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Evidence for $f_{0} (980) f_{0} (980)$ production in $χ_{c 0}$ decays

M. Ablikim¹, J. Z. Bai¹, Y. Ban¹⁰, J. G. Bian¹, X. Cai¹, J. F. Chang¹, H. F. Chen¹⁶, H. S. Chen¹, H. X. Chen¹ et al. (BES Collaboration)

H. X. Chen¹, J. C. Chen¹, Jin Chen¹, Jun Chen⁶, M. L. Chen¹, Y. B. Chen¹, S. P. Chi², Y. P. Chu¹, X. Z. Cui¹, H. L. Dai¹, Y. S. Dai¹⁸, Z. Y. Deng¹, L. Y. Dong¹, S. X. Du¹, Z. Z. Du¹, J. Fang¹, S. S. Fang², C. D. Fu¹, H. Y. Fu¹, C. S. Gao¹, Y. N. Gao¹⁴, M. Y. Gong¹, W. X. Gong¹, S. D. Gu¹, Y. N. Guo¹, Y. Q. Guo¹, Z. J. Guo¹⁵, F. A. Harris¹⁵, K. L. He¹, M. He¹¹, X. He¹, Y. K. Heng¹, H. M. Hu¹, T. Hu¹, G. S. Huang^1,*, L. Huang⁶, X. P. Huang¹, X. B. Ji¹, Q. Y. Jia¹⁰, C. H. Jiang¹, X. S. Jiang¹, D. P. Jin¹, S. Jin¹, Y. Jin¹, Y. F. Lai¹, F. Li¹, G. Li¹, H. H. Li¹, J. Li¹, J. C. Li¹, Q. J. Li¹, R. B. Li¹, R. Y. Li¹, S. M. Li¹, W. G. Li¹, X. L. Li⁷, X. Q. Li⁹, X. S. Li¹⁴, Y. F. Liang¹³, H. B. Liao⁵, C. X. Liu¹, F. Liu⁵, Fang Liu¹⁶, H. M. Liu¹, J. B. Liu¹, J. P. Liu¹⁷, R. G. Liu¹, Z. A. Liu¹, Z. X. Liu¹, F. Lu¹, G. R. Lu⁴, J. G. Lu¹, C. L. Luo⁸, X. L. Luo¹, F. C. Ma⁷, J. M. Ma¹, L. L. Ma¹¹, Q. M. Ma¹, X. Y. Ma¹, Z. P. Mao¹, X. H. Mo¹, J. Nie¹, Z. D. Nie¹, S. L. Olsen¹⁵, H. P. Peng¹⁶, N. D. Qi¹, C. D. Qian¹², H. Qin⁸, J. F. Qiu¹, Z. Y. Ren¹, G. Rong¹, L. Y. Shan¹, L. Shang¹, D. L. Shen¹, X. Y. Shen¹, H. Y. Sheng¹, F. Shi¹, X. Shi¹⁰, H. S. Sun¹, S. S. Sun¹⁶, Y. Z. Sun¹, Z. J. Sun¹, X. Tang¹, N. Tao¹⁶, Y. R. Tian¹⁴, G. L. Tong¹, G. S. Varner¹⁵, D. Y. Wang¹, J. Z. Wang¹, K. Wang¹⁶, L. Wang¹, L. S. Wang¹, M. Wang¹, P. Wang¹, P. L. Wang¹, S. Z. Wang¹, W. F. Wang¹, Y. F. Wang¹, Zhe Wang¹, Z. Wang¹, Zheng Wang¹, Z. Y. Wang¹, C. L. Wei¹, D. H. Wei³, N. Wu¹, Y. M. Wu¹, X. M. Xia¹, X. X. Xie¹, B. Xin⁷, G. F. Xu¹, H. Xu¹, Y. Xu¹, S. T. Xue¹, M. L. Yan¹⁶, F. Yang⁹, H. X. Yang¹, J. Yang¹⁶, S. D. Yang¹, Y. X. Yang³, M. Ye¹, M. H. Ye², Y. X. Ye¹⁶, L. H. Yi⁶, Z. Y. Yi¹, C. S. Yu¹, G. W. Yu¹, C. Z. Yuan¹, J. M. Yuan¹, Y. Yuan¹, Q. Yue¹, S. L. Zang¹, Yu Zeng¹, Y. Zeng⁶, B. X. Zhang¹, B. Y. Zhang¹, C. C. Zhang¹, D. H. Zhang¹, H. Y. Zhang¹, J. Zhang¹, J. Y. Zhang¹, J. W. Zhang¹, L. S. Zhang¹, Q. J. Zhang¹, S. Q. Zhang¹, X. M. Zhang¹, X. Y. Zhang¹¹, Y. J. Zhang¹⁰, Y. Y. Zhang¹, Yiyun Zhang¹³, Z. P. Zhang¹⁶, Z. Q. Zhang⁴, D. X. Zhao¹, J. B. Zhao¹, J. W. Zhao¹, M. G. Zhao⁹, P. P. Zhao¹, W. R. Zhao¹, X. J. Zhao¹, Y. B. Zhao¹, Z. G. Zhao^1,†, H. Q. Zheng¹⁰, J. P. Zheng¹, L. S. Zheng¹, Z. P. Zheng¹, X. C. Zhong¹, B. Q. Zhou¹, G. M. Zhou¹, L. Zhou¹, N. F. Zhou¹, K. J. Zhu¹, Q. M. Zhu¹, Y. C. Zhu¹, Y. S. Zhu¹, Yingchun Zhu¹, Z. A. Zhu¹, B. A. Zhuang¹, and B. S. Zou.¹ (BES Collaboration)

