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1. Core-multishell globular oxidation in a new TiAlNbCr alloy at high temperatures

Author: S. Q. Tang, S. J. Qu, A. H. Feng, C. Feng, J. Shen, and D. L. Chen
Subjects: Medicine, Science
Abstract: Abstract Oxidation resistance is one of key properties of titanium aluminide (TiAl) based alloys for high-temperature applications such as in advanced aero-engines and gas turbines. A new TiAlNbCr alloy with micro-addition of yttrium has been developed, but its oxidation behavior is unknown. To provide some fundamental insights, high-temperature oxidation characteristics of this alloy are examined via scanning electron microscopy, transmission electron microscopy, electron probe microanalysis, and X-ray diffraction. We show that distinctive core-multishell globular oxidation and “daisy” flower-like oxidation occur exclusively around Y2O3 particles. Globular oxides exhibit multi-layered Y2O3/TiO2/Al2O3-rich/TiO2-rich shell structures from the inside to outside. Flower-like inner oxides consist of core Y2O3 particles surrounded by divergent Al2O3 and oxygen-rich α2-Ti3Al in the near-scale substrate. As the scale-substrate interface moves inward, the inner oxide structures suffer deeper oxidation and transform into the globular oxide structures. Our results demonstrate that the unique oxidation characteristics and the understanding of formation mechanisms pave the way for the exploration and development of advanced oxidation-resistant TiAl-based materials.
Published: 2017
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2. Characterization of a rice dwarf and narrow leaf 2 mutant

Author: Y. M. N. Adedze, X. J. Wei, Z. H. Sheng, G. A. Jiao, S. Q. Tang, and P. S. Hu
Subjects: fine-mapping, leaf and stem structure, mechanical strength, oryza sativa, transcriptional analysis, Biology (General), QH301-705.5, Plant ecology, QK900-989
Abstract: The rice dwarf and narrow leaf mutant 2 (dnl2) is dwarfed and forms narrow and brittle leaves. Its dwarfness was shown to be due to its shortened internodes resulting from a reduced size of the internode parenchyma cells. Its narrow and brittle leaves were attributed to a compromised ability to form vascular bundles but a reduced fiber content and thin cortical layer. However, response to the application of either gibberellin or brassinolide was not different between dnl2 and its wild type. Transcription profiling indicates that a number of cell division/expansion-associated and crude fiber synthesis-related genes were down-regulated in the mutant. A genetic analysis revealed that the mutant phenotype was under monogenic control, and the gene responsible was mapped to a 50.1 kb genomic region on the long arm of chromosome 10. This region was shown to harbor 10 open reading frames. Although transcription profiling these genes indicates that three were differentially transcribed in the mutant, there was no sequence polymorphism in the coding sequence between the mutant and the wild type alleles.
Published: 2017
Full Text: View/download PDF

3. P753: DYSFUNCTIONAL BONE MARROW ENDOTHELIAL PROGENITOR CELLS ARE INVOLVED IN PATIENTS WITH MYELODYSPLASTIC SYNDROMES

Author: T. Xing, Z.-S. Lyu, C.-W. Duan, H.-Y. Zhao, S.-Q. Tang, Q. Wen, Y.-Y. Zhang, M. Lv, Y. Wang, L.-P. Xu, X.-H. Zhang, X.-J. Huang, and Y. Kong
Subjects: Diseases of the blood and blood-forming organs, RC633-647.5
Published: 2022
Full Text: View/download PDF

4. [Spatiotemporal distribution and related factors of congenital syphilis in Guangdong province from 2005 to 2017: a spatial panel data analysis]

Author: S Q, Tang, W, Chen, P Z, Zhao, H P, Zheng, B, Yang, L S, Shi, L, Ling, and C, Wang
Subjects: Data Analysis, China, Spatial Analysis, Pregnancy, Incidence, Syphilis, Congenital, Humans, Female, Syphilis
Published: 2021

5. Single-Photon Quantum Router With a Three-Level Atom Embedded Within a T-Bulge Structure of Coupled Resonant Waveguide

