Access by Xinjiang University

Experimental study of $η_{c}$ decays into vector-vector final states

M. Ablikim¹, J. Z. Bai¹, Y. Ban¹¹, J. G. Bian¹, X. Cai¹, H. F. Chen¹⁶, H. S. Chen¹, H. X. Chen¹, J. C. Chen¹ et al. (BES Collaboration)

J. C. Chen¹, Jin Chen¹, Y. B. Chen¹, S. P. Chi², Y. P. Chu¹, X. Z. Cui¹, Y. S. Dai¹⁸, Z. Y. Deng¹, L. Y. Dong^1,*, Q. F. Dong¹⁴, S. X. Du¹, Z. Z. Du¹, J. Fang¹, S. S. Fang², C. D. Fu¹, C. S. Gao¹, Y. N. Gao¹⁴, S. D. Gu¹, Y. T. Gu⁴, Y. N. Guo¹, Y. Q. Guo¹, Z. J. Guo¹⁵, F. A. Harris¹⁵, K. L. He¹, M. He¹², Y. K. Heng¹, H. M. Hu¹, T. Hu¹, G. S. Huang^1,†, X. P. Huang¹, X. T. Huang¹², X. B. Ji¹, X. S. Jiang¹, J. B. Jiao¹², D. P. Jin¹, S. Jin¹, Yi Jin¹, Y. F. Lai¹, G. Li², H. B. Li¹, H. H. Li¹, J. Li¹, R. Y. Li¹, S. M. Li¹, W. D. Li¹, W. G. Li¹, X. L. Li⁸, X. Q. Li¹⁰, Y. L. Li⁴, Y. F. Liang¹³, H. B. Liao⁶, C. X. Liu¹, F. Liu⁶, Fang Liu¹⁶, H. H. Liu¹, H. M. Liu¹, J. Liu¹¹, J. B. Liu¹, J. P. Liu¹⁷, R. G. Liu¹, Z. A. Liu¹, F. Lu¹, G. R. Lu⁵, H. J. Lu¹⁶, J. G. Lu¹, C. L. Luo⁹, F. C. Ma⁸, H. L. Ma¹, L. L. Ma¹, Q. M. Ma¹, X. B. Ma⁵, Z. P. Mao¹, X. H. Mo¹, J. Nie¹, S. L. Olsen¹⁵, H. P. Peng¹⁶, N. D. Qi¹, H. Qin⁹, 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. Shi^11,‡, H. S. Sun¹, J. F. Sun¹, S. S. Sun¹, Y. Z. Sun¹, Z. J. Sun¹, Z. Q. Tan⁴, X. Tang¹, Y. R. Tian¹⁴, G. L. Tong¹, G. S. Varner¹⁵, D. Y. Wang¹, L. Wang¹, L. S. Wang¹, M. Wang¹, P. Wang¹, P. L. Wang¹, W. F. Wang^1,§, Y. F. Wang¹, Z. Wang¹, Z. Y. Wang¹, Zhe Wang¹, Zheng Wang², C. L. Wei¹, D. H. Wei¹, N. Wu¹, X. M. Xia¹, X. X. Xie¹, B. Xin^8,†, G. F. Xu¹, Y. Xu¹⁰, M. L. Yan¹⁶, F. Yang¹⁰, H. X. Yang¹, J. Yang¹⁶, Y. X. Yang³, M. H. Ye², Y. X. Ye¹⁶, Z. Y. Yi¹, G. W. Yu¹, C. Z. Yuan¹, J. M. Yuan¹, Y. Yuan¹, S. L. Zang¹, Y. Zeng⁷, Yu Zeng¹, B. X. Zhang¹, B. Y. Zhang¹, C. C. Zhang¹, D. H. Zhang¹, H. Y. Zhang¹, J. W. Zhang¹, J. Y. Zhang¹, Q. J. Zhang¹, X. M. Zhang¹, X. Y. Zhang¹², Yiyun Zhang¹³, Z. P. Zhang¹⁶, Z. Q. Zhang⁵, D. X. Zhao¹, J. W. Zhao¹, M. G. Zhao¹⁰, P. P. Zhao¹, W. R. Zhao¹, Z. G. Zhao^1,∥, H. Q. Zheng¹¹, J. P. Zheng¹, Z. P. Zheng¹, L. Zhou¹, N. F. Zhou¹, K. J. Zhu¹, Q. M. Zhu¹, Y. C. Zhu¹, Y. S. Zhu¹, Yingchun Zhu^1,¶, Z. A. Zhu¹, B. A. Zhuang¹, X. A. Zhuang¹, and B. S. Zou¹ (BES Collaboration)

