Phys. Rev. D
57,
3854–3859
(1998)
Search for ψ(2S) production in e+e- annihilations at 4.03 GeV
J. Z. Bai et al. (BES Collaboration)
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J. Z. Bai1, J. G. Bian1, I. Blum11, Z. W. Chai1, G. P. Chen1, H. F. Chen10, J. Chen3, J. C. Chen1, Y. Chen1, Y. B. Chen1, Y. Q. Chen1, B. S. Cheng1, X. Z. Cui1, H. L. Ding1, L. Y. Ding1, L. Y. Dong1, Z. Z. Du1, W. Dunwoodie7, S. Feng1, C. S. Gao1, M. L. Gao1, S. Q. Gao1, P. Gratton11, J. H. Gu1, S. D. Gu1, W. X. Gu1, Y. F. Gu1, Y. N. Guo1, S. W. Han1, Y. Han1, F. A. Harris8, J. He1, J. T. He1, M. He5, D. G. Hitlin2, G. Y. Hu1, H. M. Hu1, J. L. Hu1, Q. H. Hu1, T. Hu1, X. Q. Hu1, J. D. Huang1, Y. Z. Huang1, J. M. Izen11, C. H. Jiang1, Y. Jin1, Z. J. Ke1, M. H. Kelsey2, B. K. Kim11, D. Kong8, Y. F. Lai1, P. F. Lang1, A. Lankford9, C. G. Li1, D. Li1, H. B. Li1, J. Li1, P. Q. Li1, R. B. Li1, W. Li1, W. D. Li1, W. G. Li1, X. H. Li1, X. N. Li1, H. M. Liu1, J. Liu1, J. H. Liu1, R. G. Liu1, Y. Liu1, X. C. Lou11, B. Lowery11, F. Lu1, J. G. Lu1, J. Y. Lu1, L. C. Lu1, C. H. Luo1, A. M. Ma1, E. C. Ma1, J. M. Ma1, R. Malchow3, M. Mandelkern9, H. S. Mao1, Z. P. Mao1, X. C. Meng1, J. Nie1, S. L. Olsen8, J. Oyang2, D. Paluselli8, L. J. Pan8, J. Panetta2, F. Porter2, N. D. Qi1, X. R. Qi1, C. D. Qian6, J. F. Qiu1, Y. H. Qu1, Y. K. Que1, G. Rong1, M. Schernau9, B. Schmid9, J. Schultz9, Y. Y. Shao1, B. W. Shen1, D. L. Shen1, H. Shen1, X. Y. Shen1, H. Y. Sheng1, H. Z. Shi1, X. F. Song1, J. Standifird11, D. Stoker9, F. Sun1, H. S. Sun1, S. Q. Tang1, W. Toki3, G. L. Tong1, F. Wang1, L. S. Wang1, L. Z. Wang1, M. Wang1, Meng Wang1, P. Wang1, P. L. Wang1, S. M. Wang1, T. J. Wang1,*, Y. Y. Wang1, M. Weaver2, C. L. Wei1, Y. G. Wu1, D. M. Xi1, X. M. Xia1, P. P. Xie1, Y. Xie1, Y. H. Xie1, W. J. Xiong1, C. C. Xu1, G. F. Xu1, S. T. Xue1, J. Yan1, W. G. Yan1, C. M. Yang1, C. Y. Yang1, J. Yang1, W. Yang3, X. F. Yang1, M. H. Ye1, S. W. Ye10, Y. X. Ye10, K. Yi1, C. S. Yu1, C. X. Yu1, Y. H. Yu4, Z. Q. Yu1, Z. T. Yu1, C. Z. Yuan1, Y. Yuan1, B. Y. Zhang1, C. C. Zhang1, D. H. Zhang1, Dehong Zhang1, H. L. Zhang1, J. Zhang1, J. L. Zhang1, J. W. Zhang1, L. S. Zhang1, Q. J. Zhang1, S. Q. Zhang1, X. Y. Zhang5, Y. Zhang1, Y. Y. Zhang1, D. X. Zhao1, H. W. Zhao1,†, J. W. Zhao1, M. Zhao1, W. R. Zhao1, J. P. Zheng1, L. S. Zheng1, Z. P. Zheng1, G. P. Zhou1, H. S. Zhou1, L. Zhou1, Q. M. Zhu1, Y. C. Zhu1, Y. S. Zhu1, and B. A. Zhuang1 (BES Collaboration)
1Institute of High Energy Physics, Beijing 100039, People’s Republic of China
2California Institute of Technology, Pasadena, California 91125
3Colorado State University, Fort Collins, Colorado 80523
4Hangzhou University, Hangzhou 310028, People’s Republic of China
5Shandong University, Jinan 250100, People’s Republic of China
6Shanghai Jiaotong University, Shanghai 200030, People’s Republic of China
7Stanford Linear Accelerator Center, Stanford, California 94309
8University of Hawaii, Honolulu, Hawaii 96822
9University of California at Irvine, Irvine, California 92717
10University of Science and Technology of China, Hefei 230026, People’s Republic of China
11University of Texas at Dallas, Richardson, Texas 75083-0688
Received 8 October 1997; published in the issue dated 1 April 1998
A search is performed for the production of the ψ(2S) in e+e- annihilation at a center-of-mass energy of 4.03 GeV using the BES detector operated at the Beijing Electron Positron Collider (BEPC). The kinematic features of the reconstructed ψ(2S) signal are consistent with its being produced only in association with an energetic photon resulting from initial state radiation (ISR). Limits are placed on ψ(2S) production from the decay of unknown charmonia or metastable hybrids that might be produced in e+e- annihilations at 4.03 GeV. Under the assumption that the observed cross section for ψ(2S) production is due entirely to ISR, the partial width Γee of the ψ(2S) is measured to be 2.07±0.32keV.
© 1998 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.57.3854
DOI:
10.1103/PhysRevD.57.3854
*Deceased. †Present address: Beijing University, Beijing, China.
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