Author: S. Q. Tang, J. B. Yuan, and L. Liu
Subjects: Physics, Photon, Scattering, Physics::Optics, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas, Reflection (mathematics), Quantum mechanics, 0103 physical sciences, Atom, Waveguide (acoustics), General Materials Science, Routing (electronic design automation), Quantum information, 010306 general physics, Quantum
Abstract: Photon quantum routing is one of the key elements of the quantum information network and integrated optical devices. In this paper, we theoretically investigate the single-photon transport in an intersection coupled resonant waveguide (CRW), called the T-bulge structure, in which the $$N\hbox {th}$$ cavity of a semi-infinite CRW couples with one point of an infinite CRW via a cascaded three-level atom. By using the discrete coordinates approach, transmission and reflection amplitudes of the propagating single photon in the waveguide are analytically obtained. Two cases that a single photon is incident from the infinite CRW and from semi-infinite CRW are considered, respectively. Based on the theoretical framework, we show that the quantum router function can be realized by directing a single photon incidenting from the semi-infinite CRW to the infinite CRW with the unity probabilities, and the probability of routing single photons from infinite CRW to semi-infinite CRW could reach 0.5. Our study provides a full quantum control scheme of single-photon scattering in T-bulge structure coupled cavity array waveguide.
Published: 2018

6. Evidence of ψ(3770) non-DD¯ decay to J/ψπ+π−

Author: M. He, X. Tang, W. G. Li, Q. M. Zhu, D. L. Shen, K. L. He, J. W. Zhao, L. P. Fu, Y. C. Xu, S. W. Han, J. M. Zhang, S. L. Zang, C. X. Liu, G. W. Yu, M. Z. Wang, Z. A. Liu, M. Y. Gong, C. F. Liu, Yingchun Zhu, Zheng Wang, S.L. Olsen, H. M. Liu, J. G. Lu, H. S. Sun, Houbing Lu, C. C. Zhang, Haiping Peng, W. R. Zhao, F. Liu, F. Li, F. C. Ma, Q. Yue, Y. Ban, M. H. Ye, R. B. Li, Fang Liu, J. C. Chen, Jing Wang, Y. B. Zhao, J. Z. Bai, Y. N. Gao, H. M. Hu, T. Hu, XZ（蔡翔舟） Cai, Qiyang Zhang, H. S. Chen, Yang Tian, J. F. Qiu, L. Y. Dong, D. X. Zhao, B. Y. Zhang, Jiawei Zhao, Jiemin Li, J. P. Liu, S.S. Sun, S. D. Gu, J. Nie, Z. Y. Wang, J. Fang, L. S. Zheng, H. Y. Sheng, L. L. Ma, G. F. Xu, S. Jin, S. X. Du, X. L. Luo, H. Y. Zhang, W. D. Li, L. P. Zhou, S. T. Xue, M. L. Yan, G. A. Yang, P. Wang, N. D. Qi, Y. M. Dai, Liang Huang, X. Y. Zhang, Z. G. Zhao, X. C. Zhong, Z. J. Ke, R. G. Liu, G. S. Varner, Z. P. Mao, Y. S. Dai, J. Ying, J. Y. Zhang, J. B. Liu, H. Shen, Y. C. Zhu, R. Y. Li, F. Lu, C. S. Gao, Z. Z. Du, Y. P. Chu, X. B. Ji, P. L. Wang, Meng Wang, W. B. Yan, Jinxing Zheng, Z. J. Sun, X. H. Mo, Z. X. Liu, X. C. Meng, Y. K. Heng, Y. Y. Zhang, Cunfeng Wei, Ning Zhou, F. A. Harris, C. D. Qian, Y. N. Guo, Yudan Wang, S. Q. Tang, J. C. Li, D. Tian, Y. Jin, J. W. Zhang, T. Hong, L. S. Wang, G. Li, S. D. Yang, J. J. He, Zhe Wang, C. D. Fu, H. X. Yang, G. R. Lu, Z.J. Guo, J. G. Bian, Z. A. Zhu, Y. Yuan, Y. S. Zhu, Xingzhu Cui, Z. P. Zhang, Xintong Li, M. L. Gao, X. X. Xie, X. M. Xia, Bing Zhou, Chun-Hua Jiang, L. W. Song, Y. Zeng, S. P. Chi, Y. Q. Guo, P. P. Zhao, H. Y. Fu, Zujian Wang, Q. J. Li, B. X. Zhang, K. J. Zhu, S. Q. Zhang, J. M. Yuan, Y. B. Chen, Y. Z. Sun, S. S. Fang, Y. B. Liu, Y. F. Lai, Lei Zhang, H. F. Chen, W. F. Wang, Zhiyun Zheng, G. Rong, Feng Shi, Z. J. Lu, H. H. Li, B.S. Zou, N. Wu, Y. J. Zhang, Guangzhao Zhou, Xiru Huang, G. L. Tong, B. A. Zhuang, X. Y. Shen, Jiming Yang, G. S. Huang, K. Li, J. Z. Wang, D. P. Jin, X. S. Jiang, D. H. Zhang, C. S. Yu, J. F. Chang, Yiyun Zhang, Z. D. Nie, Y. X. Ye, E. C. Ma, X. H. He, X. Q. Li, Jun-Bing Ma, and W. X. Gong
Published: 2020

