Measurements of the cross section for e+e- → hadrons at center-or-mass energies from 2 to 5 GeV

J. Z. Bai, Y. Ban, J. G. Bian, A. D. Chen, H. F. Chen, H. S. Chen, J. C. Chen, X. D. Chen, Y. B. Chen, B. S. Cheng, S. P. Chi, Y. P. Chu, J. B. Choi, X. Z. Cui, Y. S. Dai, L. Y. Dong, Z. Z. Du, W. Dunwoodie, H. Y. Fu, L. P. FuC. S. Gao, S. D. Gu, Y. N. Guo, Z. J. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, X. He, T. Hong, Y. K. Heng, G. Y. Hu, H. M. Hu, Q. H. Hu, T. Hu, G. S. Huang, X. P. Huang, Y. Z. Huang, J. M. Izen, X. B. Ji, C. H. Jiang, Y. Jin, B. D. Jones, J. S. Kang, Z. J. Ke, H. J. Kim, S. K. Kim, T. Y. Kim, D. Kong, Y. F. Lai, D. Li, H. B. Li, H. H. Li, J. Li, J. C. Li, P. Q. Li, Q. J. Li, R. Y. Li, W. Li, W. G. Li, X. N. Li, X. Q. Li, B. Liu, F. Liu, Feng Liu, H. M. Liu, J. Liu, J. P. Liu, T. R. Liu, R. G. Liu, Y. Liu, Z. X. Liu, X. C. Lou, G. R. Lu, F. Lu, J. G. Lu, Z. J. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, H. S. Mao, Z. P. Mao, X. C. Meng, X. H. Mo, J. Nie, Z. D. Nie, S. L. Olsen, D. Paluselli, H. Park, N. D. Qi, X. R. Qi, C. D. Qian

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Abstract

The values of the cross section for e+e- → hadrons were reported. The measurements were performed for 85 center-of-mass energies between 2 and 5 GeV with the upgraded Beijing Spectrometer (BESII) at the Beijing Electron-Positron collider. The values obtained from BESII had an average uncertainty of about 6.6% which represented a factor of 2 to 3 improvement in precision in the 2 to 5 GeV energy region.

Original languageEnglish
Article number101802
Pages (from-to)1018021-1018025
Number of pages5
JournalPhysical Review Letters
Volume88
Issue number10
StatePublished - 11 Mar 2002

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