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46 results on '"Y. C. Lou"'

1. OP011/#250 Postmenopausal status and elevated serum level of cancer antigen 125 significantly predicted concurrent endometrial cancer in women diagnosed with atypical endometrial hyperplasia before surgery

Author: Y-C Lou, X Chen, and J Guan
Subjects: Elevated serum, Cancer antigen, medicine.medical_specialty, business.industry, Endometrial cancer, Internal medicine, medicine, medicine.disease, business, Gastroenterology, Atypical Endometrial Hyperplasia
Published: 2021
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2. The Understanding of Gate Capacitance Matching on Achieving a High Performance NC MOSFET with Sufficient Mobility

Author: P. Husan, Steve S. Chung, F. L. Li, E-Ray Hsieh, C. K. Chiang, Y. C. Lou, and Chuan-Hsi Liu
Subjects: Materials science, Scattering, Annealing (metallurgy), business.industry, Hardware_PERFORMANCEANDRELIABILITY, Capacitance, Ferroelectricity, Dipole, MOSFET, Hardware_INTEGRATEDCIRCUITS, Optoelectronics, business, Gate capacitance, Hardware_LOGICDESIGN, Negative impedance converter
Abstract: We develop experimental approaches to quantitatively extract the negative capacitance of MIM in a gate stacked NCFET. It was found that the NC effect is highly dependent on the grain and dipole behaviors with different annealing temperature. Also, to achieve a better design of high-performance NCFET, we explore not only the capacitance matching between ferroelectric HZO MIM and MOSFET but also how effective mobility is affected by HZO dipoles. For capacitance matching, we observe a 50x enhancement of overall gate capacitance triggered by NC effect, while, however, it adversely generated the degradation of the mobility. This mobility degradation is induced by the remote scattering from the ferroelectric HZO dipoles. Fortunately, if suitable polarization can be formed to align the HZO dipoles, the effects of remote scattering can be mitigated. From a trade-off between gate capacitance and the mobility, an NCFET with desirable performance can be achieved.
Published: 2019
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3. Search for the rare decays J/ψ→Ds−π+, J/ψ→D−π+, and J/ψ→D¯0K¯0

Author: Dapeng Jin, H. S. Sun, J. H. Liu, J. W. Zhao, Y. F. Liang, W. R. Zhao, C. Z. Yuan, H. Y. Zhang, Q. F. Dong, M. G. Zhao, J. C. Chen, C. S. Gao, J. F. Qiu, G. F. Xu, Hui Liu, S. Jin, Shaojie Zhang, Z. G. Zhao, J. B. Liu, J. Hou, Y. S. Dai, T. Hu, Y. X. Yang, X. P. Xu, X. M. Xia, S. L. Zang, X. S. Jiang, J. Fang, J. Nie, Fang Liu, Y. P. Chu, C.D. Fu, H. X. Chen, Z.J. Guo, S.L. Olsen, Klaus Götzen, D. H. Zhang, X. X. Xie, M. Wang, D. L. Shen, Zhenyu Zhang, B. J. Liu, G. S. Huang, D. X. Zhao, K. J. Peters, K. L. He, Z. P. Zheng, X. D. Ruan, S. S. Fang, N. D. Qi, X. T. Huang, H. L. Ma, X. H. Mo, H. H. Liu, X. Y. Jiang, X. A. Zhuang, Y. K. Heng, Z. Wang, Y. Weng, M. L. Yan, Z. Y. Ren, D. H. Wei, Yin Xu, B. X. Zhang, R. G. Liu, L. Y. Diao, L. S. Wang, Jin Chen, F. A. Harris, Y. N. Guo, G. S. Varner, J. Li, S. S. Sun, Z. A. Zhu, X. Q. Li, C. P. Shen, M. He, G. L. Tong, Z. Y. Wang, S. M. Li, N. Wu, H.Q. Zheng, Y. B. Chen, H. Q. Zhang, Z. J. Sun, H. B. Liao, X. L. Li, Y. C. Lou, Y.N. Gao, J. G. Lu, Y. Zeng, H. S. Chen, L. L. Ma, F. C. Ma, Yongzhao Sun, H. M. Hu, C. L. Luo, S. D. Gu, Xiao Cai, Zheng Wang, G. R. Lu, L. Zhou, H. B. Li, S. X. Du, Y. C. Zhu, F. Liu, X. Tang, L. Z. Wang, Q. M. Zhu, G. Rong, J. Y. Zhang, M. H. Ye, H. F. Chen, W. F. Wang, Xiaomei Zhang, X. Y. Shen, Yiyun Zhang, J. B. Jiao, C. L. Wei, Y. X. Ye, X. B. Ji, L. Shang, J. P. Liu, Jian Liu, B. A. Zhuang, C. X. Liu, Y. Yuan, Q. M. Ma, P. Wang, Zhentao Zhang, R. G. Ping, W. D. Li, Z. A. Liu, G. Li, P. L. Wang, Y. Ban, Y. F. Wang, H. X. Yang, J. W. Zhang, Y. T. Gu, D. Y. Wang, G. W. Yu, Y. F. Lai, B. S. Zou, Xiao-yan Li, W. G. Li, M. Ablikim, R. Y. Li, L. L. Wang, Jun Hu, K. J. Zhu, J. Z. Bai, Z. P. Mao, H. Y. Sheng, F. Lu, P. P. Zhao, Zhang Bo, Qian Liu, H. Qin, L. Y. Shan, C. C. Zhang, J. P. Zheng, Z. Y. Deng, and Y. S. Zhu
Subjects: Physics, Nuclear and High Energy Physics, Electron–positron annihilation, Atomic physics
Abstract: Rare decay modes J / ψ → D s − π + + c.c. , J / ψ → D − π + + c.c. , and J / ψ → D ¯ 0 K ¯ 0 + c.c. are searched for using 5.77 × 10 7 J / ψ events collected with the BESII detector at the BEPC. No signal above background is observed. We present upper limits on the branching fractions of B ( J / ψ → D s − π + ) 1.3 × 10 −4 , B ( J / ψ → D − π + ) 7.5 × 10 −5 , and B ( J / ψ → D ¯ 0 K ¯ 0 ) 1.7 × 10 −4 at the 90% confidence level.
Published: 2008
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4. Determination of the ψ(3770), ψ(4040), ψ(4160) and ψ(4415) resonance parameters

Author: B. J. Liu, S. S. Fang, Z. Wang, M. Wang, S. L. Zang, H. Y. Sheng, X. S. Jiang, J. Nie, G. F. Xu, C.D. Fu, H. X. Chen, Shaojie Zhang, J. P. Zheng, X. P. Xu, X. M. Xia, Y. P. Chu, P. P. Zhao, H. L. Ma, Y. Weng, H. Q. Zhang, Z. J. Sun, Y. Xu, Z. A. Zhu, Y. Zeng, R. G. Liu, H. Qin, N. Wu, Dapeng Jin, Z. P. Zhang, J. W. Zhao, J. P. Liu, H. M. Hu, Jian Liu, W. R. Zhao, Z. Y. Ren, Q. M. Ma, S. Jin, Y. N. Guo, C. Z. Yuan, H. Y. Zhang, Q. F. Dong, H. B. Liao, J. G. Lu, B. A. Zhuang, Zhang Bo, C. C. Zhang, C. X. Liu, Yongzhao Sun, Hui Liu, C. S. Gao, Y. Yuan, D. L. Shen, G. Rong, H. F. Chen, N. D. Qi, Z. G. Zhao, J. F. Qiu, W. F. Wang, D. H. Wei, L. L. Ma, Fang Liu, Qian Liu, L. Y. Shan, Z. Y. Wang, Z. Y. Deng, Zheng Wang, X. T. Huang, Z.J. Guo, K. L. He, X. D. Ruan, X. A. Zhuang, Y. S. Zhu, L. S. Wang, Y. F. Wang, X. H. Mo, Jin Chen, F. A. Harris, B. X. Zhang, Z. X. Zhang, Y. B. Chen, J. C. Chen, Y. F. Lai, J. Fang, J. Li, S. S. Sun, S. X. Du, H. X. Yang, J. H. Liu, G. R. Lu, L. Zhou, H. B. Li, Y. N. Gao, J. Y. Zhang, J. W. Zhang, C. L. Luo, G. W. Yu, D. H. Zhang, S.L. Olsen, Xiao Cai, J. Hou, X. B. Ji, Q. M. Zhu, G. S. Huang, Y. X. Yang, F. C. Ma, Y. K. Heng, X. Y. Jiang, B. S. Zou, X. Y. Shen, Xiao-yan Li, Y. S. Dai, H. S. Sun, Y. F. Liang, S. M. Li, M. H. Ye, M. G. Zhao, X. Q. Li, X. X. Xie, H. S. Chen, D. X. Zhao, X. Tang, Han-Qing Zheng, Y. C. Zhu, F. Liu, M. L. Yan, C. L. Wei, L. Shang, L. Y. Diao, T. Hu, J. B. Liu, G. S. Varner, X. L. Li, Y. C. Lou, L. Z. Wang, M. He, G. L. Tong, J. B. Jiao, Xiaomei Zhang, Yiyun Zhang, S. D. Gu, Y. X. Ye, M. Ablikim, R. Y. Li, L. L. Wang, Jun Hu, K. J. Zhu, P. Wang, D. Y. Wang, W. G. Li, Z. P. Zheng, H. H. Liu, C. P. Shen, Z. A. Liu, G. Li, P. L. Wang, Y. Ban, Y. T. Gu, R. G. Ping, F. Lu, W. D. Li, J. Z. Bai, and Z. P. Mao
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Electron–positron annihilation, Radiative transfer, High mass, Resonance, High Energy Physics::Experiment, Electron
Abstract: R values measured with the BESII detector at center-of-mass energies between 3.7 and 5.0 GeV are fitted to determine resonance parameters (mass, total width, electron width) of the high mass charmonium states, ψ ( 3770 ) , ψ ( 4040 ) , ψ ( 4160 ) and ψ ( 4415 ) . Various effects, including the interferences and relative phases between the resonances, the energy-dependence of the full widths, and the initial state radiative correction, are examined. The results are compared to previous studies.
Published: 2008
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5. First observation of J/ψ and ψ(2S) decaying to nKS0Λ¯+c.c

Author: X. P. Xu, H. Y. Sheng, X. M. Xia, C. C. Zhang, Y. P. Chu, C. L. Luo, Xiao Cai, Z. Y. Deng, P. P. Zhao, H. Qin, Y. S. Zhu, C. S. Gao, Z. Y. Wang, J. F. Qiu, T. Hu, X. X. Xie, Y. X. Yang, S. Jin, H. Q. Zhang, Z. J. Sun, Y. C. Zhu, F. Liu, H. L. Ma, Klaus Götzen, J. Z. Bai, Y. Zeng, Y. Weng, Dapeng Jin, Z. P. Zhang, Zhang Bo, Shaojie Zhang, J. P. Zheng, D. X. Zhao, K. J. Peters, H. X. Yang, J. W. Zhang, M. Ablikim, G. W. Yu, Z. Y. Ren, X. A. Zhuang, M. Wang, M. L. Yan, L. Y. Diao, M. He, G. L. Tong, Y. Xu, Z. A. Zhu, X. Y. Jiang, R. Y. Li, J. Fang, B. S. Zou, Z. P. Zheng, H. B. Liao, Xiao-yan Li, L. Z. Wang, Xiaomei Zhang, Y. N. Guo, Yiyun Zhang, N. Wu, X. L. Li, H. H. Liu, Y. C. Lou, J. G. Lu, S. D. Gu, Jin Chen, F. A. Harris, J. P. Liu, Z. P. Mao, Z. G. Zhao, X. H. Mo, B. X. Zhang, Z. X. Zhang, Jian Liu, Yongzhao Sun, J. Hou, Y. X. Ye, L. L. Ma, L. L. Wang, D. L. Shen, Qian Liu, S. L. Zang, J. B. Jiao, C. P. Shen, X. S. Jiang, L. S. Wang, R. G. Ping, S. X. Du, J. Nie, Zheng Wang, Q. M. Ma, L. Y. Shan, S.L. Olsen, N. D. Qi, D. H. Wei, F. Lu, C.D. Fu, X. Y. Shen, Y. N. Gao, G. F. Xu, J. Y. Zhang, J. H. Liu, Fang Liu, H. X. Chen, Y. F. Wang, X. T. Huang, W. D. Li, Y. F. Lai, Z. A. Liu, G. Li, X. B. Ji, G. R. Lu, L. Zhou, H. B. Li, R. G. Liu, J. B. Liu, P. Wang, P. L. Wang, Y. Ban, J. Li, H. S. Sun, B. J. Liu, Q. M. Zhu, D. Y. Wang, S. S. Fang, Y. T. Gu, H. M. Hu, Y. S. Dai, G. S. Varner, Z. Wang, W. G. Li, Y. F. Liang, J. C. Chen, G. Rong, H. F. Chen, Jun Hu, W. F. Wang, K. J. Zhu, Han-Qing Zheng, C. L. Wei, L. Shang, M. G. Zhao, D. H. Zhang, Y. B. Chen, S. M. Li, H. S. Chen, X. Tang, S. S. Sun, B. A. Zhuang, C. X. Liu, Y. Yuan, F. C. Ma, M. H. Ye, J. W. Zhao, W. R. Zhao, C. Z. Yuan, H. Y. Zhang, Q. F. Dong, Hui Liu, K. L. He, X. D. Ruan, Z.J. Guo, G. S. Huang, Y. K. Heng, and X. Q. Li
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, law, Branching fraction, Perturbative QCD, Limit (mathematics), Atomic physics, Collider, law.invention
Abstract: The decays of J / ψ and ψ ( 2 S ) to n K S 0 Λ ¯ + c.c. are observed and measured for the first time, and the perturbative QCD “12%” rule is tested, based on 5.8 × 10 7 J / ψ and 1.4 × 10 7 ψ ( 2 S ) events collected with BESII detector at the Beijing Electron–Positron Collider. No obvious enhancement near n Λ ¯ threshold in J / ψ → n K S 0 Λ ¯ + c.c. is observed, and the upper limit on the branching ratio of J / ψ → K S 0 X , X → n Λ ¯ is determined.
Published: 2008
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6. Direct measurements of the branching fractions for inclusive K± and inclusive semileptonic decays of D+ and D0 mesons

