- Physical Review Journals
All JournalsPhysics Magazine

Physical Review D

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

Export citation

Export citation

Choose format for download:

Download Citation
  • Letter
  • Open Access

Measurement of the cross section for e+e−→ΛΛ¯ and evidence of the decay ψ(3770)→ΛΛ¯

M. Ablikim1, M. N. Achasov10,b, P. Adlarson67, S. Ahmed15, M. Albrecht4, R. Aliberti28, A. Amoroso66a,66c, M. R. An32, Q. An63,49 et al. (BESIII Collaboration)

Q. An63,49, X. H. Bai57, Y. Bai48, O. Bakina29, R. Baldini Ferroli23a, I. Balossino24a, Y. Ban38,h, K. Begzsuren26, N. Berger28, M. Bertani23a, D. Bettoni24a, F. Bianchi66a,66c, J. Bloms60, A. Bortone66a,66c, I. Boyko29, R. A. Briere5, H. Cai68, X. Cai1,49, A. Calcaterra23a, G. F. Cao1,54, N. Cao1,54, S. A. Cetin53a, J. F. Chang1,49, W. L. Chang1,54, G. Chelkov29,a, D. Y. Chen6, G. Chen1, H. S. Chen1,54, M. L. Chen1,49, S. J. Chen35, X. R. Chen25, Y. B. Chen1,49, Z. J. Chen20,i, W. S. Cheng66c, G. Cibinetto24a, F. Cossio66c, X. F. Cui36, H. L. Dai1,49, J. P. Dai42,e, X. C. Dai1,54, A. Dbeyssi15, R. E. de Boer4, D. Dedovich29, Z. Y. Deng1, A. Denig28, I. Denysenko29, M. Destefanis66a,66c, F. De Mori66a,66c, Y. Ding33, C. Dong36, J. Dong1,49, L. Y. Dong1,54, M. Y. Dong1,49,54, X. Dong68, S. X. Du71, Y. L. Fan68, J. Fang1,49, S. S. Fang1,54, Y. Fang1, R. Farinelli24a, L. Fava66b,66c, F. Feldbauer4, G. Felici23a, C. Q. Feng63,49, J. H. Feng50, M. Fritsch4, C. D. Fu1, Y. Gao64, Y. Gao38,h, Y. Gao63,49, Y. G. Gao6, I. Garzia24a,24b, P. T. Ge68, C. Geng50, E. M. Gersabeck58, A. Gilman61, K. Goetzen11, L. Gong33, W. X. Gong1,49, W. Gradl28, M. Greco66a,66c, L. M. Gu35, M. H. Gu1,49, Y. T. Gu13, C. Y. Guan1,54, A. Q. Guo22, L. B. Guo34, R. P. Guo40, Y. P. Guo9,f, A. Guskov29,a, T. T. Han41, W. Y. Han32, X. Q. Hao16, F. A. Harris56, K. L. He1,54, F. H. Heinsius4, C. H. Heinz28, Y. K. Heng1,49,54, C. Herold51, M. Himmelreich11,d, T. Holtmann4, G. Y. Hou1,54, Y. R. Hou54, Z. L. Hou1, H. M. Hu1,54, J. F. Hu47,j, T. Hu1,49,54, Y. Hu1, G. S. Huang63,49, L. Q. Huang64, X. T. Huang41, Y. P. Huang1, Z. Huang38,h, T. Hussain65, N. Hüsken22,28, W. Ikegami Andersson67, W. Imoehl22, M. Irshad63,49, S. Jaeger4, S. Janchiv26, Q. Ji1, Q. P. Ji16, X. B. Ji1,54, X. L. Ji1,49, Y. Y. Ji41, H. B. Jiang41, X. S. Jiang1,49,54, J. B. Jiao41, Z. Jiao18, S. Jin35, Y. Jin57, M. Q. Jing1,54, T. Johansson67, N. Kalantar-Nayestanaki55, X. S. Kang33, R. Kappert55, M. Kavatsyuk55, B. C. Ke43,1, I. K. Keshk4, A. Khoukaz60, P. Kiese28, R. Kiuchi1, R. Kliemt11, L. Koch30, O. B. Kolcu53a, B. Kopf4, M. Kuemmel4, M. Kuessner4, A. Kupsc67, M. G. Kurth1,54, W. Kühn30, J. J. Lane58, J. S. Lange30, P. Larin15, A. Lavania21, L. Lavezzi66a,66c, Z. H. Lei63,49, H. Leithoff28, M. Lellmann28, T. Lenz28, C. Li39, C. H. Li32, Cheng