Evidence for a Neutral Near-Threshold Structure in the K_{S}^{0} Recoil-Mass Spectra in e^{+}e^{-}→K_{S}^{0}D_{s}^{+}D^{*-} and e^{+}e^{-}→K_{S}^{0}D_{s}^{*+}D^{-}
Affiliations
- 1 Institute of High Energy Physics, Beijing 100049, People's Republic of China.
- 2 G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
- 3 Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
- 4 Bochum Ruhr-University, D-44780 Bochum, Germany.
- 5 Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
- 6 University of Turin, I-10125, Turin, Italy.
- 7 INFN, I-10125, Turin, Italy.
- 8 Liaoning Normal University, Dalian 116029, People's Republic of China.
- 9 State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
- 10 University of Science and Technology of China, Hefei 230026, People's Republic of China.
- 11 University of Jinan, Jinan 250022, People's Republic of China.
- 12 Southeast University, Nanjing 211100, People's Republic of China.
- 13 Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
- 14 INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
- 15 INFN Sezione di Ferrara, I-44122, Ferrara, Italy.
- 16 Peking University, Beijing 100871, People's Republic of China.
- 17 National Centre for Nuclear Research, Warsaw 02-093, Poland.
- 18 Institute of Physics and Technology, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia.
- 19 University of Muenster, Wilhelm-Klemm-Strasse 9, 48149 Muenster, Germany.
- 20 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
- 21 Wuhan University, Wuhan 430072, People's Republic of China.
- 22 University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
- 23 Turkish Accelerator Center Particle Factory Group, Istinye University, 34010, Istanbul, Turkey.
- 24 Nankai University, Tianjin 300071, People's Republic of China.
- 25 Soochow University, Suzhou 215006, People's Republic of China.
- 26 Nanjing University, Nanjing 210093, People's Republic of China.
- 27 Tsinghua University, Beijing 100084, People's Republic of China.
- 28 Institute of Modern Physics, Lanzhou 730000, People's Republic of China.
- 29 Hunan University, Changsha 410082, People's Republic of China.
- 30 Shandong University, Jinan 250100, People's Republic of China.
- 31 Yunnan University, Kunming 650500, People's Republic of China.
- 32 Helmholtz Institute Mainz, Staudinger Weg 18, D-55099 Mainz, Germany.
- 33 Liaoning University, Shenyang 110036, People's Republic of China.
- 34 Zhengzhou University, Zhengzhou 450001, People's Republic of China.
- 35 University of Eastern Piedmont, I-15121, Alessandria, Italy.
- 36 Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
- 37 University of Oxford, Keble Road, Oxford OX13RH, United Kingdom.
- 38 University of Ferrara, I-44122, Ferrara, Italy.
- 39 University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom.
- 40 GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
- 41 Guangxi University, Nanning 530004, People's Republic of China.
- 42 Nanjing Normal University, Nanjing 210023, People's Republic of China.
- 43 Shandong Normal University, Jinan 250014, People's Republic of China.
- 44 Fudan University, Shanghai 200433, People's Republic of China.
- 45 Henan Normal University, Xinxiang 453007, People's Republic of China.
- 46 University of Hawaii, Honolulu, Hawaii 96822, USA.
- 47 Suranaree University of Technology, University Avenue 111, Nakhon Ratchasima 30000, Thailand.
- 48 South China Normal University, Guangzhou 510006, People's Republic of China.
- 49 University of South China, Hengyang 421001, People's Republic of China.
- 50 University of the Punjab, Lahore-54590, Pakistan.
- 51 Indiana University, Bloomington, Indiana 47405, USA.
- 52 Huangshan College, Huangshan 245000, People's Republic of China.
- 53 University of Groningen, NL-9747 AA Groningen, The Netherlands.
- 54 Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.
- 55 Indian Institute of Technology Madras, Chennai 600036, India.
- 56 Qufu Normal University, Qufu 273165, People's Republic of China.
- 57 Shanxi Normal University, Linfen 041004, People's Republic of China.
- 58 Beijing Institute of Petrochemical Technology, Beijing 102617, People's Republic of China.
- 59 Lanzhou University, Lanzhou 730000, People's Republic of China.
- 60 Jilin University, Changchun 130012, People's Republic of China.