7. Observation of a Near-Threshold Enhancement in the pp¯ Mass Spectrum from Radiative J/ψ→γpp¯ Decays

Author: B.S. Zou, Yudan Wang, S. Q. Tang, J. Chen, H. M. Hu, W. B. Yan, J. G. Lu, G. R. Lu, Z. A. Zhu, D. Paluselli, G. S. Huang, Q. J. Li, T. Hu, XZ（蔡翔舟） Cai, Jiming Yang, Bing Zhou, F. Li, F. C. Ma, Q. Yue, J. C. Chen, R. Malchow, J. W. Zhao, G. W. Yu, K. Li, C. F. Liu, Yingchun Zhu, G. Li, Zhe Wang, R. B. Li, Jing Wang, Y. B. Zhao, Z. A. Liu, Xingzhu Cui, W. D. Li, W. R. Zhao, F. Liu, Liang Huang, S. D. Gu, Jie Chen, C. D. Fu, Y. Ban, B. D. Jones, S.S. Sun, M. L. Gao, Y. Zeng, Y. N. Gao, J. Fang, P. P. Zhao, Y. Q. Guo, Feng Shi, L. S. Zheng, J. Z. Wang, J. F. Qiu, S. T. Xue, Y. B. Chen, K. L. He, Z. P. Zheng, X. C. Zhong, Qiyang Zhang, Z. Y. Wang, Z. J. Lu, H. Y. Zhang, Lei Zhang, J. Z. Bai, X. H. Mo, L. S. Wang, H. H. Li, Guangzhao Zhou, Zheng Wang, X. M. Xia, X. C. Meng, G. S. Varner, Z. J. Guo, Y. F. Lai, Joseph Izen, G. Rong, S. W. Han, X. Tang, D. P. Jin, J. F. Chang, Xintong Li, Jun-Bing Ma, Xiru Huang, H. F. Chen, Fang Liu, J. Ying, W. F. Wang, W. H. Toki, J. M. Zhang, N. Wu, T. Hong, X. X. Xie, P. Wang, S. Q. Zhang, H. Y. Fu, G. L. Tong, B. A. Zhuang, J. Y. Zhang, H. Y. Sheng, W. X. Gong, Z. P. Zhang, Yiyun Zhang, Chun-Hua Jiang, M. H. Ye, Y. Z. Sun, D. H. Zhang, D. X. Zhao, B. Y. Zhang, Y. P. Chu, X. B. Ji, C. S. Yu, Jiemin Li, J. P. Liu, X. L. Luo, X. Y. Shen, N. D. Qi, Y. M. Dai, Y. X. Ye, Zujian Wang, L. Y. Dong, Y. C. Zhu, G. A. Yang, Meng Wang, D. Kong, C. D. Qian, Z. Z. Du, M. He, D. L. Shen, X. S. Jiang, M. Y. Gong, P. L. Wang, W. Dunwoodie, X. Q. Li, Y. K. Heng, Y. Y. Zhang, X. Y. Zhang, W. G. Li, S. P. Chi, Z. X. Liu, C. X. Liu, R. G. Liu, D. Tian, F. Lu, J. B. Liu, H. M. Liu, J. J. He, K. J. Zhu, J. M. Yuan, J. G. Bian, B. X. Zhang, Y. Jin, F. A. Harris, Y. N. Guo, Z. D. Nie, Y. Yuan, Y. S. Zhu, G. F. Xu, S. Jin, L. W. Song, S. S. Fang, C. Z. Yuan, Y. B. Liu, Yang Tian, E. C. Ma, S. X. Du, M. L. Yan, X. H. He, Y. J. Zhang, H. S. Chen, L. P. Zhou, Z. P. Mao, S. L. Zang, S.L. Olsen, J. Nie, Y. S. Dai, C. S. Gao, Jinxing Zheng, Q. M. Zhu, Y. C. Xu, M. Z. Wang, H. S. Sun, Haiping Peng, X. C. Lou, S. D. Yang, L. P. Fu, Houbing Lu, C. C. Zhang, J. C. Li, H. X. Yang, Z. G. Zhao, Z. J. Sun, H. Shen, R. Y. Li, Cunfeng Wei, Ning Zhou, J. W. Zhang, Jiawei Zhao, and Z. J. Ke
Subjects: Physics, Near threshold, Mass spectrum, Radiative transfer, Atomic physics
Published: 2020