Li63,49, D. M. Li71, F. Li1,49, G. Li1, H. Li63,49, H. Li43, H. B. Li1,54, H. J. Li16, J. L. Li41, J. Q. Li4, J. S. Li50, Ke Li1, L. K. Li1, Lei Li3, P. R. Li31,k,l, S. Y. Li52, W. D. Li1,54, W. G. Li1, X. H. Li63,49, X. L. Li41, Xiaoyu Li1,54, Z. Y. Li50, H. Liang1,54, H. Liang63,49, H. Liang27, Y. F. Liang45, Y. T. Liang25, G. R. Liao12, L. Z. Liao1,54, J. Libby21, C. X. Lin50, B. J. Liu1, C. X. Liu1, D. Liu15,63, F. H. Liu44, Fang Liu1, Feng Liu6, H. B. Liu13, H. M. Liu1,54, Huanhuan Liu1, Huihui Liu17, J. B. Liu63,49, J. L. Liu64, J. Y. Liu1,54, K. Liu1, K. Y. Liu33, Ke Liu6, L. Liu63,49, M. H. Liu9,f, P. L. Liu1, Q. Liu68, Q. Liu54, S. B. Liu63,49, Shuai Liu46, T. Liu1,54, W. M. Liu63,49, X. Liu31,k,l, Y. Liu31,k,l, Y. B. Liu36, Z. A. Liu1,49,54, Z. Q. Liu41, X. C. Lou1,49,54, F. X. Lu50, H. J. Lu18, J. D. Lu1,54, J. G. Lu1,49, X. L. Lu1, Y. Lu1, Y. P. Lu1,49, C. L. Luo34, M. X. Luo70, P. W. Luo50, T. Luo9,f, X. L. Luo1,49, X. R. Lyu54, F. C. Ma33, H. L. Ma1, L. L. Ma41, M. M. Ma1,54, Q. M. Ma1, R. Q. Ma1,54, R. T. Ma54, X. X. Ma1,54, X. Y. Ma1,49, F. E. Maas15, M. Maggiora66a,66c, S. Maldaner4, S. Malde61, Q. A. Malik65, A. Mangoni23b, Y. J. Mao38,h, Z. P. Mao1, S. Marcello66a,66c, Z. X. Meng57, J. G. Messchendorp55, G. Mezzadri24a, T. J. Min35, R. E. Mitchell22, X. H. Mo1,49,54, N. Yu. Muchnoi10,b, H. Muramatsu59, S. Nakhoul11,d, Y. Nefedov29, F. Nerling11,d, I. B. Nikolaev10,b, Z. Ning1,49, S. Nisar8,g, Q. Ouyang1,49,54, S. Pacetti23b,23c, X. Pan9,f, Y. Pan58, A. Pathak1, A. Pathak27, P. Patteri23a, M. Pelizaeus4, H. P. Peng63,49, K. Peters11,d, J. Pettersson67, J. L. Ping34, R. G. Ping1,54, S. Pogodin29, R. Poling59, V. Prasad63,49, H. Qi63,49, H. R. Qi52, K. H. Qi25, M. Qi35, T. Y. Qi9, S. Qian1,49, W. B. Qian54, Z. Qian50, C. F. Qiao54, L. Q. Qin12, X. P. Qin9, X. S. Qin41, Z. H. Qin1,49, J. F. Qiu1, S. Q. Qu36, K. H. Rashid65, K. Ravindran21, C. F. Redmer28, A. Rivetti66c, V. Rodin55, M. Rolo66c, G. Rong1,54, Ch. Rosner15, M. Rump60, H. S. Sang63, A. Sarantsev29,c, Y. Schelhaas28, C. Schnier4, K. Schoenning67, M. Scodeggio24a,24b, D. C. Shan46, W. Shan19, X. Y. Shan63,49, J. F. Shangguan46, M. Shao63,49, C. P. Shen9, H. F. Shen1,54, P. X. Shen36, X. Y. Shen1,54, H. C. Shi63,49, R. S. Shi1,54, X. Shi