Observation of two new N* peaks in J/ψ→pπ-n̄ and p̄π+n decays

M. Ablikim; J. Z. Bai; Y. Ban; J. G. Bian; X. Cai; J. F. Chang; H. F. Chen; H. S. Chen; H. X. Chen; J. C. Chen; Jin Chen; Jun 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; C. S. Gao; Y. N. Gao; M. Y. Gong; W. X. Gong; S. D. Gu; Y. N. Guo; Y. Q. Guo; Z. J. Guo; F. A. Harris; 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. B. Li; H. H. Li; J. Li; J. C. Li; Q. J. Li; R. B. Li; R. Y. Li; S. M. Li; W. G. Li; X. L. Li; X. Q. Li; X. S. Li; Y. F. Liang; H. B. Liao; C. X. Liu; F. Liu; Fang Liu; H. M. Liu; J. B. Liu; J. P. Liu; R. G. Liu; Z. A. Liu; Z. X. Liu; F. Lu; G. R. Lu; J. G. Lu; C. L. Luo; X. L. Luo; F. C. Ma; J. M. Ma; L. L. Ma; Q. M. Ma; X. Y. Ma; Z. P. Mao; 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; 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. X. Wang; J. Z. Wang; K. Wang; L. Wang; L. S. Wang; M. Wang; P. Wang; P. L. Wang; S. Z. Wang; W. F. Wang; Y. F. Wang; Zhe Wang; Z. Wang; Zheng Wang; Z. Y. Wang; C. L. Wei; D. H. 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; F. Yang; H. X. Yang; J. Yang; S. D. Yang; Y. X. Yang; M. Ye; M. H. Ye; Y. X. Ye; L. H. Yi; Z. Y. Yi; C. S. Yu; G. W. Yu; C. Z. Yuan; J. M. Yuan; Y. Yuan; Q. Yue; S. L. Zang; Y. Zeng; Y. Zeng; B. X. Zhang; B. Y. Zhang; C. C. Zhang; D. H. Zhang; H. Y. Zhang; J. Zhang; J. Y. Zhang; J. W. Zhang; L. S. Zhang; Q. J. Zhang; S. Q. Zhang; X. M. Zhang; X. Y. Zhang; Y. J. Zhang; Y. Y. Zhang; Y. Zhang; Z. P. Zhang; Z. Q. Zhang; D. X. Zhao; J. B. Zhao; J. W. Zhao; M. G. 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. C. Zhu; Y. S. Zhu; Y. Zhu; Z. A. Zhu; B. A. Zhuang; B. S. Zou

doi:10.1103/PhysRevLett.97.062001

Observation of two new N* peaks in J/ψ→pπ-n̄ and p̄π+n decays

M. Ablikim^*
, J. Z. Bai
, Y. Ban
, J. G. Bian
, X. Cai
, J. F. Chang
, H. F. Chen
, H. S. Chen
, H. X. Chen
, J. C. Chen
, Jin Chen
, Jun 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, C. S. Gao, Y. N. Gao, M. Y. Gong, W. X. Gong, S. D. Gu, Y. N. Guo, Y. Q. Guo, Z. J. Guo, F. A. Harris, 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. B. Li, H. H. Li, J. Li, J. C. Li, Q. J. Li, R. B. Li, R. Y. Li, S. M. Li, W. G. Li, X. L. Li, X. Q. Li, X. S. Li, Y. F. Liang, H. B. Liao, C. X. Liu, F. Liu, Fang Liu, H. M. Liu, J. B. Liu, J. P. Liu, R. G. Liu, Z. A. Liu, Z. X. Liu, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, X. L. Luo, F. C. Ma, J. M. Ma, L. L. Ma, Q. M. Ma, X. Y. Ma, Z. P. Mao, 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, 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. X. Wang, J. Z. Wang, K. Wang, L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, S. Z. Wang, W. F. Wang, Y. F. Wang, Zhe Wang, Z. Wang, Zheng Wang, Z. Y. Wang, C. L. Wei, D. H. 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, F. Yang, H. X. Yang, J. Yang, S. D. Yang, Y. X. Yang, M. Ye, M. H. Ye, Y. X. Ye, L. H. Yi, Z. Y. Yi, C. S. Yu, G. W. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, Q. Yue, S. L. Zang, Y. Zeng, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Y. Zhang, J. Zhang, J. Y. Zhang, J. W. Zhang, L. S. Zhang, Q. J. Zhang, S. Q. Zhang, X. M. Zhang, X. Y. Zhang, Y. J. Zhang, Y. Y. Zhang, Y. Zhang, Z. P. Zhang, Z. Q. Zhang, D. X. Zhao, J. B. Zhao, J. W. Zhao, M. G. 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. C. Zhu, Y. S. Zhu, Y. Zhu, Z. A. Zhu, B. A. Zhuang, B. S. Zou