8. Measurements of the Cross Section for e+e− → Hadrons at Center-of-Mass Energies from 2 to 5 GeV

Author: B.S. Zou, X. H. Mo, L. S. Wang, J. W. Zhao, X. C. Meng, Feng Shi, G. W. Yu, Xiaolu Ji, H. Shen, P. L. Wang, H. Y. Sheng, R. Y. Li, M. H. Ye, Guangzhao Zhou, C. X. Yu, T. Hong, Yirong Zhu, H. S. Mao, N. D. Qi, F. A. Harris, L. Y. Dong, Xingzhu Cui, Cunfeng Wei, W. G. Li, B. S. Cheng, J. Z. Wang, J. W. Zhang, J. G. Lu, Y. Yuan, Y. S. Zhu, Jun-Bing Ma, G. F. Xu, Z. P. Zhang, Chun-Hua Jiang, X. Y. Shen, H. M. Liu, Jing Wang, Y. B. Zhao, Y. Ban, T. Hu, D. H. Zhang, C. S. Yu, G. S. Huang, D. M. Xi, Z. J. Guo, M. G. Zhao, X. D. Chen, Y. K. Que, B. J. Liu, S. Q. Tang, L. P. Fu, H. B. Li, C. C. Zhang, Zhengguo Zhao, H. M. Hu, H. S. Chen, B. D. Jones, H. H. Li, G. R. Lu, E. C. Ma, J. B. Choi, Z. A. Zhu, H. L. Zhang, J. F. Qiu, C. D. Qian, Y. Z. Huang, H. W. Zhao, X. Q. Li, W. B. Yan, X. H. He, S. D. Gu, J. Z. Bai, Q. J. Li, Z. P. Zheng, Peng Zhang, P. Q. Li, H. X. Yang, D. Li, J. S. Kang, Hyunyong Kim, Jiawei Zhao, Z. J. Lu, Z. Z. Du, Wei Li, J. C. Li, X. Y. Zhang, J. P. Liu, R. G. Liu, C. Y. Yang, J. Y. Suh, Z. J. Ke, Xiru Huang, Feng Liu, Tai Young Kim, J. G. Bian, G. L. Tong, Tao Liu, J. Y. Zhang, S. W. Ye, G. A. Yang, Seong Keun Kim, Y. F. Lai, Z. X. Liu, G. S. Varner, B. A. Zhuang, H. Z. Shi, Xuan Yang, X. M. Xia, Qiyang Zhang, K. L. He, H. Park, Fei-Fei Liu, S. W. Han, Lingxuan Zhang, X. F. Song, W. Dunwoodie, H. F. Chen, Hongming Zhang, P. P. Zhao, Z. D. Nie, D. Kong, H. Y. Fu, Xinglong Li, W. G. Yan, W. H. Toki, Liangfeng Sun, Y. K. Heng, Y. Y. Zhang, Lei Zhang, Q. H. Hu, S. T. Xue, Y. X. Ye, S. P. Chi, Y. Jin, Joseph Izen, D. Paluselli, G. Rong, C. M. Yang, M. He, D. L. Shen, G. Y. Hu, K. J. Zhu, B. W. Shen, D. X. Zhao, B. Y. Zhang, Jiemin Li, J. C. Chen, R. Malchow, Y. Y. Wang, Z. Y. Wang, Yi Chen, S. M. Wang, Y. P. Chu, L. S. Zheng, P. Wang, Bing Zhou, Y. N. Guo, A. D. Chen, N. Wu, Y. L. Han, S. Q. Zhang, Y. Z. Sun, W. R. Zhao, X. R. Qi, F. Lu, S.L. Olsen, L. P. Zhou, Z. P. Mao, W. Yang, J. Nie, Y. S. Dai, Y. Y. Shao, C. S. Gao, Jinxing Zheng, Q. M. Zhu, Y. C. Xu, J. He, H. S. Sun, X. C. Lou, X. X. Xie, Y. B. Liu, X. L. Luo, and J. J. He
Subjects: Physics, Nuclear physics, Cross section (physics), Hadron, Center of mass
Published: 2020

