Zhang(Nanjing Normal University, Nanjing, P. R. China), X. J. Zhang(Institute of High Energy Physics, Beijing, P. R. China), X. Y. Zhang(Shandong University, Jinan, P. R. China), Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), Y. H. Zhang(Institute of High Energy Physics, Beijing, P. R. China), Y. S. Zhang(GuangXi University, Nanning, P.R.China), Z. P. Zhang(University of Science and Technology of China, Hefei, P. R. China), Z. Y. Zhang(Wuhan University, Wuhan, P. R. China), G. Zhao(Institute of High Energy Physics, Beijing, P. R. China), H. S. Zhao(Institute of High Energy Physics, Beijing, P. R. China), J. W. Zhao(Institute of High Energy Physics, Beijing, P. R. China), K. X. Zhao(Nanjing Normal University, Nanjing, P. R. China), Lei Zhao(University of Science and Technology of China, Hefei, P. R. China), Ling Zhao(Institute of High Energy Physics, Beijing, P. R. China), M. G. Zhao(Nankai University, Tianjin, P. R. China), Q. Zhao(Institute of High Energy Physics, Beijing, P. R. China), S. J. Zhao(Zhengzhou University, Zhengzhou, P. R. China), T. C. Zhao(Institute of High Energy Physics, Beijing, P. R. China), X. H. Zhao(Nanjing University, Nanjing, P. R. China), Y. B. Zhao(Institute of High Energy Physics, Beijing, P. R. China), Z. G. Zhao(University of Science and Technology of China, Hefei, P. R. China), A. Zhemchugov(20, a), B. Zheng(University of South China, Hengyang, P. R. China), J. P. Zheng(Institute of High Energy Physics, Beijing, P. R. China), Y. H. Zheng(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), Z. P. Zheng(Institute of High Energy Physics, Beijing, P. R. China), B. Zhong(Institute of High Energy Physics, Beijing, P. R. China), J. Zhong(Bochum Ruhr-University, Bochum, Germany), L. Zhou(Institute of High Energy Physics, Beijing, P. R. China), X. K. Zhou(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), X. R. Zhou(University of Science and Technology of China, Hefei, P. R. China), C. Zhu(Institute of High Energy Physics, Beijing, P. R. China), K. Zhu(Institute of High Energy Physics, Beijing, P. R. China), K. J. Zhu(Institute of High Energy Physics, Beijing, P. R. China), S. H. Zhu(Institute of High Energy Physics, Beijing, P. R. China), X. L. Zhu(Tsinghua University, Beijing, P. R. China), X. W. Zhu(Institute of High Energy Physics, Beijing, P. R. China), Y. M. Zhu(Nankai University, Tianjin, P. R. China), Y. S. Zhu(Institute of High Energy Physics, Beijing, P. R. China), Z. A. Zhu(Institute of High Energy Physics, Beijing, P. R. China), J. Zhuang(Institute of High Energy Physics, Beijing, P. R. China), B. S. Zou(Institute of High Energy Physics, Beijing, P. R. China), J. H. Zou(Institute of High Energy Physics, Beijing, P. R. China), and J. X. Zuo(Institute of High Energy Physics, Beijing, P. R. China)

Subjects
hep-ex, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

The decays $J/\psi\to p\bar{p}$ and $J/\psi\to n\bar{n}$ have been investigated with a sample of 225.2 million $J/\psi$ events collected with the BESIII detector at the BEPCII $e^+e^-$ collider. The branching fractions are determined to be $\mathcal{B}(J/\psi\to p\bar{p})=(2.112\pm0.004\pm0.031)\times10^{-3}$ and $\mathcal{B}(J/\psi\to n\bar{n})=(2.07\pm0.01\pm0.17)\times10^{-3}$. Distributions of the angle $\theta$ between the proton or anti-neutron and the beam direction are well described by the form $1+\alpha\cos^2\theta$, and we find $\alpha=0.595\pm0.012\pm0.015$ for $J/\psi\to p\bar{p}$ and $\alpha=0.50\pm0.04\pm0.21$ for $J/\psi\to n\bar{n}$. Our branching-fraction results suggest a large phase angle between the strong and electromagnetic amplitudes describing the $J/\psi\to N\bar{N}$ decay.

