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Cross section measurement of $e^{+} e^{-} \to K_{S}^{0} K_{L}^{0}$ at $\sqrt{s} = 2.00 - 3.08 GeV$

M. Ablikim¹, M. N. Achasov^10,c, P. Adlarson⁶⁴, S. Ahmed¹⁵, M. Albrecht⁴, A. Amoroso^63a,63c, Q. An^60,48, Anita²¹, X. H. Bai⁵⁴ et al. (BESIII Collaboration)

X. H. Bai⁵⁴, Y. Bai⁴⁷, O. Bakina²⁹, R. Baldini Ferroli^23a, I. Balossino^24a, Y. Ban^38,k, K. Begzsuren²⁶, J. V. Bennett⁵, N. Berger²⁸, M. Bertani^23a, D. Bettoni^24a, F. Bianchi^63a,63c, J. Biernat⁶⁴, J. Bloms⁵⁷, A. Bortone^63a,63c, I. Boyko²⁹, R. A. Briere⁵, H. Cai⁶⁵, X. Cai^1,48, A. Calcaterra^23a, G. F. Cao^1,52, N. Cao^1,52, S. A. Cetin^51b, J. F. Chang^1,48, W. L. Chang^1,52, G. Chelkov^29,b, D. Y. Chen⁶, G. Chen¹, H. S. Chen^1,52, M. L. Chen^1,48, S. J. Chen³⁶, X. R. Chen²⁵, Y. B. Chen^1,48, Z. J. Chen^20,l, W. S. Cheng^63c, G. Cibinetto^24a, F. Cossio^63c, X. F. Cui³⁷, H. L. Dai^1,48, J. P. Dai^42,g, X. C. Dai^1,52, A. Dbeyssi¹⁵, R. B. de Boer⁴, D. Dedovich²⁹, Z. Y. Deng¹, A. Denig²⁸, I. Denysenko²⁹, M. Destefanis^63a,63c, F. De Mori^63a,63c, Y. Ding³⁴, C. Dong³⁷, J. Dong^1,48, L. Y. Dong^1,52, M. Y. Dong^1,48,52, S. X. Du⁶⁸, J. Fang^1,48, S. S. Fang^1,52, Y. Fang¹, R. Farinelli^24a, L. Fava^63b,63c, F. Feldbauer⁴, G. Felici^23a, C. Q. Feng^60,48, M. Fritsch⁴, C. D. Fu¹, Y. Fu¹, X. L. Gao^60,48, Y. Gao^38,k, Y. Gao⁶¹, Y. G. Gao⁶, I. Garzia^24a,24b, E. M. Gersabeck⁵⁵, A. Gilman⁵⁶, K. Goetzen¹¹, L. Gong³⁷, W. X. Gong^1,48, W. Gradl²⁸, M. Greco^63a,63c, L. M. Gu³⁶, M. H. Gu^1,48, S. Gu², Y. T. Gu¹³, C. Y. Guan^1,52, A. Q. Guo²², L. B. Guo³⁵, R. P. Guo⁴⁰, Y. P. Guo^9,h, Y. P. Guo²⁸, A. Guskov²⁹, S. Han⁶⁵, T. T. Han⁴¹, T. Z. Han^9,h, X. Q. Hao¹⁶, F. A. Harris⁵³, K. L. He^1,52, F. H. Heinsius⁴, T. Held⁴, Y. K. Heng^1,48,52, M. Himmelreich^11,f, T. Holtmann⁴, Y. R. Hou⁵², Z. L. Hou¹, H. M. Hu^1,52, J. F. Hu^42,g, T. Hu^1,48,52, Y. Hu¹, G. S. Huang^60,48, L. Q. Huang⁶¹, X. T. Huang⁴¹, Y. P. Huang¹, Z. Huang^38,k, N. Huesken⁵⁷, T. Hussain⁶², W. Ikegami Andersson⁶⁴, W. Imoehl²², M. Irshad^60,48, S. Jaeger⁴, S. Janchiv^26,j, Q. Ji¹, Q. P. Ji¹⁶, X. B. Ji^1,52, X. L. Ji^1,48, H. B. Jiang⁴¹, X. S. Jiang^1,48,52, X. Y. Jiang³⁷, J. B. Jiao⁴¹, Z. Jiao¹⁸, S. Jin³⁶, Y. Jin⁵⁴, T. Johansson⁶⁴, N. Kalantar-Nayestanaki³¹, X. S. Kang³⁴, R. Kappert³¹, M. Kavatsyuk³¹, B. C. Ke^43,1, I. K. Keshk⁴, A. Khoukaz⁵⁷, P. Kiese²⁸, R. Kiuchi¹, R. Kliemt¹¹, L. Koch³⁰, O. B. Kolcu^51b,e, B. Kopf⁴, M. Kuemmel⁴, M. Kuessner⁴, A. Kupsc⁶⁴, M. G. Kurth^1,52, W. Kühn³⁰, J. J. Lane⁵⁵, J. S. Lange³⁰, P. Larin¹⁵, L. Lavezzi^63c, H. Leithoff²⁸, M. Lellmann²⁸, T. Lenz²⁸, C. Li³⁹, C. H. Li³³, Cheng