- 61 Sichuan University, Chengdu 610064, People's Republic of China.
- 62 Guangxi Normal University, Guilin 541004, People's Republic of China.
- 63 Shanxi University, Taiyuan 030006, People's Republic of China.
- 64 Central China Normal University, Wuhan 430079, People's Republic of China.
- 65 Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
- 66 Henan University of Technology, Zhengzhou 450001, People's Republic of China.
- 67 Central South University, Changsha 410083, People's Republic of China.
- 68 Zhejiang University, Hangzhou 310027, People's Republic of China.
- 69 COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
- 70 INFN Sezione di Perugia, I-06100, Perugia, Italy.
- 71 University of Perugia, I-06100, Perugia, Italy.
- 72 Hunan Normal University, Changsha 410081, People's Republic of China.
- 73 Near East University, Nicosia, North Cyprus, Mersin 10, Turkey.
- 74 North China Electric Power University, Beijing 102206, People's Republic of China.
- 75 Hebei University, Baoding 071002, People's Republic of China.
- 76 Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
- 77 Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
- 78 China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
- 79 Beihang University, Beijing 100191, People's Republic of China.
- 80 Xinyang Normal University, Xinyang 464000, People's Republic of China.
- 81 University of Science and Technology Liaoning, Anshan 114051, People's Republic of China.
- PMID: 36154413
- DOI: 10.1103/PhysRevLett.129.112003
Evidence for a Neutral Near-Threshold Structure in the K_{S}^{0} Recoil-Mass Spectra in e^{+}e^{-}→K_{S}^{0}D_{s}^{+}D^{*-} and e^{+}e^{-}→K_{S}^{0}D_{s}^{*+}D^{-}
Authors
Affiliations
- 1 Institute of High Energy Physics, Beijing 100049, People's Republic of China.
- 2 G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
- 3 Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
- 4 Bochum Ruhr-University, D-44780 Bochum, Germany.
- 5 Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
- 6 University of Turin, I-10125, Turin, Italy.
- 7 INFN, I-10125, Turin, Italy.
- 8 Liaoning Normal University, Dalian 116029, People's Republic of China.
- 9 State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
- 10 University of Science and Technology of China, Hefei 230026, People's Republic of China.
- 11 University of Jinan, Jinan 250022, People's Republic of China.
- 12 Southeast University, Nanjing 211100, People's Republic of China.
- 13 Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
- 14 INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
- 15 INFN Sezione di Ferrara, I-44122, Ferrara, Italy.
- 16 Peking University, Beijing 100871, People's Republic of China.
- 17 National Centre for Nuclear Research, Warsaw 02-093, Poland.
- 18 Institute of Physics and Technology, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia.
- 19 University of Muenster, Wilhelm-Klemm-Strasse 9, 48149 Muenster, Germany.
- 20 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
- 21 Wuhan University, Wuhan 430072, People's Republic of China.
- 22 University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
- 23 Turkish Accelerator Center Particle Factory Group, Istinye University, 34010, Istanbul, Turkey.
- 24 Nankai University, Tianjin 300071, People's Republic of China.
- 25 Soochow University, Suzhou 215006, People's Republic of China.
- 26 Nanjing University, Nanjing 210093, People's Republic of China.
- 27 Tsinghua University, Beijing 100084, People's Republic of China.
- 28 Institute of Modern Physics, Lanzhou 730000, People's Republic of China.
- 29 Hunan University, Changsha 410082, People's Republic of China.
- 30 Shandong University, Jinan 250100, People's Republic of China.
- 31 Yunnan University, Kunming 650500, People's Republic of China.
- 32 Helmholtz Institute Mainz, Staudinger Weg 18, D-55099 Mainz, Germany.
- 33 Liaoning University, Shenyang 110036, People's Republic of China.
- 34 Zhengzhou University, Zhengzhou 450001, People's Republic of China.
- 35 University of Eastern Piedmont, I-15121, Alessandria, Italy.
- 36 Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
- 37 University of Oxford, Keble Road, Oxford OX13RH, United Kingdom.
- 38 University of Ferrara, I-44122, Ferrara, Italy.
- 39 University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom.
- 40 GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
- 41 Guangxi University, Nanning 530004, People's Republic of China.
- 42 Nanjing Normal University, Nanjing 210023, People's Republic of China.