Published
2015

19. Observation of Electromagnetic Dalitz decays J/ψ\to P e^+e^

Author

M. AblikimInstitute of High Energy Physics, M. N. Achasov(8, a), X. C. Ai(Institute of High Energy Physics), O. Albayrak(Carnegie Mellon University), M. Albrecht(, Bochum Ruhr-University, Germany), D. J. Ambrose(University of Rochester), F. F. An(Institute of High Energy Physics), Q. An(University of Science and Technology of China), J. Z. Bai(Institute of High Energy Physics), R. Baldini Ferroli(19A), Y. Ban(Peking University), J. V. Bennett(Indiana University), M. Bertani(19A), J. M. Bian(University of Minnesota), E. Boger(21, b), O. Bondarenko(KVI, University of Groningen), I. Boyko(Joint Institute for Nuclear Research), S. Braun(Universitaet Giessen), R. A. Briere(Carnegie Mellon University), H. Cai(Wuhan University), X. Cai(Institute of High Energy Physics), O. Cakir(36A), A. Calcaterra(19A), G. F. Cao(Institute of High Energy Physics), S. A. Cetin(36B), J. F. Chang(Institute of High Energy Physics), G. Chelkov(21, b), G. Chen(Institute of High Energy Physics), H. S. Chen(Institute of High Energy Physics), J. C. Chen(Institute of High Energy Physics), M. L. Chen(Institute of High Energy Physics), S. J. Chen(Nanjing University), X. Chen(Institute of High Energy Physics), X. R. Chen(Lanzhou University), Y. B. Chen(Institute of High Energy Physics), H. P. Cheng(Huangshan College), X. K. Chu(Peking University), Y. P. Chu(Institute of High Energy Physics), D. Cronin-Hennessy(University of Minnesota), H. L. Dai(Institute of High Energy Physics), J. P. Dai(Institute of High Energy Physics), D. Dedovich(Joint Institute for Nuclear Research), Z. Y. Deng(Institute of High Energy Physics), A. Denig(Johannes Gutenberg University of Mainz), I. Denysenko(Joint Institute for Nuclear Research), M. Destefanis(45A,45C), W. M. Ding(Shandong University), Y. Ding(Liaoning University), C. Dong(Nankai university), J. Dong(Institute of High Energy Physics), L. Y. Dong(Institute of High Energy Physics), M. Y. Dong(Institute of High Energy Physics), S. X. Du(Zhengzhou University), J. Z. Fan(Tsinghua University), J. Fang(Institute of High Energy Physics), S. S. Fang(Institute of High Energy Physics), Y. Fang(Institute of High Energy Physics), L. Fava(45B,45C), C. Q. Feng(University of Science and Technology of China), C. D. Fu(Institute of High Energy Physics), J. L. Fu(Nanjing University), O. Fuks(21, b), Q. Gao(Institute of High Energy Physics), Y. Gao(Tsinghua University), C. Geng(University of Science and Technology of China), K. Goetzen(GSI Helmholtzcentre for Heavy Ion Research GmbH), W. X. Gong(Institute of High Energy Physics), W. Gradl(Johannes Gutenberg University of Mainz), M. Greco(45A,45C), M. H. Gu(Institute of High Energy Physics), Y. T. Gu(GuangXi University), Y. H. Guan(Institute of High Energy Physics), A. Q. Guo(Nankai university), L. B. Guo(Nanjing Normal University), T. Guo(Nanjing Normal University), Y. P. Guo(Johannes Gutenberg University of Mainz), Y. L. Han(Institute of High Energy Physics), F. A. Harris(University of Hawaii), K. L. He(Institute of High Energy Physics), M. He(Institute of High Energy Physics), Z. Y. He(Nankai university), T. Held(, Bochum Ruhr-University, Germany), Y. K. Heng(Institute of High Energy Physics), Z. L. Hou(Institute of High Energy Physics), C. Hu(Nanjing Normal University), H. M. Hu(Institute of High Energy Physics), J. F. Hu(Universitaet Giessen), T. Hu(Institute of High Energy Physics), G. M. Huang(Central China Normal University), G. S. Huang(University of Science and Technology of China), H. P. Huang(Wuhan University), J. S. Huang(Henan Normal University), L. Huang(Institute of High Energy Physics), X. T. Huang(Shandong University), Y. Huang(Nanjing University), T. Hussain(University of the Punjab), C. S. Ji(University of Science and Technology of China), Q. Ji(Institute of High Energy Physics), Q. P. Ji(Nankai university), X. B. Ji(Institute of High Energy Physics), X. L. Ji(Institute of High Energy Physics), L. L. Jiang(Institute of High Energy Physics), L. W. Jiang(Wuhan University), X. S. Jiang(Institute of High Energy Physics), J. B. Jiao(Shandong University), Z. Jiao(Huangshan College), D. P. Jin(Institute of High Energy Physics), S. Jin(Institute of High Energy Physics), T. Johansson(Uppsala University), N. Kalantar-Nayestanaki(KVI, University of Groningen), X. L. Kang(Institute of High Energy Physics), X. S. Kang(Nankai university), M. Kavatsyuk(KVI, University of Groningen), B. Kloss(Johannes Gutenberg University of Mainz), B. Kopf(, Bochum Ruhr-University, Germany), M. Kornicer(University of Hawaii), W. Kuehn(Universitaet Giessen), A. Kupsc(Uppsala University), W. Lai(Institute of High Energy Physics), J. S. Lange(Universitaet Giessen), M. Lara(Indiana University), P. Larin(Helmholtz Institute Mainz), M. Leyhe(, Bochum Ruhr-University, Germany), C. H. Li(Institute of High Energy Physics), Cheng Li(University of Science and Technology of China), Cui Li(University of Science and Technology of China), D. Li(Hunan University), D. M. Li(Zhengzhou University), F. Li(Institute of High Energy Physics), G. Li(Institute of High Energy Physics), H. B. Li(Institute of High Energy Physics), J. C. Li(Institute of High Energy Physics), K. Li(Shandong University), Lei Li(Institute of High Energy Physics), P. R. Li(University of Chinese Academy of Sciences), Q. J. Li(Institute of High Energy Physics), T. Li(Shandong University), W. D. Li(Institute of High Energy Physics), W. G. Li(Institute of High Energy Physics), X. L. Li(Shandong University), X. N. Li(Institute of High Energy Physics), X. Q. Li(Nankai university), Z. B. Li(Sun Yat-Sen University), H. Liang(University of Science and Technology of China), Y. F. Liang(Sichuan University), Y. T. Liang(Universitaet Giessen), D. X. Lin(Helmholtz Institute Mainz), B. J. Liu(Institute of High Energy Physics), C. L. Liu(Carnegie Mellon University), C. X. Liu(Institute of High Energy Physics), F. H. Liu(Shanxi University), Fang Liu(Institute of High Energy Physics), Feng Liu(Central China Normal University), H. B. Liu(GuangXi University), H. H. Liu(Henan University of Science and Technology), H. M. Liu(Institute of High Energy Physics), J. Liu(Institute of High Energy Physics), J. P. Liu(Wuhan University), K. Liu(Tsinghua University), K. Y. Liu(Liaoning University), P. L. Liu(Shandong University), Q. Liu(University of Chinese Academy of Sciences), S. B. Liu(University of Science and Technology of China), X. Liu(Institute of High Energy Physics), Y. B. Liu(Nankai university), Z. A. Liu(Institute of High Energy Physics), Zhiqiang Liu(Institute of High Energy Physics), Zhiqing Liu(Johannes Gutenberg University of Mainz), H. Loehner(KVI, University of Groningen), X. C. Lou(1, c), G. R. Lu(Henan Normal University), H. J. Lu(Huangshan College), H. L. Lu(Institute of High Energy Physics), J. G. Lu(Institute of High Energy Physics), X. R. Lu(University of Chinese Academy of Sciences), Y. Lu(Institute of High Energy Physics), Y. P. Lu(Institute of High Energy Physics), C. L. Luo(Nanjing Normal University), M. X. Luo(Zhejiang University), T. Luo(University of Hawaii), X. L. Luo(Institute of High Energy Physics), M. Lv(Institute of High Energy Physics), F. C. Ma(Liaoning University), H. L. Ma(Institute of High Energy Physics), Q. M. Ma(Institute of High Energy Physics), S. Ma(Institute of High Energy Physics), T. Ma(Institute of High Energy Physics), X. Y. Ma(Institute of High Energy Physics), F. E. Maas(Helmholtz Institute Mainz), M. Maggiora(45A,45C), Q. A. Malik(University of the Punjab), Y. J. Mao(Peking University), Z. P. Mao(Institute of High Energy Physics), J. G. Messchendorp(KVI, University of Groningen), J. Min(Institute of High Energy Physics), T. J. Min(Institute of High Energy Physics), R. E. Mitchell(Indiana University), X. H. Mo(Institute of High Energy Physics), Y. J. Mo(Central China Normal University), H. Moeini(KVI, University of Groningen), C. Morales Morales(Helmholtz Institute Mainz), K. Moriya(Indiana University), N. Yu. Muchnoi(8, a), H. Muramatsu(University of Minnesota), Y. Nefedov(Joint Institute for Nuclear Research), I. B. Nikolaev(8, a), Z. Ning(Institute of High Energy Physics), S. Nisar(COMSATS Institute of Information Technology), X. Y. Niu(Institute of High Energy Physics), S. L. Olsen(Seoul National University), Q. Ouyang(Institute of High Energy Physics), S. Pacetti(19B), M. Pelizaeus(, Bochum Ruhr-University, Germany), H. P. Peng(University of Science and Technology of China), K. Peters(GSI Helmholtzcentre for Heavy Ion Research GmbH), J. L. Ping(Nanjing Normal University), R. G. Ping(Institute of High Energy Physics), R. Poling(University of Minnesota), N. Q.(Wuhan University), M. Qi(Nanjing University), S. Qian(Institute of High Energy Physics), C. F. Qiao(University of Chinese Academy of Sciences), L. Q. Qin(Shandong University), X. S. Qin(Institute of High Energy Physics), Y. Qin(Peking University), Z. H. Qin(Institute of High Energy Physics), J. F. Qiu(Institute of High Energy Physics), K. H. Rashid(University of the Punjab), C. F. Redmer(Johannes Gutenberg University of Mainz), M. Ripka(Johannes Gutenberg University of Mainz), G. Rong(Institute of High Energy Physics), X. D. Ruan(GuangXi University), A. Sarantsev(21, d), K. Schoenning(Uppsala University), S. Schumann(Johannes Gutenberg University of Mainz), W. Shan(Peking University), M. Shao(University of Science and Technology of China), C. P. Shen(Beihang University), X. Y. Shen(Institute of High Energy Physics), H. Y. Sheng(Institute of High Energy Physics), M. R. Shepherd(Indiana University), W. M. Song(Institute of High Energy Physics), X. Y. Song(Institute of High Energy Physics), S. Spataro(45A,45C), B. Spruck(Universitaet Giessen), G. X. Sun(Institute of High Energy Physics), J. F. Sun(Henan Normal University), S. S. Sun(Institute of High Energy Physics), Y. J. Sun(University of Science and Technology of China), Y. Z. Sun(Institute of High Energy Physics), Z. J. Sun(Institute of High Energy Physics), Z. T. Sun(University of Science and Technology of China), C. J. Tang(Sichuan University), X. Tang(Institute of High Energy Physics), I. Tapan(36C), E. H. Thorndike(University of Rochester), D. Toth(University of Minnesota), M. Ullrich(Universitaet Giessen), I. Uman(36B), G. S. Varner(University of Hawaii), B. Wang(Nankai university), D. Wang(Peking University), D. Y. Wang(Peking University), K. Wang(Institute of High Energy Physics), L. L. Wang(Institute of High Energy Physics), L. S. Wang(Institute of High Energy Physics), M. Wang(Shandong University), P. Wang(Institute of High Energy Physics), P. L. Wang(Institute of High Energy Physics), Q. J. Wang(Institute of High Energy Physics), S. G. Wang(Peking University), W. Wang(Institute of High Energy Physics), X. F. Wang(Tsinghua University), Y. D. Wang(19A), Y. F. Wang(Institute of High Energy Physics), Y. Q. Wang(Johannes Gutenberg University of Mainz), Z. Wang(Institute of High Energy Physics), Z. G. Wang(Institute of High Energy Physics), Z. H. Wang(University of Science and Technology of China), Z. Y. Wang(Institute of High Energy Physics), D. H. Wei(Guangxi Normal University), J. B. Wei(Peking University), P. Weidenkaff(Johannes Gutenberg University of Mainz), S. P. Wen(Institute of High Energy Physics), M. Werner(Universitaet Giessen), U. Wiedner(, Bochum Ruhr-University, Germany), M. Wolke(Uppsala University), L. H. Wu(Institute of High Energy Physics), N. Wu(Institute of High Energy Physics), Z. Wu(Institute of High Energy Physics), L. G. Xia(Tsinghua University), Y. Xia(Hunan University), D. Xiao(Institute of High Energy Physics), Z. J. Xiao(Nanjing Normal University), Y. G. Xie(Institute of High Energy Physics), Q. L. Xiu(Institute of High Energy Physics), G. F. Xu(Institute of High Energy Physics), L. Xu(Institute of High Energy Physics), Q. J. Xu(Hangzhou Normal University), Q. N. Xu(University of Chinese Academy of Sciences), X. P. Xu(Soochow University), Z. Xue(Institute of High Energy Physics), L. Yan(University of Science and Technology of China), W. B. Yan(University of Science and Technology of China), W. C. Yan(University of Science and Technology of China), Y. H. Yan(Hunan University), H. X. Yang(Institute of High Energy Physics), L. Yang(Wuhan University), Y. Yang(Central China Normal University), Y. X. Yang(Guangxi Normal University), H. Ye(Institute of High Energy Physics), M. Ye(Institute of High Energy Physics), M. H. Ye(China Center of Advanced Science and Technology), B. X. Yu(Institute of High Energy Physics), C. X. Yu(Nankai university), H. W. Yu(Peking University), J. S. Yu(Lanzhou University), S. P. Yu(Shandong University), C. Z. Yuan(Institute of High Energy Physics), W. L. Yuan(Nanjing University), Y. Yuan(Institute of High Energy Physics), A. Yuncu(36B), A. A. Zafar(University of the Punjab), A. Zallo(19A), S. L. Zang(Nanjing University), Y. Zeng(Hunan University), B. X. Zhang(Institute of High Energy Physics), B. Y. Zhang(Institute of High Energy Physics), C. Zhang(Nanjing University), C. B. Zhang(Hunan University), C. C. Zhang(Institute of High Energy Physics), D. H. Zhang(Institute of High Energy Physics), H. H. Zhang(Sun Yat-Sen University), H. Y. Zhang(Institute of High Energy Physics), J. J. Zhang(Institute of High Energy Physics), J. Q. Zhang(Institute of High Energy Physics), J. W. Zhang(Institute of High Energy Physics), J. Y. Zhang(Institute of High Energy Physics), J. Z. Zhang(Institute of High Energy Physics), S. H. Zhang(Institute of High Energy Physics), X. J. Zhang(Institute of High Energy Physics), X. Y. Zhang(Shandong University), Y. Zhang(Institute of High Energy Physics), Y. H. Zhang(Institute of High Energy Physics), Z. H. Zhang(Central China Normal University), Z. P. Zhang(University of Science and Technology of China), Z. Y. Zhang(Wuhan University), G. Zhao(Institute of High Energy Physics), J. W. Zhao(Institute of High Energy Physics), Lei Zhao(University of Science and Technology of China), Ling Zhao(Institute of High Energy Physics), M. G. Zhao(Nankai university), Q. Zhao(Institute of High Energy Physics), Q. W. Zhao(Institute of High Energy Physics), S. J. Zhao(Zhengzhou University), T. C. Zhao(Institute of High Energy Physics), X. H. Zhao(Nanjing University), Y. B. Zhao(Institute of High Energy Physics), Z. G. Zhao(University of Science and Technology of China), A. Zhemchugov(21, b), B. Zheng(University of South China), J. P. Zheng(Institute of High Energy Physics), Y. H. Zheng(University of Chinese Academy of Sciences), B. Zhong(Nanjing Normal University), L. Zhou(Institute of High Energy Physics), Li Zhou(Nankai university), X. Zhou(Wuhan University), X. K. Zhou(University of Chinese Academy of Sciences), X. R. Zhou(University of Science and Technology of China), X. Y. Zhou(Institute of High Energy Physics), K. Zhu(Institute of High Energy Physics), K. J. Zhu(Institute of High Energy Physics), S. H. Zhu(Institute of High Energy Physics), X. L. Zhu(Tsinghua University), Y. C. Zhu(University of Science and Technology of China), Y. S. Zhu(Institute of High Energy Physics), Z. A. Zhu(Institute of High Energy Physics), J. Zhuang(Institute of High Energy Physics), B. S. Zou(Institute of High Energy Physics), and J. H. Zou(Institute of High Energy Physics)