Author: Z. G. Zhao, Z. Y. Ren, Fang Liu, X. T. Huang, Y. N. Guo, J. B. Liu, D. L. Shen, B. J. Liu, J. Li, S. S. Fang, X. Y. Shen, N. D. Qi, Z. Wang, F. Lu, S. Jin, Zhang Bo, D. H. Wei, Jun Hu, R. G. Ping, Yin Xu, S. D. Gu, K. J. Zhu, X. P. Xu, J. Z. Bai, Z. P. Zheng, J. Fang, X. M. Xia, Y. P. Chu, Dapeng Jin, B. A. Zhuang, C. X. Liu, J. C. Chen, Y. Yuan, H. H. Liu, J. W. Zhao, W. R. Zhao, H. M. Hu, J. H. Liu, L. Y. Shan, C. Z. Yuan, H. Y. Zhang, Q. F. Dong, D. X. Zhao, G. F. Xu, Z. A. Zhu, Y. C. Zhu, F. Liu, D. H. Zhang, Z. P. Mao, Hui Liu, H. L. Ma, N. Wu, Y. Weng, M. L. Yan, L. Y. Diao, W. D. Li, H. Q. Zhang, Z. J. Sun, Y. Zeng, Y. X. Yang, Z. P. Zhang, Y. S. Dai, G. Rong, H. F. Chen, H. Y. Sheng, H. X. Yang, J. W. Zhang, S. S. Sun, X. L. Li, Y. C. Lou, T. Hu, X. Y. Jiang, X. H. Mo, B. X. Zhang, Z. X. Zhang, R. G. Liu, G. W. Yu, Z. A. Liu, G. Li, L. S. Wang, J. B. Jiao, F. C. Ma, C. L. Wei, H. B. Liao, X. A. Zhuang, L. Shang, L. L. Ma, P. L. Wang, Y. Ban, Q. M. Ma, J. G. Lu, P. Wang, G. R. Lu, L. Zhou, B. S. Zou, H. B. Li, L. Z. Wang, Zheng Wang, C. L. Luo, Yongzhao Sun, Xiao Cai, Xiao-yan Li, Xiaomei Zhang, Jin Chen, M. H. Ye, Yiyun Zhang, D. Y. Wang, Y. F. Wang, M. He, G. L. Tong, J. P. Liu, Jian Liu, J. P. Zheng, S. X. Du, Q. M. Zhu, M. Wang, Y. F. Lai, C. S. Gao, W. G. Li, Y. T. Gu, Y. X. Ye, J. F. Qiu, Y. N. Gao, Y. B. Chen, J. Y. Zhang, X. B. Ji, Z. Y. Wang, M. Ablikim, R. Y. Li, L. L. Wang, X. X. Xie, H. S. Sun, Y. F. Liang, M. G. Zhao, S. M. Li, H.Q. Zheng, H. S. Chen, X. Tang, Y. S. Zhu, C. C. Zhang, Z. Y. Deng, P. P. Zhao, Qian Liu, H. Qin, Shaojie Zhang, X. Q. Li, Y. K. Heng, J. Hou, S. L. Zang, X. S. Jiang, J. Nie, C.D. Fu, H. X. Chen, K. L. He, and X. D. Ruan
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Meson, Branching (polymer chemistry)
Abstract: With singly-tagged D ¯ samples selected from the data collected at and around 3.773 GeV with the BESII detector at the BEPC collider, we have measured the branching fractions for the inclusive K ± decays of D + and D 0 mesons, which are BF ( D + → K − X ) = ( 24.7 ± 1.3 ± 1.2 ) % , BF ( D + → K + X ) = ( 6.1 ± 0.9 ± 0.4 ) % , BF ( D 0 → K − X ) = ( 57.8 ± 1.6 ± 3.2 ) % and BF ( D 0 → K + X ) = ( 3.5 ± 0.7 ± 0.3 ) % , respectively. We have also measured the branching fractions for the inclusive semileptonic decays of D + and D 0 mesons to be BF ( D + → e + X ) = ( 15.2 ± 0.9 ± 0.8 ) % and BF ( D 0 → e + X ) = ( 6.3 ± 0.7 ± 0.4 ) % . These yield the ratio of their partial widths to be Γ ( D + → e + X ) / Γ ( D 0 → e + X ) = 0.95 ± 0.12 ± 0.07 .
Published: 2007
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7. Measurements of the observed cross sections for exclusive light hadron production in e+e− annihilation at s=3.773 and 3.650 GeV

Author: J. B. Liu, Y. X. Yang, J. Fang, Z. A. Liu, G. Li, S. D. Gu, P. L. Wang, Y. Ban, X. L. Li, Y. C. Lou, L. L. Ma, P. Wang, X. Y. Jiang, Z. P. Mao, Dapeng Jin, G. F. Xu, Zheng Wang, Y. T. Gu, S. S. Sun, J. B. Jiao, G. R. Lu, Z. P. Zheng, L. Zhou, H. B. Li, Zhang Bo, H. Y. Sheng, D. Y. Wang, X. A. Zhuang, B. J. Liu, H. H. Liu, R. G. Ping, Q. M. Ma, W. G. Li, S. S. Fang, T. Hu, Z. Wang, Y. F. Wang, B. A. Zhuang, C. X. Liu, W. D. Li, Jin Chen, Q. M. Zhu, Y. Yuan, Y. Xu, Z. A. Zhu, Y. F. Lai, Han-Qing Zheng, S. M. Li, N. Wu, J. W. Zhao, J. P. Zheng, L. Y. Shan, Z. G. Zhao, W. R. Zhao, C. L. Wei, H. B. Liao, L. Shang, C. Z. Yuan, H. Y. Zhang, F. Lu, J. G. Lu, H. S. Chen, Q. F. Dong, Fang Liu, D. X. Zhao, X. Tang, F. C. Ma, M. He, G. L. Tong, Yongzhao Sun, Hui Liu, J. Hou, M. L. Yan, L. S. Wang, L. Y. Diao, M. Ablikim, K. L. He, X. D. Ruan, C. S. Gao, C. L. Luo, S. L. Zang, J. F. Qiu, X. S. Jiang, J. Nie, M. H. Ye, Y. B. Chen, R. Y. Li, Xiao Cai, C.D. Fu, J. H. Liu, H. X. Chen, L. L. Wang, Shaojie Zhang, Y. S. Dai, S. Jin, Jun Hu, K. J. Zhu, Z. Y. Ren, H. M. Hu, Y. N. Guo, X. T. Huang, X. H. Mo, B. X. Zhang, Z. X. Zhang, J. Li, X. P. Xu, X. M. Xia, Y. P. Chu, G. Rong, H. F. Chen, S. X. Du, Y. N. Gao, J. Y. Zhang, X. B. Ji, H. L. Ma, Y. Weng, M. Wang, P. P. Zhao, X. Y. Shen, Qian Liu, H. Qin, Y. S. Zhu, X. Q. Li, C. C. Zhang, Z. Y. Deng, Y. K. Heng, H. X. Yang, J. W. Zhang, G. W. Yu, B. S. Zou, Xiao-yan Li, J. P. Liu, Jian Liu, Y. C. Zhu, F. Liu, H. Q. Zhang, Z. J. Sun, Y. Zeng, Z. P. Zhang, X. X. Xie, J. C. Chen, D. H. Zhang, D. L. Shen, N. D. Qi, D. H. Wei, Z. Y. Wang, L. Z. Wang, H. S. Sun, Xiaomei Zhang, Yiyun Zhang, Y. F. Liang, Y. X. Ye, M. G. Zhao, J. Z. Bai, and R. G. Liu
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Electron–positron annihilation, Hadron, High Energy Physics::Experiment, Nuclear Experiment
Abstract: By analyzing the data sets of 17.3 pb−1 taken at s = 3.773 GeV and 6.5 pb−1 taken at s = 3.650 GeV with the BESII detector at the BEPC collider, we have measured the observed cross sections for 12 exclusive light hadron final states produced in e + e − annihilation at the two energy points. We have also set the upper limits on the observed cross sections and the branching fractions for ψ ( 3770 ) decay to these final states at 90% C.L.
Published: 2007
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8. Experimental studies of the π+π-π+π-π0, K+K-π+π-π0 and pp̄π+π-π0 final states produced in e+e- annihilation at $\sqrt{s}= 3.773$ and 3.650 GeV

Author: S. D. Gu, J. B. Jiao, Y. Xu, B. J. Liu, Yudan Wang, G. R. Lu, Z. A. Zhu, J. G. Lu, Zheng Wang, X. M. Xia, Han-Qing Zheng, Y. N. Guo, H. M. Hu, Y. T. Gu, J. C. Chen, T. Hu, XZ（蔡翔舟） Cai, W. D. Li, Xichao Ruan, X. L. Li, G. Li, J. Fang, Y. C. Zhu, H. Y. Sheng, S. X. Du, D. H. Wei, H. S. Chen, P. L. Wang, H. X. Yang, M. L. Yan, S. H. Zhang, N. D. Qi, X. Y. Shen, Huirun Chen, R. G. Ping, Lianyou Shan, L. S. Wang, Z. A. Liu, M. G. Zhao, J. W. Zhao, Y. Ban, J. P. Liu, Q. Liu, M. He, X. Tang, H. Y. Zhang, G. W. Yu, S. S. Sun, K. J. Zhu, X. H. Mo, Y. C. Lou, M. H. Ye, D. L. Shen, Z. Y. Ren, J. Z. Bai, Q. M. Zhu, X. Y. Zhang, L. L. Ma, F. C. Ma, R. G. Liu, J. B. Liu, J. Y. Zhang, L. P. Zhou, W. G. Li, C. X. Liu, L. L. Wang, Jin Chen, M. Z. Wang, S. S. Fang, H. S. Sun, X. N. Li, Z. P. Mao, Y. K. Heng, H. M. Liu, Shang Lunlin, J. H. Liu, G. F. Xu, S. Jin, Z. Zhao, J. F. Qiu, R. Y. Li, J. Nie, Cunfeng Wei, Q. F. Dong, J. Hou, Z. Y. Wang, J. W. Zhang, Fang Liu, Y. S. Dai, Xuai Zhuang, C. S. Gao, Jinxing Zheng, D. X. Zhao, C.D. Fu, B. Y. Zhang, X. X. Xie, Q. M. Ma, Y. Yuan, Y. S. Zhu, Z. Y. Deng, H. Q. Zhang, K. L. He, Z. P. Zhang, Zujian Wang, S. L. Zang, L. Y. Diao, Y. P. Chu, X. P. Xu, X. B. Ji, B.S. Zou, P. P. Zhao, X. T. Huang, G. Rong, B. X. Zhang, Z. P. Zheng, Jian Liu, G. L. Tong, M. Ablikim, B. A. Zhuang, X. Y. Jiang, Y. Zeng, F. Lu, Junhui Hu, Y. B. Chen, C. Z. Yuan, Y. Weng, P. Wang, Y. F. Lai, H. F. Chen, N. Wu, H. L. Ma, S. M. Li, Y. X. Yang, Y. Z. Sun, Z. X. Zhang, W. R. Zhao, F. Liu, Y. N. Gao, X. Q. Li, H. Qin, Z. J. Sun, H. B. Li, C. L. Luo, C. C. Zhang, H. H. Liu, J. C. Li, Hongbo Liao, Yiyun Zhang, Y. X. Ye, X. S. Jiang, Y. F. Liang, D. P. Jin, Dayong Wang, and D. H. Zhang
Subjects: Physics, Nuclear physics, Annihilation, Physics and Astronomy (miscellaneous), Statistical physics, Engineering (miscellaneous)
Abstract: We report measurements of the observed cross sections for e+e-→ωπ+π-, ωK+K-, ωpp, K+K-ρ0π0, K+K-ρ+π-+c.c., K*0K-π+π0+c.c., K*+K-π+π-+c.c., φπ+π-π0 and ΛΛπ0 at $\sqrt{s}= 3.773$ and 3.650 GeV. Upper limits (90% C.L.) are given for observed cross sections and for ψ(3770) decay branching fractions for production of these final states. These measurements are made by analyzing the data sets of 17.3 pb-1 collected at $\sqrt{s}=$3.773 GeV and 6.5 pb-1 collected at $\sqrt{s}=$3.650 GeV with the BES-II detector at the BEPC collider.
Published: 2007
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9. Measurements of the observed cross sections for e+e−→light hadrons at s=3.773 and 3.650 GeV

Author: Y. Zeng, X. S. Jiang, Y. B. Chen, G. F. Xu, Y. F. Lai, H. F. Chen, S. Jin, N. Wu, L. S. Wang, M. G. Zhao, S. S. Sun, W. G. Li, J. B. Jiao, Xichao Ruan, Y. C. Zhu, P. L. Wang, D. Y. Wang, R. Y. Li, H. Y. Zhang, X. Q. Li, W. D. Li, M. He, P. Wang, H. H. Liu, D. L. Shen, H. Y. Sheng, H. M. Liu, J. Y. Zhang, J. C. Li, J. Hou, Z. Y. Wang, H. Qin, C. X. Liu, H. Q. Zhang, Q. M. Zhu, K. L. He, Fang Liu, Xuai Zhuang, Y. K. Heng, Zheng Wang, Jin Chen, M. Z. Wang, Y. Xu, N. D. Qi, W. R. Zhao, Z. P. Zhang, P. P. Zhao, X. Y. Zhang, S. S. Fang, R. G. Liu, F. Lu, R. G. Ping, J. G. Lu, D. X. Zhao, C.D. Fu, B. Y. Zhang, J. B. Liu, S. D. Gu, J. C. Chen, H. S. Sun, X. N. Li, F. C. Ma, J. W. Zhao, F. Liu, Hongbo Liao, G. W. Yu, X. M. Xia, Cunfeng Wei, Q. F. Dong, T. Hu, XZ（蔡翔舟） Cai, X. L. Li, J. Fang, H. X. Yang, Junhui Hu, Zujian Wang, J. W. Zhang, X. T. Huang, J. H. Liu, J. F. Qiu, Yiyun Zhang, S. X. Du, Z. G. Zhao, L. Y. Diao, G. Rong, M. L. Yan, Y. N. Gao, Lianyou Shan, X. X. Xie, J. Nie, B. X. Zhang, Y. X. Ye, Jian Liu, J. P. Liu, Y. T. Gu, Y. C. Lou, Z. P. Zheng, H. S. Chen, C. Z. Yuan, Y. Weng, Z. J. Sun, L. L. Ma, Y. S. Dai, X. Tang, Z. Y. Ren, C. S. Gao, Y. X. Yang, D. H. Wei, Jinxing Zheng, Z. A. Liu, H. B. Li, C. L. Luo, G. L. Tong, S. L. Zang, Huirun Chen, Y. Ban, M. Ablikim, B. A. Zhuang, C. C. Zhang, X. Y. Jiang, S. H. Zhang, X. Y. Shen, Y. Z. Sun, X. H. Mo, Han-Qing Zheng, B. J. Liu, Yudan Wang, G. R. Lu, H. M. Hu, J. Z. Bai, M. H. Ye, Z. X. Zhang, Z. A. Zhu, C. P. Shen, L. L. Wang, L. P. Zhou, Z. P. Mao, Y. N. Guo, B.S. Zou, Q. M. Ma, K. J. Zhu, Y. Yuan, Y. S. Zhu, Q. Liu, Shang Lunlin, G. Li, Y. F. Liang, D. P. Jin, D. H. Zhang, Z. Y. Deng, Y. P. Chu, X. P. Xu, X. B. Ji, H. L. Ma, and S. M. Li
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Physics::Instrumentation and Detectors, Electron–positron annihilation, Hadron, Detector, law.invention, Nuclear physics, law, High Energy Physics::Experiment, Nuclear Experiment, Collider, Energy (signal processing)
Abstract: Using the data sets of 17.3 pb −1 collected at s = 3.773 GeV and 6.5 pb −1 collected at s = 3.650 GeV with the BESII detector at the BEPC collider, we have measured the observed cross sections for 18 exclusive light hadron final states produced in e + e − annihilation at the two energy points.
Published: 2007
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10. Measurements of ψ(2S) decays to octet baryon–antibaryon pairs