¹Institute of High Energy Physics, Beijing 100039, People’s Republic of China
²China Center of Advanced Science Technology, Beijing 100080, People’s Republic of China
³Guangxi Normal University, Guilin 541004, People’s Republic of China
⁴Henan Normal University, Xinxiang 453002, People’s Republic of China
⁵Huazhong Normal University, Wuhan 430079, People’s Republic of China
⁶Hunan University, Changsha 410082, People’s Republic of China
⁷Liaoning University, Shenyang 110036, People’s Republic of China
⁸Nanjing Normal University, Nanjing 210097, People’s Republic of China
⁹Nankai University, Tianjin 300071, People’s Republic of China
¹⁰Peking University, Beijing 100871, People’s Republic of China
¹¹Shandong University, Jinan 250100, People’s Republic of China
¹²Shanghai Jiaotong University, Shanghai 200030, People’s Republic of China
¹³Sichuan University, Chengdu 610064, People’s Republic of China
¹⁴Tsinghua University, Beijing 100084, People’s Republic of China
¹⁵University of Hawaii, Honolulu, Hawaii 96822, USA
¹⁶University of Science Technology of China, Hefei 230026, People’s Republic of China
¹⁷Wuhan University, Wuhan 430072, People’s Republic of China
¹⁸Zhejiang University, Hangzhou 310028, People’s Republic of China

^*Visiting professor to University of Michigan, Ann Arbor, Michigan 48109, USA.
^†Current address: Purdue University, West Lafayette, Indiana 47907, USA.

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Phys. Rev. D 70, 092002 – Published 5 November, 2004

DOI: https://doi.org/10.1103/PhysRevD.70.092002

Abstract

Using a sample of $14 \times 10^{6}$ $ψ (2 S)$ events accumulated with the BES II detector, evidence for $f_{0} (980) f_{0} (980)$ production in $χ_{c 0}$ decays is obtained for the first time; the branching ratio is determined to be $B [χ_{c 0} \to f_{0} (980) f_{0} (980) \to π^{+} π^{-} π^{+} π^{-}] = [7.6 \pm 1.9 (s t a t) \pm 1.6 (s y s t)] \times 10^{- 4}$ . The significance of the $f_{0} (980)$ signal is about 4.6 $σ$ .

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References (23)

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Evidence for $f_{0} (980) f_{0} (980)$ production in $χ_{c 0}$ decays

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Evidence for f0(980)f0(980) production in χc0 decays

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Evidence for $f_{0} (980) f_{0} (980)$ production in $χ_{c 0}$ decays