Study of the light scalar a0(980) through the decay D0 → a0(980)−e+νe with a0(980)− → ηπ−

作     者：Ablikim, M. Achasov, M.N. Adlarson, P. Afedulidis, O. Ai, X.C. Aliberti, R. Amoroso, A. An, Q. Bai, Y. Bakina, O. Balossino, I. Ban, Y. Bao, H.-R. Batozskaya, V. Begzsuren, K. Berger, N. Berlowski, M. Bertani, M. Bettoni, D. Bianchi, F. Bianco, E. Bortone, A. Boyko, I. Briere, R.A. Brueggemann, A. Cai, H. Cai, X. Calcaterra, A. Cao, G.F. Cao, N. Cetin, S.A. Chai, X.Y. Chang, J.F. Che, G.R. Che, Y.Z. Chelkov, G. Chen, 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. Choi, S.K. Cibinetto, G. Cossio, F. Cui, J.J. Dai, H.L. Dai, J.P. Dbeyssi, A. de Boer, R.E. Dedovich, D. Deng, C.Q. Deng, Z.Y. Denig, A. Denysenko, I. Destefanis, M. De Mori, F. Ding, B. Ding, X.X. Ding, Y. Ding, Y. Dong, J. Dong, L.Y. Dong, M.Y. Dong, X. Du, M.C. Du, S.X. Duan, Y.Y. Duan, Z.H. Egorov, P. Fan, Y.H. Fang, J. Fang, J. Fang, S.S. Fang, W.X. Fang, Y. Fang, Y.Q. Farinelli, R. Fava, L. Feldbauer, F. Felici, G. Feng, C.Q. Feng, J.H. Feng, Y.T. Fritsch, M. Fu, C.D. Fu, J.L. Fu, Y.W. Gao, H. Gao, X.B. Gao, Y.N. Gao, Yang Garbolino, S. Garzia, I. Ge, L. Ge, P.T. Ge, Z.W. Geng, C. Gersabeck, E.M. Gilman, A. Goetzen, K. Gong, L. Gong, W.X. Gradl, W. Gramigna, S. Greco, M. Gu, M.H. Gu, Y.T. Guan, C.Y. Guo, A.Q. Guo, L.B. Guo, M.J. Guo, R.P. Guo, Y.P. Guskov, A. Gutierrez, J. Han, K.L. Han, T.T. Hanisch, F. Hao, X.Q. Harris, F.A. He, K.K. He, K.L. Heinsius, F.H. Heinz, C.H. Heng, Y.K. Herold, C. Holtmann, T. Hong, P.C. Hou, G.Y. Hou, X.T. Hou, Y.R. Hou, Z.L. Hu, B.Y. Hu, H.M. Hu, J.F. Hu, Q.P. Hu, S.L. Hu, T. Hu, Y. Huang, G.S. Huang, K.X. Huang, L.Q. Huang, X.T. Huang, Y.P. Huang, Y.S. Hussain, T. Hölzken, F. Hüsken, N. in der Wiesche, N. Jackson, J. Janchiv, S. Jeong, J.H. 