Author: J. Hou, T. Hu, Zhenyu Zhang, B. J. Liu, S. S. Fang, Z. Wang, S. L. Zang, X. S. Jiang, J. Nie, J. C. Chen, C.D. Fu, H. S. Sun, H. X. Chen, S. M. Li, X. A. Zhuang, H. X. Yang, J. W. Zhang, G. W. Yu, Y. F. Liang, Zhang Bo, H. S. Chen, Yin Xu, Z. Y. Ren, Y. C. Zhu, F. Liu, D. H. Zhang, X. Y. Zhang, X. Tang, B. S. Zou, M. He, G. L. Tong, Xiao-yan Li, Z. A. Liu, G. Li, Dapeng Jin, Y. N. Guo, M. Wang, Z. A. Zhu, Shaojie Zhang, J. P. Liu, R. G. Liu, S. S. Sun, P. L. Wang, Y. Ban, Jian Liu, H. Q. Zhang, Z. J. Sun, Y. Zeng, N. Wu, M. G. Zhao, X. Q. Li, L. Z. Wang, Y. X. Yang, Jin Chen, X. L. Li, H. Y. Sheng, S. D. Gu, Yiyun Zhang, F. Lu, Y. C. Lou, G. F. Xu, F. A. Harris, Yulin Gao, C. L. Wei, L. Shang, Y. X. Ye, M. Ablikim, B. A. Zhuang, C. X. Liu, Y. T. Gu, Z. G. Zhao, X. T. Huang, J. B. Jiao, R. Y. Li, Z. P. Zheng, J. B. Liu, X. Y. Jiang, L. Y. Shan, D. L. Shen, Y. Yuan, L. L. Wang, H. H. Liu, L. S. Wang, X. P. Xu, X. M. Xia, Y. P. Chu, N. D. Qi, Q. M. Ma, D. H. Wei, J. Fang, Fang Liu, G. S. Varner, C. P. Shen, J. Z. Bai, J. Li, F. C. Ma, Y. F. Wang, P. Wang, H.Q. Zheng, J. P. Zheng, H. L. Ma, Y. F. Lai, H. B. Liao, Y. Weng, C. L. Luo, H. M. Hu, D. Y. Wang, X. X. Xie, J. G. Lu, Z. Y. Wang, Zhentao Zhang, M. H. Ye, W. G. Li, Yongzhao Sun, Xiao Cai, R. G. Ping, Z. P. Mao, L. L. Ma, D. X. Zhao, G. Rong, H. F. Chen, Zheng Wang, G. R. Lu, L. Zhou, W. D. Li, M. L. Yan, L. Y. Diao, H. B. Li, S. X. Du, Jun Hu, C. S. Gao, S.L. Olsen, J. Y. Zhang, Y. K. Heng, J. F. Qiu, X. Y. Shen, Q. M. Zhu, X. B. Ji, X. H. Mo, B. X. Zhang, Y. B. Chen, J. H. Liu, Y. S. Dai, S. Jin, Y. S. Zhu, K. J. Zhu, C. C. Zhang, Z. Y. Deng, P. P. Zhao, Qian Liu, H. Qin, U. Wiedner, J. W. Zhao, W. R. Zhao, C. Z. Yuan, H. Y. Zhang, Q. F. Dong, Hui Liu, Z.J. Guo, K. L. He, and X. D. Ruan
Subjects: Baryon, Physics, Nuclear physics, Nuclear and High Energy Physics, Angular distribution, Positron, Octet, Electron
Abstract: With a sample of 14 × 10 6 ψ ( 2 S ) events collected by the BESII detector at the Beijing Electron Positron Collider (BEPC), the decay channels ψ ( 2 S ) → B 8 B ¯ 8 ( p p ¯ , Λ Λ ¯ , Σ 0 Σ ¯ 0 , Ξ − Ξ ¯ + ) are measured, and their branching ratios are determined to be ( 3.36 ± 0.09 ± 0.25 ) × 10 −4 , ( 3.39 ± 0.20 ± 0.32 ) × 10 −4 , ( 2.35 ± 0.36 ± 0.32 ) × 10 −4 , ( 3.03 ± 0.40 ± 0.32 ) × 10 −4 , respectively. In the decay ψ ( 2 S ) → p p ¯ , the angular distribution parameter α is determined to be 0.85 ± 0.24 ± 0.04 .
Published: 2007
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11. Partial wave analyses of J/ψ→γπ+π− and γπ0π0

Author: S. D. Gu, L. P. Zhou, Yingchun Zhu, J. F. Qiu, Z. P. Mao, Q. M. Zhu, Y. N. Guo, G. S. Varner, Y. X. Yang, B. J. Liu, Yudan Wang, J. B. Jiao, Q. Liu, M. Z. Wang, W. G. Li, Zheng Wang, S. X. Du, M. L. Yan, X. Tang, Xuan Zhang, D. Y. Wang, Zhenyu Zhang, H. S. Sun, X. N. Li, Y. Q. Guo, Haiping Peng, X. S. Jiang, Y. B. Chen, Z. A. Zhu, S. L. Zang, J. C. Chen, J. H. Liu, Y. C. Zhu, Xingzhu Cui, H. B. Li, Y. F. Lai, H. F. Chen, W. F. Wang, H. M. Hu, Z. Y. Yi, J. Fang, S.L. Olsen, C. L. Luo, C. P. Shen, H. Y. Zhang, P. Wang, J. Nie, Y. P. Chu, X. P. Xu, X. B. Ji, W. D. Li, Y. F. Liang, P. L. Wang, H. X. Yang, D. P. Jin, N. Wu, Haiwen Liu, F. A. Harris, G. S. Huang, S. S. Sun, Y. Z. Sun, J. G. Lu, C. C. Zhang, X. B. Ma, Xuai Zhuang, J. Y. Zhang, D. H. Zhang, Gongru Lu, Y. S. Dai, F. Lu, H. S. Chen, Yu Zeng, T. Hu, XZ（蔡翔舟） Cai, H. Y. Sheng, J. W. Zhao, C. S. Gao, X. L. Li, R. Y. Li, Y. C. Lou, Z. Y. Ren, Jinxing Zheng, S. P. Chi, Z. Q. Tan, G. W. Yu, Y. K. Heng, S. H. Zhang, X. Y. Shen, Fang Liu, X. Q. Li, Q. M. Ma, Cunfeng Wei, N. D. Qi, Q. F. Dong, Ning Zhou, K. J. Zhu, J. M. Yuan, X. X. Xie, Lianyou Shan, R. G. Liu, W. R. Zhao, Xunchao Zhang, J. B. Liu, C. Z. Yuan, F. Liu, Z. G. Zhao, Zhe Wang, R. G. Ping, L. L. Ma, D. X. Zhao, B. Y. Zhang, J. W. Zhang, Y.L. Li, H. Qin, Z. A. Liu, Hangxu Li, Y. Yuan, Y. S. Zhu, Shang Lunlin, G. Li, Jin Chen, Z. J. Sun, S. S. Fang, J. P. Liu, C. D. Fu, G. F. Xu, Y. Ban, Z. Y. Deng, H. H. Liu, L. S. Wang, M. G. Zhao, J. C. Li, Z.J. Guo, Yi Jin, H. L. Ma, S. M. Li, Hongbo Liao, S. Jin, Z. Y. Wang, J. Z. Bai, Yiyun Zhang, Y. Zeng, Y. X. Ye, K. L. He, H.Q. Zheng, Xingtao Huang, X. H. Mo, M. H. Ye, M. He, L. L. Wang, D. L. Shen, C. X. Liu, Y. T. Gu, X. M. Xia, D. H. Wei, Z. P. Zheng, G. L. Tong, B. A. Zhuang, X. Y. Jiang, Jianwei Sun, B. X. Zhang, B.S. Zou, J. G. Bian, H. Q. Zhang, Zujian Wang, L. Y. Diao, P. P. Zhao, M. Ablikim, G. Rong, Yin Xu, Y.N. Gao, and F. C. Ma
Subjects: Physics, Nuclear and High Energy Physics, Amplitude, Branching fraction, Atomic physics, Spin (physics)
Abstract: Results are presented on J / ψ radiative decays to π + π − and π 0 π 0 based on a sample of 58M J / ψ events taken with the BES II detector. Partial wave analyses are carried out using the relativistic covariant tensor amplitude method in the 1.0 to 2.3 GeV / c 2 π π mass range. There are conspicuous peaks due to the f 2 ( 1270 ) and two 0 + + states in the 1.45 and 1.75 GeV / c 2 mass regions. The first 0 + + state has a mass of 1466 ± 6 ± 20 MeV / c 2 , a width of 108 −11 +14 ± 25 MeV / c 2 , and a branching fraction B ( J / ψ → γ f 0 ( 1500 ) → γ π + π − ) = ( 0.67 ± 0.02 ± 0.30 ) × 10 −4 . Spin 0 is strongly preferred over spin 2. The second 0 + + state peaks at 1765 −3 +4 ± 13 MeV / c 2 with a width of 145 ± 8 ± 69 MeV / c 2 . If this 0 + + is interpreted as coming from f 0 ( 1710 ) , the ratio of its branching fractions to ππ and K K ¯ is 0.41 −0.17 +0.11 .
Published: 2006
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12. Measurements of χcJ→K+K−K+K− decays

Author: H. Q. Zhang, Z. P. Zhang, Zujian Wang, L. Y. Diao, B.S. Zou, W. G. Li, J. G. Lu, P. Wang, Q. Liu, D. Y. Wang, W. D. Li, B. J. Liu, Yudan Wang, Yingchun Zhu, G. R. Lu, H. M. Liu, S. D. Gu, T. Hu, XZ（蔡翔舟） Cai, X. L. Li, Yu Zeng, Z. P. Zheng, L. P. Zhou, Z. A. Zhu, Z. P. Mao, F. Lu, Z. Y. Yi, Q. M. Zhu, Xingzhu Cui, Y. C. Lou, S. X. Du, Y. C. Zhu, H. X. Yang, G. L. Tong, S. L. Zang, G. S. Varner, M. L. Yan, C. P. Shen, H. F. Chen, M. Ablikim, B. A. Zhuang, M. Z. Wang, Zheng Wang, S.L. Olsen, X. Y. Jiang, J. W. Zhao, J. P. Liu, C. Z. Yuan, X. X. Xie, S. S. Sun, Zhe Wang, P. L. Wang, S. P. Chi, G. W. Yu, Yi Jin, H. S. Sun, Jianwei Sun, X. N. Li, X. B. Ma, Xuai Zhuang, Hongbo Liao, H. L. Ma, Z. Y. Ren, S. M. Li, J. H. Liu, J. C. Chen, K. J. Zhu, J. M. Yuan, Q. M. Ma, Yiyun Zhang, Z. Y. Wang, J. Nie, Y. Yuan, Y. S. Zhu, Y. X. Yang, Y.L. Li, Y. X. Ye, Shang Lunlin, Y. S. Dai, J. Fang, X. S. Jiang, F. A. Harris, H. M. Hu, Y. N. Guo, C. S. Gao, G. Li, Jinxing Zheng, B. X. Zhang, S. H. Zhang, X. Y. Shen, H.Q. Zheng, H. Y. Zhang, Y. Z. Sun, C. D. Fu, X. Tang, Fang Liu, Jin Chen, Z. Y. Deng, G. S. Huang, F. C. Ma, S. S. Fang, Y. F. Liang, W. R. Zhao, F. Liu, D. P. Jin, J. Y. Zhang, D. X. Zhao, B. Y. Zhang, Hangxu Li, Y. N. Gao, D. H. Zhang, Y. P. Chu, X. P. Xu, X. B. Ji, J. F. Qiu, Y. K. Heng, Xunchao Zhang, L. S. Wang, M. G. Zhao, Z.J. Guo, R. Y. Li, Cunfeng Wei, Q. F. Dong, Ning Zhou, K. L. He, J. W. Zhang, H. S. Chen, N. Wu, Y. Zeng, Y. Q. Guo, Y. B. Chen, L. X. Shan, Y. F. Lai, W. F. Wang, X. Y. Zhang, R. G. Liu, J. B. Liu, J. B. Jiao, Yin Xu, H. P. Peng, P. P. Zhao, X. T. Huang, G. Rong, J. G. Bian, Huirun Chen, X. H. Mo, M. H. Ye, L. L. Wang, Z. G. Zhao, Y. T. Gu, D. H. Wei, Z. J. Sun, H. Y. Sheng, Z. Q. Tan, H. H. Liu, J. C. Li, G. F. Xu, S. Jin, N. D. Qi, R. G. Ping, L. L. Ma, Z. A. Liu, Y. Ban, H. B. Li, C. L. Luo, M. He, D. L. Shen, C. C. Zhang, C. X. Liu, J. Z. Bai, Ulrich Wiedner, X. M. Xia, X. Q. Li, and H. Qin
Subjects: Physics, Nuclear and High Energy Physics, Theoretical physics, Analytical chemistry
Abstract: Using 14M psi(2S) events taken with the BESII detector, chi(cJ) -> 2(K+K-) decays are studied. For the four-kaon final state, the branching fractions are B(chi(c0,1,2) ->.2(K+K-)) = (3.48 +/- 0.23 +/- 0.47) x 10(-3), (0.70 +/- 0.13 +/- 0.10) x 10(-3), and (2.17 +/- 0.20 +/- 0.31) x 10(-3). For the phi K+K- final state, the branching fractions, which are measured for the first time, are B(chi(c0,1,2) -> phi K+K-) = (1.03 +/- 0.22 +/- 0.15) x 10(-3), (0.46 +/- 0.16 +/- 0.06) x 10(-3), and (1.67 +/- 0.26 +/- 0.24) x 10(-4). For the phi phi final state, B(chi(c0,2) -> phi phi) = (0.94 +/- 0.21 +/- 0.13) x 10(-3) and (1.70 +/- 0.30 +/- 0.25) x 10(-3).
Published: 2006
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13. Anomalous line shape of the cross section for e{+}e{-}--hadrons in the center-of-mass energy region between 3.650 and 3.872 GeV

Author: M, Ablikim, J Z, Bai, Y, Ban, X, Cai, H F, Chen, H S, Chen, H X, Chen, J C, Chen, Jin, Chen, Y B, Chen, Y P, Chu, Y S, Dai, L Y, Diao, Z Y, Deng, Q F, Dong, S X, Du, J, Fang, S S, Fang, C D, Fu, C S, Gao, Y N, Gao, S D, Gu, Y T, Gu, Y N, Guo, K L, He, M, He, Y K, Heng, J, Hou, H M, Hu, J H, Hu, T, Hu, G S, Huang, X T, Huang, X B, Ji, X S, Jiang, X Y, Jiang, J B, Jiao, D P, Jin, S, Jin, Y F, Lai, G, Li, H B, Li, J, Li, R Y, Li, S M, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, Y F, Liang, H B, Liao, B J, Liu, C X, Liu, F, Liu, Fang, Liu, H H, Liu, H M, Liu, J, Liu, J B, Liu, J P, Liu, Jian, Liu, Q, Liu, R G, Liu, Z A, Liu, Y C, Lou, F, Lu, G R, Lu, J G, Lu, C L, Luo, F C, Ma, H L, Ma, L L, Ma, Q M, Ma, Z P, Mao, X H, Mo, J, Nie, R G, Ping, N D, Qi, H, Qin, J F, Qiu, Z Y, Ren, G, Rong, X D, Ruan, L Y, Shan, L, Shang, D L, Shen, X Y, Shen, H Y, Sheng, H S, Sun, S S, Sun, Y Z, Sun, Z J, Sun, X, Tang, G L, Tong, D Y, Wang, L, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, W F, Wang, Y F, Wang, Z, Wang, Z Y, Wang, Zheng, Wang, C L, Wei, D H, Wei, Y, Weng, N, Wu, X M, Xia, X X, Xie, G F, Xu, X P, Xu, Y, Xu, M L, Yan, H X, Yang, Y X, Yang, M H, Ye, Y X, Ye, G W, Yu, C Z, Yuan, Y, Yuan, S L, Zang, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H Q, Zhang, H Y, Zhang, J W, Zhang, J Y, Zhang, S H, Zhang, X Y, Zhang, Yiyun, Zhang, Z X, Zhang, Z P, Zhang, D X, Zhao, J W, Zhao, M G, Zhao, P P, Zhao, W R, Zhao, Z G, Zhao, H Q, Zheng, J P, Zheng, Z P, Zheng, L, Zhou, K J, Zhu, Q M, Zhu, Y C, Zhu, Y S, Zhu, Z A, Zhu, B A, Zhuang, X A, Zhuang, and B S, Zou
Abstract: We observe an obvious anomalous line shape of the e;{+}e;{-}--hadrons total cross sections in the energy region between 3.700 and 3.872 GeV. It is inconsistent with the explanation for only one simple psi(3770) resonance with a statistical significance of 7sigma. The anomalous line shape may be explained by two possible enhancements of the inclusive hadron production near the center-of-mass energies of 3.764 and 3.779 GeV, indicating that either there is likely a new structure in addition to the psi(3770) resonance around 3.773 GeV, or there are some physics effects reflecting the DD[over ] production dynamics.
Published: 2008

14. Search for the Invisible Decay ofJ/ψinψ(2S)→π+π−J/ψ

Author: M. Ablikim, J. Z. Bai, Y. Ban, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, Y. P. Chu, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, S. D. Gu, Y. T. Gu, Y. N. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, J. Hou, H. M. Hu, J. H. Hu, T. Hu, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Y. Jin, Y. F. Lai, G. Li, H. B. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Jian Liu, Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma, Q. M. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, X. D. Ruan, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang, L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zheng Wang, C. L. Wei, D. H. Wei, U. Wiedner, Y. Weng, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, G. W. Yu, C. Z. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. Y. Zhang, Yiyun Zhang, Z. X. Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, and B. S. Zou
Subjects: Physics, Particle decay, Pair production, Pi, Analytical chemistry, General Physics and Astronomy, High Energy Physics::Experiment
Abstract: Using {psi}(2S){yields}{pi}{sup +}{pi}{sup -}J/{psi} events in a sample of 14.0x10{sup 6} {psi}(2S) decays collected with the BES-II detector, a search for the decay of the J/{psi} to invisible final states is performed. No signal is found, and an upper limit at the 90% confidence level is determined to be 1.2x10{sup -2} for the ratio (B(J/{psi}{yields}invisible)/B(J/{psi}{yields}{mu}{sup +}{mu}{sup -})). This is the first search for J/{psi} decays to invisible final states.
Published: 2008
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15. Search for the decaysJ/ψ→γρϕandJ/ψ→γρω