1,49, X. D. Shi63,49, J. J. Song41, W. M. Song27,1, Y. X. Song38,h, S. Sosio66a,66c, S. Spataro66a,66c, K. X. Su68, P. P. Su46, F. F. Sui41, G. X. Sun1, H. K. Sun1, J. F. Sun16, L. Sun68, S. S. Sun1,54, T. Sun1,54, W. Y. Sun27, W. Y. Sun34, X. Sun20,i, Y. J. Sun63,49, Y. K. Sun63,49, Y. Z. Sun1, Z. T. Sun1, Y. H. Tan68, Y. X. Tan63,49, C. J. Tang45, G. Y. Tang1, J. Tang50, J. X. Teng63,49, V. Thoren67, W. H. Tian43, Y. T. Tian25, I. Uman53b, B. Wang1, C. W. Wang35, D. Y. Wang38,h, H. J. Wang31,k,l, H. P. Wang1,54, K. Wang1,49, L. L. Wang1, M. Wang41, M. Z. Wang38,h, Meng Wang1,54, S. Wang9,f, W. Wang50, W. H. Wang68, W. P. Wang63,49, X. Wang38,h, X. F. Wang31,k,l, X. L. Wang9,f, Y. Wang50, Y. Wang63,49, Y. D. Wang37, Y. F. Wang1,49,54, Y. Q. Wang1, Y. Y. Wang31,k,l, Z. Wang1,49, Z. Y. Wang1, Ziyi Wang54, Zongyuan Wang1,54, D. H. Wei12, F. Weidner60, S. P. Wen1, D. J. White58, U. Wiedner4, G. Wilkinson61, M. Wolke67, L. Wollenberg4, J. F. Wu1,54, L. H. Wu1, L. J. Wu1,54, X. Wu9,f, Z. Wu1,49, L. Xia63,49, H. Xiao9,f, S. Y. Xiao1, Z. J. Xiao34, X. H. Xie38,h, Y. G. Xie1,49, Y. H. Xie6, T. Y. Xing1,54, C. J. Xu50, G. F. Xu1, Q. J. Xu14, W. Xu1,54, X. P. Xu46, Y. C. Xu54, F. Yan9,f, L. Yan9,f, W. B. Yan63,49, W. C. Yan71, Xu Yan46, H. J. Yang42,e, H. X. Yang1, L. Yang43, S. L. Yang54, Y. X. Yang12, Yifan Yang1,54, Zhi Yang25, M. Ye1,49, M. H. Ye7, J. H. Yin1, Z. Y. You50, B. X. Yu1,49,54, C. X. Yu36, G. Yu1,54, J. S. Yu20,i, T. Yu64, C. Z. Yuan1,54, L. Yuan2, X. Q. Yuan38,h, Y. Yuan1, Z. Y. Yuan50, C. X. Yue32, A. A. Zafar65, X. Zeng Zeng 6, Y. Zeng20,i, A. Q. Zhang1, B. X. Zhang1, Guangyi Zhang16, H. Zhang63, H. H. Zhang50, H. H. Zhang27, H. Y. Zhang1,49, J. L. Zhang69, J. Q. Zhang34, J. W. Zhang1,49,54, J. Y. Zhang1, J. Z. Zhang1,54, Jianyu Zhang1,54, Jiawei Zhang1,54, L. M. Zhang52, L. Q. Zhang50, Lei Zhang35, S. Zhang50, S. F. Zhang35, Shulei Zhang20,i, X. D. Zhang37, X. Y. Zhang41, Y. Zhang61, Y. T. Zhang71, Y. H. Zhang1,49, Yan Zhang63,49, Yao Zhang1, Z. Y. Zhang68, G. Zhao1, J. Zhao32, J. Y. Zhao1,54, J. Z. Zhao1,49, Lei Zhao63,49, Ling Zhao1, M. G. Zhao36, Q. Zhao1, S. J. Zhao71, Y. B. Zhao1,49, Y. X. Zhao25, Z. G. Zhao63,49, A. Zhemchugov29,a, B. Zheng64, J. P. Zheng1,49, Y. H. Zheng54, B. Zhong34, C. Zhong64, L. P. Zhou1,54, Q. Zhou1,54, X. Zhou68, X. K. Zhou54, X. R. Zhou63,49, X. Y. Zhou32, A. N. Zhu1,54, J. Zhu36, K. Zhu1, K. J. Zhu1,49,54, S. H. Zhu62, T. J. Zhu69, W. J. Zhu36, W. J. Zhu9,f, Y. C. Zhu63,49, Z. A. Zhu1,54, B. S. Zou1, and J. H. Zou1 (BESIII Collaboration)