Subjects
hep-ex, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

Based on a sample of (225.3\pm2.8)\times 10^{6} J/\psi events collected with the BESIII detector, the electromagnetic Dalitz decays of J/\psi \to P e^+e^-(P=\eta'/\eta/\pi^0) are studied. By reconstructing the pseudoscalar mesons in various decay modes, the decays J/\psi \to \eta' e^+e^-, J/\psi \to \eta e^+e^- and J/\psi \to \pi^0 e^+e^- are observed for the first time. The branching fractions are determined to be \mathcal{B}(J/\psi\to \eta' e^+e^-) = (5.81\pm0.16\pm0.31)\times10^{-5}, \mathcal{B}(J/\psi\to \eta e^+e^-) = (1.16\pm0.07\pm0.06)\times10^{-5}, and \mathcal{B}(J/\psi\to \pi^0 e^+e^-)=(7.56\pm1.32\pm0.50)\times10^{-7}, where the first errors are statistical and the second ones systematic.

Published
2015

20. Two-photon widths of the $χ_{c0, 2}$ states and helicity analysis for $χ_{c2}\arγγ$}

Author

BESIII Collaboration, M. Ablikim(Institute of High Energy Physics, Beijing, P. R. China), M. N. Achasov(G.I. Budker Institute of Nuclear Physics SB RAS), D. J. Ambrose(University of Rochester, Rochester, New York, USA), F. F. An(Institute of High Energy Physics, Beijing, P. R. China), Q. An(University of Science and Technology of China, Hefei, P. R. China), Z. H. An(Institute of High Energy Physics, Beijing, P. R. China), J. Z. Bai(Institute of High Energy Physics, Beijing, P. R. China), R. B. Ferroli(INFN Laboratori Nazionali di Frascati, Frascati, Italy), Y. Ban(Peking University, Beijing, P. R. China), J. Becker(Bochum Ruhr-University, Bochum, Germany), N. Berger(Institute of High Energy Physics, Beijing, P. R. China), M. B. Bertani(INFN Laboratori Nazionali di Frascati, Frascati, Italy), J. M. Bian(University of Minnesota, Minneapolis, MN, USA), E. Boger(20, a), O. Bondarenko(KVI/University of Groningen, Groningen, The Netherlands), I. Boyko(Joint Institute for Nuclear Research, Dubna, Russia), R. A. Briere(Carnegie Mellon University, Pittsburgh, PA, USA), V. Bytev(Joint Institute for Nuclear Research, Dubna, Russia), X. Cai(Institute of High Energy Physics, Beijing, P. R. China), A. C. Calcaterra(INFN Laboratori Nazionali di Frascati, Frascati, Italy), G. F. Cao(Institute of High Energy Physics, Beijing, P. R. China), J. F. Chang(Institute of High Energy Physics, Beijing, P. R. China), G. Chelkov(20, a), G. Chen(Institute of High Energy Physics, Beijing, P. R. China), H. S. Chen(Institute of High Energy Physics, Beijing, P. R. China), J. C. Chen(Institute of High Energy Physics, Beijing, P. R. China), M. L. Chen(Institute of High Energy Physics, Beijing, P. R. China), S. J. Chen(Nanjing University, Nanjing, P. R. China), Y. Chen(Institute of High Energy Physics, Beijing, P. R. China), Y. B. Chen(Institute of High Energy Physics, Beijing, P. R. China), H. P. Cheng(Huangshan College, Huangshan, P. R. China), Y. P. Chu(Institute of High Energy Physics, Beijing, P. R. China), D. Cronin-Hennessy(University of Minnesota, Minneapolis, MN, USA), H. L. Dai(Institute of High Energy Physics, Beijing, P. R. China), J. P. Dai(Institute of High Energy Physics, Beijing, P. R. China), D. Dedovich(Joint Institute for Nuclear Research, Dubna, Russia), Z. Y. Deng(Institute of High Energy Physics, Beijing, P. R. China), A. Denig(Johannes Gutenberg University of Mainz, Mainz, Germany), I. Denysenko(20, b), M. Destefanis(University of Turin and INFN, Turin, Italy), W. M. Ding(Shandong University, Jinan, P. R. China), Y. Ding(Liaoning University, Shenyang, P. R. China), L. Y. Dong(Institute of High Energy Physics, Beijing, P. R. China), M. Y. Dong(Institute of High Energy Physics, Beijing, P. R. China), S. X. Du(Zhengzhou University, Zhengzhou, P. R. China), J. Fang(Institute of High Energy Physics, Beijing, P. R. China), S. S. Fang(Institute of High Energy Physics, Beijing, P. R. China), L. Fava(44, c), F. Feldbauer(Bochum Ruhr-University, Bochum, Germany), C. Q. Feng(University of Science and Technology of China, Hefei, P. R. China), C. D. Fu(Institute of High Energy Physics, Beijing, P. R. China), J. L. Fu(Nanjing University, Nanjing, P. R. China), Y. Gao(Tsinghua University, Beijing, P. R. China), C. Geng(University of Science and Technology of China, Hefei, P. R. China), K. Goetzen(GSI Helmholtzcentre for Heavy Ion Research GmbH, Darmstadt, Germany), W. X. Gong(Institute of High Energy Physics, Beijing, P. R. China), W. Gradl(Johannes Gutenberg University of Mainz, Mainz, Germany), M. Greco(University of Turin and INFN, Turin, Italy), M. H. Gu(Institute of High Energy Physics, Beijing, P. R. China), Y. T. Gu(GuangXi University, Nanning, P.R.China), Y. H. Guan(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), A. Q. Guo(Nankai University, Tianjin, P. R. China), L. B. Guo(Nanjing Normal University, Nanjing, P. R. China), Y. P. Guo(Nankai University, Tianjin, P. R. China), Y. L. Han(Institute of High Energy Physics, Beijing, P. R. China), X. Q. Hao(Institute of High Energy Physics, Beijing, P. R. China), F. A. Harris(University of Hawaii, Honolulu, Hawaii, USA), K. L. He(Institute of High Energy Physics, Beijing, P. R. China), M. He(Institute of High Energy Physics, Beijing, P. R. China), Z. Y. He(Nankai University, Tianjin, P. R. China), T. Held(Bochum Ruhr-University, Bochum, Germany), Y. K. Heng(Institute of High Energy Physics, Beijing, P. R. China), Z. L. Hou(Institute of High Energy Physics, Beijing, P. R. China), H. M. Hu(Institute of High Energy Physics, Beijing, P. R. China), J. F. Hu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), T. Hu(Institute of High Energy Physics, Beijing, P. R. China), B. Huang(Institute of High Energy Physics, Beijing, P. R. China), G. M. Huang(Huazhong Normal University, Wuhan, P. R. China), J. S. Huang(Henan Normal University, Xinxiang, P. R. China), X. T. Huang(Shandong University, Jinan, P. R. China), Y. P. Huang(Institute of High Energy Physics, Beijing, P. R. China), T. Hussain(University of the Punjab, Lahore, Pakistan), C. S. Ji(University of Science and Technology of China, Hefei, P. R. China), Q. Ji(Institute of High Energy Physics, Beijing, P. R. China), X. B. Ji(Institute of High Energy Physics, Beijing, P. R. China), X. L. Ji(Institute of High Energy Physics, Beijing, P. R. China), L. K. Jia(Institute of High Energy Physics, Beijing, P. R. China), L. L. Jiang(Institute of High Energy Physics, Beijing, P. R. China), X. S. Jiang(Institute of High Energy Physics, Beijing, P. R. China), J. B. Jiao(Shandong University, Jinan, P. R. China), Z. Jiao(Huangshan College, Huangshan, P. R. China), D. P. Jin(Institute of High Energy Physics, Beijing, P. R. China), S. Jin(Institute of High Energy Physics, Beijing, P. R. China), F. F. Jing(Tsinghua University, Beijing, P. R. China), N. Kalantar-Nayestanaki(KVI/University of Groningen, Groningen, The Netherlands), M. Kavatsyuk(KVI/University of Groningen, Groningen, The Netherlands), W. Kuehn(Universitaet Giessen, Giessen, Germany), W. Lai(Institute of High Energy Physics, Beijing, P. R. China), J. S. Lange(Universitaet Giessen, Giessen, Germany), J. K. C. Leung(The University of Hong Kong, Pokfulam, Hong Kong), C. H. Li(Institute of High Energy Physics, Beijing, P. R. China), Cheng Li(University of Science and Technology of China, Hefei, P. R. China), Cui Li(University of Science and Technology of China, Hefei, P. R. China), D. M. Li(Zhengzhou University, Zhengzhou, P. R. China), F. Li(Institute of High Energy Physics, Beijing, P. R. China), G. Li(Institute of High Energy Physics, Beijing, P. R. China), H. B. Li(Institute of High Energy Physics, Beijing, P. R. China), J. C. Li(Institute of High Energy Physics, Beijing, P. R. China), K. Li(Hangzhou Normal