Author: Q. Liu, Y. P. Chu, X. P. Xu, X. B. Ji, Shang Lunlin, H. H. Liu, G. Li, Z. J. Guo, C. D. Fu, J. C. Li, Z. Y. Deng, X. Q. Li, B. J. Liu, Yudan Wang, T. Hu, XZ（蔡翔舟） Cai, X. L. Li, K. J. Zhu, G. R. Lu, H. S. Chen, Jin Chen, Y. T. Gu, Z. A. Zhu, Lianyou Shan, S. D. Gu, X. Tang, S. S. Fang, Y. C. Zhu, P. L. Wang, Z. P. Zheng, P. Wang, H. Qin, C. P. Shen, W. G. Li, X. Y. Zhang, R. G. Liu, J. B. Liu, H. B. Li, W. R. Zhao, F. A. Harris, C. L. Luo, F. Liu, J. W. Zhao, C. C. Zhang, Z. P. Zhang, J. Hou, D. Y. Wang, G. W. Yu, L. S. Wang, M. G. Zhao, Y. N. Gao, F. Lu, F. C. Ma, D. H. Wei, Fang Liu, Q. M. Zhu, Q. M. Ma, B.S. Zou, G. S. Varner, S. L. Zang, S. H. Zhang, H. Y. Zhang, K. L. He, X. Y. Shen, J. F. Qiu, Y. C. Xu, Y. Yuan, Y. S. Zhu, Z. G. Zhao, Junhui Hu, Hongbo Liao, G. S. Huang, Y. X. Yang, J. B. Jiao, H. M. Liu, D. X. Zhao, B. Y. Zhang, M. Z. Wang, H. Q. Zhang, G. L. Tong, J. Y. Zhang, C. Z. Yuan, Yiyun Zhang, Y. C. Lou, H. S. Sun, L. L. Ma, X. N. Li, Y. Weng, M. Ablikim, B. A. Zhuang, Miao He, Y. Z. Sun, X. X. Xie, Z. A. Liu, Y. X. Ye, Zujian Wang, L. P. Zhou, Y. K. Heng, W. D. Li, X. S. Jiang, X. Y. Jiang, Zheng Wang, Y. Zeng, L. Y. Diao, Z. P. Mao, Han-Qing Zheng, Z. X. Zhang, S. S. Sun, H. M. Hu, J. Nie, Y. Ban, H. L. Ma, S. L. Olsen, Y. B. Chen, J. C. Chen, Xuai Zhuang, S. M. Li, Y. N. Guo, Huirun Chen, Z. Y. Wang, X. H. Mo, Y. F. Lai, M. H. Ye, L. L. Wang, H. F. Chen, J. Fang, Y. F. Liang, D. P. Jin, J. Z. Bai, D. H. Zhang, S. X. Du, N. Wu, Y. S. Dai, M. L. Yan, Xichao Ruan, C. S. Gao, H. X. Yang, Jinxing Zheng, H. Y. Sheng, N. D. Qi, J. P. Liu, R. G. Ping, Z. Y. Ren, B. X. Zhang, X. M. Xia, Z. J. Sun, G. F. Xu, S. Jin, D. L. Shen, C. X. Liu, Jian Liu, R. Y. Li, Cunfeng Wei, Q. F. Dong, J. W. Zhang, P. P. Zhao, X. T. Huang, G. Rong, and J. G. Lu
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Omega
Abstract: Using $58\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $J/\ensuremath{\psi}$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider, the decays $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\phi}\ensuremath{\rho}$ and $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\omega}\ensuremath{\rho}$ are searched for, and upper limits on their branching fractions are reported at the 90% C.L. No clear structures are observed in the $\ensuremath{\gamma}\ensuremath{\rho}$, $\ensuremath{\gamma}\ensuremath{\phi}$, or $\ensuremath{\rho}\ensuremath{\phi}$ mass spectra for $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\phi}\ensuremath{\rho}$ nor in the $\ensuremath{\gamma}\ensuremath{\rho}$, $\ensuremath{\gamma}\ensuremath{\omega}$, or $\ensuremath{\rho}\ensuremath{\omega}$ mass spectra for $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\omega}\ensuremath{\rho}$.
Published: 2008
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16. Direct measurements of the non-DD¯cross sectionσψ(3770)→non−DD¯atEcm=3.773 GeVand the branching fraction forψ(3770)→non−DD¯

Author: Shang Lunlin, G. Li, B.S. Zou, F. Lu, R. Y. Li, C. D. Fu, Zheng Wang, J. C. Chen, H. Y. Zhang, G. S. Huang, J. Y. Zhang, S. D. Gu, Z. Y. Deng, Y. K. Heng, J. Fang, Y. C. Zhu, Q. Liu, H. H. Liu, Z. P. Zheng, Xichao Ruan, Junhui Hu, Cunfeng Wei, Q. F. Dong, J. W. Zhang, P. L. Wang, H. Q. Zhang, Miao He, W. D. Li, J. C. Li, W. R. Zhao, H. Y. Sheng, Huirun Chen, L. S. Wang, M. G. Zhao, H. X. Yang, G. L. Tong, F. Liu, M. Ablikim, B. A. Zhuang, L. P. Zhou, X. Y. Jiang, J. G. Lu, C. Z. Yuan, Y. Weng, Z. P. Mao, N. D. Qi, Zujian Wang, Y. N. Gao, J. Nie, R. G. Ping, Z. P. Zhang, Y. S. Dai, L. Y. Diao, S. H. Zhang, X. Y. Shen, K. L. He, Hongbo Liao, J. W. Zhao, J. P. Liu, Y. P. Chu, S. X. Du, M. L. Yan, X. P. Xu, X. B. Ji, F. C. Ma, X. H. Mo, Y. C. Lou, G. W. Yu, P. Wang, C. S. Gao, Jinxing Zheng, M. H. Ye, B. J. Liu, Z. Y. Ren, Yiyun Zhang, Jin Chen, Yudan Wang, L. L. Wang, G. R. Lu, D. L. Shen, W. G. Li, Y. X. Ye, S. S. Fang, S. S. Sun, X. Y. Zhang, R. G. Liu, C. X. Liu, Y. Zeng, Han-Qing Zheng, J. F. Qiu, Xuai Zhuang, Z. A. Zhu, X. S. Jiang, L. L. Ma, Q. M. Ma, D. Y. Wang, K. J. Zhu, J. B. Liu, H. L. Ma, Z. A. Liu, S. M. Li, H. M. Hu, H. M. Liu, Y. Yuan, Y. S. Zhu, Y. Ban, J. B. Jiao, Y. X. Yang, Y. T. Gu, Z. Y. Wang, Q. M. Zhu, Y. N. Guo, J. Z. Bai, Y. B. Chen, H. S. Chen, Y. C. Xu, X. M. Xia, D. H. Wei, Y. Z. Sun, M. Z. Wang, X. Tang, Y. F. Lai, H. S. Sun, X. N. Li, X. Q. Li, H. F. Chen, Z. X. Zhang, S. L. Zang, W. F. Wang, J. Hou, Fang Liu, G. F. Xu, S. Jin, H. Qin, X. X. Xie, D. X. Zhao, B. Y. Zhang, Y. F. Liang, D. P. Jin, D. H. Zhang, N. Wu, T. Hu, XZ（蔡翔舟） Cai, X. L. Li, Lianyou Shan, B. X. Zhang, H. B. Li, C. L. Luo, C. C. Zhang, Jian Liu, Z. J. Sun, P. P. Zhao, X. T. Huang, and G. Rong
Subjects: Physics, Nuclear and High Energy Physics, Pair production, Meson, law, Branching fraction, Electron–positron annihilation, Sigma, Atomic physics, Collider, Energy (signal processing), Particle identification, law.invention
Abstract: By analyzing the data collected at the center-of-mass energy E{sub cm}=3.773 GeV and below the DD meson pair production threshold with the BES-II detector at the BEPC Collider, we directly measured the observed non-DD cross section of {psi}(3770) decay to be {sigma}{sub {psi}}{sub (3770){yields}}{sub non-DD}{sup obs}=(0.95{+-}0.35{+-}0.29) nb at E{sub cm}=3.773 GeV, and the branching fraction BF[{psi}(3770){yields}non-DD]=(13.4{+-}5.0{+-}3.6)% for inclusive non-DD decay of {psi}(3770). We also determined the cross section for DD meson pair production to be {sigma}{sub DD}{sup obs}=(6.12{+-}0.37{+-}0.23) nb at E{sub cm}=3.773 GeV.
Published: 2007
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17. Search for theC-parity violating processJ/ψ→γγviaψ(2S)→π+π−J/ψ

Author: M. Ablikim, J. Z. Bai, Y. Ban, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, Y. P. Chu, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, S. D. Gu, Y. T. Gu, Y. N. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, J. Hou, H. M. Hu, J. H. Hu, T. Hu, G. S. Huang, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Y. F. Lai, G. Li, H. B. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Jian Liu, Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma, Q. M. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, X. D. Ruan, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang, L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zheng Wang, C. L. Wei, D. H. Wei, U. Wiedner, Y. Weng, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, G. W. Yu, C. Z. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. Y. Zhang, Yiyun Zhang, Z. X. Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, and B. S. Zou
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Hadron, Quarkonium, Particle identification, Crystallography, Pion, High Energy Physics::Experiment, Dimensionless quantity
Abstract: Using 14.0x10{sup 6}{psi}(2S) events collected with the BES-II detector, the C-parity violating process J/{psi}{yields}{gamma}{gamma} via {psi}(2S){yields}{pi}{sup +}{pi}{sup -}J/{psi} is studied. We determine a new upper limit for the J/{psi}{yields}{gamma}{gamma} branching ratio of B(J/{psi}{yields}{gamma}{gamma})
Published: 2007
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18. Measurements ofJ/ψandψ(2S)decays intoΛΛ¯π0andΛΛ¯η

Author: S. D. Gu, G. S. Varner, Huirun Chen, H. B. Li, S. S. Sun, C. L. Luo, L. L. Ma, Q. M. Zhu, C. C. Zhang, L. S. Wang, M. G. Zhao, Z. A. Liu, Y. C. Xu, B.S. Zou, S. L. Olsen, Z. Y. Wang, X. H. Mo, S. L. Zang, M. H. Ye, Y. C. Lou, Y. Ban, W. G. Li, M. Z. Wang, L. L. Wang, H. S. Sun, X. S. Jiang, G. F. Xu, S. Jin, D. Y. Wang, X. N. Li, Jian Liu, H. Y. Zhang, G. S. Huang, K. L. He, X. Q. Li, H. H. Liu, H. Q. Zhang, J. C. Li, S. H. Zhang, X. Y. Shen, J. Z. Bai, Y. T. Gu, H. M. Liu, X. Y. Zhang, R. G. Liu, Shang Lunlin, J. Y. Zhang, J. B. Liu, Z. P. Zheng, Y. C. Zhu, Xichao Ruan, G. Li, Jin Chen, Xuai Zhuang, P. L. Wang, J. Nie, Y. K. Heng, Han-Qing Zheng, Zujian Wang, Zheng Wang, C. D. Fu, D. H. Wei, B. J. Liu, L. Y. Diao, H. Y. Sheng, Z. Y. Deng, P. Wang, J. Hou, H. M. Hu, Y. X. Yang, Yudan Wang, S. S. Fang, J. B. Jiao, Y. S. Dai, C. S. Gao, G. R. Lu, H. X. Yang, P. P. Zhao, Fang Liu, J. C. Chen, H. Qin, N. D. Qi, F. A. Harris, Z. P. Zhang, Z. G. Zhao, Jinxing Zheng, D. L. Shen, Z. A. Zhu, G. L. Tong, R. G. Ping, F. C. Ma, J. Fang, D. X. Zhao, X. T. Huang, Z. J. Guo, G. Rong, B. Y. Zhang, C. X. Liu, Y. P. Chu, X. P. Xu, X. B. Ji, M. Ablikim, B. A. Zhuang, Z. J. Sun, X. Y. Jiang, J. G. Lu, Y. Z. Sun, Miao He, Y. F. Liang, C. P. Shen, J. F. Qiu, D. P. Jin, Y. N. Guo, T. Hu, H. S. Chen, XZ（蔡翔舟） Cai, J. P. Liu, Q. M. Ma, L. P. Zhou, D. H. Zhang, K. J. Zhu, X. L. Li, X. X. Xie, Y. Yuan, Y. S. Zhu, Z. Y. Ren, Z. P. Mao, X. M. Xia, Lianyou Shan, Q. Liu, Z. X. Zhang, F. Lu, Hongbo Liao, B. X. Zhang, W. R. Zhao, Yiyun Zhang, F. Liu, Y. X. Ye, Y. N. Gao, R. Y. Li, Cunfeng Wei, Q. F. Dong, J. W. Zhang, Junhui Hu, S. X. Du, H. L. Ma, S. M. Li, M. L. Yan, C. Z. Yuan, Y. Weng, X. Tang, W. D. Li, J. W. Zhao, G. W. Yu, Y. Zeng, Y. B. Chen, Y. F. Lai, H. F. Chen, W. F. Wang, and N. Wu
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics
Published: 2007
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19. Search for the invisible decay of J/psi in psi(2S) --pi(+)pi(-) J/psi

Author: M, Ablikim, J Z, Bai, Y, Ban, X, Cai, H F, Chen, H S, Chen, H X, Chen, J C, Chen, Jin, Chen, Y B, Chen, Y P, Chu, Y S, Dai, L Y, Diao, Z Y, Deng, Q F, Dong, S X, Du, J, Fang, S S, Fang, C D, Fu, C S, Gao, Y N, Gao, S D, Gu, Y T, Gu, Y N, Guo, Z J, Guo, F A, Harris, K L, He, M, He, Y K, Heng, J, Hou, H M, Hu, J H, Hu, T, Hu, X T, Huang, X B, Ji, X S, Jiang, X Y, Jiang, J B, Jiao, D P, Jin, S, Jin, Y, Jin, Y F, Lai, G, Li, H B, Li, J, Li, R Y, Li, S M, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, Y F, Liang, H B, Liao, B J, Liu, C X, Liu, F, Liu, Fang, Liu, H H, Liu, H M, Liu, J, Liu, J B, Liu, J P, Liu, Jian, Liu, Q, Liu, R G, Liu, Z A, Liu, Y C, Lou, F, Lu, G R, Lu, J G, Lu, C L, Luo, F C, Ma, H L, Ma, L L, Ma, Q M, Ma, Z P, Mao, X H, Mo, J, Nie, S L, Olsen, R G, Ping, N D, Qi, H, Qin, J F, Qiu, Z Y, Ren, G, Rong, X D, Ruan, L Y, Shan, L, Shang, C P, Shen, D L, Shen, X Y, Shen, H Y, Sheng, H S, Sun, S S, Sun, Y Z, Sun, Z J, Sun, X, Tang, G L, Tong, G S, Varner, D Y, Wang, L, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Y F, Wang, Z, Wang, Z Y, Wang, Zheng, Wang, C L, Wei, D H, Wei, U, Wiedner, Y, Weng, N, Wu, X M, Xia, X X, Xie, G F, Xu, X P, Xu, Y, Xu, M L, Yan, H X, Yang, Y X, Yang, M H, Ye, Y X, Ye, G W, Yu, C Z, Yuan, Y, Yuan, S L, Zang, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H Q, Zhang, H Y, Zhang, J W, Zhang, J Y, Zhang, S H, Zhang, X Y, Zhang, Yiyun, Zhang, Z X, Zhang, Z P, Zhang, D X, Zhao, J W, Zhao, M G, Zhao, P P, Zhao, W R, Zhao, Z G, Zhao, H Q, Zheng, J P, Zheng, Z P, Zheng, L, Zhou, K J, Zhu, Q M, Zhu, Y C, Zhu, Y S, Zhu, Z A, Zhu, B A, Zhuang, X A, Zhuang, and B S, Zou
Abstract: Using psi(2S) --pi(+)pi(-) J/psi events in a sample of 14.0 x 10(6) psi(2S) decays collected with the BES-II detector, a search for the decay of the J/psi to invisible final states is performed. No signal is found, and an upper limit at the 90% confidence level is determined to be 1.2 x 10(-2) for the ratio B(J/psi --invisible)/B(J/psi--mu(+)mu(-)). This is the first search for J/psi decays to invisible final states.
Published: 2007

