Study of e(+)e(-)→ωχ(cJ) at center of mass energies from 4.21 to 4.42 GeV
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 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
- 4 Bochum Ruhr-University, D-44780 Bochum, Germany.
- 5 University of Rochester, Rochester, New York 14627, USA.
- 6 University of Turin, I-10125 Turin, Italy.
- 7 INFN, I-10125 Turin, Italy.
- 8 University of Science and Technology of China, Hefei 230026, People's Republic of China.
- 9 INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
- 10 Peking University, Beijing 100871, People's Republic of China.
- 11 Indiana University, Bloomington, Indiana 47405, USA.
- 12 INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
- 13 University of Minnesota, Minneapolis, Minnesota 55455, USA.
- 14 Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia.
- 15 KVI-CART, University of Groningen, NL-9747 AA Groningen, The Netherlands.
- 16 Wuhan University, Wuhan 430072, People's Republic of China.
- 17 Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey.
- 18 Dogus University, 34722 Istanbul, Turkey.
- 19 Beihang University, Beijing 100191, People's Republic of China.
- 20 Nanjing University, Nanjing 210093, People's Republic of China.
- 21 Lanzhou University, Lanzhou 730000, People's Republic of China.
- 22 Huangshan College, Huangshan 245000, People's Republic of China.
- 23 Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
- 24 Liaoning University, Shenyang 110036, People's Republic of China.
- 25 Nankai University, Tianjin 300071, People's Republic of China.
- 26 Zhengzhou University, Zhengzhou 450001, People's Republic of China.
- 27 Tsinghua University, Beijing 100084, People's Republic of China.
- 28 University of Eastern Piedmont, I-15121 Alessandria, Italy.
- 29 GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
- 30 GuangXi University, Nanning 530004, People's Republic of China.
- 31 Nanjing Normal University, Nanjing 210023, People's Republic of China.
- 32 University of Hawaii, Honolulu, Hawaii 96822, USA.
- 33 Central China Normal University, Wuhan 430079, People's Republic of China.
- 34 Henan Normal University, Xinxiang 453007, People's Republic of China.
- 35 Shandong University, Jinan 250100, People's Republic of China.
- 36 University of the Punjab, Lahore 54590, Pakistan.
- 37 Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
- 38 Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
- 39 Justus Liebig University Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.
- 40 Seoul National University, Seoul 151-747, Korea.
- 41 Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
- 42 University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
- 43 Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
- 44 Sichuan University, Chengdu 610064, People's Republic of China.
- 45 Guangxi Normal University, Guilin 541004, People's Republic of China.
- 46 Shanxi University, Taiyuan 030006, People's Republic of China.
- 47 Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
- 48 Hunan University, Changsha 410082, People's Republic of China.
- 49 Zhejiang University, Hangzhou 310027, People's Republic of China.
- 50 COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
- 51 INFN and University of Perugia, I-06100 Perugia, Italy.
- 52 University of Ferrara, I-44122 Ferrara, Italy.
- 53 Uludag University, 16059 Bursa, Turkey.
- 54 Soochow University, Suzhou 215006, People's Republic of China.
- 55 China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
- 56 University of South China, Hengyang 421001, People's Republic of China.
- PMID: 25793804
- DOI: 10.1103/PhysRevLett.114.092003
Study of e(+)e(-)→ωχ(cJ) at center of mass energies from 4.21 to 4.42 GeV
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 Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
- 4 Bochum Ruhr-University, D-44780 Bochum, Germany.
- 5 University of Rochester, Rochester, New York 14627, USA.
- 6 University of Turin, I-10125 Turin, Italy.
- 7 INFN, I-10125 Turin, Italy.
- 8 University of Science and Technology of China, Hefei 230026, People's Republic of China.
- 9 INFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy.
- 10 Peking University, Beijing 100871, People's Republic of China.
- 11 Indiana University, Bloomington, Indiana 47405, USA.
- 12 INFN Sezione di Ferrara, I-44122 Ferrara, Italy.
- 13 University of Minnesota, Minneapolis, Minnesota 55455, USA.
- 14 Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia.