^*Corresponding author for this work

CAS - Institute of High Energy Physics
Peking University
University of Science and Technology of China
Hunan University
China Center of Advanced Science and Technology World Laboratory
Zhejiang University
Tsinghua University
University of Hawai'i at Mānoa
Shandong University
Purdue University
Liaoning University
Nankai University
Sichuan University
Central China Normal University
Wuhan University
Henan Normal University
Nanjing Normal University
Shanghai Jiao Tong University
Guangxi Normal University
University of Michigan, Ann Arbor

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

67 Scopus citations

Abstract

The decay J/ψ→N̄Nπ provides an effective isospin 1/2 filter for the πN system due to isospin conservation. Using 58×106 J/ψ decays collected with the Beijing Electromagnetic Spectrometer at the Beijing Electron Positron Collider, more than 100 thousand J/ψ→pπ-n̄+c.c. events are obtained. Besides the two well-known N* peaks at around 1500MeV/c2 and 1670MeV/c2, there are two new, clear N* peaks in the pπ invariant mass spectrum around 1360MeV/c2 and 2030MeV/c2 with statistical significance of 11σ and 13σ, respectively. We identify these as the first direct observation of the N*(1440) peak and a long-sought missing N* peak above 2GeV/c2 in the πN invariant mass spectrum.

Original language	English
Article number	062001
Journal	Physical Review Letters
Volume	97
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.97.062001
State	Published - 2006
Externally published	Yes

Access to Document

10.1103/PhysRevLett.97.062001

Cite this

Ablikim, M., Bai, J. Z., Ban, Y., Bian, J. G., Cai, X., Chang, J. F., Chen, H. F., Chen, H. S., Chen, H. X., Chen, J. C., Chen, J., Chen, J., Chen, M. L., Chen, Y. B., Chi, S. P., Chu, Y. P., Cui, X. Z., Dai, H. L., Dai, Y. S., ... Zou, B. S. (2006). Observation of two new N* peaks in J/ψ→pπ-n̄ and p̄π+n decays. Physical Review Letters, 97(6), Article 062001. https://doi.org/10.1103/PhysRevLett.97.062001

@article{fa7ca6ff53884b91bb139f25f215da11,

title = "Observation of two new N* peaks in J/ψ→pπ-{\=n} and {\=p}π+n decays",

abstract = "The decay J/ψ→{\=N}Nπ provides an effective isospin 1/2 filter for the πN system due to isospin conservation. Using 58×106 J/ψ decays collected with the Beijing Electromagnetic Spectrometer at the Beijing Electron Positron Collider, more than 100 thousand J/ψ→pπ-{\=n}+c.c. events are obtained. Besides the two well-known N* peaks at around 1500MeV/c2 and 1670MeV/c2, there are two new, clear N* peaks in the pπ invariant mass spectrum around 1360MeV/c2 and 2030MeV/c2 with statistical significance of 11σ and 13σ, respectively. We identify these as the first direct observation of the N*(1440) peak and a long-sought missing N* peak above 2GeV/c2 in the πN invariant mass spectrum.",