University, Hangzhou, P. R. China), Lei Li(Institute of High Energy Physics, Beijing, P. R. China), N. B. Li(Nanjing Normal University, Nanjing, P. R. China), Q. J. Li(Institute of High Energy Physics, Beijing, P. R. China), S. L. Li(Institute of High Energy Physics, Beijing, P. R. China), W. D. Li(Institute of High Energy Physics, Beijing, P. R. China), W. G. Li(Institute of High Energy Physics, Beijing, P. R. China), X. L. Li(Shandong University, Jinan, P. R. China), X. N. Li(Institute of High Energy Physics, Beijing, P. R. China), X. Q. Li(Nankai University, Tianjin, P. R. China), X. R. Li(Seoul National University, Seoul, Korea), Z. B. Li(Sun Yat-Sen University, Guangzhou, P. R. China), H. Liang(University of Science and Technology of China, Hefei, P. R. China), Y. F. Liang(Sichuan University, Chengdu, P. R. China), Y. T. Liang(Universitaet Giessen, Giessen, Germany), G. R. Liao(Tsinghua University, Beijing, P. R. China), X. T. Liao(Institute of High Energy Physics, Beijing, P. R. China), B. J. Liu(Institute of High Energy Physics, Beijing, P. R. China), C. L. Liu(Carnegie Mellon University, Pittsburgh, PA, USA), C. X. Liu(Institute of High Energy Physics, Beijing, P. R. China), C. Y. Liu(Institute of High Energy Physics, Beijing, P. R. China), F. H. Liu(Shanxi University, Taiyuan, P. R. China), Fang Liu(Institute of High Energy Physics, Beijing, P. R. China), Feng Liu(Huazhong Normal University, Wuhan, P. R. China), H. Liu(Shanxi University, Taiyuan, P. R. China), H. B. Liu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), H. H. Liu(Henan University of Science and Technology, Luoyang, P. R. China), H. M. Liu(Institute of High Energy Physics, Beijing, P. R. China), H. W. Liu(Institute of High Energy Physics, Beijing, P. R. China), J. P. Liu(Wuhan University, Wuhan, P. R. China), Kun Liu(Peking University, Beijing, P. R. China), Kai Liu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), K. Y. Liu(Liaoning University, Shenyang, P. R. China), P. L. Liu(Shandong University, Jinan, P. R. China), S. B. Liu(University of Science and Technology of China, Hefei, P. R. China), X. Liu(Institute of High Energy Physics, Beijing, P. R. China), X. H. Liu(Institute of High Energy Physics, Beijing, P. R. China), Y. B. Liu(Nankai University, Tianjin, P. R. China), Y. Liu(Institute of High Energy Physics, Beijing, P. R. China), Z. A. Liu(Institute of High Energy Physics, Beijing, P. R. China), Zhiqiang Liu(Institute of High Energy Physics, Beijing, P. R. China), Zhiqing Liu(Institute of High Energy Physics, Beijing, P. R. China), H. Loehner(KVI/University of Groningen, Groningen, The Netherlands), G. R. Lu(Henan Normal University, Xinxiang, P. R. China), H. J. Lu(Huangshan College, Huangshan, P. R. China), J. G. Lu(Institute of High Energy Physics, Beijing, P. R. China), Q. W. Lu(Shanxi University, Taiyuan, P. R. China), X. R. Lu(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), Y. P. Lu(Institute of High Energy Physics, Beijing, P. R. China), C. L. Luo(Nanjing Normal University, Nanjing, P. R. China), M. X. Luo(Zhejiang University, Hangzhou, P. R. China), T. Luo(University of Hawaii, Honolulu, Hawaii, USA), X. L. Luo(Institute of High Energy Physics, Beijing, P. R. China), M. Lv(Institute of High Energy Physics, Beijing, P. R. China), C. L. Ma(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), F. C. Ma(Liaoning University, Shenyang, P. R. China), H. L. Ma(Institute of High Energy Physics, Beijing, P. R. China), Q. M. Ma(Institute of High Energy Physics, Beijing, P. R. China), S. Ma(Institute of High Energy Physics, Beijing, P. R. China), T. Ma(Institute of High Energy Physics, Beijing, P. R. China), X. Y. Ma(Institute of High Energy Physics, Beijing, P. R. China), Y. Ma(Institute of High Energy Physics, Beijing, P. R. China), F. E. Maas(Helmholtz Institute Mainz, Mainz, Germany), M. Maggiora(University of Turin and INFN, Turin, Italy), Q. A. Malik(University of the Punjab, Lahore, Pakistan), H. Mao(Institute of High Energy Physics, Beijing, P. R. China), Y. J. Mao(Peking University, Beijing, P. R. China), Z. P. Mao(Institute of High Energy Physics, Beijing, P. R. China), J. G. Messchendorp(KVI/University of Groningen, Groningen, The Netherlands), J. Min(Institute of High Energy Physics, Beijing, P. R. China), T. J. Min(Institute of High Energy Physics, Beijing, P. R. China), R. E. Mitchell(Indiana University, Bloomington, Indiana, USA), X. H. Mo(Institute of High Energy Physics, Beijing, P. R. China), C. Morales Morales(Helmholtz Institute Mainz, Mainz, Germany), C. Motzko(Bochum Ruhr-University, Bochum, Germany), N. Yu. Muchnoi(G.I. Budker Institute of Nuclear Physics SB RAS), Y. Nefedov(Joint Institute for Nuclear Research, Dubna, Russia), C. Nicholson(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), I. B. Nikolaev(G.I. Budker Institute of Nuclear Physics SB RAS), Z. Ning(Institute of High Energy Physics, Beijing, P. R. China), S. L. Olsen(Seoul National University, Seoul, Korea), Q. Ouyang(Institute of High Energy Physics, Beijing, P. R. China), S. P. Pacetti(18, d), J. W. Park(Seoul National University, Seoul, Korea), M. Pelizaeus(University of Hawaii, Honolulu, Hawaii, USA), K. Peters(GSI Helmholtzcentre for Heavy Ion Research GmbH, Darmstadt, Germany), J. L. Ping(Nanjing Normal University, Nanjing, P. R. China), R. G. Ping(Institute of High Energy Physics, Beijing, P. R. China), R. Poling(University of Minnesota, Minneapolis, MN, USA), E. Prencipe(Johannes Gutenberg University of Mainz, Mainz, Germany), C. S. J. Pun(The University of Hong Kong, Pokfulam, Hong Kong), M. Qi(Nanjing University, Nanjing, P. R. China), S. Qian(Institute of High Energy Physics, Beijing, P. R. China), C. F. Qiao(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), X. S. Qin(Institute of High Energy Physics, Beijing, P. R. China), Y. Qin(Peking University, Beijing, P. R. China), Z. H. Qin(Institute of High Energy Physics, Beijing, P. R. China), J. F. Qiu(Institute of High Energy Physics, Beijing, P. R. China), K. H. Rashid(University of the Punjab, Lahore, Pakistan), G. Rong(Institute of High Energy Physics, Beijing, P. R. China), X. D. Ruan(GuangXi University, Nanning, P.R.China), A. Sarantsev(20, e), J. Schulze(Bochum Ruhr-University, Bochum, Germany), M. Shao(University of Science and Technology of China, Hefei, P. R. China), C. P. Shen(38, f), X. Y. Shen(Institute of High Energy Physics, Beijing, P. R. China), H. Y. Sheng(Institute of High Energy Physics, Beijing, P. R. China), M. R. Shepherd(Indiana University, Bloomington, Indiana, USA), X. Y. Song(Institute of High Energy Physics, Beijing, P. R. China), S. Spataro(University of Turin and INFN, Turin, Italy), B. Spruck(Universitaet Giessen, Giessen, Germany), D. H. Sun(Institute of High Energy Physics, Beijing, P. R. China), G. X. Sun(Institute of High Energy Physics, Beijing, P. R. China), J. F. Sun(Henan Normal University, Xinxiang, P. R. China), S. S. Sun(Institute of High Energy Physics, Beijing, P. R. China), X. D. Sun(Institute of High Energy Physics, Beijing, P. R. China), Y. J. Sun(University of Science and Technology of China, Hefei, P. R. China), Y. Z. Sun(Institute of High Energy Physics, Beijing, P. R. China), Z. J. Sun(Institute of High Energy Physics, Beijing, P. R. China), Z. T. Sun(University of Science and Technology of China, Hefei, P. R. China), C. J. Tang(Sichuan University, Chengdu, P. R. China), X. Tang(Institute of High Energy Physics, Beijing, P. R. China), E. H. Thorndike(University of Rochester, Rochester, New York, USA), H. L. Tian(Institute of High Energy Physics, Beijing, P. R. China), D. Toth(University of Minnesota, Minneapolis, MN, USA), M. U. Ulrich(Universitaet