  • 1Institute of High Energy Physics, Beijing 100049, People’s Republic of China
  • 2Beihang University, Beijing 100191, People’s Republic of China
  • 3Beijing Institute of Petrochemical Technology, Beijing 102617, People’s Republic of China
  • 4Bochum Ruhr-University, D-44780 Bochum, Germany
  • 5Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
  • 6Central China Normal University, Wuhan 430079, People’s Republic of China
  • 7China Center of Advanced Science and Technology, Beijing 100190, People’s Republic of China
  • 8COMSATS University Islamabad, Lahore Campus, Defence Road, Off Raiwind Road, 54000 Lahore, Pakistan
  • 9Fudan University, Shanghai 200443, People’s Republic of China
  • 10G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
  • 11GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
  • 12Guangxi Normal University, Guilin 541004, People’s Republic of China
  • 13Guangxi University, Nanning 530004, People’s Republic of China
  • 14Hangzhou Normal University, Hangzhou 310036, People’s Republic of China
  • 15Helmholtz Institute Mainz, Staudinger Weg 18, D-55099 Mainz, Germany
  • 16Henan Normal University, Xinxiang 453007, People’s Republic of China
  • 17Henan University of Science and Technology, Luoyang 471003, People’s Republic of China
  • 18Huangshan College, Huangshan 245000, People’s Republic of China
  • 19Hunan Normal University, Changsha 410081, People’s Republic of China
  • 20Hunan University, Changsha 410082, People’s Republic of China
  • 21Indian Institute of Technology Madras, Chennai 600036, India
  • 22Indiana University, Bloomington, Indiana 47405, USA
  • 23aINFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
  • 23bINFN Sezione di Perugia, I-06100, Perugia, Italy
  • 23cUniversity of Perugia, I-06100, Perugia, Italy
  • 24aINFN Sezione di Ferrara, I-44122, Ferrara, Italy
  • 24bUniversity of Ferrara, I-44122, Ferrara, Italy
  • 25Institute of Modern Physics, Lanzhou 730000, People’s Republic of China
  • 26Institute of Physics and Technology, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia
  • 27Jilin University, Changchun 130012, People’s Republic of China
  • 28Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
  • 29Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
  • 30Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany
  • 31Lanzhou University, Lanzhou 730000, People’s Republic of China
  • 32Liaoning Normal University, Dalian 116029, People’s Republic of China
  • 33Liaoning University, Shenyang 110036, People’s Republic of China
  • 34Nanjing Normal University, Nanjing 210023, People’s Republic of China
  • 35Nanjing University, Nanjing 210093, People’s Republic of China
  • 36Nankai University, Tianjin 300071, People’s Republic of China
  • 37North China Electric Power University, Beijing 102206, People’s Republic of China
  • 38Peking University, Beijing 100871, People’s Republic of China
  • 39Qufu Normal University, Qufu 273165, People’s Republic of China
  • 40Shandong Normal University, Jinan 250014, People’s Republic of China
  • 41Shandong University, Jinan 250100, People’s Republic of China
  • 42Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
  • 43Shanxi Normal University, Linfen 041004, People’s Republic of China
  • 44Shanxi University, Taiyuan 030006, People’s Republic of China
  • 45Sichuan University, Chengdu 610064, People’s Republic of China
  • 46Soochow University, Suzhou 215006, People’s Republic of China
  • 47South China Normal University, Guangzhou 510006, People’s Republic of China
  • 48Southeast University, Nanjing 211100, People’s Republic of China
  • 49State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People’s Republic of China
  • 50Sun Yat-Sen University, Guangzhou 510275, People’s Republic of China
  • 51Suranaree University of Technology, University Avenue 111, Nakhon Ratchasima 30000, Thailand
  • 52Tsinghua University, Beijing 100084, People’s Republic of China
  • 53aTurkish Accelerator Center Particle Factory Group, Istinye University, 34010, Istanbul, Turkey
  • 53bNear East University, Nicosia, North Cyprus, Mersin 10, Turkey
  • 54University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
  • 55University of Groningen, NL-9747 AA Groningen, The Netherlands
  • 56University of Hawaii, Honolulu, Hawaii 96822, USA
  • 57University of Jinan, Jinan 250022, People’s Republic of China
  • 58University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
  • 59University of Minnesota, Minneapolis, Minnesota 55455, USA
  • 60University of Muenster, Wilhelm-Klemm-Straße 9, 48149 Muenster, Germany
  • 61University of Oxford, Keble Road, Oxford, United Kingdom OX13RH
  • 62University of Science and Technology Liaoning, Anshan 114051, People’s Republic of China
  • 63University of Science and Technology of China, Hefei 230026, People’s Republic of China
  • 64University of South China, Hengyang 421001, People’s Republic of China
  • 65University of the Punjab, Lahore-54590, Pakistan
  • 66aUniversity of Turin, I-10125, Turin, Italy
  • 66bUniversity of Eastern Piedmont, I-15121, Alessandria, Italy
  • 66cINFN, I-10125, Turin, Italy
  • 67Uppsala University, Box 516, SE-75120 Uppsala, Sweden
  • 68Wuhan University, Wuhan 430072, People’s Republic of China
  • 69Xinyang Normal University, Xinyang 464000, People’s Republic of China
  • 70Zhejiang University, Hangzhou 310027, People’s Republic of China
  • 71Zhengzhou University, Zhengzhou 450001, People’s Republic of China