9. Direct Measurement of the Pseudoscalar Decay Constant, fDs

Author: Z. P. Zheng, Y. Jin, J. C. Li, C. C. Zhang, D. Paluselli, G. P. Zhou, J. G. Lu, G. Zioulas, S. Z. Lin, W. R. Zhao, Z. A. Liu, L. S. Wang, M. H. Ye, R. B. Li, I. Blum, Z. Q. Xu, Y. H. Zhou, K. R. He, R. J. Wilson, Chun-Hua Jiang, D. P. Stoker, J. H. Liu, T. J. Wang, S. Whittaker, R. Malchow, G. L. Tong, T. Hu, Michael Schernau, W. Yang, B. A. Zhuang, P. Gratton, Q. P. Jia, J. Panetta, S. M. Chen, X. M. Xia, H. B. Lan, W. X. Zhao, S. Q. Gao, J. Nie, J. Fang, L. S. Zheng, X. R. Shi, Y. Z. Huang, G. P. Chen, Y. B. Liu, Y. Zhang, Y. C. Zhu, O. Bardon, P. L. Wang, E. Soderstrom, H. Shen, Wei Li, D. X. Zhao, B. Y. Zhang, F. C. Porter, F. Sun, X. Q. Hu, W. D. Li, Y. F. Gu, S. H. Kang, D. Z. Xu, J. M. lzen, X. F. Zhou, D. Q. Huang, R. S. Xu, Y. Y. Wang, Y. Y. Shao, C. S. Gao, D. G. Hitlin, M. He, D. L. Shen, J. Quigley, S. Z. Ye, M. Hatanaka, M. Mandelkern, C. Z. Yuan, H. B. Hu, R. G. Liu, Jinxing Zheng, S. J. Chen, H. S. Mao, B. K. Kim, Y. Q. Chen, S. T. Xue, J. W. Zhang, B. Schmid, B. S. Cheng, J. Z. Bai, A. Breakstone, Q. Liu, Xingzhu Cui, M. G. Zhao, G. Y. Hu, F. A. Harris, L. Jones, J. H. Gu, J. Schultz, X. L. Fan, F. Li, H. L. Ni, H. C. Cui, Y. K. Que, J. Chen, Li Zhou, H. B. Yao, Q. M. Zhu, H. Z. Shi, P. Wang, Jun-Bing Ma, Y. P. Tan, S. M. Wang, D. M. Xi, J. Yan, S. W. Han, J. Synodinos, X. F. Song, P. P. Xie, X. Y. Shen, P. F. Lang, J. W. Zhao, S. D. Gu, S. Q. Zhang, L. Z. Wang, A. M. Ma, H. S. Zhou, J. J. He, M. Z. Wang, H. L. Ding, M. H. Kelsey, Y. N. Guo, E. Torrence, H. S. Sun, X. C. Lou, J. Oyang, H. Y. Sheng, W. Dunwoodie, R. K. Yamamoto, Y. L. Han, P. Q. Li, M. L. Gao, W. G. Li, Xinglong Li, D. H. Zhang, J. Y. Zhang, X. Q. Li, S. Q. Tang, Pihong Zhao, W. J. Wisniewski, C. S. Yu, C. X. Yu, B. Lowery, W. X. Gu, R. Cowan, E. Prabhakar, Y. B. Chen, W. H. Toki, C. Y. Yang, N. D. Qi, H. M. Liu, A. J. Lankford, Y. F. Lai, H. F. Chen, X. C. Meng, W. F. Wang, J. Standifird, L. J. Pan, Michael J. Fero, Y. Y. Zhang, A. J. S. Smith, Y. S. Zhu, C. M. Yang, W. X. Gao, Z. Z. Du, W. G. Yan, S. J. Sun, E. C. Ma, Lei Zhang, H. L. Zhang, G. Rong, Z. Q. Yu, S.L. Olsen, T. H. Burnett, F. Wang, Z. P. Mao, and Q. Y. Li
Subjects: Physics, Pseudoscalar, Particle physics, Exponential decay
Published: 2020