Giessen, Giessen, Germany), G. S. Varner(University of Hawaii, Honolulu, Hawaii, USA), B. Wang(GuangXi University, Nanning, P.R.China), B. Q. Wang(Peking University, Beijing, P. R. China), K. Wang(Institute of High Energy Physics, Beijing, P. R. China), L. L. Wang(China Center of Advanced Science and Technology, Beijing, P. R. China), L. S. Wang(Institute of High Energy Physics, Beijing, P. R. China), M. Wang(Shandong University, Jinan, P. R. China), P. Wang(Institute of High Energy Physics, Beijing, P. R. China), P. L. Wang(Institute of High Energy Physics, Beijing, P. R. China), Q. Wang(Peking University, Beijing, P. R. China), Q. J. Wang(Institute of High Energy Physics, Beijing, P. R. China), S. G. Wang(Peking University, Beijing, P. R. China), X. F. Wang(Henan Normal University, Xinxiang, P. R. China), X. L. Wang(University of Science and Technology of China, Hefei, P. R. China), Y. D. Wang(University of Science and Technology of China, Hefei, P. R. China), Y. F. Wang(Institute of High Energy Physics, Beijing, P. R. China), Y. Q. Wang(Shandong University, Jinan, P. R. China), Z. Wang(Institute of High Energy Physics, Beijing, P. R. China), Z. G. Wang(Institute of High Energy Physics, Beijing, P. R. China), Z. Y. Wang(Institute of High Energy Physics, Beijing, P. R. China), D. H. Wei(Guangxi Normal University, Guilin, P. R. China), P. Weidenkaff(Johannes Gutenberg University of Mainz, Mainz, Germany), Q. G. Wen(University of Science and Technology of China, Hefei, P. R. China), S. P. Wen(Institute of High Energy Physics, Beijing, P. R. China), M. W. Werner(Universitaet Giessen, Giessen, Germany), U. Wiedner(Bochum Ruhr-University, Bochum, Germany), L. H. Wu(Institute of High Energy Physics, Beijing, P. R. China), N. Wu(Institute of High Energy Physics, Beijing, P. R. China), S. X. Wu(University of Science and Technology of China, Hefei, P. R. China), W. Wu(Nankai University, Tianjin, P. R. China), Z. Wu(Institute of High Energy Physics, Beijing, P. R. China), L. G. Xia(Tsinghua University, Beijing, P. R. China), Z. J. Xiao(Nanjing Normal University, Nanjing, P. R. China), Y. G. Xie(Institute of High Energy Physics, Beijing, P. R. China), Q. L. Xiu(Institute of High Energy Physics, Beijing, P. R. China), G. F. Xu(Institute of High Energy Physics, Beijing, P. R. China), G. M. Xu(Peking University, Beijing, P. R. China), H. Xu(Institute of High Energy Physics, Beijing, P. R. China), Q. J. Xu(Hangzhou Normal University, Hangzhou, P. R. China), X. P. Xu(Soochow University, Suzhou, China), Y. Xu(Nankai University, Tianjin, P. R. China), Z. R. Xu(University of Science and Technology of China, Hefei, P. R. China), F. Xue(Huazhong Normal University, Wuhan, P. R. China), Z. Xue(Institute of High Energy Physics, Beijing, P. R. China), L. Yan(University of Science and Technology of China, Hefei, P. R. China), W. B. Yan(University of Science and Technology of China, Hefei, P. R. China), Y. H. Yan(Hunan University, Changsha, P. R. China), H. X. Yang(Institute of High Energy Physics, Beijing, P. R. China), T. Yang(GuangXi University, Nanning, P.R.China), Y. Yang(Huazhong Normal University, Wuhan, P. R. China), Y. X. Yang(Guangxi Normal University, Guilin, P. R. China), H. Ye(Institute of High Energy Physics, Beijing, P. R. China), M. Ye(Institute of High Energy Physics, Beijing, P. R. China), M. H. Ye(China Center of Advanced Science and Technology, Beijing, P. R. China), B. X. Yu(Institute of High Energy Physics, Beijing, P. R. China), C. X. Yu(Nankai University, Tianjin, P. R. China), J. S. Yu(Lanzhou University, Lanzhou, P. R. China), S. P. Yu(Shandong University, Jinan, P. R. China), C. Z. Yuan(Institute of High Energy Physics, Beijing, P. R. China), W. L. Yuan(Nanjing Normal University, Nanjing, P. R. China), Y. Yuan(Institute of High Energy Physics, Beijing, P. R. China), A. A. Zafar(University of the Punjab, Lahore, Pakistan), A. Z. Zallo(INFN Laboratori Nazionali di Frascati, Frascati, Italy), Y. Zeng(Hunan University, Changsha, P. R. China), B. X. Zhang(Institute of High Energy Physics, Beijing, P. R. China), B. Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), C. C. Zhang(Institute of High Energy Physics, Beijing, P. R. China), D. H. Zhang(Institute of High Energy Physics, Beijing, P. R. China), H. H. Zhang(Sun Yat-Sen University, Guangzhou, P. R. China), H. Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. Zhang(Nanjing Normal University, Nanjing, P. R. China), J. G. Zhang(Henan Normal University, Xinxiang, P. R. China), J. Q. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. W. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), J. Z. Zhang(Institute of High Energy Physics, Beijing, P. R. China), L. Zhang(Nanjing University, Nanjing, P. R. China), S. H. Zhang(Institute of High Energy Physics, Beijing, P. R. China), T. R. Zhang(Nanjing Normal University, Nanjing, P. R. China), X. J. Zhang(Institute of High Energy Physics, Beijing, P. R. China), X. Y. Zhang(Shandong University, Jinan, P. R. China), Y. Zhang(Institute of High Energy Physics, Beijing, P. R. China), Y. H. Zhang(Institute of High Energy Physics, Beijing, P. R. China), Y. S. Zhang(GuangXi University, Nanning, P.R.China), Z. P. Zhang(University of Science and Technology of China, Hefei, P. R. China), Z. Y. Zhang(Wuhan University, Wuhan, P. R. China), G. Zhao(Institute of High Energy Physics, Beijing, P. R. China), H. S. Zhao(Institute of High Energy Physics, Beijing, P. R. China), J. W. Zhao(Institute of High Energy Physics, Beijing, P. R. China), K. X. Zhao(Nanjing Normal University, Nanjing, P. R. China), Lei Zhao(University of Science and Technology of China, Hefei, P. R. China), Ling Zhao(Institute of High Energy Physics, Beijing, P. R. China), M. G. Zhao(Nankai University, Tianjin, P. R. China), Q. Zhao(Institute of High Energy Physics, Beijing, P. R. China), S. J. Zhao(Zhengzhou University, Zhengzhou, P. R. China), T. C. Zhao(Institute of High Energy Physics, Beijing, P. R. China), X. H. Zhao(Nanjing University, Nanjing, P. R. China), Y. B. Zhao(Institute of High Energy Physics, Beijing, P. R. China), Z. G. Zhao(University of Science and Technology of China, Hefei, P. R. China), A. Zhemchugov(20, a), B. Zheng(University of South China, Hengyang, P. R. China), J. P. Zheng(Institute of High Energy Physics, Beijing, P. R. China), Y. H. Zheng(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), Z. P. Zheng(Institute of High Energy Physics, Beijing, P. R. China), B. Zhong(Institute of High Energy Physics, Beijing, P. R. China), J. Zhong(Bochum Ruhr-University, Bochum, Germany), L. Zhou(Institute of High Energy Physics, Beijing, P. R. China), X. K. Zhou(Graduate University of Chinese Academy of Sciences, Beijing, P. R. China), X. R. Zhou(University of Science and Technology of China, Hefei, P. R. China), C. Zhu(Institute of High Energy Physics, Beijing, P. R. China), K. Zhu(Institute of High Energy Physics, Beijing, P. R. China), K. J. Zhu(Institute of High Energy Physics, Beijing, P. R. China), S. H. Zhu(Institute of High Energy Physics, Beijing, P. R. China), X. L. Zhu(Tsinghua University, Beijing, P. R. China), X. W. Zhu(Institute of High Energy Physics, Beijing, P. R. China), Y. M. Zhu(Nankai University, Tianjin, P. R. China), Y. S. Zhu(Institute of High Energy Physics, Beijing, P. R. China), Z. A. Zhu(Institute of High Energy Physics, Beijing, P. R. China), J. Zhuang(Institute of High Energy Physics, Beijing, P. R. China), B. S. Zou(Institute of High Energy Physics, Beijing, P. R. China), J. H. Zou(Institute of High Energy Physics, Beijing, P. R. China), and J. X. Zuo(Institute of High Energy Physics, Beijing, P. R. China)