  • aAlso at the Moscow Institute of Physics and Technology, Moscow 141700, Russia.
  • bAlso at the Novosibirsk State University, Novosibirsk, 630090, Russia.
  • cAlso at the NRC “Kurchatov Institute,” PNPI, 188300, Gatchina, Russia.
  • dAlso at Goethe University Frankfurt, 60323 Frankfurt am Main, Germany.
  • eAlso at Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education; Shanghai Key Laboratory for Particle Physics and Cosmology; Institute of Nuclear and Particle Physics, Shanghai 200240, People’s Republic of China.
  • fAlso at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443, People’s Republic of China.
  • gAlso at Harvard University, Department of Physics, Cambridge, Massachusetts 02138, USA.
  • hAlso at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People’s Republic of China.
  • iAlso at School of Physics and Electronics, Hunan University, Changsha 410082, China.
  • jAlso at Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou 510006, China.
  • kAlso at Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, People’s Republic of China.
  • lAlso at Lanzhou Center for Theoretical Physics, Lanzhou University, Lanzhou 730000, People’s Republic of China.
PDF

Phys. Rev. D 104, L091104 – Published 29 November, 2021

DOI: https://doi.org/10.1103/PhysRevD.104.L091104

Abstract

The Born cross section of the process e+e−→ΛΛ¯ is measured at 33 center-of-mass energies between 3.51 and 4.60 GeV using data corresponding to the total integrated luminosity of 20.0  fb−1 collected with the BESIII detector at the BEPCII collider. Describing the energy dependence of the cross section requires a contribution from the ψ(3770)→ΛΛ¯ decay, which is fitted with a significance of 4.6−4.9σ including the systematic uncertainty. The lower bound on its branching fraction is 2.4×10−6 at the 90% confidence level (C.L.), at least an order of magnitude larger than expected from predictions using a scaling based on observed electronic widths. This result indicates the importance of effects from vector charmonium(like) states when interpreting data in terms of e.g., electromagnetic structure observables. The data do not allow for definite conclusions on the interplay with other vector charmonium(like) states, and we set 90% C.L. upper limits for the products of their electronic widths and the branching fractions.