20. Measurement ofψ(2S)Radiative Decays

Author: M. Ablikim, J. Z. Bai, Y. Ban, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, Y. P. Chu, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, S. D. Gu, Y. T. Gu, Y. N. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, J. Hou, H. M. Hu, J. H. Hu, T. Hu, G. S. Huang, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Y. F. Lai, G. Li, H. B. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Jian Liu Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma, Q. M. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, X. D. Ruan, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang, L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zheng Wang, C. L. Wei, D. H. Wei, Y. Weng, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, G. W. Yu, C. Z. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. Y. Zhang, Yiyun Zhang, Z. X. Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, and B. S. Zou
Subjects: Physics, Crystallography, Particle decay, Particle physics, Pair production, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, General Physics and Astronomy, Omega, Dimensionless quantity
Abstract: Using 14x10{sup 6} {psi}(2S) events accumulated at the BESII detector, we report first measurements of branching fractions or upper limits for {psi}(2S) decays into {gamma}pp, {gamma}2({pi}{sup +}{pi}{sup -}), {gamma}K{sub S}{sup 0}K{sup +}{pi}{sup -}+c.c., {gamma}K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}, {gamma}K*{sup 0}K{sup -}{pi}{sup +}+c.c., {gamma}K*{sup 0}K*{sup 0}, {gamma}{pi}{sup +}{pi}{sup -}pp, {gamma}2(K{sup +}K{sup -}), {gamma}3({pi}{sup +}{pi}{sup -}), and {gamma}2({pi}{sup +}{pi}{sup -})K{sup +}K{sup -} with the invariant mass of hadrons below 2.9 GeV/c{sup 2}. We also report branching fractions of {psi}(2S) decays into 2({pi}{sup +}{pi}{sup -}){pi}{sup 0}, {omega}{pi}{sup +}{pi}{sup -}, {omega}f{sub 2}(1270), b{sub 1}{sup {+-}}{pi}{sup {+-}}, and {pi}{sup 0}2({pi}{sup +}{pi}{sup -})K{sup +}K{sup -}.
Published: 2007
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21. Improved measurement ofψ(2S)decays intoτ+τ−

Author: M. Ablikim, J. Z. Bai, Y. Ban, J. G. Bian, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, S. P. Chi, Y. P. Chu, X. Z. Cui, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, S. D. Gu, Y. T. Gu, Y. N. Guo, Y. Q. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, H. M. Hu, T. Hu, G. S. Huang, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Yi Jin, Y. F. Lai, G. Li, H. B. Li, H. H. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. L. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma, Q. M. Ma, X. B. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, H. P. Peng, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, J. F. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, Z. Q. Tan, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang, L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zhe Wang, Zheng Wang, C. L. Wei, D. H. Wei, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, Z. Y. Yi, G. W. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, Yu Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. M. Zhang, X. Y. Zhang, Yiyun Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, N. F. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Yingchun Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, and B. S. Zou
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle decay, Branching fraction, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics, Particle identification
Abstract: Using 14M psi(2S) events collected at BESII, the branching fraction of psi(2S)->tau(+)tau(-) is measured to be Br-tau tau=(3.08 +/- 0.21 +/- 0.38)x10(-3), where the first error is statistical and the second is systematic.
Published: 2006
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22. Search for Invisible Decays ofηandη′inJ/ψ→ϕηandϕη′

Author: T. Hu, Y. T. Gu, XZ（蔡翔舟） Cai, X. L. Li, B. J. Liu, Yudan Wang, Xingzhu Cui, G. R. Lu, D. H. Wei, Z. A. Zhu, Huirun Chen, Lianyou Shan, F. Lu, Q. Liu, X. X. Xie, X. H. Mo, L. S. Wang, M. H. Ye, L. L. Wang, S. D. Gu, C. P. Shen, S. L. Olsen, Xunchao Zhang, Y. X. Yang, S. S. Sun, Y. P. Chu, Z. Y. Wang, Yingchun Zhu, L. L. Ma, Z. A. Liu, X. P. Xu, X. B. Ji, C. Z. Yuan, Y. Ban, G. S. Varner, Z. Y. Yi, Y. Z. Sun, N. Wu, Zhe Wang, M. G. Zhao, J. Z. Bai, Shang Lunlin, X. Y. Zhang, G. Li, H. Q. Zhang, J. G. Bian, Y. Li, Y. N. Guo, H. Y. Zhang, Jin Chen, Fang Liu, S. S. Fang, H. Y. Sheng, Z. Q. Tan, R. G. Liu, C. D. Fu, J. B. Liu, S. H. Zhang, X. Y. Shen, N. D. Qi, Z. Y. Deng, J. W. Zhao, G. S. Huang, R. G. Ping, P. Wang, B. X. Zhang, X. Tang, X. Q. Li, G. W. Yu, W. R. Zhao, F. Liu, R. Y. Li, Hongbo Liao, D. X. Zhao, Yu Zeng, Han-Qing Zheng, J. Y. Zhang, B. Y. Zhang, Y. N. Gao, Hangxu Li, Y. C. Lou, S. P. Chi, Yiyun Zhang, Cunfeng Wei, P. P. Zhao, Zujian Wang, H. S. Chen, Q. F. Dong, Ning Zhou, H. M. Hu, J. W. Zhang, K. J. Zhu, J. M. Yuan, L. Y. Diao, Y. X. Ye, Q. M. Ma, H. Qin, Z. P. Zheng, Y. K. Heng, Zheng Wang, Y. Yuan, Y. S. Zhu, X. S. Jiang, Z. J. Guo, Y. Zeng, H. L. Ma, S. M. Li, W. D. Li, Y. Q. Guo, J. C. Chen, K. L. He, G. L. Tong, M. Ablikim, B. A. Zhuang, X. Y. Jiang, S. X. Du, Y. B. Chen, M. L. Yan, Jianwei Sun, J. Fang, Y. F. Lai, J. B. Jiao, H. F. Chen, W. F. Wang, B.S. Zou, Z. G. Zhao, Y. F. Liang, D. P. Jin, Z. J. Sun, H. H. Liu, J. C. Li, W. G. Li, D. Y. Wang, D. H. Zhang, H. M. Liu, H. B. Li, C. L. Luo, H. X. Yang, C. C. Zhang, G. F. Xu, S. Jin, J. P. Liu, D. L. Shen, C. X. Liu, J. Nie, Z. Y. Ren, X. B. Ma, Xuai Zhuang, X. M. Xia, Y. S. Dai, C. S. Gao, Jinxing Zheng, Q. M. Zhu, Y. C. Xu, M. Z. Wang, Miao He, H. S. Sun, X. N. Li, L. P. Zhou, X. T. Huang, Haiping Peng, G. Rong, Yi Jin, Z. P. Mao, Y. C. Zhu, P. L. Wang, F. A. Harris, S. L. Zang, Z. P. Zhang, F. C. Ma, J. F. Qiu, and J. G. Lu
Subjects: Physics, Particle physics, General Physics and Astronomy, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Using a data sample of $58\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $J/\ensuremath{\psi}$ decays collected with the Beijing Spectrometer II detector at the Beijing Electron Positron Collider, searches for invisible decays of $\ensuremath{\eta}$ and ${\ensuremath{\eta}}^{\ensuremath{'}}$ in $J/\ensuremath{\psi}$ to $\ensuremath{\phi}\ensuremath{\eta}$ and $\ensuremath{\phi}{\ensuremath{\eta}}^{\ensuremath{'}}$ are performed. The $\ensuremath{\phi}$ signals, which are reconstructed in ${K}^{+}{K}^{\ensuremath{-}}$ final states, are used to tag the $\ensuremath{\eta}$ and ${\ensuremath{\eta}}^{\ensuremath{'}}$ decays. No signals are found for the invisible decays of either $\ensuremath{\eta}$ or ${\ensuremath{\eta}}^{\ensuremath{'}}$, and upper limits at the 90% confidence level are determined to be $1.65\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$ for the ratio $\frac{B(\ensuremath{\eta}\ensuremath{\rightarrow}\mathrm{invisible})}{B(\ensuremath{\eta}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma})}$ and $6.69\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}$ for $\frac{B({\ensuremath{\eta}}^{\ensuremath{'}}\ensuremath{\rightarrow}\mathrm{invisible})}{B({\ensuremath{\eta}}^{\ensuremath{'}}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\gamma})}$. These are the first searches for $\ensuremath{\eta}$ and ${\ensuremath{\eta}}^{\ensuremath{'}}$ decays into invisible final states.
Published: 2006
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23. First observation ofψ(2S)→pn¯π−+c.c

Author: P. Wang, X. Q. Li, Z. J. Guo, H. X. Yang, S. D. Gu, Z. G. Zhao, H. Qin, Q. M. Ma, Y. Yuan, Y. S. Zhu, Xunchao Zhang, J. W. Zhao, K. L. He, S. H. Zhang, X. Y. Shen, J. P. Liu, F. Lu, Y. C. Zhu, Q. M. Zhu, G. W. Yu, J. G. Lu, Z. J. Sun, R. Y. Li, Z. Y. Ren, Y. C. Xu, G. S. Varner, Huirun Chen, Yu Zeng, Y. C. Lou, L. S. Wang, M. G. Zhao, H. Y. Sheng, Z. Q. Tan, Cunfeng Wei, T. Hu, H. H. Liu, P. L. Wang, J. C. Li, XZ（蔡翔舟） Cai, X. L. Li, Q. F. Dong, B. J. Liu, Yudan Wang, Ning Zhou, N. D. Qi, M. Z. Wang, H. S. Sun, J. W. Zhang, Y. F. Liang, H. Y. Zhang, X. N. Li, Jin Chen, S. S. Fang, Miao He, R. G. Ping, D. P. Jin, G. R. Lu, Haiping Peng, Y. Zeng, G. S. Huang, Z. A. Zhu, C. Z. Yuan, Y. Q. Guo, Lianyou Shan, J. Y. Zhang, F. A. Harris, Zhe Wang, Fang Liu, D. H. Zhang, Y. B. Chen, Z. P. Zhang, H. Q. Zhang, S. X. Du, C. P. Shen, X. H. Mo, Y. F. Lai, L. P. Zhou, M. H. Ye, Han-Qing Zheng, F. C. Ma, H. B. Li, M. L. Yan, H. F. Chen, W. F. Wang, C. L. Luo, Y. K. Heng, S. L. Olsen, D. X. Zhao, B. Y. Zhang, Hangxu Li, W. G. Li, C. C. Zhang, X. Y. Zhang, Z. Y. Wang, N. Wu, H. M. Hu, L. L. Wang, Zheng Wang, D. Y. Wang, R. G. Liu, J. B. Liu, Zujian Wang, J. F. Qiu, Xingzhu Cui, Z. P. Mao, L. L. Ma, W. D. Li, L. Y. Diao, H. M. Liu, Z. A. Liu, J. B. Jiao, J. C. Chen, Y. Ban, Y. T. Gu, S. S. Sun, H. S. Chen, X. S. Jiang, J. Fang, B.S. Zou, J. Z. Bai, Y. N. Guo, J. Nie, D. H. Wei, X. Tang, Y. S. Dai, C. S. Gao, Jinxing Zheng, Hongbo Liao, Yiyun Zhang, X. X. Xie, S. L. Zang, Y. X. Ye, Q. Liu, X. B. Ma, Xuai Zhuang, Yingchun Zhu, H. L. Ma, Z. Y. Yi, S. M. Li, Y. Li, W. R. Zhao, F. Liu, Y. N. Gao, Y. X. Yang, Y. Z. Sun, X. M. Xia, Shang Lunlin, G. F. Xu, G. Li, S. Jin, C. D. Fu, Z. Y. Deng, S. P. Chi, K. J. Zhu, J. M. Yuan, D. L. Shen, C. X. Liu, Y. P. Chu, X. P. Xu, X. B. Ji, B. X. Zhang, Z. P. Zheng, G. L. Tong, M. Ablikim, B. A. Zhuang, X. Y. Jiang, Jianwei Sun, Yi Jin, J. G. Bian, P. P. Zhao, X. T. Huang, and G. Rong
Subjects: Physics, Nuclear and High Energy Physics, Crystallography, Electron–positron annihilation, Atomic physics
Abstract: Using $14\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(2S)$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider, the branching fractions of $\ensuremath{\psi}(2S)$ decays to $p\overline{n}{\ensuremath{\pi}}^{\ensuremath{-}}$ and $\overline{p}n{\ensuremath{\pi}}^{+}$ and the branching fractions of the main background channels $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}p\overline{n}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c0}\ensuremath{\rightarrow}\ensuremath{\gamma}p\overline{n}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c2}\ensuremath{\rightarrow}\ensuremath{\gamma}p\overline{n}{\ensuremath{\pi}}^{\ensuremath{-}}$, and $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{cJ}\ensuremath{\rightarrow}\ensuremath{\gamma}p\overline{n}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ are determined. The contributions of the ${N}^{*}$ resonances in $\ensuremath{\psi}(2S)\ensuremath{\rightarrow}p\overline{n}{\ensuremath{\pi}}^{\ensuremath{-}}+c.c.$ are also discussed.
Published: 2006
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24. Search for invisible decays of eta and eta' in J/psi --phi eta and phi eta'

Author: M, Ablikim, J Z, Bai, Y, Ban, J G, Bian, X, Cai, H F, Chen, H S, Chen, H X, Chen, J C, Chen, Jin, Chen, Y B, Chen, S P, Chi, Y P, Chu, X Z, Cui, Y S, Dai, L Y, Diao, Z Y, Deng, Q F, Dong, S X, Du, J, Fang, S S, Fang, C D, Fu, C S, Gao, Y N, Gao, S D, Gu, Y T, Gu, Y N, Guo, Y Q, Guo, Z J, Guo, F A, Harris, K L, He, M, He, Y K, Heng, H M, Hu, T, Hu, G S, Huang, X T, Huang, X B, Ji, X S, Jiang, X Y, Jiang, J B, Jiao, D P, Jin, S, Jin, Yi, Jin, Y F, Lai, G, Li, H B, Li, H H, Li, J, Li, R Y, Li, S M, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, Y L, Li, Y F, Liang, H B, Liao, B J, Liu, C X, Liu, F, Liu, Fang, Liu, H H, Liu, H M, Liu, J, Liu, J B, Liu, J P, Liu, Q, Liu, R G, Liu, Z A, Liu, Y C, Lou, F, Lu, G R, Lu, J G, Lu, C L, Luo, F C, Ma, H L, Ma, L L, Ma, Q M, Ma, X B, Ma, Z P, Mao, X H, Mo, J, Nie, S L, Olsen, H P, Peng, R G, Ping, N D, Qi, H, Qin, J F, Qiu, Z Y, Ren, G, Rong, L Y, Shan, L, Shang, C P, Shen, D L, Shen, X Y, Shen, H Y, Sheng, H S, Sun, J F, Sun, S S, Sun, Y Z, Sun, Z J, Sun, Z Q, Tan, X, Tang, G L, Tong, G S, Varner, D Y, Wang, L, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, W F, Wang, Y F, Wang, Z, Wang, Z Y, Wang, Zhe, Wang, Zheng, Wang, C L, Wei, D H, Wei, N, Wu, X M, Xia, X X, Xie, G F, Xu, X P, Xu, Y, Xu, M L, Yan, H X, Yang, Y X, Yang, M H, Ye, Y X, Ye, Z Y, Yi, G W, Yu, C Z, Yuan, J M, Yuan, Y, Yuan, S L, Zang, Y, Zeng, Yu, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H Q, Zhang, H Y, Zhang, J W, Zhang, J Y, Zhang, S H, Zhang, X M, Zhang, X Y, Zhang, Yiyun, Zhang, Z P, Zhang, D X, Zhao, J W, Zhao, M G, Zhao, P P, Zhao, W R, Zhao, Z G, Zhao, H Q, Zheng, J P, Zheng, Z P, Zheng, L, Zhou, N F, Zhou, K J, Zhu, Q M, Zhu, Y C, Zhu, Y S, Zhu, Yingchun, Zhu, Z A, Zhu, B A, Zhuang, X A, Zhuang, and B S, Zou
Abstract: Using a data sample of 58 x 10(6) J/psi decays collected with the Beijing Spectrometer II detector at the Beijing Electron Positron Collider, searches for invisible decays of eta and eta' in J/psi to phi eta and phi eta' are performed. The phi signals, which are reconstructed in K+K- final states, are used to tag the eta and eta' decays. No signals are found for the invisible decays of either eta or eta', and upper limits at the 90% confidence level are determined to be 1.65 x 10(-3) for the ratio B(eta--invisible)/B(eta --gamma gamma) and 6.69 x 10(-2) for B(eta' --invisible)/B(eta' --gammagamma). These are the first searches for eta and eta' decays into invisible final states.
Published: 2006

