Measurements of J/ψ → pp̄

J. Z. Bai; Y. Ban; J. G. Bian; X. Cai; J. F. Chang; H. F. Chen; H. S. Chen; H. X. Chen; J. Chen; J. C. Chen; J. Chen; M. L. Chen; Y. B. Chen; S. P. Chi; Y. P. Chu; X. Z. Cui; H. L. Dai; Y. S. Dai; Z. Y. Deng; L. Y. Dong; S. X. Du; Z. Z. Du; J. Fang; S. S. Fang; C. D. Fu; H. Y. Fu; L. P. Fu; C. S. Gao; M. L. Gao; Y. N. Gao; M. Y. Gong; W. X. Gong; S. D. Gu; Y. N. Guo; Y. Q. Guo; Z. J. Guo; S. W. Han; F. A. Harris; J. He; K. L. He; M. He; X. He; Y. K. Heng; H. M. Hu; T. Hu; G. S. Huang; L. Huang; X. P. Huang; X. B. Ji; Q. Y. Jia; C. H. Jiang; X. S. Jiang; D. P. Jin; S. Jin; Y. Jin; Y. F. Lai; F. Li; G. Li; H. H. Li; J. Li; J. C. Li; Q. J. Li; R. B. Li; R. Y. Li; S. M. Li; W. Li; W. G. Li; X. L. Li; X. Q. Li; X. S. Li; Y. F. Liang; H. B. Liao; C. X. Liu; F. Liu; F. Liu; H. M. Liu; J. B. Liu; J. P. Liu; R. G. Liu; Y. Liu; Z. A. Liu; Z. X. Liu; G. R. Lu; F. Lu; J. G. Lu; C. L. Luo; X. L. Luo; F. C. Ma; J. M. Ma; L. L. Ma; X. Y. Ma; Z. P. Mao; X. C. Meng; X. H. Mo; J. Nie; Z. D. Nie; S. L. Olsen; H. P. Peng; N. D. Qi; C. D. Qian; H. Qin; J. F. Qiu; Z. Y. Ren; G. Rong; L. Y. Shan; L. Shang; D. L. Shen; X. Y. Shen; H. Y. Sheng; F. Shi; X. Shi; L. W. Song; H. S. Sun; S. S. Sun; Y. Z. Sun; Z. J. Sun; X. Tang; N. Tao; Y. R. Tian; G. L. Tong; G. S. Varner; D. Y. Wang; J. Z. Wang; L. Wang; L. S. Wang; M. Wang; M. Wang; P. Wang; P. L. Wang; S. Z. Wang; W. F. Wang; Y. F. Wang; Z. Wang; Z. Wang; Z. Wang; Z. Y. Wang; C. L. Wei; N. Wu; Y. M. Wu; X. M. Xia; X. X. Xie; B. Xin; G. F. Xu; H. Xu; Y. Xu; S. T. Xue; M. L. Yan; W. B. Yan; F. Yang; H. X. Yang; J. Yang; S. D. Yang; Y. X. Yang; L. H. Yi; Z. Y. Yi; M. Ye; M. H. Ye; Y. X. Ye; C. S. Yu; G. W. Yu; C. Z. Yuan; J. M. Yuan; Y. Yuan; Q. Yue; S. L. Zang; Y. Zeng; B. X. Zhang; B. Y. Zhang; C. C. Zhang; D. H. Zhang; H. Y. Zhang; J. Zhang; J. M. Zhang; J. Y. Zhang; J. W. Zhang; L. S. Zhang; Q. J. Zhang; S. Q. Zhang; X. M. Zhang; X. Y. Zhang; Y. Zhang; Y. J. Zhang; Y. Y. Zhang; Z. P. Zhang; Z. Q. Zhang; D. X. Zhao; J. B. Zhao; J. W. Zhao; P. P. Zhao; W. R. Zhao; X. J. Zhao; Y. B. Zhao; Z. G. Zhao; H. Q. Zheng; J. P. Zheng; L. S. Zheng; Z. P. Zheng; X. C. Zhong; B. Q. Zhou; G. M. Zhou; L. Zhou; N. F. Zhou; K. J. Zhu; Q. M. Zhu; Y. Zhu; Y. C. Zhu; Y. S. Zhu; Z. A. Zhu; B. A. Zhuang; B. S. Zou