View figure in article

Physics Subject Headings (PhySH)

Article Text

Supplemental Material

References (65)

  1. N. Brambilla et al., Eur. Phys. J. C 71, 1534 (2011).
  2. R. A. Briceno et al., Chin. Phys. C 40, 042001 (2016).
  3. E. Eichten, K. Gottfried, T. Kinoshita, K. D. Lane, and T. M. Yan, Phys. Rev. D 17, 3090 (1978).
  4. F. E. Close and P. R. Page, Phys. Lett. B 628, 215 (2005).
  5. J. Z. Bai et al. (BES Collaboration), Phys. Lett. B 605, 63 (2005).
  6. N. E. Adam et al. (CLEO Collaboration), Phys. Rev. Lett. 96, 082004 (2006).
  7. R. A. Briere et al. (CLEO Collaboration), Phys. Rev. D 74, 031106(R) (2006).
  8. T. E. Coan et al. (CLEO Collaboration), Phys. Rev. Lett. 96, 182002 (2006).
  9. G. S. Adams et al. (CLEO Collaboration), Phys. Rev. D 73, 012002 (2006).
  10. M. Ablikim et al. (BESIII Collaboration), Phys. Lett. B 735, 101 (2014).
  11. B. D. Wan, S. Q. Zhang, and C. F. Qiao, arXiv:2109.07130.
  12. X. Cao and J. P. Dai, arXiv:2109.15132.
  13. L. G. Xia, Phys. Lett. B 756, 77 (2016).
  14. P. A. Zyla et al. (Particle Data Group), Prog. Theor. Exp. Phys. 2020, 083C01 (2020).
  15. X. F. Wang, EPJ Web Conf. 202, 02002 (2019).
  16. B. Aubert et al. (BABAR Collaboration), Phys. Rev. Lett. 95, 142001 (2005).
  17. B. Aubert et al. (BABAR Collaboration), Phys. Rev. Lett. 98, 212001 (2007).
  18. J. P. Lees et al. (BABAR Collaboration), Phys. Rev. D 89, 111103 (2014).
  19. J. P. Lees et al. (BABAR Collaboration), Phys. Rev. D 86, 051102(R) (2012).
  20. C. Z. Yuan et al. (Belle Collaboration), Phys. Rev. Lett. 99, 182004 (2007).
  21. X. L. Wang et al. (Belle Collaboration), Phys. Rev. Lett. 99, 142002 (2007).
  22. X. L. Wang et al. (Belle Collaboration), Phys. Rev. D 91, 112007 (2015).
  23. G. Pakhlova et al. (Belle Collaboration), Phys. Rev. Lett. 101, 172001 (2008).
  24. Z. Q. Liu et al. (Belle Collaboration), Phys. Rev. Lett. 110, 252002 (2013).
  25. T. E. Coan et al. (CLEO Collaboration), Phys. Rev. Lett. 96, 162003 (2006).
  26. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. Lett. 114, 092003 (2015).
  27. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. Lett. 118, 092001 (2017).
  28. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 97, 052001 (2018).
  29. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 101, 012008 (2020).
  30. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 102, 012009 (2020).
  31. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 104, 052012 (2021).
  32. H. X. Chen, W. Chen, X. Liu, and S. L. Zhu, Phys. Rep. 639, 1 (2016).
  33. S. Dobbs, A. Tomaradze, T. Xiao, K. K. Seth, and G. Bonvicini, Phys. Lett. B 739, 90 (2014).
  34. S. Dobbs, K. K. Seth, A. Tomaradze, T. Xiao, and G. Bonvicini, Phys. Rev. D 96, 092004 (2017).
  35. See Supplemental Material http://link.aps.org/supplemental/10.1103/PhysRevD.104.L091104 for a summary of number of signal events, luminosity, detection efficiency, ISR factor, vacuum polarization factor, the Born cross section, the EFF, significance at each energy point, which includes Refs. [37,38].