¹Institute of High Energy Physics, Beijing 100049, People’s Republic of China
²China Center for Advanced Science and Technology (CCAST), Beijing 100080, People’s Republic of China
³Guangxi Normal University, Guilin 541004, People’s Republic of China
⁴Guangxi University, Nanning 530004, People’s Republic of China
⁵Henan Normal University, Xinxiang 453002, People’s Republic of China
⁶Huazhong Normal University, Wuhan 430079, People’s Republic of China
⁷Hunan University, Changsha 410082, People’s Republic of China
⁸Liaoning University, Shenyang 110036, People’s Republic of China
⁹Nanjing Normal University, Nanjing 210097, People’s Republic of China
¹⁰Nankai University, Tianjin 300071, People’s Republic of China
¹¹Peking University, Beijing 100871, People’s Republic of China
¹²Shandong University, Jinan 250100, 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 and 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

^*Current address: IA State University, Ames, IA 50011-3160, USA.
^†Current address: Purdue University, West Lafayette, IN 47907, USA.
^‡Current address: Cornell University, Ithaca, NY 14853, USA.
^§Current address: Laboratoire de l’Accélératear Linéaire, Orsay, F-91898, France.
^∥Current address: University of MI, Ann Arbor, MI 48109, USA.
^¶Current address: DESY, D-22607, Hamburg, Germany.

PDF

Phys. Rev. D 72, 072005 – Published 19 October, 2005

DOI: https://doi.org/10.1103/PhysRevD.72.072005

Abstract

Using 58 million $J / ψ$ events accumulated with the BES II detector, branching fractions for the $η_{c} \to V V$ decays, $η_{c} \to ρ ρ$ , $η_{c} \to K^{*} {\bar{K}}^{*}$ , $η_{c} \to ω ω$ , and $η_{c} \to ϕ ϕ$ , are measured. The branching fractions are $B r (η_{c} \to ρ ρ) = (1.23 \pm 0.37 \pm 0.50) \times 10^{- 2}$ , $B r (η_{c} \to K^{*} {\bar{K}}^{*}) = (10.3 \pm 2.6 \pm 4.3) \times 10^{- 3}$ , $B r (η_{c} \to ω ω) < 6.3 \times 10^{- 3}$ (90% C.L.), and $B r (η_{c} \to ϕ ϕ) = (2.5 \pm 0.5 \pm 0.9) \times 10^{- 3}$ . The process $η_{c} \to ω ϕ$ is also searched for, and the 90% C.L. upper limit $B r (η_{c} \to ω ϕ) < 1.7 \times 10^{- 3}$ is obtained for this process.

Article Text

References (12)

Y. Jia and G. D. Zhao, High Energy Phys. Nucl. Phys. 23, 765 (1999) (in Chinese).
S. Eidelman et al. (Particle Data Group), Phys. Lett. B 592, 1 (2004).
D. Bisello et al., Nucl. Phys. B350, 1 (1991).
H. Q. Zhou et al., Phys. Rev. D 71, 114002 (2005).
Maurice Benayoun et al., Nucl. Phys. B348, 327 (1991).
J. Z. Bai et al. (BES Collaboration), Nucl. Instrum. Methods Phys. Res., Sect. A 344, 319 (1994).
J. Z. Bai et al. (BES Collaboration), Nucl. Instrum. Methods Phys. Res., Sect. A 458, 627 (2001).
M. Ablikim et al. (BES Collaboration), Nucl. Instrum. Methods Phys. Res., Sect. A (to be published).
M. Ablikim et al. (BES Collaboration), Phys. Rev. D 70, 112008 (2004).
S. S. Fang et al., High Energy Phys. Nucl. Phys. 27, 277 (2003) (in Chinese).
M. Ablikim et al. (BES Collaboration), Phys. Lett. B 578, 16 (2004).
S. M. Li et al., High Energy Phys. Nucl. Phys. 28, 64 (2004) (in Chinese).

Physical Review D

Export citation

Export citation

Experimental study of $η_{c}$ decays into vector-vector final states

Abstract

Article Text

References (12)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Experimental study of ηc decays into vector-vector final states

Abstract

Article Text

References (12)

Experimental study of $η_{c}$ decays into vector-vector final states