author = "M. Ablikim and 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 Chen, \{J. C.\} and Jin Chen and Jun 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 Gao, \{C. S.\} 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 Harris, \{F. A.\} 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. B.\} 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 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 Fang Liu and Liu, \{H. M.\} and Liu, \{J. B.\} and Liu, \{J. P.\} and Liu, \{R. G.\} and Liu, \{Z. A.\} and Liu, \{Z. X.\} and F. Lu and Lu, \{G. R.\} 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, \{Q. M.\} and Ma, \{X. Y.\} and Mao, \{Z. P.\} 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 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. X.\} and Wang, \{J. Z.\} and K. Wang and L. Wang and Wang, \{L. S.\} and M. Wang and P. Wang and Wang, \{P. L.\} and Wang, \{S. Z.\} and Wang, \{W. F.\} and Wang, \{Y. F.\} and Zhe Wang and Z. Wang and Zheng Wang and Wang, \{Z. Y.\} and Wei, \{C. L.\} and Wei, \{D. H.\} 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 F. Yang and Yang, \{H. X.\} and J. Yang and Yang, \{S. D.\} and Yang, \{Y. X.\} and M. Ye and Ye, \{M. H.\} and Ye, \{Y. X.\} and Yi, \{L. H.\} and Yi, \{Z. Y.\} 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 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. 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 Zhang, \{Y. J.\} and Zhang, \{Y. Y.\} and Y. Zhang and Zhang, \{Z. P.\} and Zhang, \{Z. Q.\} and Zhao, \{D. X.\} and Zhao, \{J. B.\} and Zhao, \{J. W.\} and Zhao, \{M. G.\} 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 Zhu, \{Y. C.\} and Zhu, \{Y. S.\} and Y. Zhu and Zhu, \{Z. A.\} and Zhuang, \{B. A.\} and Zou, \{B. S.\}",

year = "2006",

doi = "10.1103/PhysRevLett.97.062001",

language = "英语",

volume = "97",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "6",

}

Ablikim, M, Bai, JZ, Ban, Y, Bian, JG, Cai, X, Chang, JF, Chen, HF, Chen, HS, Chen, HX, Chen, JC, Chen, J, 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, Gao, CS, Gao, YN, Gong, MY, Gong, WX, Gu, SD, Guo, YN, Guo, YQ, Guo, ZJ, Harris, FA, 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, HB, Li, HH, Li, J, Li, JC, Li, QJ, Li, RB, Li, RY, Li, SM, 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, ZA, Liu, ZX, Lu, F, Lu, GR, Lu, JG, Luo, CL, Luo, XL, Ma, FC, Ma, JM, Ma, LL, Ma, QM, Ma, XY, Mao, ZP, 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, Sun, HS, Sun, SS, Sun, YZ, Sun, ZJ, Tang, X, Tao, N, Tian, YR, Tong, GL, Varner, GS, Wang, DY, Wang, JX, Wang, JZ, Wang, K, Wang, L, Wang, LS, Wang, M, Wang, P, Wang, PL, Wang, SZ, Wang, WF, Wang, YF, Wang, Z, Wang, Z, Wang, Z, Wang, ZY, Wei, CL, Wei, DH, Wu, N, Wu, YM, Xia, XM, Xie, XX, Xin, B, Xu, GF, Xu, H, Xu, Y, Xue, ST, Yan, ML, Yang, F, Yang, HX, Yang, J, Yang, SD, Yang, YX, Ye, M, Ye, MH, Ye, YX, Yi, LH, Yi, ZY, Yu, CS, Yu, GW, Yuan, CZ, Yuan, JM, Yuan, Y, Yue, Q, Zang, SL, Zeng, Y, Zeng, Y, Zhang, BX, Zhang, BY, Zhang, CC, Zhang, DH, Zhang, HY, Zhang, J, Zhang, JY, Zhang, JW, Zhang, LS, Zhang, QJ, Zhang, SQ, Zhang, XM, Zhang, XY, Zhang, YJ, Zhang, YY, Zhang, Y, Zhang, ZP, Zhang, ZQ, Zhao, DX, Zhao, JB, Zhao, JW, Zhao, MG, 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, YC, Zhu, YS, Zhu, Y, Zhu, ZA, Zhuang, BA & Zou, BS 2006, 'Observation of two new N* peaks in J/ψ→pπ-n̄ and p̄π+n decays', Physical Review Letters, vol. 97, no. 6, 062001. https://doi.org/10.1103/PhysRevLett.97.062001

TY - JOUR

T1 - Observation of two new N* peaks in J/ψ→pπ-n̄ and p̄π+n decays

AU - Ablikim, M.