Li^60,48, D. M. Li⁶⁸, F. Li^1,48, G. Li¹, H. B. Li^1,52, H. J. Li^9,h, J. L. Li⁴¹, J. Q. Li⁴, Ke Li¹, L. K. Li¹, Lei Li³, P. L. Li^60,48, P. R. Li³², S. Y. Li⁵⁰, W. D. Li^1,52, W. G. Li¹, X. H. Li^60,48, X. L. Li⁴¹, Z. B. Li⁴⁹, Z. Y. Li⁴⁹, H. Liang^1,52, H. Liang^60,48, Y. F. Liang⁴⁵, Y. T. Liang²⁵, L. Z. Liao^1,52, J. Libby²¹, C. X. Lin⁴⁹, B. Liu^42,g, B. J. Liu¹, C. X. Liu¹, D. Liu^60,48, D. Y. Liu^42,g, F. H. Liu⁴⁴, Fang Liu¹, Feng Liu⁶, H. B. Liu¹³, H. M. Liu^1,52, Huanhuan Liu¹, Huihui Liu¹⁷, J. B. Liu^60,48, J. Y. Liu^1,52, K. Liu¹, K. Y. Liu³⁴, Ke Liu⁶, L. Liu^60,48, Q. Liu⁵², S. B. Liu^60,48, Shuai Liu⁴⁶, T. Liu^1,52, X. Liu³², Y. B. Liu³⁷, Z. A. Liu^1,48,52, Z. Q. Liu⁴¹, Y. F. Long^38,k, X. C. Lou^1,48,52, F. X. Lu¹⁶, H. J. Lu¹⁸, J. D. Lu^1,52, J. G. Lu^1,48, X. L. Lu¹, Y. Lu¹, Y. P. Lu^1,48, C. L. Luo³⁵, M. X. Luo⁶⁷, P. W. Luo⁴⁹, T. Luo^9,h, X. L. Luo^1,48, S. Lusso^63c, X. R. Lyu⁵², F. C. Ma³⁴, H. L. Ma¹, L. L. Ma⁴¹, M. M. Ma^1,52, Q. M. Ma¹, R. Q. Ma^1,52, R. T. Ma⁵², X. N. Ma³⁷, X. X. Ma^1,52, X. Y. Ma^1,48, Y. M. Ma⁴¹, F. E. Maas¹⁵, M. Maggiora^63a,63c, S. Maldaner²⁸, S. Malde⁵⁸, Q. A. Malik⁶², A. Mangoni^23b, Y. J. Mao^38,k, Z. P. Mao¹, S. Marcello^63a,63c, Z. X. Meng⁵⁴, J. G. Messchendorp³¹, G. Mezzadri^24a, T. J. Min³⁶, R. E. Mitchell²², X. H. Mo^1,48,52, Y. J. Mo⁶, N. Yu. Muchnoi^10,c, H. Muramatsu⁵⁶, S. Nakhoul^11,f, Y. Nefedov²⁹, F. Nerling^11,f, I. B. Nikolaev^10,c, Z. Ning^1,48, S. Nisar^8,i, S. L. Olsen⁵², Q. Ouyang^1,48,52, S. Pacetti^23b,23c, X. Pan⁴⁶, Y. Pan⁵⁵, A. Pathak¹, P. Patteri^23a, M. Pelizaeus⁴, H. P. Peng^60,48, K. Peters^11,f, J. Pettersson⁶⁴, J. L. Ping³⁵, R. G. Ping^1,52, A. Pitka⁴, R. Poling⁵⁶, V. Prasad^60,48, H. Qi^60,48, H. R. Qi⁵⁰, M. Qi³⁶, T. Y. Qi², S. Qian^1,48, W.-B. Qian⁵², Z. Qian⁴⁹, C. F. Qiao⁵², L. Q. Qin¹², X. S. Qin⁴, Z. H. Qin^1,48, J. F. Qiu¹, S. Q. Qu³⁷, K. H. Rashid⁶², K. Ravindran²¹, C. F. Redmer²⁸, A. Rivetti^63c, V. Rodin³¹, M. Rolo^63c, G. Rong^1,52, Ch. Rosner¹⁵, M. Rump⁵⁷, A. Sarantsev^29,d, Y. Schelhaas²⁸, C. Schnier⁴, K. Schoenning⁶⁴, D. C. Shan⁴⁶, W. Shan¹⁹, X. Y. Shan^60,48, M. Shao^60,48, C. P. Shen^2,9, P. X. Shen³⁷, X. Y. Shen^1,52, H. C. Shi^60,48, R. S. Shi^1,52, X. Shi^1,48, X. D. Shi^60,48, J. J