doi:10.1016/j.physletb.2004.04.022

Measurements of J/ψ → pp̄

J. Z. Bai^*
, Y. Ban
, J. G. Bian
, X. Cai
, J. F. Chang
, H. F. Chen
, H. S. Chen
, H. X. Chen
, J. Chen
, J. C. Chen
, J. Chen
, M. L. Chen
, Y. B. Chen
, S. P. Chi
, Y. P. Chu
, X. Z. Cui
, H. L. Dai
, Y. S. Dai
, Z. Y. Deng
, L. Y. Dong

S. X. Du, Z. Z. Du, J. Fang, S. S. Fang, C. D. Fu, H. Y. Fu, L. P. Fu, C. S. Gao, M. L. Gao, Y. N. Gao, M. Y. Gong, W. X. Gong, S. D. Gu, Y. N. Guo, Y. Q. Guo, Z. J. Guo, S. W. Han, F. A. Harris, J. He, K. L. He, M. He, X. He, Y. K. Heng, H. M. Hu, T. Hu, G. S. Huang, L. Huang, X. P. Huang, X. B. Ji, Q. Y. Jia, C. H. Jiang, X. S. Jiang, D. P. Jin, S. Jin, Y. Jin, Y. F. Lai, F. Li, G. Li, H. H. Li, J. Li, J. C. Li, Q. J. Li, R. B. Li, R. Y. Li, S. M. Li, W. Li, W. G. Li, X. L. Li, X. Q. Li, X. S. Li, Y. F. Liang, H. B. Liao, C. X. Liu, F. Liu, F. Liu, H. M. Liu, J. B. Liu, J. P. Liu, R. G. Liu, Y. Liu, Z. A. Liu, Z. X. Liu, G. R. Lu, F. Lu, J. G. Lu, C. L. Luo, X. L. Luo, F. C. Ma, J. M. Ma, L. L. Ma, X. Y. Ma, Z. P. Mao, X. C. Meng, X. H. Mo, J. Nie, Z. D. Nie, S. L. Olsen, H. P. Peng, N. D. Qi, C. D. Qian, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, L. Y. Shan, L. Shang, D. L. Shen, X. Y. Shen, H. Y. Sheng, F. Shi, X. Shi, L. W. Song, H. S. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, X. Tang, N. Tao, Y. R. Tian, G. L. Tong, G. S. Varner, D. Y. Wang, J. Z. Wang, L. Wang, L. S. Wang, M. Wang, M. Wang, P. Wang, P. L. Wang, S. Z. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. Wang, Z. Y. Wang, C. L. Wei, N. Wu, Y. M. Wu, X. M. Xia, X. X. Xie, B. Xin, G. F. Xu, H. Xu, Y. Xu, S. T. Xue, M. L. Yan, W. B. Yan, F. Yang, H. X. Yang, J. Yang, S. D. Yang, Y. X. Yang, L. H. Yi, Z. Y. Yi, M. Ye, M. H. Ye, Y. X. Ye, C. S. Yu, G. W. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, Q. Yue, S. L. Zang, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Y. Zhang, J. Zhang, J. M. Zhang, J. Y. Zhang, J. W. Zhang, L. S. Zhang, Q. J. Zhang, S. Q. Zhang, X. M. Zhang, X. Y. Zhang, Y. Zhang, Y. J. Zhang, Y. Y. Zhang, Z. P. Zhang, Z. Q. Zhang, D. X. Zhao, J. B. Zhao, J. W. Zhao, P. P. Zhao, W. R. Zhao, X. J. Zhao, Y. B. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, L. S. Zheng, Z. P. Zheng, X. C. Zhong, B. Q. Zhou, G. M. Zhou, L. Zhou, N. F. Zhou, K. J. Zhu, Q. M. Zhu, Y. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, B. A. Zhuang, B. S. Zou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The process J/ψ→pp̄ is studied using 57.7×10 ⁶ J/ψ events collected with the BESII detector at the Beijing Electron Positron Collider. The branching ratio is determined to be Br(J/ψ→pp̄)=(2.26±0.01±0.14)×10^-3, and the angular distribution is well described by dNdcosθ_p= 1+αcos²θ_p with α=0.676±0. 036±0.042, where θ_p is the angle between the proton and beam directions. The value of α obtained is in good agreement with the predictions of first-order QCD.