Subjects
hep-ex, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

Based on a data sample of 106 M $\psi^{\prime}$ events collected with the BESIII detector, the decays $\psi^{\prime}\ar\gamma\chi_{c0, 2}$,$\chi_{c0, 2}\ar\gamma\gamma$ are studied to determine the two-photon widths of the $\chi_{c0, 2}$ states. The two-photon decay branching fractions are determined to be ${\cal B}(\chi_{c0}\ar\gamma\gamma) = (2.24\pm 0.19\pm 0.12\pm 0.08)\times 10^{-4}$ and ${\cal B}(\chi_{c2}\ar\gamma\gamma) = (3.21\pm 0.18\pm 0.17\pm 0.13)\times 10^{-4}$. From these, the two-photon widths are determined to be $\Gamma_{\gamma \gamma}(\chi_{c0}) = (2.33\pm0.20\pm0.13\pm0.17)$ keV, $\Gamma_{\gamma \gamma}(\chi_{c2}) = (0.63\pm0.04\pm0.04\pm0.04)$ keV, and $\cal R$ $=\Gamma_{\gamma \gamma}(\chi_{c2})/\Gamma_{\gamma \gamma}(\chi_{c0})=0.271\pm 0.029\pm 0.013\pm 0.027$, where the uncertainties are statistical, systematic, and those from the PDG ${\cal B}(\psi^{\prime}\ar\gamma\chi_{c0,2})$ and $\Gamma(\chi_{c0,2})$ errors, respectively. The ratio of the two-photon widths for helicity $\lambda=0$ and helicity $\lambda=2$ components in the decay $\chi_{c2}\ar\gamma\gamma$ is measured for the first time to be $f_{0/2} =\Gamma^{\lambda=0}_{\gamma\gamma}(\chi_{c2})/\Gamma^{\lambda=2}_{\gamma\gamma}(\chi_{c2}) = 0.00\pm0.02\pm0.02$.