25. Pseudoscalar production atωωthreshold inJ/ψ→γωω

Author: M. Ablikim, J. Z. Bai, Y. Ban, J. G. Bian, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, S. P. Chi, Y. P. Chu, X. Z. Cui, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, S. D. Gu, Y. T. Gu, Y. N. Guo, Y. Q. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, H. M. Hu, T. Hu, G. S. Huang, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Yi Jin, Y. F. Lai, G. Li, H. B. Li, H. H. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. L. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma, Q. M. Ma, X. B. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, H. P. Peng, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, J. F. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, Z. Q. Tan, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang, L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zhe Wang, Zheng Wang, C. L. Wei, D. H. Wei, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, Z. Y. Yi, G. W. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, Yu Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. M. Zhang, X. Y. Zhang, Yiyun Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, N. F. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Yingchun Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, and B. S. Zou
Subjects: Pseudoscalar, Physics, Nuclear and High Energy Physics, Particle decay, Crystallography, Branching fraction, Partial wave analysis, Product (mathematics), Center (category theory), High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Omega
Abstract: The decay channel J/{psi}{yields}{gamma}{omega}{omega}, {omega}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0} is analyzed using a sample of 5.8x10{sup 7} J/{psi} events collected with the BESII detector. The {omega}{omega} invariant mass distribution peaks at 1.76 GeV/c{sup 2}, just above the {omega}{omega} threshold. Analysis of angular correlations indicates that the {omega}{omega} system below 2 GeV/c{sup 2} is predominantly pseudoscalar. A partial wave analysis confirms the predominant pseudoscalar structure, together with small 0{sup ++} and 2{sup ++} contributions, and yields a pseudoscalar mass M=1744{+-}10 (stat){+-}15 (syst) MeV/c{sup 2}, a width {gamma}=244{sub -21}{sup +24} (stat){+-}25 (syst) MeV/c{sup 2}, and a product branching fraction Br(J/{psi}{yields}{gamma}{eta}(1760)){center_dot}Br({eta}(1760){yields}{omega}{omega})=(1.98{+-}0.08 (stat){+-}0.32 (syst))x10{sup -3}.
Published: 2006
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26. Observation of a Near-Threshold Enhancement in theωϕMass Spectrum from the Doubly OZI-Suppressed DecayJ/ψ→γωϕ

Author: M. Ablikim, J. Z. Bai, Y. Ban, J. G. Bian, X. Cai, H. F. Chen, H. S. Chen, H. X. Chen, J. C. Chen, Jin Chen, Y. B. Chen, S. P. Chi, Y. P. Chu, X. Z. Cui, Y. S. Dai, L. Y. Diao, Z. Y. Deng, Q. F. Dong, S. X. Du, J. Fang, S. S. Fang, C. D. Fu, C. S. Gao, Y. N. Gao, S. D. Gu, Y. T. Gu, Y. N. Guo, Y. Q. Guo, Z. J. Guo, F. A. Harris, K. L. He, M. He, Y. K. Heng, H. M. Hu, T. Hu, G. S. Huang, X. T. Huang, X. B. Ji, X. S. Jiang, X. Y. Jiang, J. B. Jiao, D. P. Jin, S. Jin, Yi Jin, Y. F. Lai, G. Li, H. B. Li, H. H. Li, J. Li, R. Y. Li, S. M. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, Y. L. Li, Y. F. Liang, H. B. Liao, B. J. Liu, C. X. Liu, F. Liu, Fang Liu, H. H. Liu, H. M. Liu, J. Liu, J. B. Liu, J. P. Liu, Q. Liu, R. G. Liu, Z. A. Liu, Y. C. Lou, F. Lu, G. R. Lu, J. G. Lu, C. L. Luo, F. C. Ma, H. L. Ma, L. L. Ma, Q. M. Ma, X. B. Ma, Z. P. Mao, X. H. Mo, J. Nie, S. L. Olsen, H. P. Peng, R. G. Ping, N. D. Qi, H. Qin, J. F. Qiu, Z. Y. Ren, G. Rong, L. Y. Shan, L. Shang, C. P. Shen, D. L. Shen, X. Y. Shen, H. Y. Sheng, H. S. Sun, J. F. Sun, S. S. Sun, Y. Z. Sun, Z. J. Sun, Z. Q. Tan, X. Tang, G. L. Tong, G. S. Varner, D. Y. Wang, L. Wang, L. L. Wang, L. S. Wang, M. Wang, P. Wang, P. L. Wang, W. F. Wang, Y. F. Wang, Z. Wang, Z. Y. Wang, Zhe Wang, Zheng Wang, C. L. Wei, D. H. Wei, N. Wu, X. M. Xia, X. X. Xie, G. F. Xu, X. P. Xu, Y. Xu, M. L. Yan, H. X. Yang, Y. X. Yang, M. H. Ye, Y. X. Ye, Z. Y. Yi, G. W. Yu, C. Z. Yuan, J. M. Yuan, Y. Yuan, S. L. Zang, Y. Zeng, Yu Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. Q. Zhang, H. Y. Zhang, J. W. Zhang, J. Y. Zhang, S. H. Zhang, X. M. Zhang, X. Y. Zhang, Yiyun Zhang, Z. P. Zhang, D. X. Zhao, J. W. Zhao, M. G. Zhao, P. P. Zhao, W. R. Zhao, Z. G. Zhao, H. Q. Zheng, J. P. Zheng, Z. P. Zheng, L. Zhou, N. F. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Yingchun Zhu, Z. A. Zhu, B. A. Zhuang, X. A. Zhuang, and B. S. Zou
Subjects: Physics, Quantum chromodynamics, Particle physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, General Physics and Astronomy, Omega, Nuclear physics, Near threshold, Mass spectrum, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment
Abstract: An enhancement near threshold is observed in the omega(phi) invariant mass spectrum from the doubly Okubo-Zweig-Iizuka-suppressed decays of J/psi-->gamma(omega)phi, based on a sample of 5.8 x 10(7) J/psi events collected with the BESII detector. A partial wave analysis shows that this enhancement favors JP=0+, and its mass and width are M=1812(+19)(-26)(stat)+/-18(syst) MeV/c2 and Gamma=105+/-20(stat)+/-28(syst) MeV/c2. The product branching fraction is determined to be B(J/psi-->gammaX)B(X-->omega(phi))=[2.61+/-0.27(stat)+/-0.65(syst)]x10(-4).
Published: 2006
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27. Measurement of the branching fractions forJ/ψ→γπ0,γηandγη′

Author: Zheng Wang, F. C. Ma, H. L. Ma, S. M. Li, Q. M. Zhu, Huirun Chen, H. X. Yang, W. D. Li, Z. G. Zhao, S. D. Gu, Y. C. Xu, J. C. Chen, S. H. Zhang, X. Y. Shen, J. Fang, X. Tang, M. Z. Wang, Xunchao Zhang, Y. N. Guo, H. S. Sun, G. S. Varner, P. P. Zhao, X. H. Mo, L. S. Wang, X. S. Jiang, M. H. Ye, B.S. Zou, X. N. Li, J. P. Liu, W. R. Zhao, F. Liu, Z. J. Sun, M. G. Zhao, J. F. Qiu, Haiping Peng, Yingchun Zhu, S. X. Du, M. L. Yan, L. L. Wang, Z. Y. Ren, J. W. Zhao, Z. Y. Yi, Y. N. Gao, H. Y. Zhang, G. S. Huang, G. W. Yu, B. J. Liu, Yudan Wang, P. Wang, G. R. Lu, H. B. Li, J. Y. Zhang, Y. Li, G. F. Xu, J. G. Lu, C. L. Luo, X. Q. Li, H. S. Chen, S. Jin, Y. X. Yang, R. Y. Li, T. Hu, XZ（蔡翔舟） Cai, X. L. Li, C. C. Zhang, Z. A. Zhu, Xingzhu Cui, H. Qin, X. T. Huang, G. Rong, Cunfeng Wei, Q. F. Dong, Han-Qing Zheng, Ning Zhou, F. Lu, Y. Z. Sun, W. G. Li, Lianyou Shan, J. W. Zhang, Miao He, D. Y. Wang, J. Nie, C. P. Shen, L. P. Zhou, S. S. Sun, H. H. Liu, J. C. Li, K. L. He, N. Wu, Z. P. Mao, Z. P. Zheng, H. M. Liu, H. M. Hu, Y. S. Dai, C. S. Gao, X. M. Xia, Jinxing Zheng, Y. C. Zhu, Y. T. Gu, Z. J. Guo, C. Z. Yuan, Yi Jin, Zhe Wang, S. L. Zang, P. L. Wang, H. Q. Zhang, Fang Liu, Jin Chen, G. L. Tong, Q. M. Ma, D. H. Wei, X. Y. Zhang, R. G. Liu, M. Ablikim, B. A. Zhuang, J. B. Liu, X. Y. Jiang, S. S. Fang, D. X. Zhao, B. Y. Zhang, F. A. Harris, Zujian Wang, Jianwei Sun, Hangxu Li, L. Y. Diao, Y. Zeng, Z. P. Zhang, X. B. Ma, Xuai Zhuang, Y. Q. Guo, J. B. Jiao, Y. Yuan, Y. S. Zhu, D. L. Shen, Hongbo Liao, Y. B. Chen, C. X. Liu, Y. F. Lai, H. F. Chen, Q. Liu, W. F. Wang, Yiyun Zhang, S. L. Olsen, Y. F. Liang, B. X. Zhang, D. P. Jin, Y. X. Ye, J. G. Bian, Z. Y. Wang, D. H. Zhang, X. X. Xie, Yu Zeng, Y. C. Lou, Y. K. Heng, Y. P. Chu, X. P. Xu, X. B. Ji, Shang Lunlin, G. Li, C. D. Fu, Z. Y. Deng, S. P. Chi, K. J. Zhu, J. M. Yuan, H. Y. Sheng, Z. Q. Tan, N. D. Qi, R. G. Ping, L. L. Ma, Z. A. Liu, Y. Ban, and J. Z. Bai
Subjects: Systematic error, Pseudoscalar, Physics, Nuclear and High Energy Physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Pi, Analytical chemistry, High Energy Physics::Experiment, Branching (polymer chemistry)
Abstract: The decay modes J/{psi}{yields}{gamma}{pi}{sup 0}, {gamma}{eta} and {gamma}{eta}{sup '} are analyzed using a data sample of 58x10{sup 6} J/{psi} decays collected with the BESII detector at the BEPC. The branching fractions are determined to be: Br(J/{psi}{yields}{gamma}{pi}{sup 0})=(3.13{sub -0.47}{sup +0.65})x10{sup -5}, Br(J/{psi}{yields}{gamma}{eta})=(11.23{+-}0.89)x10{sup -4}, and Br(J/{psi}{yields}{gamma}{eta}{sup '})=(5.55{+-}0.44)x10{sup -3}, where the errors are combined statistical and systematic errors. The ratio of partial widths {gamma}(J/{psi}{yields}{gamma}{eta}{sup '})/{gamma}(J/{psi}{yields}{gamma}{eta}) is measured to be 4.94{+-}0.40, and the singlet-octet pseudoscalar mixing angle of {eta}-{eta}{sup '} system is determined.
Published: 2006
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28. Measurement ofχcJdecays to2(π+π−)pp¯final states

Author: L. S. Wang, M. G. Zhao, X. S. Jiang, F. C. Ma, S. L. Zang, Y. N. Guo, J. F. Qiu, X. X. Xie, X. Tang, Y. C. Zhu, P. L. Wang, F. A. Harris, Yi Jin, Z. P. Zhang, Fang Liu, H. Y. Zhang, Q. Liu, G. S. Huang, Z. P. Zheng, D. X. Zhao, B. J. Liu, Miao He, Yingchun Zhu, B. Y. Zhang, Y. X. Yang, Yudan Wang, Hangxu Li, L. P. Zhou, J. G. Lu, J. Y. Zhang, G. R. Lu, Z. P. Mao, Q. M. Zhu, Han-Qing Zheng, P. P. Zhao, Huirun Chen, X. Y. Zhang, T. Hu, R. G. Liu, Xingzhu Cui, Y. Z. Sun, G. L. Tong, Z. A. Zhu, Z. Y. Yi, M. Ablikim, B. A. Zhuang, X. Y. Jiang, Z. J. Guo, H. M. Hu, XZ（蔡翔舟） Cai, X. L. Li, Y. K. Heng, J. B. Liu, S. S. Sun, Y. C. Xu, Hongbo Liao, M. Z. Wang, F. Lu, C. P. Shen, X. H. Mo, Y. Li, M. H. Ye, Jianwei Sun, Zheng Wang, X. T. Huang, G. Rong, S. D. Gu, H. S. Chen, X. B. Ma, Xuai Zhuang, Y. P. Chu, X. P. Xu, X. B. Ji, Y. Zeng, Yiyun Zhang, Jin Chen, S. S. Fang, Lianyou Shan, G. S. Varner, L. L. Wang, Y. X. Ye, Y. Q. Guo, H. Y. Sheng, Z. Q. Tan, J. B. Jiao, H. S. Sun, X. N. Li, H. L. Ma, S. M. Li, Y. B. Chen, Q. M. Ma, S. X. Du, M. L. Yan, J. C. Chen, Y. F. Lai, Haiping Peng, H. F. Chen, W. F. Wang, Shang Lunlin, N. D. Qi, G. Li, J. Fang, C. D. Fu, S. H. Zhang, X. Y. Shen, Y. Yuan, Y. S. Zhu, Y. T. Gu, N. Wu, Z. Y. Deng, J. G. Bian, R. G. Ping, L. L. Ma, W. R. Zhao, J. Nie, F. Liu, Z. A. Liu, S. L. Olsen, X. Q. Li, B. X. Zhang, Y. N. Gao, D. H. Wei, Y. Ban, S. P. Chi, C. Z. Yuan, Zhe Wang, Z. Y. Wang, H. Qin, K. L. He, K. J. Zhu, J. M. Yuan, J. Z. Bai, P. Wang, Y. S. Dai, C. S. Gao, Yu Zeng, R. Y. Li, Y. C. Lou, Jinxing Zheng, Cunfeng Wei, Q. F. Dong, Ning Zhou, J. W. Zhang, B.S. Zou, W. D. Li, H. Q. Zhang, J. W. Zhao, G. W. Yu, Zujian Wang, L. Y. Diao, Y. F. Liang, D. P. Jin, H. H. Liu, J. C. Li, D. H. Zhang, Z. G. Zhao, Z. J. Sun, H. X. Yang, H. B. Li, C. L. Luo, C. C. Zhang, J. P. Liu, Z. Y. Ren, W. G. Li, D. Y. Wang, H. M. Liu, G. F. Xu, S. Jin, D. L. Shen, C. X. Liu, X. M. Xia, and Xunchao Zhang
Subjects: Physics, Nuclear and High Energy Physics, Crystallography, Lambda
Abstract: Using ${\ensuremath{\chi}}_{{c}_{J}}\ensuremath{\rightarrow}2({\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})p\overline{p}$ decays from $14\ifmmode\times\else\texttimes\fi{}{10}^{6}\ensuremath{\psi}(2S)$ events accumulated by the BESII detector at the BEPC, the intermediate states ${\ensuremath{\Xi}}^{\ensuremath{-}}{\overline{\ensuremath{\Xi}}}^{+}$, $\ensuremath{\Lambda}\overline{\ensuremath{\Lambda}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, and ${K}_{S}^{0}{K}_{S}^{0}p\overline{p}$ are studied, and their branching ratios or upper limits are measured.
Published: 2006
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29. Experimental study ofψ2Sdecays toK+K−π+π−π0final states