. Song⁴¹, Q. Q. Song^60,48, W. M. Song²⁷, Y. X. Song^38,k, S. Sosio^63a,63c, S. Spataro^63a,63c, F. F. Sui⁴¹, G. X. Sun¹, J. F. Sun¹⁶, L. Sun⁶⁵, S. S. Sun^1,52, T. Sun^1,52, W. Y. Sun³⁵, X. Sun^20,l, Y. J. Sun^60,48, Y. K. Sun^60,48, Y. Z. Sun¹, Z. T. Sun¹, Y. H. Tan⁶⁵, Y. X. Tan^60,48, C. J. Tang⁴⁵, G. Y. Tang¹, J. Tang⁴⁹, V. Thoren⁶⁴, B. Tsednee²⁶, I. Uman^51d, B. Wang¹, B. L. Wang⁵², C. W. Wang³⁶, D. Y. Wang^38,k, H. P. Wang^1,52, K. Wang^1,48, L. L. Wang¹, M. Wang⁴¹, M. Z. Wang^38,k, Meng Wang^1,52, W. H. Wang⁶⁵, W. P. Wang^60,48, X. Wang^38,k, X. F. Wang³², X. L. Wang^9,h, Y. Wang^60,48, Y. Wang⁴⁹, Y. D. Wang¹⁵, Y. F. Wang^1,48,52, Y. Q. Wang¹, Z. Wang^1,48, Z. Y. Wang¹, Ziyi Wang⁵², Zongyuan Wang^1,52, D. H. Wei¹², P. Weidenkaff²⁸, F. Weidner⁵⁷, S. P. Wen¹, D. J. White⁵⁵, U. Wiedner⁴, G. Wilkinson⁵⁸, M. Wolke⁶⁴, L. Wollenberg⁴, J. F. Wu^1,52, L. H. Wu¹, L. J. Wu^1,52, X. Wu^9,h, Z. Wu^1,48, L. Xia^60,48, H. Xiao^9,h, S. Y. Xiao¹, Y. J. Xiao^1,52, Z. J. Xiao³⁵, X. H. Xie^38,k, Y. G. Xie^1,48, Y. H. Xie⁶, T. Y. Xing^1,52, X. A. Xiong^1,52, G. F. Xu¹, J. J. Xu³⁶, Q. J. Xu¹⁴, W. Xu^1,52, X. P. Xu⁴⁶, L. Yan^63a,63c, L. Yan^9,h, W. B. Yan^60,48, W. C. Yan⁶⁸, Xu Yan⁴⁶, H. J. Yang^42,g, H. X. Yang¹, L. Yang⁶⁵, R. X. Yang^60,48, S. L. Yang^1,52, Y. H. Yang³⁶, Y. X. Yang¹², Yifan Yang^1,52, Zhi Yang²⁵, M. Ye^1,48, M. H. Ye⁷, J. H. Yin¹, Z. Y. You⁴⁹, B. X. Yu^1,48,52, C. X. Yu³⁷, G. Yu^1,52, J. S. Yu^20,l, T. Yu⁶¹, C. Z. Yuan^1,52, W. Yuan^63a,63c, X. Q. Yuan^38,k, Y. Yuan¹, Z. Y. Yuan⁴⁹, C. X. Yue³³, A. Yuncu^51b,a, A. A. Zafar⁶², Y. Zeng^20,l, B. X. Zhang¹, Guangyi Zhang¹⁶, H. H. Zhang⁴⁹, H. Y. Zhang^1,48, J. L. Zhang⁶⁶, J. Q. Zhang⁴, J. W. Zhang^1,48,52, J. Y. Zhang¹, J. Z. Zhang^1,52, Jianyu Zhang^1,52, Jiawei Zhang^1,52, L. Zhang¹, Lei Zhang³⁶, S. Zhang⁴⁹, S. F. Zhang³⁶, T. J. Zhang^42,g, X. Y. Zhang⁴¹, Y. Zhang⁵⁸, Y. H. Zhang^1,48, Y. T. Zhang^60,48, Yan Zhang^60,48, Yao Zhang¹, Yi Zhang^9,h, Z. H. Zhang⁶, Z. Y. Zhang⁶⁵, G. Zhao¹, J. Zhao³³, J. Y. Zhao^1,52, J. Z. Zhao^1,48, Lei Zhao^60,48, Ling Zhao¹, M. G. Zhao³⁷, Q. Zhao¹, S. J. Zhao⁶⁸, Y. B. Zhao^1,48, Y. X. Zhao²⁵, Z. G. Zhao^60,48, A. Zhemchugov^29,b, B. Zheng⁶¹, J. P. Zheng^1,48, Y. Zheng^38,k, Y. H. Zheng⁵², B. Zhong³⁵, C. Zhong⁶¹, L. P. Zhou^1,52, Q. Zhou^1,52, X. Zhou⁶⁵, X. K. Zhou⁵², X. R. Zhou^60,48, A. N. Zhu^1,52, J. Zhu³⁷, K. Zhu¹, K. J. Zhu^1,48,52, S. H. Zhu⁵⁹, W. J. Zhu³⁷, X. L. Zhu⁵⁰, Y. C. Zhu^60,48, Z. A. Zhu^1,52, 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, Johann-Joachim-Becher-Weg 45, 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