Published
2015

23. Aqueous‐Processed Polymer/Nanocrystal Hybrid Solar Cells with Double‐Side Bulk Heterojunction.

Author

Jin, Gan, Chen, Nannan, Zeng, Qingsen, Liu, Fangyuan, Yuan, Wei, Xiang, Siyuan, Feng, Tanglue, Du, Xiaohang, Ji, Tianjiao, Wang, Lijing, Wang, Yaohua, Sun, Henan, Sun, Haizhu, and Yang, Bai

Subjects
SOLAR cells, HETEROJUNCTIONS, AQUEOUS solutions, PHOTOVOLTAIC power generation, ELECTRON transport
Abstract

Abstract: Aqueous‐solution‐processed solar cells (ASCs) are promising candidates of the next‐generation large‐area, low‐cost, and flexible photovoltaic conversion equipment because of their unique environmental friendly property. Aqueous‐solution‐processed polymer/nanocrystals (NCs) hybrid solar cells (AHSCs) can effectively integrate the advantages of the polymer (e.g., flexibility and lightweight) and the inorganic NCs (e.g., high mobility and broad absorption), and therefore be considered as an ideal system to further improve the performance of ASCs. In this work, double‐side bulk heterojunction (BHJ), in which one BHJ combines the active material with electron transport material and the other combines the active material with hole transport material, is developed in the AHSCs. Through comparing with the single‐side BHJ device, promoted carrier extraction, enhanced internal quantum efficiency, extended width of the depletion region, and prolonged carrier lifetime are achieved in double‐side BHJ devices. As a result, power conversion efficiency exceeding 6% is obtained, which breaks the bottleneck efficiency around ≈5.5%. This work demonstrates a device architecture which is more remarkable compared with the traditional only donor–acceptor blended BHJ. Under conservative estimation, it provides instructive architecture not only in the ASCs, but also in the organic solar cells (SCs), quantum dot SCs, and perovskite SCs. [ABSTRACT FROM AUTHOR]

Published
2018
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26. The genome sequence of segmental allotetraploid peanut Arachis hypogaea

Author

Richard W Michelmore, Brian Abernathy, Melanie Pham, Jacqueline D. Campbell, Sergio Sebastián Samoluk, Ethalinda K. S. Cannon, Marie Mirouze, Ziqi Sun, Scott A. Jackson, Jane Grimwood, Zheng Zheng, Christopher Lui, C. Corley Holbrook, Longhui Ren, Manish K. Pandey, Ye Chu, Kenta Shirasawa, Guillermo Seijo, Sudhansu Dash, Carolina Chavarro, Connor Cameron, Xinyou Zhang, Gaurav Agarwal, Lutz Froenicke, Sophie Lanciano, Andrew Farmer, Soraya C. M. Leal-Bertioli, Nathan T. Weeks, David J. Bertioli, Walid Korani, Senjuti Sinharoy, Olga Dudchenko, Carolina Ballén-Taborda, Rajeev K. Varshney, Annapurna Chitikineni, Jerry Jenkins, Steven B. Cannon, Peggy Ozias-Akins, Erez Lieberman Aiden, Moaine El Baidouri, Márcio C. Moretzsohn, Jeremy Schmutz, Jin Hee Shin, Wei Huang, Dongying Gao, Josh Clevenger, Brian E. Scheffler, Baozhu Guo, Kyung Do Kim, Avinash Sreedasyam, DOE Joint Genome Institute [Walnut Creek], Baylor College of Medicine (BCM), Baylor University, University of Georgia [USA], Laboratoire Génome et développement des plantes (LGDP), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Universität Bern [Bern] (UNIBE), Diversité, adaptation, développement des plantes (UMR DIADE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Genome Center and Department of Plant Sciences, University of California (UC), Purdue University [West Lafayette], United States Department of Energy, Université de Berne, Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), University of California, DAVID J. BERTIOLI, UNIVERSITY OF GEORGIA, USA, JERRY JENKINS, HUDSONALPHA INSTITUTE OF BIOTECHNOLOGY, USA, JOSH CLEVENGER, UNIVERSITY OF GEORGIA, USA, OLGA DUDCHENKO, BAYLOR COLLEGE OF MEDICINE, HOUSTON, USA, DONGYING GAO, UNIVERSITY OF GEORGIA, USA, GUILLERMO SEIJO, CONICETUNNE, ARGENTINA, SORAYA C. M. LEAL-BERTIOLI, UNIVERSITY OF GEORGIA, USA, LONGHUI REN, IOWA STATE UNIVERSITY, USA, ANDREW D. FARMER, NATIONAL CENTER FOR GENOME RESOURCES, USA, MANISH K. PANDEY, INTERNATIONAL CROPS RESEARCH INSTITUTE FOR THE SEMI-ARID TROPICS (ICRISAT), INDIA, SERGIO S. SAMOLUK, INSTITUTO DE BOTÁNICA DEL NORDESTE (CONICETUNNE), ARGENTINA, BRIAN ABERNATHY, UNIVERSITY OF GEORGIA, USA, GAURAV AGARWAL, UNIVERSITY OF GEORGIA, USA, CAROLINA BALLÉN-TABORDA, UNIVERSITY OF GEORGIA, USA, CONNOR CAMERON, NATIONAL CENTER FOR GENOME RESOURCES, USA, JACQUELINE CAMPBELL, IOWA STATE UNIVERSITY, USA, CAROLINA CHAVARRO, UNIVERSITY OF GEORGIA, USA, ANNAPURNA CHITIKINENI, INTERNATIONAL CROPS RESEARCH INSTITUTE FOR THE SEMI-ARID TROPICS (ICRISAT), INDIA, YE CHU, UNIVERSITY OF GEORGIA, USA, SUDHANSU DASH, NATIONAL CENTER FOR GENOME RESOURCES, USA, MOAINE EL BAIDOURI, UMR5096, FRANCE, BAOZHU GUO, CROP PROTECTION AND MANAGEMENT RESEARCH UNIT, USA, WEI HUANG, IOWA STATE UNIVERSITY, USA, KYUNG DO KIM, UNIVERSITY OF GEORGIA, USA, WALID KORANI, UNIVERSITY OF GEORGIA, USA, SOPHIE LANCIANO, UNIVERSITÉ DE PERPIGNAN, FRANCE, CHRISTOPHER G. LUI, BAYLOR COLLEGE OF MEDICINE, USA, MARIE MIROUZE, UNIVERSITÉ DE PERPIGNAN, FRANCE, MARCIO DE CARVALHO MORETZSOHN, Cenargen, MELANIE PHAM, BAYLOR COLLEGE OF MEDICINE, USA, JIN HEE SHIN, UNIVERSITY OF GEORGIA, USA, KENTA SHIRASAWA, KAZUSA DNA RESEARCH INSTITUTE, JAPAN, SENJUTI SINHAROY, NATIONAL INSTITUTE OF PLANT GENOME RESEARCH, INDIA, AVINASH SREEDASYAM, HUDSONALPHA INSTITUTE OF BIOTECHNOLOGY, USA, NATHAN T. WEEKS, US DEPARTMENT OF AGRICULTURE AGRICULTURAL RESEARCH SERVICE, USA, XINYOU ZHANG, HENAN ACADEMY OF AGRICULTURAL SCIENCES, CHINA, ZHENG ZHENG, HENAN ACADEMY OF AGRICULTURAL SCIENCES, CHINA, ZIQI SUN, HENAN ACADEMY OF AGRICULTURAL SCIENCES, CHINA, LUTZ FROENICKE, UNIVERSITY OF CALIFORNIA, DAVIS, USA, EREZ L. AIDEN, BAYLOR COLLEGE OF MEDICINE, USA, RICHARD MICHELMORE, UNIVERSITY OF CALIFORNIA, DAVIS, USA, RAJEEV K. VARSHNEY, INTERNATIONAL CROPS RESEARCH INSTITUTE FOR THE SEMI-ARID TROPICS (ICRISAT), INDIA, C. CORLEY HOLBROOK, US DEPARTMENT OF AGRICULTURE AGRICULTURAL RESEARCH SERVICE, USA, ETHALINDA K. S. CANNON, IOWA STATE UNIVERSITY, USA, BRIAN E. SCHEFFLER, US DEPARTMENT OF AGRICULTURE AGRICULTURAL RESEARCH SERVICE, USA, JANE GRIMWOOD, HUDSONALPHA INSTITUTE OF BIOTECHNOLOGY, USA, PEGGY OZIAS-AKINS, UNIVERSITY OF GEORGIA, USA, STEVEN B. CANNON, US DEPARTMENT OF AGRICULTURE AGRICULTURAL RESEARCH SERVICE, USA, SCOTT A. JACKSON, UNIVERSITY OF GEORGIA, USA, and JEREMY SCHMUTZ, HUDSONALPHA INSTITUTE OF BIOTECHNOLOGY, USA.