Author: J. C. Li, Zheng Wang, J. B. Jiao, P. Wang, P. P. Zhao, Jin Chen, Q. M. Zhu, S. S. Fang, J. C. Chen, Xingzhu Cui, X. Tang, Y. C. Xu, W. G. Li, K. L. He, Y. T. Gu, Z. G. Zhao, F. C. Ma, S. L. Zang, D. Y. Wang, B. J. Liu, Yudan Wang, M. Z. Wang, F. Lu, X. T. Huang, Shang Lunlin, G. Rong, G. Li, Q. M. Ma, G. R. Lu, S. S. Sun, Z. J. Sun, J. Fang, X. Y. Zhang, R. G. Liu, H. S. Sun, C. D. Fu, J. W. Zhao, Y. Yuan, Y. S. Zhu, H. M. Liu, H. B. Li, C. L. Luo, X. N. Li, J. B. Liu, D. H. Wei, Z. Y. Deng, C. C. Zhang, Haiping Peng, G. W. Yu, Xunchao Zhang, Z. A. Zhu, X. X. Xie, C. Z. Yuan, Yingchun Zhu, Zhe Wang, H. Y. Sheng, J. F. Qiu, Q. Liu, Z. Q. Tan, H. L. Ma, S. P. Chi, Han-Qing Zheng, S. M. Li, N. D. Qi, K. J. Zhu, Fang Liu, J. M. Yuan, J. G. Bian, R. G. Ping, C. P. Shen, Miao He, Z. Y. Yi, L. L. Ma, Z. A. Liu, L. S. Wang, M. G. Zhao, L. P. Zhou, Y. Ban, Y. F. Liang, Yu Zeng, J. P. Liu, D. X. Zhao, B. Y. Zhang, D. P. Jin, Hangxu Li, Z. P. Mao, Y. P. Chu, Y. C. Lou, X. P. Xu, X. B. Ji, J. G. Lu, D. H. Zhang, Huirun Chen, H. M. Hu, W. D. Li, H. Y. Zhang, J. Z. Bai, Y. Li, W. R. Zhao, Y. C. Zhu, G. S. Huang, T. Hu, XZ（蔡翔舟） Cai, F. Liu, Y. N. Guo, X. H. Mo, Yi Jin, M. H. Ye, P. L. Wang, J. Y. Zhang, X. L. Li, X. B. Ma, Xuai Zhuang, S. H. Zhang, X. Y. Shen, L. L. Wang, H. X. Yang, Y. N. Gao, Y. K. Heng, J. Nie, Lianyou Shan, F. A. Harris, Z. P. Zhang, S. L. Olsen, Y. S. Dai, C. S. Gao, Y. X. Yang, B. X. Zhang, Z. P. Zheng, Z. Y. Ren, Z. Y. Wang, Jinxing Zheng, Hongbo Liao, S. X. Du, Y. Z. Sun, M. L. Yan, G. L. Tong, Yiyun Zhang, M. Ablikim, B. A. Zhuang, X. Y. Jiang, Jianwei Sun, Y. X. Ye, X. S. Jiang, S. D. Gu, G. S. Varner, X. Q. Li, H. S. Chen, H. Qin, H. Q. Zhang, N. Wu, Zujian Wang, L. Y. Diao, B.S. Zou, Y. Zeng, Z. J. Guo, Y. Q. Guo, Y. B. Chen, Y. F. Lai, H. F. Chen, W. F. Wang, R. Y. Li, Cunfeng Wei, Q. F. Dong, Ning Zhou, J. W. Zhang, X. M. Xia, D. L. Shen, C. X. Liu, G. F. Xu, S. Jin, and H. H. Liu
Subjects: Physics, Nuclear and High Energy Physics, Crystallography, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Omega
Abstract: ${K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ final states are studied using a sample of $14\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(2S)$ decays collected with the Beijing Spectrometer (BESII) at the Beijing Electron-Positron Collider. The branching fractions of $\ensuremath{\psi}(2S)$ decays to ${K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, $\ensuremath{\omega}{K}^{+}{K}^{\ensuremath{-}}$, $\ensuremath{\omega}{f}_{0}(1710)$, ${K}^{*}(892{)}^{0}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}+\mathrm{c}.\mathrm{c}.$, ${K}^{*}(892{)}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}+\mathrm{c}.\mathrm{c}.$, ${K}^{*}(892{)}^{+}{K}^{\ensuremath{-}}{\ensuremath{\rho}}^{0}+\mathrm{c}.\mathrm{c}.$ and ${K}^{*}(892{)}^{0}{K}^{\ensuremath{-}}{\ensuremath{\rho}}^{+}+\mathrm{c}.\mathrm{c}.$ are determined. The first two agree with previous measurements, and the last five are first measurements.
Published: 2006
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30. Observation of a near-threshold enhancement in the omega(phi) mass spectrum from the doubly OZI-suppressed decay J/psi--gamma(omega)phi

Author: M, Ablikim, J Z, Bai, Y, Ban, J G, Bian, X, Cai, H F, Chen, H S, Chen, H X, Chen, J C, Chen, Jin, Chen, Y B, Chen, S P, Chi, Y P, Chu, X Z, Cui, Y S, Dai, L Y, Diao, Z Y, Deng, Q F, Dong, S X, Du, J, Fang, S S, Fang, C D, Fu, C S, Gao, Y N, Gao, S D, Gu, Y T, Gu, Y N, Guo, Y Q, Guo, Z J, Guo, F A, Harris, K L, He, M, He, Y K, Heng, H M, Hu, T, Hu, G S, Huang, X T, Huang, X B, Ji, X S, Jiang, X Y, Jiang, J B, Jiao, D P, Jin, S, Jin, Yi, Jin, Y F, Lai, G, Li, H B, Li, H H, Li, J, Li, R Y, Li, S M, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, Y L, Li, Y F, Liang, H B, Liao, B J, Liu, C X, Liu, F, Liu, Fang, Liu, H H, Liu, H M, Liu, J, Liu, J B, Liu, J P, Liu, Q, Liu, R G, Liu, Z A, Liu, Y C, Lou, F, Lu, G R, Lu, J G, Lu, C L, Luo, F C, Ma, H L, Ma, L L, Ma, Q M, Ma, X B, Ma, Z P, Mao, X H, Mo, J, Nie, S L, Olsen, H P, Peng, R G, Ping, N D, Qi, H, Qin, J F, Qiu, Z Y, Ren, G, Rong, L Y, Shan, L, Shang, C P, Shen, D L, Shen, X Y, Shen, H Y, Sheng, H S, Sun, J F, Sun, S S, Sun, Y Z, Sun, Z J, Sun, Z Q, Tan, X, Tang, G L, Tong, G S, Varner, D Y, Wang, L, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, W F, Wang, Y F, Wang, Z, Wang, Z Y, Wang, Zhe, Wang, Zheng, Wang, C L, Wei, D H, Wei, N, Wu, X M, Xia, X X, Xie, G F, Xu, X P, Xu, Y, Xu, M L, Yan, H X, Yang, Y X, Yang, M H, Ye, Y X, Ye, Z Y, Yi, G W, Yu, C Z, Yuan, J M, Yuan, Y, Yuan, S L, Zang, Y, Zeng, Yu, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H Q, Zhang, H Y, Zhang, J W, Zhang, J Y, Zhang, S H, Zhang, X M, Zhang, X Y, Zhang, Yiyun, Zhang, Z P, Zhang, D X, Zhao, J W, Zhao, M G, Zhao, P P, Zhao, W R, Zhao, Z G, Zhao, H Q, Zheng, J P, Zheng, Z P, Zheng, L, Zhou, N F, Zhou, K J, Zhu, Q M, Zhu, Y C, Zhu, Y S, Zhu, Yingchun, Zhu, Z A, Zhu, B A, Zhuang, X A, Zhuang, and B S, Zou
Abstract: An enhancement near threshold is observed in the omega(phi) invariant mass spectrum from the doubly Okubo-Zweig-Iizuka-suppressed decays of J/psi--gamma(omega)phi, based on a sample of 5.8 x 10(7) J/psi events collected with the BESII detector. A partial wave analysis shows that this enhancement favors JP=0+, and its mass and width are M=1812(+19)(-26)(stat)+/-18(syst) MeV/c2 and Gamma=105+/-20(stat)+/-28(syst) MeV/c2. The product branching fraction is determined to be B(J/psi--gammaX)B(X--omega(phi))=[2.61+/-0.27(stat)+/-0.65(syst)]x10(-4).
Published: 2006

31. Solution structure of the human BTK SH3 domain complexed with a proline-rich peptide from p120cbl

Author: S R, Tzeng, Y C, Lou, M T, Pai, M L, Jain, and J W, Cheng
Subjects: Binding Sites, Proline, Ubiquitin-Protein Ligases, Protein-Tyrosine Kinases, Protein Structure, Secondary, Protein Structure, Tertiary, Solutions, src Homology Domains, Proto-Oncogene Proteins, Agammaglobulinaemia Tyrosine Kinase, Humans, Proto-Oncogene Proteins c-cbl, Peptides, Nuclear Magnetic Resonance, Biomolecular, Protein Binding
Abstract: X-linked agammaglobulinemia (XLA), an inherited disease, is caused by mutations in the Bruton's tyrosine kinase (BTK). The absence of functional BTK leads to failure of B cell differentiation which incapacitates antibody production in XLA patients leading to, sometimes lethal, bacterial infections. Point mutation in the BTK gene that leads to deletion of C-terminal 14 aa residues of BTK SH3 domain was found in one patient family. To understand the role of BTK in B cell development, we have determined the solution structure of BTK SH3 domain complexed with a proline-rich peptide from the protein product of c-cbl protooncogene (p120cbl). Like other SH3 domains, BTK SH3 domain consists of five beta-strands packed in two beta-sheets forming a beta-barrel-like structure. The rmsd calculated from the averaged coordinates for the BTK SH3 domain residues 218-271 and the p120cbl peptide residues 6-12 of the complex was 0.87 A (+/-0.16 A) for the backbone heavy atoms (N, C, and Calpha) and 1.64 A (+/-0.16 A) for all heavy atoms. Based on chemical shift changes and inter-molecular NOEs, we have found that the residues located in the RT loop, n-Src loop and helix-like loop between beta4 and beta5 of BTK SH3 domain are involved in ligand binding. We have also determined that the proline-rich peptide from p120cbl binds to BTK SH3 domain in a class I orientation. These results correlate well with our earlier observation that the truncated BTK SH3 domain (deletion of beta4, beta5 and the helix-like loop) exhibits weaker affinity for the p120cbl peptide. It is likely that the truncated SH3 domain fails to present to the ligand the crucial residues in the correct context and hence the weaker binding. These results delineate the importance of the C-terminus in the binding of SH3 domains and also indicate that improper folding and the altered binding behavior of mutant BTK SH3 domain likely lead to XLA.
Published: 2000

32. Solution structure and RNA-binding activity of the N-terminal leucine-repeat region of hepatitis delta antigen

Author: I J, Lin, Y C, Lou, M T, Pai, H N, Wu, and J W, Cheng
Subjects: Hepatitis delta Antigens, Magnetic Resonance Spectroscopy, Leucine, Circular Dichroism, Molecular Sequence Data, Hepatitis Antigens, Humans, RNA, Amino Acid Sequence, Hepatitis Delta Virus, Sequence Alignment
Abstract: Hepatitis delta virus (HDV) is a satellite virus of the hepatitis B virus (HBV) which provides the surface antigen for the viral coat. The RNA genome of HDV encodes two proteins: the small delta antigen and the large delta antigen. The two proteins resemble each other except for the presence of an additional 19 amino acids at the C terminus of the latter species. We have found that the N-terminal leucine-repeat region of hepatitis delta antigen (HDAg) binds to the autolytic domain of HDV genomic RNA and attenuates its autolytic activity. A 27-residue polypeptide corresponding to residues 24-50 of HDAg, designated dAg(24-50), was synthesized, and its solution structure was found to be an alpha-helix by circular dichroism and (1)H-nuclear magnetic resonance (NMR) techniques. Binding affinity of dAg(24-50) with HDV genomic RNA was found to increase with its alpha-helical content, and it was further confirmed by modifying its N- and C-terminal groups. Furthermore, the absence of RNA binding activity in the mutant peptides, dAgM(24-50am) and dAgM(Ac24-50am), in which Lys38, Lys39, and Lys40 were changed to Glu, indicates a possible involvement of these residues in their binding activity. Structural knowledge of the N-terminal leucine-repeat region of HDAg thus provides a molecular basis for the understanding of its role in the interaction with RNA. Proteins 1999;37:121-129.
Published: 1999

33. Genetic polymorphism of xenobiotic metabolizing enzymes among Chinese lung cancer patients

Author: I, Persson, I, Johansson, Y C, Lou, Q Y, Yue, L S, Duan, L, Bertilsson, and M, Ingelman-Sundberg
Subjects: Adult, Epoxide Hydrolases, Male, Lung Neoplasms, Polymorphism, Genetic, Genotype, Middle Aged, Xenobiotics, Cytochrome P-450 Enzyme System, Humans, Female, Alleles, Aged, Glutathione Transferase
Abstract: Polymorphisms in xenobiotic metabolizing enzymes have been implicated in inter-individual and inter-ethnic differences in cancer susceptibilty. Several studies have indicated an association between variant alleles of the human CYP1A1, CYP2E1 and GSTM1 genes and lung cancer. Activity of microsomal epoxide hydrolase (HYL1) has also been associated with lung cancer, and 2 variant alleles causing amino acid substitutions have been described. We have investigated genetic polymorphisms of the CYP1A1, CYP2E1, GSTM1 and HYL1 genes in 76 Chinese lung cancer patients and 122 healthy Chinese subjects. The allele frequency of the CYP1A1*2B allele was 0.21 among lung cancer patients and 0.20 in the reference group, whereas the corresponding values for the CYP1A1*2A allele were 0.34 and 0.36. The CYP2E1*5B and CYP2E1*6 alleles were less frequent among the cancer patients (0.20 and 0.22) compared with healthy subjects (0.25 and 0.26). The frequency distribution of the HYL1*2 allele was 0.49 among lung cancer patients and 0.42 in the reference group, and the corresponding frequencies for the HYL1*3 allele were 0.13 and 0.10. The homozygous GSTM1*0 genotype was found in 64% of lung cancer patients and in 66% of healthy subjects. Among heavy smokers, the frequency was 73%. The differences in the distribution of variant CYP1A1, CYP2E1 and GSTM1 alleles in lung cancer patients and healthy controls were not statistically significant. Our results indicate that the polymorphisms investigated are of minor importance as genetic susceptibility markers for lung cancer in this population. An increased risk for lung cancer in subjects carrying the HYL*3 allele was observed and suggests that polymorphism in this gene might possibly be a susceptibility factor in the Chinese population.
Published: 1999

34. Local helix content and RNA-binding activity of the N-terminal leucine-repeat region of hepatitis delta antigen

Author: J W, Cheng, I J, Lin, Y C, Lou, M T, Pai, and H N, Wu
Subjects: Hepatitis delta Antigens, Binding Sites, Leucine, Circular Dichroism, DNA, Viral, Molecular Sequence Data, Hepatitis Antigens, Amino Acid Sequence, Hepatitis Delta Virus, Nuclear Magnetic Resonance, Biomolecular, Peptide Fragments, Protein Structure, Secondary, Hydrogen
Abstract: Hepatitis delta virus (HDV) is a satellite virus of the hepatitis B virus (HBV) which provides the surface antigen for the viral coat. Our results show that the N-terminal leucine-repeat region of hepatitis delta antigen (HDAg), encompassing residues 24-50, binds to the autolytic domain of HDV genomic RNA and attenuates its autolytic activity. The solution conformation of a synthetic peptide corresponding to residues 24-50 of HDAg as determined by two-dimensional 1H NMR and circular dichroism techniques is found to be an alpha-helix. The local helix content of this peptide was analyzed by NOEs and coupling constants. Mutagenesis studies indicate that Lys38, Lys39, and Lys40 within this alpha-helical peptide may be directly involved in RNA binding. A structural knowledge of the N-terminal leucine-repeat region of HDAg thus provides a molecular basis for understanding its role in the interaction with RNA.
Published: 1998