³¹KVI-CART, University of Groningen, NL-9747 AA Groningen, The Netherlands
³²Lanzhou University, Lanzhou 730000, People’s Republic of China
³³Liaoning Normal University, Dalian 116029, People’s Republic of China
³⁴Liaoning University, Shenyang 110036, People’s Republic of China
³⁵Nanjing Normal University, Nanjing 210023, People’s Republic of China
³⁶Nanjing University, Nanjing 210093, People’s Republic of China
³⁷Nankai University, Tianjin 300071, 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
⁴⁷Southeast University, Nanjing 211100, People’s Republic of China
⁴⁸State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People’s Republic of China
⁴⁹Sun Yat-Sen University, Guangzhou 510275, People’s Republic of China
⁵⁰Tsinghua University, Beijing 100084, People’s Republic of China
^51aAnkara University, 06100 Tandogan, Ankara, Turkey
^51bIstanbul Bilgi University, 34060 Eyup, Istanbul, Turkey
^51cUludag University, 16059 Bursa, Turkey
^51dNear East University, 99138 Nicosia, North Cyprus, Mersin 10, Turkey
⁵²University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
⁵³University of Hawaii, Honolulu, Hawaii 96822, USA
⁵⁴University of Jinan, Jinan 250022, People’s Republic of China
⁵⁵University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
⁵⁶University of Minnesota, Minneapolis, Minnesota 55455, USA
⁵⁷University of Muenster, Wilhelm-Klemm-Straße 9, 48149 Muenster, Germany
⁵⁸University of Oxford, Keble Rd, Oxford OX13RH, United Kingdom
⁵⁹University of Science and Technology Liaoning, Anshan 114051, People’s Republic of China
⁶⁰University of Science and Technology of China, Hefei 230026, People’s Republic of China
⁶¹University of South China, Hengyang 421001, People’s Republic of China
⁶²University of the Punjab, Lahore-54590, Pakistan
^63aUniversity of Turin, I-10125 Turin, Italy;
^63bUniversity of Eastern Piedmont, I-15121 Alessandria, Italy
^63cINFN, I-10125 Turin, Italy
⁶⁴Uppsala University, Box 516, SE-75120 Uppsala, Sweden
⁶⁵Wuhan University, Wuhan 430072, People’s Republic of China
⁶⁶Xinyang Normal University, Xinyang 464000, People’s Republic of China
⁶⁷Zhejiang University, Hangzhou 310027, People’s Republic of China
⁶⁸Zhengzhou University, Zhengzhou 450001, People’s Republic of China