作者机构：Institute of High Energy Physics Beijing100049 China Beihang University Beijing100191 China Bochum Ruhr-University BochumD-44780 Germany  Novosibirsk630090 Russia Carnegie Mellon University PittsburghPA15213 United States Central China Normal University Wuhan430079 China Central South University Changsha410083 China China Center of Advanced Science and Technology Beijing100190 China China University of Geosciences Wuhan430074 China Chung-Ang University Seoul06974 Korea Republic of COMSATS University Islamabad Lahore Campus Defence Road Off Raiwind Road Lahore54000 Pakistan Fudan University Shanghai200433 China GSI Helmholtzcentre for Heavy Ion Research GmbH DarmstadtD-64291 Germany Guangxi Normal University Guilin541004 China Guangxi University Nanning530004 China Hangzhou Normal University Hangzhou310036 China Hebei University Baoding071002 China Helmholtz Institute Mainz Staudinger Weg 18 MainzD-55099 Germany Henan Normal University Xinxiang453007 China Henan University Kaifeng475004 China Henan University of Science and Technology Luoyang471003 China Henan University of Technology Zhengzhou450001 China Huangshan College Huangshan245000 China Hunan Normal University Changsha410081 China Hunan University Changsha410082 China Indian Institute of Technology Madras Chennai600036 India Indiana University BloomingtonIN47405 United States INFN Laboratori Nazionali di Frascati FrascatiI-00044 Italy INFN Sezione di Perugia PerugiaI-06100 Italy University of Perugia PerugiaI-06100 Italy INFN Sezione di Ferrara FerraraI-44122 Italy University of Ferrara FerraraI-44122 Italy Inner Mongolia University Hohhot010021 China Institute of Modern Physics Lanzhou730000 China Institute of Physics and Technology Peace Avenue 54B Ulaanbaatar13330 Mongolia Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica1000000 Chile Jilin University Changchun130012 China Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45 MainzD-55099 Germany Joint Institute for Nuclear Research Moscow region Dubna141980 Russia Justus-Liebig-Universitaet Giessen II. Physikalisches Institut Heinrich-Buff-Ring 16 GiessenD-35392 Germany Lanzhou University Lanzhou730000 China Liaoning Normal University Dalian116029 China Liaoning University Shenyang110036 China Nanjing Normal University Nanjing210023 China Nanjing University Nanjing210093 China Nankai University Tianjin300071 China National Centre for Nuclear Research Warsaw02-093 Poland North China Electric Power University Beijing102206 China Peking University Beijing100871 China Qufu Normal University Qufu273165 China Renmin University of China Beijing100872 China Shandong Normal University Jinan250014 China Shandong University Jinan250100 China Shanghai Jiao Tong University Shanghai200240 China Shanxi Normal University Linfen041004 China Shanxi University Taiyuan030006 China Sichuan University Chengdu610064 China Soochow University Suzhou215006 China South China Normal University Guangzhou510006 China Southeast University Nanjing211100 China State Key Laboratory of Particle Detection and Electronics Beijing100049 China State Key Laboratory of Particle Detection and Electronics Hefei230026 China Sun Yat-Sen University Guangzhou510275 China Suranaree University of Technology University Avenue 111 Nakhon Ratchasima30000 Thailand Tsinghua University Beijing100084 China Turkish Accelerator Center Particle Factory Group Istinye University Istanbul34010 Turkey Near East University Mersin 10 Turkey Nicosia99138 Cyprus University of Bristol H H Wills Physics Laboratory Tyndall Avenue BristolBS8 1TL United Kingdom University of Chinese Academy of Sciences Beijing100049 China University of Groningen GroningenNL-9747 AA Netherlands University of Hawaii HonoluluHI96822 United States University of Jinan Jinan250022 China University of Manchester Oxford Road ManchesterM13 9PL United Kingdom University of Muenster Wilhelm-Klemm-Strasse 9 Muenster48149 Germany University of Oxford Keble Road OxfordOX13RH United Kingdom University of Science and Technology Liaoning Anshan114051 China University of Science and Technology of China Hefei230026 China University of South China Hengyang421001 China University of the Punjab Lahore54590 Pakistan University of Turin and INFN University of Turin TurinI-10125 Italy University of Eastern Piedmont AlessandriaI-15121 Italy INFN TurinI-10125 Italy Uppsala University Box 516 UppsalaSE-75120 Sweden Wuhan University Wuhan430072 China Yantai University Yantai264005 China Yunnan University Kunming650500 China Zhejiang University Hangzhou310027 China Zhengzhou University Zhengzhou450001 China Moscow Institute of Physics and Technology Moscow141700 Russia Novosibirsk State University Novosibirsk630090 Russia NRC"Kurchatov Institute" PNPI Gatchina188300 Russia 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

摘      要：Using 7.93 fb−1 of e+e− collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we present an analysis of the decay D0 → ηπ−e+νe. The branching fraction of the decay D0 → a0(980)−e+νe with a0(980)− → ηπ− is measured to be (0.86±0.17stat±0.05syst)×10−4. The decay dynamics of this process is studied with a single-pole parameterization of the hadronic form factor and the Flatté formula describing the a0(980) line shape in the differential decay rate. The product of the form factor f+a0(0) and the Cabibbo-Kobayashi-Maskawa matrix element |Vcd| is determined for the first time with the result f+a0(0)|Vcd| = 0.126 ± 0.013stat ± 0.003syst. Copyright © 2024, The Authors. All rights reserved.