Subjects
Arachis, [SDV]Life Sciences [q-bio], Medical and Health Sciences, Genome, Domestication, 0302 clinical medicine, Gene Expression Regulation, Plant, ComputingMilieux_MISCELLANEOUS, Recombination, Genetic, 2. Zero hunger, Peanuts, 0303 health sciences, purl.org/becyt/ford/4.4 [https], food and beverages, Biodiversity, Biological Sciences, GENOME, Phenotype, Biotecnología Agrícola y Biotecnología Alimentaria, ARACHIS HYPOGAEA, Ploidy, SEGMENTAL ALLOTETRAPLOID, Genome, Plant, Crops, Agricultural, Plant genetics, DNA, Plant, Evolution, Biotecnología Agropecuaria, Argentina, Crops, Genomics, Biology, Chromosomes, Chromosomes, Plant, Evolution, Molecular, Polyploidy, 03 medical and health sciences, Genetic, Species Specificity, Polyploid, Genetics, Hybridization, 030304 developmental biology, Whole genome sequencing, Agricultural, Hypogaea, fungi, Molecular, Genetic Variation, Plant, DNA, DNA Methylation, biology.organism_classification, Base sequence, Recombination, Arachis hypogaea L, Arachis hypogaea, Tetraploidy, Gene Expression Regulation, CIENCIAS AGRÍCOLAS, Evolutionary biology, Hybridization, Genetic, purl.org/becyt/ford/4 [https], 030217 neurology & neurosurgery, Developmental Biology
Abstract

Like many other crops, the cultivated peanut (Arachis hypogaea L.) is of hybrid origin and has a polyploid genome that contains essentially complete sets of chromosomes from two ancestral species. Here we report the genome sequence of peanut and show that after its polyploid origin, the genome has evolved through mobile-element activity, deletions and by the flow of genetic information between corresponding ancestral chromosomes (that is, homeologous recombination). Uniformity of patterns of homeologous recombination at the ends of chromosomes favors a single origin for cultivated peanut and its wild counterpart A. monticola. However, through much of the genome, homeologous recombination has created diversity. Using new polyploid hybrids made from the ancestral species, we show how this can generate phenotypic changes such as spontaneous changes in the color of the flowers. We suggest that diversity generated by these genetic mechanisms helped to favor the domestication of the polyploid A. hypogaea over other diploid Arachis species cultivated by humans. Fil: Bertioli, David J.. University of Georgia; Estados Unidos Fil: Jenkins, Jerry. Hudsonalpha Institute For Biotechnology; Estados Unidos Fil: Clevenger, Josh. University of Georgia; Estados Unidos Fil: Dudchenko, Olga. The Center for Genome Architecture; Estados Unidos Fil: Gao, Dongying. University of Georgia; Estados Unidos Fil: Seijo, José Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Leal Bertioli, Soraya C.M.. Universidad Nacional del Nordeste; Argentina Fil: Ren, Longhui. University of Georgia; Estados Unidos Fil: Farmer, Andrew D.. University of Georgia; Estados Unidos Fil: Pandey, Manish K.. Center of Excellence in Genomics & Systems Biology, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT); India Fil: Samoluk, Sergio Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Botánica del Nordeste. Universidad Nacional del Nordeste. Facultad de Ciencias Agrarias. Instituto de Botánica del Nordeste; Argentina Fil: Abernathy, Brian. University of Georgia; Estados Unidos Fil: Agarwal, Gaurav. University of Georgia; Estados Unidos Fil: Ballén Taborda, Carolina. University of Georgia; Estados Unidos Fil: Cameron, Connor. National Center for Genome Resources; Estados Unidos Fil: Campbell, Jacqueline. University of Iowa; Estados Unidos Fil: Chavarro, Carolina. University of Georgia; Estados Unidos Fil: Chitikineni, Annapurna. Center of Excellence in Genomics & Systems Biology, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT); India Fil: Chu, Ye. University of Georgia; Estados Unidos Fil: Dash, Sudhansu. National Center for Genome Resources; Estados Unidos Fil: El Baidouri, Moaine. Centre National de la Recherche Scientifique; Francia Fil: Guo, Baozhu. University of Georgia; Estados Unidos Fil: Huang, Wei. University of Iowa; Estados Unidos Fil: Kim, Kyung Do. University of Georgia; Estados Unidos. Corporate R&D, LG Chem; Corea del Sur Fil: Korani, Walid. University of Georgia; Estados Unidos Fil: Lanciano, Sophie. Centre National de la Recherche Scientifique; Francia Fil: Lui, Christopher G.. The Center for Genome Architecture; Estados Unidos Fil: Mirouze, Marie. Centre National de la Recherche Scientifique; Francia Fil: Moretzsohn, Márcio C.. Ministerio da Agricultura Pecuaria e Abastecimento de Brasil. Empresa Brasileira de Pesquisa Agropecuaria; Brasil Fil: Pham, Melanie. The Center for Genome Architecture; Estados Unidos Fil: Shin, Jin Hee. University of Georgia; Estados Unidos Fil: Shirasawa, Kenta Shirasawa. Department of Frontier Research and Development, Kazusa DNA Research Institute; Japón Fil: Sinharoy, Senjuti. National Institute of Plant Genome Research; India Fil: Sreedasyam, Avinash. Hudson Alpha Institute of Biotechnology; Estados Unidos Fil: Weeks, Nathan T.. United States Department of Agriculture; Estados Unidos Fil: Zhang, Xinyou. Henan Academy of Agricultural Sciences; China Fil: Zheng, Zheng. Henan Academy of Agricultural Sciences; China Fil: Sun, Ziqi. Henan Academy of Agricultural Sciences; China Fil: Froenicke, Lutz. University of California at Davis; Estados Unidos Fil: Aiden, Erez L.. The Center for Genome Architecture; Estados Unidos Fil: Michelmore, Richard. University of California at Davis; Estados Unidos Fil: Varshney, Rajeev K.. Center of Excellence in Genomics & Systems Biology, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT); India Fil: Holbrook, C. Corley. United States Department of Agriculture; Estados Unidos Fil: Cannon, Ethalinda K. S.. University of Iowa; Estados Unidos Fil: Scheffler, Brian E.. United States Department of Agriculture; Estados Unidos Fil: Grimwood, Jane. Hudson Alpha Institute of Biotechnology; Estados Unidos Fil: Ozias-Akins, Peggy. University of Georgia; Estados Unidos Fil: Cannon, Steven B.. United States Department of Agriculture; Estados Unidos Fil: Jackson, Scott A.. University of Georgia; Estados Unidos Fil: Schmutz, Jeremy. Hudson Alpha Institute of Biotechnology; Estados Unidos

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