35. Complementation of helper-dependent adenoviral vectors: size effects and titer fluctuations

Author: R, Alemany, Y, Dai, Y C, Lou, E, Sethi, E, Prokopenko, S F, Josephs, and W W, Zhang
Subjects: Mutagenesis, Insertional, Virus Assembly, Genetic Complementation Test, Genetic Vectors, Adenovirus E1 Proteins, Humans, Protein Sorting Signals, Serial Passage, Virus Replication, Helper Viruses, Gene Deletion, Adenoviridae, Cell Line
Abstract: The complementation of adenoviral vectors with large deletions in the viral genome was studied. The helper adenovirus used to complement these vectors contains a partial deletion of the packaging signal and the E1 region substituted by the lacZ gene. The effect of vector size on packaging efficiency was analysed in 293 cells using decreasingly shorter vectors expressing GFP from a CMV enhancer-beta-actin promoter. Vectors with longer genomes propagated more efficiently than shorter ones. Vectors containing only the packaging signal and the ITRs of Ad5, having all the viral genes replaced with unrelated sequences packaged as efficiently as vectors of the same size containing adenoviral DNA instead of exogenous DNA. The amounts of helper and vector produced in coinfected 293 cells exhibited the typical cycling fluctuation observed during serial propagation of a virus with defective interfering particles.
Published: 1997

36. [Effects of rifampin and isoniazid on the pharmacokinetics of diazepam in rabbits]

Author: C F, Long, Y, Zhang, and Y C, Lou
Subjects: Male, Random Allocation, Diazepam, Cytochrome P-450 Enzyme System, Isoniazid, Microsomes, Liver, Animals, Rabbits, Rifampin
Abstract: The pharmacokinetics of diazepam (3 mg.kg-1, i.v.) in rabbits was studied after pretreatment with rifampin (RFP, 100 mg.kg-1.d-1 x 4), isoniazid (INH, 50 mg.kg-1.d-1 x 4) and RFP + INH. The results showed that RFP significantly increased cytochrome P-450 content, but the T 1/2 and AUC of diazepam were significantly decreased. The plasma clearance (CL) was increased in the RFP group. In the INH group the T 1/2 and AUC of diazepam were significantly increased and the CL was significantly decreased. However, cytochrome P-450 content and the pharmacokinetic parameters of diazepam were not changed in the RFP + INH group. Our results indicate that RFP induces the activity of hepatic microsomal enzymes and increases the metabolism of diazepam, INH inhibits the activity of hepatic microsomal enzymes and decreases the metabolism of diazepam in rabbits.
Published: 1997

37. Genetic and biochemical approaches for analysis of mitochondrial RNase P from Saccharomyces cerevisiae

Author: K R, Groom, Y L, Dang, G J, Gao, Y C, Lou, N C, Martin, C A, Wise, and M J, Morales
Subjects: Base Sequence, RNA, Mitochondrial, Genes, Fungal, Molecular Sequence Data, Restriction Mapping, RNA, Fungal, Saccharomyces cerevisiae, Chromatography, Ion Exchange, DNA, Mitochondrial, Chromatography, Affinity, Chromatography, DEAE-Cellulose, Ribonuclease P, Mitochondria, Kinetics, Endoribonucleases, Centrifugation, Density Gradient, RNA, Electrophoresis, Polyacrylamide Gel, RNA, Catalytic, Cloning, Molecular, Plasmids
Published: 1996

38. Interplay of heterogeneous transcriptional start sites and translational selection of AUGs dictate the production of mitochondrial and cytosolic/nuclear tRNA nucleotidyltransferase from the same gene in yeast

Author: C L, Wolfe, Y C, Lou, A K, Hopper, and N C, Martin
Subjects: Cell Nucleus, Base Sequence, Transcription, Genetic, Recombinant Fusion Proteins, Genes, Fungal, Molecular Sequence Data, RNA Nucleotidyltransferases, Saccharomyces cerevisiae, Carbon, Mitochondria, Electron Transport Complex IV, Isoenzymes, Cytosol, Protein Biosynthesis, Fermentation, Amino Acid Sequence, RNA, Messenger, Codon, DNA, Fungal, Plasmids
Abstract: ATP (CTP):tRNA nucleotidyltransferase catalyzes the addition of the CCA end to tRNAs. In yeast, nucleotidyltransferase is encoded by the CCA1 gene and is localized to three cellular compartments: mitochondria, nucleus, and cytosol. There are three in-frame ATGs near the 5' end of the CCA1 open reading frame. Primer extension experiments show multiple transcription initiation sites upstream of ATG1 and between ATG1 and ATG2. Fractionation of cells carrying a CCA1-COXIV fusion gene demonstrates that all three in-frame AUGs are used as sites of initiation of translation. Therefore, both transcription of CCA1 mRNA with heterogeneous 5' ends and translation from downstream AUGs in CCA1 mRNAs play a role in the synthesis of three nucleotidyltransferase isozymes. Protein initiating from AUG1 is required for mitochondrial protein synthesis and, like many other proteins targeted to mitochondria, it is processed at the amino terminus upon import into the organelle. The shorter proteins arising from AUG2 and AUG3 provide nuclear/cytosol activity.
Published: 1994

39. Interlaminar-shear-strain measurements in cord-rubber composites

Author: A. Y. C. Lou and Joseph D. Walter
Subjects: Work (thermodynamics), Materials science, Strain (chemistry), Mechanical Engineering, Aerospace Engineering, Orthotropic material, Measure (mathematics), Interlaminar shear, Natural rubber, Mechanics of Materials, visual_art, Solid mechanics, visual_art.visual_art_medium, Composite material
Abstract: The present work is an experimental study using an X-ray technique to measure directly the internal distribution of interlaminar-shear deformations which occur during uniaxial extension of two-ply, cord-rubber, angle-ply laminates—both balanced and unbalanced. Significant interlaminar-shear strains were developed between the two generally orthotropic layers of one-inch-wide specimens, which decreased almost linearly from a maximum at the edges to zero at the center line. These measurements, and those as a function of cord angle, were in good agreement with predictions obtained from various theories of laminated shear-flexible composites.
Published: 1978
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40. Interlaminar Shear Strain Measurements in Cord-Rubber Composites

Author: A. Y. C. Lou and Joseph D. Walter
Subjects: Work (thermodynamics), Interlaminar shear, Materials science, Polymers and Plastics, Strain (chemistry), Natural rubber, visual_art, Materials Chemistry, visual_art.visual_art_medium, Fluid dynamics, Composite material, Orthotropic material, Measure (mathematics)
Abstract: The present work is an experimental study using an X-ray technique to measure directly the internal distribution of interlaminar shear deformations which occur during uniaxial extension of two-ply, cord-rubber, angle-ply laminates—both balanced and unbalanced. Significant interlaminar shear strains were developed between the two generally orthotropic layers of one-inch-wide specimens, which decreased almost linearly from a maximum at the edges to zero at the center line. These measurements and those as a function of cord angle were in good agreement with predictions obtained from various theories of laminated shear-flexible composites.
Published: 1979
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41. Relationship of Tire Rolling Resistance to the Viscoelastic Properties of the Tread Rubber

Author: A. Y. C. Lou
Subjects: Materials science, Polymers and Plastics, Rolling resistance, Crosshead, Viscoelasticity, law.invention, Hysteresis, Natural rubber, Mechanics of Materials, law, visual_art, Automotive Engineering, visual_art.visual_art_medium, Dissipation factor, Radial tire, Composite material, Tread
Abstract: For radial and belted bias automobile tires having replicate bodies but different tread materials, the rolling resistance force was found to be nearly a linear function of the tread material loss ratio (fractional hysteresis) measured at either constant strain or constant stress. Loss ratio is calculated as the ratio of energy loss (hysteresis) to total energy input obtained from constant crosshead speed (sawtooth) loading cycles on an Instron tester. Good correlation was also observed between rolling resistance force and a viscoelastic index (loss tangent) obtained from sinusoidal strain cycles on a Rheovibron instrument. When related to energy loss of the tread, rolling resistance showed good correlation only for a series of natural rubber compounds of varied black content; a tread based on a solution styrene-butadiene rubber polymer fell outside the natural rubber pattern.
Published: 1978
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42. On the response of the plate to a multi-masses moving system

Author: M. M. Stanisic, Y. C. Lou, and J. C. Hardin
Subjects: Field (physics), Computer science, Mechanical Engineering, Solid mechanics, Convergence (routing), Mathematical analysis, Computational Mechanics, Calculus, Natural frequency, Special case, Resonance (particle physics)
Abstract: A method, based on theFourier-transform technique, is presented in order to solve the problem concerning the response of the plates to a moving multimasses system. This problem was of interest in the theory for many years; however, it is of a fundamental importance for a working engineer in the field. The method presented in this paper is general, so that the response of the plates to the moving multi-forces system, appears as a special case of this study. The convergence of the solution has been examined and the numerical results for the first and second approximations, of the special case, have been calculated and plotted. The analysis shows that for the same natural frequency of the plate, the resonance is reached prior by considering the moving multi-masses system than by moving multi-force system; i.e., the natural frequency of the moving multi-masses system is lower than that of the moving multi-forces system. This conclusion is of a vital importance, since the response of the moving force as an approximation for the response of the moving mass can be not only dangerous but also tragic.
Published: 1968
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43. Study of J/ψ decaying into ωpp̄

Author: S. L. Zang, Y. T. Gu, F. Lu, Huirun Chen, S.L. Olsen, H. Q. Zhang, X. H. Mo, L. S. Wang, L. L. Wang, Z. P. Zhang, D. H. Wei, F. C. Ma, M. H. Ye, Junhui Hu, Xuai Zhuang, Zujian Wang, L. Y. Diao, J. F. Qiu, S. D. Gu, J. H. Liu, C. Z. Yuan, K. L. He, M. He, N. Wu, Jian Liu, Y. Xu, Zheng Wang, X. Q. Li, Y. Weng, X. S. Jiang, W. R. Zhao, F. Liu, S. S. Sun, J. Nie, B.S. Zou, G. S. Varner, D. L. Shen, H.L. Ma, J. Hou, Fang Liu, H. Qin, Y. C. Zhu, Y. S. Dai, C. S. Gao, Jinxing Zheng, B. J. Liu, Y. C. Lou, J. W. Zhao, G. W. Yu, J. G. Lu, T. Hu, XZ（蔡翔舟） Cai, X. L. Li, Y. N. Gao, Yudan Wang, P. L. Wang, Y. F. Liang, D. P. Jin, Y. Zeng, R. Y. Li, C. X. Liu, Y. B. Chen, D. X. Zhao, C.D. Fu, B. Y. Zhang, Y. F. Lai, Cunfeng Wei, Q. F. Dong, L. P. Zhou, H. F. Chen, W. F. Wang, H. X. Yang, Z. P. Mao, J. W. Zhang, J. C. Chen, G. R. Lu, P. Wang, Lianyou Shan, F. A. Harris, Z. Y. Wang, Han-Qing Zheng, D. H. Zhang, Hongbo Liao, S. M. Li, Z. A. Zhu, X. M. Xia, J. P. Liu, H. S. Chen, Z.J. Guo, K. J. Zhu, J. Fang, H. M. Hu, Yiyun Zhang, Y. X. Yang, L. L. Ma, H. Y. Zhang, Z. Y. Ren, W. D. Li, Y. X. Ye, Q. M. Ma, P. P. Zhao, W. G. Li, Q. M. Zhu, X. Y. Zhang, C. P. Shen, X. X. Xie, G. S. Huang, Z. A. Liu, Y. Z. Sun, X. T. Huang, R. G. Liu, G. Rong, D. Y. Wang, Y. P. Chu, M. Z. Wang, G. F. Xu, J. Y. Zhang, X. P. Xu, X. B. Ji, S. Jin, Y. Yuan, Y. S. Zhu, Z. G. Zhao, H. S. Sun, X. N. Li, Y. Ban, H. M. Liu, Z. X. Zhang, Shang Lunlin, G. Li, J. B. Liu, Z. J. Sun, J. Z. Bai, Jin Chen, Z. Y. Deng, Xichao Ruan, Y. K. Heng, S. S. Fang, H. B. Li, Qian Liu, C. L. Luo, H. Y. Sheng, S. H. Zhang, X. Y. Shen, C. C. Zhang, N. D. Qi, R. G. Ping, M. G. Zhao, H. H. Liu, J. C. Li, J. B. Jiao, S. X. Du, M. L. Yan, X. Tang, Y. N. Guo, Z. P. Zheng, G. L. Tong, M. Ablikim, B. A. Zhuang, X. Y. Jiang, and B. X. Zhang
Subjects: Physics, Nuclear physics, Physics and Astronomy (miscellaneous), Branching fraction, law, Mass spectrum, Dalitz plot, Invariant mass, Collider, Engineering (miscellaneous), law.invention
Abstract: The decay J/ψ→ωpp is studied using a 5.8×107 J/ψ event sample accumulated with the BES II detector at the Beijing Electron–Positron Collider. The decay branching fraction is measured to be B(J/ψ→ωpp)=(9.8±0.3±1.4)×10-4. No significant enhancement near the pp mass threshold is observed, and an upper limit of B(J/ψ→ωX(1860))B(X(1860)→pp)
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44. Amitriptyline metabolism: relationship to polymorphic debrisoquine hydroxylation

Author: Leif Bertilsson, Britt Mellström, Folke Sjöqvist, Juliette Säwe, and Y C Lou
Subjects: Pharmacology, Adult, Male, Amitriptyline, Smoking, Metabolism, Urine, Nortriptyline, Middle Aged, Hydroxylation, Debrisoquin, chemistry.chemical_compound, Kinetics, chemistry, Debrisoquine, Oral administration, medicine, Humans, Pharmacology (medical), Female, Demethylation, medicine.drug
Abstract: Amitriptyline AT demethylation to nortriptyline NT was determined in nine healthy subjects who had been phenotyped with respect to debrisoquine D hydroxylation capacity. AT demethylation was calculated from the ratio between the plasma AUCs of NT after single oral doses of AT and NT. Plasma clearance of AT by demethylation did not correlate with the ratio between D and 4-hydroxy-D in urine (rs = -0.55).
Published: 1983

45. [Analysis of human leukocyte interferon gene cloned in plasmid p8218]

Author: C D, Lu, Y C, Lou, B L, Li, C Y, Wang, X Y, Liu, D B, Wang, Y D, Hou, Z Q, Zhang, and X K, Yang
Subjects: Base Sequence, Transcription, Genetic, Interferon Type I, Humans, DNA Restriction Enzymes, Cloning, Molecular, Plasmids
Published: 1984

46. Viscoelastic Behavior of a Nonlinear, Fiber-Reinforced Plastic. Part 2

Author: R. A. Schapery and Y. C. Lou
Subjects: Nonlinear system, Materials science, Creep, Glass fiber, Constitutive equation, Fiber-reinforced composite, Composite material, Fibre-reinforced plastic, Material properties, Viscoelasticity
Abstract: The nonlinear mechanical properties of a unidirectional, glass fiber-epoxy composite at 164 F are characterized by using creep and recovery tests together with a constitutive equation based on a thermodynamic theory. Our experimental effort covers studies on specimens with fiber orientations at theta = 0 deg, 30 deg, 45 deg, 60 deg and 90 deg with respect to the uniaxial loading 0 direction. The results for theta = 0 deg specimen show that the composite is linearly elastic for the load range studied, but nonlinear viscoelastic behavior is observed for the other orientations. Guided by the nonlinear constitutive equation, the creep and recovery data are plotted on double-logarithmic paper, and the material properties are found by shifting the data to form a master curve' for each fiber orientation. Prediction of master curves of theta = 45 deg and 60 deg from master curves of theta = 0 deg, 90 deg and 30 deg is made. Four principal creep compliances are estimated by using the master curves and tensor transformation relations. Finally, we use the nonlinear equation to predict strain response due to multiple-step loading and unloading.
Published: 1969
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