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. C.

AU - Chen, Jin

AU - Chen, Jun

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 - Gao, C. S.

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 - Harris, F. A.

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. B.

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. 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, Fang

AU - Liu, H. M.

AU - Liu, J. B.

AU - Liu, J. P.

AU - Liu, R. G.

AU - Liu, Z. A.

AU - Liu, Z. X.

AU - Lu, F.

AU - Lu, G. R.

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, Q. M.

AU - Ma, X. Y.

AU - Mao, Z. P.

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 - 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. X.

AU - Wang, J. Z.

AU - Wang, K.

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, Zhe

AU - Wang, Z.

AU - Wang, Zheng

AU - Wang, Z. Y.

AU - Wei, C. L.

AU - Wei, D. H.

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 - Yang, F.

AU - Yang, H. X.

AU - Yang, J.

AU - Yang, S. D.

AU - Yang, Y. X.

AU - Ye, M.

AU - Ye, M. H.

AU - Ye, Y. X.

AU - Yi, L. H.

AU - Yi, Z. Y.

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. 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. J.

AU - Zhang, Y. Y.

AU - Zhang, Y.

AU - Zhang, Z. P.

AU - Zhang, Z. Q.

AU - Zhao, D. X.

AU - Zhao, J. B.

AU - Zhao, J. W.

AU - Zhao, M. G.

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. C.

AU - Zhu, Y. S.

AU - Zhu, Y.

AU - Zhu, Z. A.

AU - Zhuang, B. A.

AU - Zou, B. S.

PY - 2006

Y1 - 2006

N2 - The decay J/ψ→N̄Nπ provides an effective isospin 1/2 filter for the πN system due to isospin conservation. Using 58×106 J/ψ decays collected with the Beijing Electromagnetic Spectrometer at the Beijing Electron Positron Collider, more than 100 thousand J/ψ→pπ-n̄+c.c. events are obtained. Besides the two well-known N* peaks at around 1500MeV/c2 and 1670MeV/c2, there are two new, clear N* peaks in the pπ invariant mass spectrum around 1360MeV/c2 and 2030MeV/c2 with statistical significance of 11σ and 13σ, respectively. We identify these as the first direct observation of the N*(1440) peak and a long-sought missing N* peak above 2GeV/c2 in the πN invariant mass spectrum.

AB - The decay J/ψ→N̄Nπ provides an effective isospin 1/2 filter for the πN system due to isospin conservation. Using 58×106 J/ψ decays collected with the Beijing Electromagnetic Spectrometer at the Beijing Electron Positron Collider, more than 100 thousand J/ψ→pπ-n̄+c.c. events are obtained. Besides the two well-known N* peaks at around 1500MeV/c2 and 1670MeV/c2, there are two new, clear N* peaks in the pπ invariant mass spectrum around 1360MeV/c2 and 2030MeV/c2 with statistical significance of 11σ and 13σ, respectively. We identify these as the first direct observation of the N*(1440) peak and a long-sought missing N* peak above 2GeV/c2 in the πN invariant mass spectrum.

UR - https://www.scopus.com/pages/publications/33747080550

U2 - 10.1103/PhysRevLett.97.062001

DO - 10.1103/PhysRevLett.97.062001

M3 - 文章

AN - SCOPUS:33747080550

SN - 0031-9007

VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

M1 - 062001

ER -

Observation of two new N* peaks in J/ψ→pπ-n̄ and p̄π+n decays

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