Original language	English
Pages (from-to)	42-48
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	591
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2004.04.022
State	Published - 1 Jul 2004
Externally published	Yes

Keywords

13.25.Gv
13.40.Hq
14.40.Gx

Access to Document

10.1016/j.physletb.2004.04.022

Cite this

Bai, J. Z., Ban, Y., Bian, J. G., Cai, X., Chang, J. F., Chen, H. F., Chen, H. S., Chen, H. X., Chen, J., Chen, J. C., Chen, J., Chen, M. L., Chen, Y. B., Chi, S. P., Chu, Y. P., Cui, X. Z., Dai, H. L., Dai, Y. S., Deng, Z. Y., ... Zou, B. S. (2004). Measurements of J/ψ → pp̄. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 591(1-2), 42-48. https://doi.org/10.1016/j.physletb.2004.04.022

@article{2e609497e835424eb745bb633d26d4de,

title = "Measurements of J/ψ → p{\=p}",

abstract = "The process J/ψ→p{\=p} is studied using 57.7×10 6 J/ψ events collected with the BESII detector at the Beijing Electron Positron Collider. The branching ratio is determined to be Br(J/ψ→p{\=p})=(2.26±0.01±0.14)×10-3, and the angular distribution is well described by dNdcosθp= 1+αcos2θp with α=0.676±0. 036±0.042, where θp is the angle between the proton and beam directions. The value of α obtained is in good agreement with the predictions of first-order QCD.",