- 15 KVI-CART, University of Groningen, NL-9747 AA Groningen, The Netherlands.
- 16 Wuhan University, Wuhan 430072, People's Republic of China.
- 17 Ankara University, Dogol Caddesi, 06100 Tandogan, Ankara, Turkey.
- 18 Dogus University, 34722 Istanbul, Turkey.
- 19 Beihang University, Beijing 100191, People's Republic of China.
- 20 Nanjing University, Nanjing 210093, People's Republic of China.
- 21 Lanzhou University, Lanzhou 730000, People's Republic of China.
- 22 Huangshan College, Huangshan 245000, People's Republic of China.
- 23 Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
- 24 Liaoning University, Shenyang 110036, People's Republic of China.
- 25 Nankai University, Tianjin 300071, People's Republic of China.
- 26 Zhengzhou University, Zhengzhou 450001, People's Republic of China.
- 27 Tsinghua University, Beijing 100084, People's Republic of China.
- 28 University of Eastern Piedmont, I-15121 Alessandria, Italy.
- 29 GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany.
- 30 GuangXi University, Nanning 530004, People's Republic of China.
- 31 Nanjing Normal University, Nanjing 210023, People's Republic of China.
- 32 University of Hawaii, Honolulu, Hawaii 96822, USA.
- 33 Central China Normal University, Wuhan 430079, People's Republic of China.
- 34 Henan Normal University, Xinxiang 453007, People's Republic of China.
- 35 Shandong University, Jinan 250100, People's Republic of China.
- 36 University of the Punjab, Lahore 54590, Pakistan.
- 37 Uppsala University, Box 516, SE-75120 Uppsala, Sweden.
- 38 Helmholtz Institute Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany.
- 39 Justus Liebig University Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.
- 40 Seoul National University, Seoul 151-747, Korea.
- 41 Hangzhou Normal University, Hangzhou 310036, People's Republic of China.
- 42 University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
- 43 Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.
- 44 Sichuan University, Chengdu 610064, People's Republic of China.
- 45 Guangxi Normal University, Guilin 541004, People's Republic of China.
- 46 Shanxi University, Taiyuan 030006, People's Republic of China.
- 47 Henan University of Science and Technology, Luoyang 471003, People's Republic of China.
- 48 Hunan University, Changsha 410082, People's Republic of China.
- 49 Zhejiang University, Hangzhou 310027, People's Republic of China.
- 50 COMSATS Institute of Information Technology, Lahore, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan.
- 51 INFN and University of Perugia, I-06100 Perugia, Italy.
- 52 University of Ferrara, I-44122 Ferrara, Italy.
- 53 Uludag University, 16059 Bursa, Turkey.
- 54 Soochow University, Suzhou 215006, People's Republic of China.
- 55 China Center of Advanced Science and Technology, Beijing 100190, People's Republic of China.
- 56 University of South China, Hengyang 421001, People's Republic of China.
- PMID: 25793804
- DOI: 10.1103/PhysRevLett.114.092003
Abstract
Based on data samples collected with the BESIII detector at the BEPCII collider at nine center of mass energies from 4.21 to 4.42 GeV, we search for the production of e^{+}e^{-}→ωχ_{cJ} (J=0, 1, 2). The process e^{+}e^{-}→ωχ_{c0} is observed for the first time, and the Born cross sections at sqrt[s]=4.23 and 4.26 GeV are measured to be (55.4±6.0±5.9) and (23.7±5.3±3.5) pb, respectively, where the first uncertainties are statistical and the second are systematic. The ωχ_{c0} signals at the other seven energies and the e^{+}e^{-}→ωχ_{c1} and ωχ_{c2} signals are not significant, and the upper limits on the cross sections are determined. By examining the ωχ_{c0} cross section as a function of center of mass energy, we find that it is inconsistent with the line shape of the Y(4260) observed in e^{+}e^{-}→π^{+}π^{-}J/ψ. Assuming the ωχ_{c0} signals come from a single resonance, we extract the mass and width of the resonance to be (4230±8±6) MeV/c^{2} and (38±12±2) MeV, respectively, and the statistical significance is more than 9σ.
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