- 43 Shandong Normal University, Jinan 250014, People's Republic of China.
- 44 Fudan University, Shanghai 200433, People's Republic of China.
- 45 Henan Normal University, Xinxiang 453007, People's Republic of China.
- 46 University of Hawaii, Honolulu, Hawaii 96822, USA.
- 47 Suranaree University of Technology, University Avenue 111, Nakhon Ratchasima 30000, Thailand.
- 48 South China Normal University, Guangzhou 510006, People's Republic of China.
- 49 University of South China, Hengyang 421001, People's Republic of China.
- 50 University of the Punjab, Lahore-54590, Pakistan.
- 51 Indiana University, Bloomington, Indiana 47405, USA.
- 52 Huangshan College, Huangshan 245000, People's Republic of China.
- 53 University of Groningen, NL-9747 AA Groningen, The Netherlands.
- 54 Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.
- 55 Indian Institute of Technology Madras, Chennai 600036, India.
- 56 Qufu Normal University, Qufu 273165, People's Republic of China.
- 57 Shanxi Normal University, Linfen 041004, People's Republic of China.
- 58 Beijing Institute of Petrochemical Technology, Beijing 102617, People's Republic of China.
- 59 Lanzhou University, Lanzhou 730000, People's Republic of China.
- 60 Jilin University, Changchun 130012, People's Republic of China.
- 61 Sichuan University, Chengdu 610064, People's Republic of China.
- 62 Guangxi Normal University, Guilin 541004, People's Republic of China.
- 63 Shanxi University, Taiyuan 030006, People's Republic of China.
- 64 Central China Normal University, Wuhan 430079, People's Republic of China.
- 65 Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
- 66 Henan University of Technology, Zhengzhou 450001, People's Republic of China.
- 67 Central South University, Changsha 410083, People's Republic of China.
- 68 Zhejiang University, Hangzhou 310027, People's Republic of China.
- 69 COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
- 70 INFN Sezione di Perugia, I-06100, Perugia, Italy.
- 71 University of Perugia, I-06100, Perugia, Italy.
- 72 Hunan Normal University, Changsha 410081, People's Republic of China.
- 73 Near East University, Nicosia, North Cyprus, Mersin 10, Turkey.
- 74 North China Electric Power University, Beijing 102206, People's Republic of China.
- 75 Hebei University, Baoding 071002, People's Republic of China.
- 76 Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
- 77 Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.
- 78 China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
- 79 Beihang University, Beijing 100191, People's Republic of China.
- 80 Xinyang Normal University, Xinyang 464000, People's Republic of China.
- 81 University of Science and Technology Liaoning, Anshan 114051, People's Republic of China.
- PMID: 36154413
- DOI: 10.1103/PhysRevLett.129.112003
Abstract
We study the processes e^{+}e^{-}→K_{S}^{0}D_{s}^{+}D^{*-} and e^{+}e^{-}→K_{S}^{0}D_{s}^{*+}D^{-}, as well as their charge conjugated processes, at five center-of-mass energies between 4.628 and 4.699 GeV, using data samples corresponding to an integrated luminosity of 3.8 fb^{-1} collected by the BESIII detector at the BEPCII storage ring. Based on a partial reconstruction technique, we find evidence of a structure near the thresholds for D_{s}^{+}D^{*-} and D_{s}^{*+}D^{-} production in the K_{S}^{0} recoil-mass spectrum, which we refer to as the Z_{cs}(3985)^{0}. Fitting with a Breit-Wigner line shape, we find the mass of the structure to be (3992.2±1.7±1.6) MeV/c^{2} and the width to be (7.7_{-3.8}^{+4.1}±4.3) MeV, where the first uncertainties are statistical and the second are systematic. The significance of the Z_{cs}(3985)^{0} signal is found to be 4.6σ including both the statistical and systematic uncertainty. We report the Born cross section multiplied by the branching fraction at different energy points. The mass of the Z_{cs}(3985)^{0} is close to that of the Z_{cs}(3985)^{+}. Assuming SU(3) symmetry, the cross section of the neutral channel is consistent with that of the charged one. Hence, we conclude that the Z_{cs}(3985)^{0} is the isospin partner of the Z_{cs}(3985)^{+}.