keywords = "13.25.Gv, 13.40.Hq, 14.40.Gx",

author = "Bai, \{J. Z.\} and Y. Ban and Bian, \{J. G.\} and X. Cai and Chang, \{J. F.\} and Chen, \{H. F.\} and Chen, \{H. S.\} and Chen, \{H. X.\} and J. Chen and Chen, \{J. C.\} and J. Chen and Chen, \{M. L.\} and Chen, \{Y. B.\} and Chi, \{S. P.\} and Chu, \{Y. P.\} and Cui, \{X. Z.\} and Dai, \{H. L.\} and Dai, \{Y. S.\} and Deng, \{Z. Y.\} and Dong, \{L. Y.\} and Du, \{S. X.\} and Du, \{Z. Z.\} and J. Fang and Fang, \{S. S.\} and Fu, \{C. D.\} and Fu, \{H. Y.\} and Fu, \{L. P.\} and Gao, \{C. S.\} and Gao, \{M. L.\} and Gao, \{Y. N.\} and Gong, \{M. Y.\} and Gong, \{W. X.\} and Gu, \{S. D.\} and Guo, \{Y. N.\} and Guo, \{Y. Q.\} and Guo, \{Z. J.\} and Han, \{S. W.\} and Harris, \{F. A.\} and J. He and He, \{K. L.\} and M. He and X. He and Heng, \{Y. K.\} and Hu, \{H. M.\} and T. Hu and Huang, \{G. S.\} and L. Huang and Huang, \{X. P.\} and Ji, \{X. B.\} and Jia, \{Q. Y.\} and Jiang, \{C. H.\} and Jiang, \{X. S.\} and Jin, \{D. P.\} and S. Jin and Y. Jin and Lai, \{Y. F.\} and F. Li and G. Li and Li, \{H. H.\} and J. Li and Li, \{J. C.\} and Li, \{Q. J.\} and Li, \{R. B.\} and Li, \{R. Y.\} and Li, \{S. M.\} and W. Li and Li, \{W. G.\} and Li, \{X. L.\} and Li, \{X. Q.\} and Li, \{X. S.\} and Liang, \{Y. F.\} and Liao, \{H. B.\} and Liu, \{C. X.\} and F. Liu and F. Liu and Liu, \{H. M.\} and Liu, \{J. B.\} and Liu, \{J. P.\} and Liu, \{R. G.\} and Y. Liu and Liu, \{Z. A.\} and Liu, \{Z. X.\} and Lu, \{G. R.\} and F. Lu and Lu, \{J. G.\} and Luo, \{C. L.\} and Luo, \{X. L.\} and Ma, \{F. C.\} and Ma, \{J. M.\} and Ma, \{L. L.\} and Ma, \{X. Y.\} and Mao, \{Z. P.\} and Meng, \{X. C.\} and Mo, \{X. H.\} and J. Nie and Nie, \{Z. D.\} and Olsen, \{S. L.\} and Peng, \{H. P.\} and Qi, \{N. D.\} and Qian, \{C. D.\} and H. Qin and Qiu, \{J. F.\} and Ren, \{Z. Y.\} and G. Rong and Shan, \{L. Y.\} and L. Shang and Shen, \{D. L.\} and Shen, \{X. Y.\} and Sheng, \{H. Y.\} and F. Shi and X. Shi and Song, \{L. W.\} and Sun, \{H. S.\} and Sun, \{S. S.\} and Sun, \{Y. Z.\} and Sun, \{Z. J.\} and X. Tang and N. Tao and Tian, \{Y. R.\} and Tong, \{G. L.\} and Varner, \{G. S.\} and Wang, \{D. Y.\} and Wang, \{J. Z.\} and L. Wang and Wang, \{L. S.\} and M. Wang and M. Wang and P. Wang and Wang, \{P. L.\} and Wang, \{S. Z.\} and Wang, \{W. F.\} and Wang, \{Y. F.\} and Z. Wang and Z. Wang and Z. Wang and Wang, \{Z. Y.\} and Wei, \{C. L.\} and N. Wu and Wu, \{Y. M.\} and Xia, \{X. M.\} and Xie, \{X. X.\} and B. Xin and Xu, \{G. F.\} and H. Xu and Y. Xu and Xue, \{S. T.\} and Yan, \{M. L.\} and Yan, \{W. B.\} and F. Yang and Yang, \{H. X.\} and J. Yang and Yang, \{S. D.\} and Yang, \{Y. X.\} and Yi, \{L. H.\} and Yi, \{Z. Y.\} and M. Ye and Ye, \{M. H.\} and Ye, \{Y. X.\} and Yu, \{C. S.\} and Yu, \{G. W.\} and Yuan, \{C. Z.\} and Yuan, \{J. M.\} and Y. Yuan and Q. Yue and Zang, \{S. L.\} and Y. Zeng and Zhang, \{B. X.\} and Zhang, \{B. Y.\} and Zhang, \{C. C.\} and Zhang, \{D. H.\} and Zhang, \{H. Y.\} and J. Zhang and Zhang, \{J. M.\} and Zhang, \{J. Y.\} and Zhang, \{J. W.\} and Zhang, \{L. S.\} and Zhang, \{Q. J.\} and Zhang, \{S. Q.\} and Zhang, \{X. M.\} and Zhang, \{X. Y.\} and Y. Zhang and Zhang, \{Y. J.\} and Zhang, \{Y. Y.\} and Zhang, \{Z. P.\} and Zhang, \{Z. Q.\} and Zhao, \{D. X.\} and Zhao, \{J. B.\} and Zhao, \{J. W.\} and Zhao, \{P. P.\} and Zhao, \{W. R.\} and Zhao, \{X. J.\} and Zhao, \{Y. B.\} and Zhao, \{Z. G.\} and Zheng, \{H. Q.\} and Zheng, \{J. P.\} and Zheng, \{L. S.\} and Zheng, \{Z. P.\} and Zhong, \{X. C.\} and Zhou, \{B. Q.\} and Zhou, \{G. M.\} and L. Zhou and Zhou, \{N. F.\} and Zhu, \{K. J.\} and Zhu, \{Q. M.\} and Y. Zhu and Zhu, \{Y. C.\} and Zhu, \{Y. S.\} and Zhu, \{Z. A.\} and Zhuang, \{B. A.\} and Zou, \{B. S.\}",

year = "2004",

month = jul,

day = "1",

doi = "10.1016/j.physletb.2004.04.022",

language = "英语",

volume = "591",

pages = "42--48",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-2",

}

Bai, JZ, Ban, Y, Bian, JG, Cai, X, Chang, JF, Chen, HF, Chen, HS, Chen, HX, Chen, J, Chen, JC, Chen, J, Chen, ML, Chen, YB, Chi, SP, Chu, YP, Cui, XZ, Dai, HL, Dai, YS, Deng, ZY, Dong, LY, Du, SX, Du, ZZ, Fang, J, Fang, SS, Fu, CD, Fu, HY, Fu, LP, Gao, CS, Gao, ML, Gao, YN, Gong, MY, Gong, WX, Gu, SD, Guo, YN, Guo, YQ, Guo, ZJ, Han, SW, Harris, FA, He, J, He, KL, He, M, He, X, Heng, YK, Hu, HM, Hu, T, Huang, GS, Huang, L, Huang, XP, Ji, XB, Jia, QY, Jiang, CH, Jiang, XS, Jin, DP, Jin, S, Jin, Y, Lai, YF, Li, F, Li, G, Li, HH, Li, J, Li, JC, Li, QJ, Li, RB, Li, RY, Li, SM, Li, W, Li, WG, Li, XL, Li, XQ, Li, XS, Liang, YF, Liao, HB, Liu, CX, Liu, F, Liu, F, Liu, HM, Liu, JB, Liu, JP, Liu, RG, Liu, Y, Liu, ZA, Liu, ZX, Lu, GR, Lu, F, Lu, JG, Luo, CL, Luo, XL, Ma, FC, Ma, JM, Ma, LL, Ma, XY, Mao, ZP, Meng, XC, Mo, XH, Nie, J, Nie, ZD, Olsen, SL, Peng, HP, Qi, ND, Qian, CD, Qin, H, Qiu, JF, Ren, ZY, Rong, G, Shan, LY, Shang, L, Shen, DL, Shen, XY, Sheng, HY, Shi, F, Shi, X, Song, LW, Sun, HS, Sun, SS, Sun, YZ, Sun, ZJ, Tang, X, Tao, N, Tian, YR, Tong, GL, Varner, GS, Wang, DY, Wang, JZ, Wang, L, Wang, LS, Wang, M, Wang, M, Wang, P, Wang, PL, Wang, SZ, Wang, WF, Wang, YF, Wang, Z, Wang, Z, Wang, Z, Wang, ZY, Wei, CL, Wu, N, Wu, YM, Xia, XM, Xie, XX, Xin, B, Xu, GF, Xu, H, Xu, Y, Xue, ST, Yan, ML, Yan, WB, Yang, F, Yang, HX, Yang, J, Yang, SD, Yang, YX, Yi, LH, Yi, ZY, Ye, M, Ye, MH, Ye, YX, Yu, CS, Yu, GW, Yuan, CZ, Yuan, JM, Yuan, Y, Yue, Q, Zang, SL, Zeng, Y, Zhang, BX, Zhang, BY, Zhang, CC, Zhang, DH, Zhang, HY, Zhang, J, Zhang, JM, Zhang, JY, Zhang, JW, Zhang, LS, Zhang, QJ, Zhang, SQ, Zhang, XM, Zhang, XY, Zhang, Y, Zhang, YJ, Zhang, YY, Zhang, ZP, Zhang, ZQ, Zhao, DX, Zhao, JB, Zhao, JW, Zhao, PP, Zhao, WR, Zhao, XJ, Zhao, YB, Zhao, ZG, Zheng, HQ, Zheng, JP, Zheng, LS, Zheng, ZP, Zhong, XC, Zhou, BQ, Zhou, GM, Zhou, L, Zhou, NF, Zhu, KJ, Zhu, QM, Zhu, Y, Zhu, YC, Zhu, YS, Zhu, ZA, Zhuang, BA & Zou, BS 2004, 'Measurements of J/ψ → pp̄', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 591, no. 1-2, pp. 42-48. https://doi.org/10.1016/j.physletb.2004.04.022

TY - JOUR

T1 - Measurements of J/ψ → pp̄

AU - Bai, J. Z.

AU - Ban, Y.

AU - Bian, J. G.

AU - Cai, X.

AU - Chang, J. F.

AU - Chen, H. F.

AU - Chen, H. S.

AU - Chen, H. X.

AU - Chen, J.

AU - Chen, J. C.

AU - Chen, J.

AU - Chen, M. L.

AU - Chen, Y. B.

AU - Chi, S. P.

AU - Chu, Y. P.

AU - Cui, X. Z.

AU - Dai, H. L.

AU - Dai, Y. S.

AU - Deng, Z. Y.

AU - Dong, L. Y.

AU - Du, S. X.

AU - Du, Z. Z.

AU - Fang, J.

AU - Fang, S. S.

AU - Fu, C. D.

AU - Fu, H. Y.

AU - Fu, L. P.

AU - Gao, C. S.

AU - Gao, M. L.

AU - Gao, Y. N.

AU - Gong, M. Y.

AU - Gong, W. X.

AU - Gu, S. D.

AU - Guo, Y. N.

AU - Guo, Y. Q.

AU - Guo, Z. J.

AU - Han, S. W.

AU - Harris, F. A.

AU - He, J.

AU - He, K. L.

AU - He, M.

AU - He, X.

AU - Heng, Y. K.

AU - Hu, H. M.

AU - Hu, T.

AU - Huang, G. S.

AU - Huang, L.

AU - Huang, X. P.

AU - Ji, X. B.

AU - Jia, Q. Y.

AU - Jiang, C. H.

AU - Jiang, X. S.

AU - Jin, D. P.

AU - Jin, S.

AU - Jin, Y.

AU - Lai, Y. F.

AU - Li, F.

AU - Li, G.

AU - Li, H. H.

AU - Li, J.

AU - Li, J. C.

AU - Li, Q. J.

AU - Li, R. B.

AU - Li, R. Y.

AU - Li, S. M.

AU - Li, W.

AU - Li, W. G.

AU - Li, X. L.

AU - Li, X. Q.

AU - Li, X. S.

AU - Liang, Y. F.

AU - Liao, H. B.

AU - Liu, C. X.

AU - Liu, F.

AU - Liu, H. M.

AU - Liu, J. B.

AU - Liu, J. P.

AU - Liu, R. G.

AU - Liu, Y.

AU - Liu, Z. A.

AU - Liu, Z. X.

AU - Lu, G. R.

AU - Lu, F.

AU - Lu, J. G.

AU - Luo, C. L.

AU - Luo, X. L.

AU - Ma, F. C.

AU - Ma, J. M.

AU - Ma, L. L.

AU - Ma, X. Y.

AU - Mao, Z. P.

AU - Meng, X. C.

AU - Mo, X. H.

AU - Nie, J.

AU - Nie, Z. D.

AU - Olsen, S. L.

AU - Peng, H. P.

AU - Qi, N. D.

AU - Qian, C. D.

AU - Qin, H.

AU - Qiu, J. F.

AU - Ren, Z. Y.

AU - Rong, G.

AU - Shan, L. Y.

AU - Shang, L.

AU - Shen, D. L.

AU - Shen, X. Y.

AU - Sheng, H. Y.

AU - Shi, F.

AU - Shi, X.

AU - Song, L. W.

AU - Sun, H. S.

AU - Sun, S. S.

AU - Sun, Y. Z.

AU - Sun, Z. J.

AU - Tang, X.

AU - Tao, N.

AU - Tian, Y. R.

AU - Tong, G. L.

AU - Varner, G. S.

AU - Wang, D. Y.

AU - Wang, J. Z.

AU - Wang, L.

AU - Wang, L. S.

AU - Wang, M.

AU - Wang, P.

AU - Wang, P. L.

AU - Wang, S. Z.

AU - Wang, W. F.

AU - Wang, Y. F.

AU - Wang, Z.

AU - Wang, Z. Y.

AU - Wei, C. L.

AU - Wu, N.

AU - Wu, Y. M.

AU - Xia, X. M.

AU - Xie, X. X.

AU - Xin, B.

AU - Xu, G. F.

AU - Xu, H.

AU - Xu, Y.

AU - Xue, S. T.

AU - Yan, M. L.

AU - Yan, W. B.

AU - Yang, F.

AU - Yang, H. X.

AU - Yang, J.

AU - Yang, S. D.

AU - Yang, Y. X.

AU - Yi, L. H.

AU - Yi, Z. Y.

AU - Ye, M.

AU - Ye, M. H.

AU - Ye, Y. X.

AU - Yu, C. S.

AU - Yu, G. W.

AU - Yuan, C. Z.

AU - Yuan, J. M.

AU - Yuan, Y.

AU - Yue, Q.

AU - Zang, S. L.

AU - Zeng, Y.

AU - Zhang, B. X.

AU - Zhang, B. Y.

AU - Zhang, C. C.

AU - Zhang, D. H.

AU - Zhang, H. Y.

AU - Zhang, J.

AU - Zhang, J. M.

AU - Zhang, J. Y.

AU - Zhang, J. W.

AU - Zhang, L. S.

AU - Zhang, Q. J.

AU - Zhang, S. Q.

AU - Zhang, X. M.

AU - Zhang, X. Y.

AU - Zhang, Y.

AU - Zhang, Y. J.

AU - Zhang, Y. Y.

AU - Zhang, Z. P.

AU - Zhang, Z. Q.

AU - Zhao, D. X.

AU - Zhao, J. B.

AU - Zhao, J. W.

AU - Zhao, P. P.

AU - Zhao, W. R.

AU - Zhao, X. J.

AU - Zhao, Y. B.

AU - Zhao, Z. G.

AU - Zheng, H. Q.

AU - Zheng, J. P.

AU - Zheng, L. S.

AU - Zheng, Z. P.

AU - Zhong, X. C.

AU - Zhou, B. Q.

AU - Zhou, G. M.

AU - Zhou, L.

AU - Zhou, N. F.

AU - Zhu, K. J.

AU - Zhu, Q. M.

AU - Zhu, Y.

AU - Zhu, Y. C.

AU - Zhu, Y. S.

AU - Zhu, Z. A.

AU - Zhuang, B. A.

AU - Zou, B. S.

PY - 2004/7/1

Y1 - 2004/7/1

N2 - The process J/ψ→pp̄ is studied using 57.7×10 6 J/ψ events collected with the BESII detector at the Beijing Electron Positron Collider. The branching ratio is determined to be Br(J/ψ→pp̄)=(2.26±0.01±0.14)×10-3, and the angular distribution is well described by dNdcosθp= 1+αcos2θp with α=0.676±0. 036±0.042, where θp is the angle between the proton and beam directions. The value of α obtained is in good agreement with the predictions of first-order QCD.

AB - The process J/ψ→pp̄ is studied using 57.7×10 6 J/ψ events collected with the BESII detector at the Beijing Electron Positron Collider. The branching ratio is determined to be Br(J/ψ→pp̄)=(2.26±0.01±0.14)×10-3, and the angular distribution is well described by dNdcosθp= 1+αcos2θp with α=0.676±0. 036±0.042, where θp is the angle between the proton and beam directions. The value of α obtained is in good agreement with the predictions of first-order QCD.

KW - 13.25.Gv

KW - 13.40.Hq

KW - 14.40.Gx

UR - https://www.scopus.com/pages/publications/2942542791

U2 - 10.1016/j.physletb.2004.04.022

DO - 10.1016/j.physletb.2004.04.022

M3 - 文章

AN - SCOPUS:2942542791

SN - 0370-2693

VL - 591

SP - 42

EP - 48

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Measurements of J/ψ → pp̄

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