^aAlso at Bogazici University, 34342 Istanbul, Turkey.
^bAlso at the Moscow Institute of Physics and Technology, Moscow 141700, Russia.
^cAlso at the Novosibirsk State University, Novosibirsk 630090, Russia.
^dAlso at the NRC “Kurchatov Institute”, PNPI, 188300 Gatchina, Russia.
^eAlso at Istanbul Arel University, 34295 Istanbul, Turkey.
^fAlso at Goethe University Frankfurt, 60323 Frankfurt am Main, Germany.
^gAlso 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.
^hAlso 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.
ⁱAlso at Harvard University, Department of Physics, Cambridge, Massachusetts 02138, USA.
^jPresent address: Institute of Physics and Technology, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia.
^kAlso at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People’s Republic of China.
^lSchool of Physics and Electronics, Hunan University, Changsha 410082, China.

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Phys. Rev. D 104, 092014 – Published 29 November, 2021

DOI: https://doi.org/10.1103/PhysRevD.104.092014

Abstract

The cross sections of the process $e^{+} e^{-} \to K_{S}^{0} K_{L}^{0}$ are measured at fifteen center-of-mass energies $\sqrt{s}$ from 2.00 to 3.08 GeV with a total integrated luminosity of $582 {pb}^{- 1}$ and using the BESIII detector at the Beijing Electron Positron Collider. The results are found to be consistent with those obtained by BABAR. A resonant structure around 2.2 GeV is observed, with a mass and width of $2273.7 \pm 5.7 \pm 19.3 MeV / c^{2}$ and $86 \pm 44 \pm 51 MeV$ , respectively, where the first uncertainties are statistical and the second ones are systematic. The product of its radiative width ( $Γ_{e^{+} e^{-}}$ ) with its branching fraction to $K_{S}^{0} K_{L}^{0}$ ( $B r_{K_{S}^{0} K_{L}^{0}}$ ) is $0.9 \pm 0.6 \pm 0.7 eV$ .

Physics Subject Headings (PhySH)

Article Text

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Phys. Rev. D 104, 092014– Published 29 November, 2021

Vol. 104, Iss. 9 — 1 November 2021

Received 31 May 2021
Accepted 15 October 2021

DOI: https://doi.org/10.1103/PhysRevD.104.092014

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.

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Cross section measurement of $e^{+} e^{-} \to K_{S}^{0} K_{L}^{0}$ at $\sqrt{s} = 2.00 - 3.08 GeV$

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Cross section measurement of e+e−→KS0KL0 at s=2.00−3.08 GeV

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Cross section measurement of $e^{+} e^{-} \to K_{S}^{0} K_{L}^{0}$ at $\sqrt{s} = 2.00 - 3.08 GeV$