  36. M. Ablikim et al. (BESIII Collaboration), Chin. Phys. C 39, 093001 (2015).
  37. M. Ablikim et al. (BESIII Collaboration), Chin. Phys. C 40, 063001 (2016).
  38. Y. F. Wang, Int. J. Mod. Phys. A 21, 5371 (2006).
  39. M. Ablikim et al. (BESIII Collaboration), Chin. Phys. C 44, 040001 (2020).
  40. M. Ablikim et al. (BESIII Collaboration), Nucl. Instrum. Methods Phys. Res., Sect. A 614, 345 (2010).
  41. S. Jadach, B. F. L. Ward, and Z. Was, Comput. Phys. Commun. 130, 260 (2000).
  42. S. Jadach, B. F. L. Ward, and Z. Was, Phys. Rev. D 63, 113009 (2001).
  43. R. G. Ping, Chin. Phys. C 32, 599 (2008); D. J. Lange, Nucl. Instrum. Methods Phys. Res., Sect. A 462, 152 (2001).
  44. S. Agostinelli et al. (GEANT4 Collaboration), Nucl. Instrum. Methods Phys. Res., Sect. A 506, 250 (2003).
  45. J. Allison et al., IEEE Trans. Nucl. Sci. 53, 270 (2006).
  46. D. M. Asner, T. Barnes, J. M. Bian, I. I. Bigi, N. Brambilla, I. R. Boyko, V. Bytev, K. T. Chao, J. Charles, H. X. Chen et al. Int. J. Mod. Phys. A 24, S1 (2009), https://inspirehep.net/literature/796263.
  47. M. Xu et al., Chin. Phys. C 33, 428 (2009).
  48. J. Lundberg, J. Conrad, W. Rolke, and A. Lopez, Comput. Phys. Commun. 181, 683 (2010).
  49. R. G. Ping, Chin. Phys. C 38, 083001 (2014).
  50. E. Kuraev and V. S. Fadin, Sov. J. Nucl. Phys. 41, 466 (1985), https://inspirehep.net/literature/217313.
  51. S. Actis et al. Eur. Phys. J. C 66, 585 (2010).
  52. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 87, 032007 (2013).
  53. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 93, 072003 (2016).
  54. M. Ablikim et al. (BESIII Collaboration), Phys. Lett. B 770, 217 (2017).
  55. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 100, 051101 (2019).
  56. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. D 103, 012005 (2021).
  57. M. Ablikim et al. (BESIII Collaboration), Phys. Lett. B 820, 136557 (2021).
  58. M. Ablikim et al. (BESIII Collaboration), arXiv:2109.06621.
  59. G. Fäldt and A. Kupsc, Phys. Lett. B 772, 16 (2017).
  60. M. Ablikim et al. (BESIII Collaboration), Nat. Phys. 15, 631 (2019).
  61. M. Ablikim et al. (BESIII Collaboration), Phys. Rev. Lett. 124, 032002 (2020).
  62. G. P. Lepage and S. J. Brodsky, Phys. Rev. D 22, 2157 (1980).
  63. S. Pacetti, R. Baldini Ferroli, and E. Tomasi-Gustafsson, Phys. Rep. 550–551, 1 (2015).
  64. K. Zhu, X. H. Mo, C. Z. Yuan, and P. Wang, Int. J. Mod. Phys. A 26, 4511 (2011).
  65. Y. Bai and D. Y. Chen, Phys. Rev. D 99, 072007 (2019).

Outline

Information

Phys. Rev. D 104, L091104– Published 29 November, 2021
  • Received 5 August 2021
  • Accepted 26 October 2021
Crossmark - Check for updates button
Creative Commons Logo

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation