First observation of ψ(2S)→pn¯π-+c.c.

M. Ablikim,J. Bai, Y. Ban,J. Bian,X. Cai,H. Chen,J. Chen,Jin Chen, Y. Chen,S. Chi,Y. Chu,X. Cui,Y. Dai,L. Diao,Z. Deng,Q. Dong,S. Du,J. Fang,S. Fang, C. Fu,C. Gao, Y. Gao,S. Gu, Y. Gu, Y. Guo, Z. Guo,F. Harris, K. He,M. He, Y. Heng,H. Hu,T. Hu, G. Huang,X. Huang,X. Ji,X. Jiang,J. Jiao,D. Jin, S. Jin,Yi Jin, Y. Lai,G. Li, H. Li,J. Li, R. Li,S. Li, W. Li,X. Li,Y. Li, Y. Liang,H. Liao,B. Liu, C. Liu,F. Liu,Fang Liu,H. Liu,J. Liu,Q. Liu,R. Liu,Z. Liu,Y. Lou,F. Lu,G. Lu,J. Lu,C. Luo,F. Ma,H. Ma,L. Ma,Q. Ma,X. Ma,Z. Mao, X. Mo, J. Nie,S. Olsen,H. Peng,R. Ping,N. Qi,H. Qin, J. Qiu,Z. Ren,G. Rong,L. Shan,L. Shang,C. Shen,D. Shen,X. Shen,H. Sheng,H. Sun,J. Sun,S. Sun,Y. Sun,Z. Sun,Z. Tan,X. Tang,G. Tong, G. Varner, D. Wang, L. Wang,M. Wang, P. Wang, W. Wang,Y. Wang, Z. Wang,Zhe Wang, Zheng Wang,C. Wei,D. Wei,N. Wu,X. Xia,X. Xie,G. Xu, X. Xu,Y. Xu, M. Yan,H. Yang, Y. Yang,M. Ye,Y. Ye,Z. Yi, G. Yu,C. Yuan, J. Yuan,Y. Yuan,S. Zang, Y. Zeng,Yu Zeng,B. Zhang, C. Zhang, D. Zhang,H. Zhang,J. Zhang,S. Zhang, X. Zhang,Yiyun Zhang,Z. Zhang, D. Zhao,J. Zhao,M. Zhao,P. Zhao, W. Zhao,Z. Zhao, H. Zheng, J. Zheng,Z. Zheng,L. Zhou,N. Zhou, K. Zhu, Q. Zhu,Y. Zhu,Yingchun Zhu, Z. Zhu,B. Zhuang,X. Zhuang,B. Zou

PHYSICAL REVIEW D（2006）

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摘要

Using 14x10(6) psi(2S) events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider, the branching fractions of psi(2S) decays to p (n) over bar pi(-) and (n) over barn pi(+) and the branching fractions of the main background channels psi(2S)-> p (n) over bar pi(-)pi(0), psi(2S)->gamma chi(c0)->gamma p (n) over bar pi(-), psi(2S)->gamma chi(c2)->gamma p (n) over bar pi(-), and psi(2S)->gamma chi(cJ)->gamma p (n) over bar pi(-)pi(0) are determined. The contributions of the N-* resonances in psi(2S)-> p (n) over bar pi(-)+c.c. are also discussed.

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