10. ψ(2S) Hadronic Decays to Vector-Tensor Final States

Author: Dehong Zhang, W. G. Yan, I. Blum, F. Sun, A. J. Lankford, Qiyang Zhang, H. Z. Shi, Y. H. Yu, Chun-Hua Jiang, Q. M. Zhu, J. Z. Bai, X. F. Song, Lei Zhang, Joseph Izen, G. Rong, Y. Z. Huang, P. Wang, L. Z. Wang, W. G. Li, J. Panetta, Y. C. Zhu, Kai Yi, M. Z. Wang, L. P. Zhou, F. C. Porter, Z. G. Zhao, M. H. Kelsey, D. M. Xi, J. G. Lu, J. Yan, Jiming Yang, F. Wang, C. H. Luo, P. L. Wang, Z. Z. Du, H. S. Sun, L. J. Pan, Z. P. Mao, Meng Wang, Y. X. Ye, H. M. Liu, S. T. Xue, S. M. Wang, X. N. Li, X. C. Lou, H. Shen, P. Gratton, J. H. Liu, Q. H. Hu, J. Y. Zhang, T. Hu, F. Lu, Y. H. Xie, Y. G. Xie, Y. K. Que, J. Chen, G. Y. Hu, X. M. Xia, H. M. Hu, Michael Schernau, T. J. Wang, H. L. Ding, Z. W. Chai, W. Yang, J. Nie, J. G. Bian, D. H. Zhang, C. S. Yu, F. A. Harris, H. Y. Sheng, Z. Q. Yu, Y. Y. Zhang, C. Z. Yuan, X. Q. Hu, E. C. Ma, H. L. Zhang, Y. Y. Shao, S. D. Gu, S.L. Olsen, Cunfeng Wei, H. B. Li, C. S. Gao, D. G. Hitlin, J. W. Zhang, J. P. Liu, H. S. Mao, G. P. Chen, W. D. Li, S. Feng, Y. F. Gu, C. X. Yu, Shun-Qi Zhang, M. He, D. L. Shen, N. D. Qi, Y. B. Chen, X. C. Meng, W. J. Xiong, P. F. Lang, Jinxing Zheng, J. D. Huang, J. F. Qiu, Y. Jin, R. B. Li, J. Standifird, C. D. Qian, C. C. Zhang, M. G. Zhao, L. Y. Dong, G. P. Zhou, D. Kong, Cheng-Kui Li, W. X. Gu, Y. N. Guo, B. S. Cheng, W. H. Toki, Y. L. Han, W. R. Zhao, B. W. Shen, L. C. Lu, G. F. Xu, B. Lowery, D. Paluselli, J. He, S. Q. Gao, Z. J. Ke, W. Dunwoodie, X. R. Qi, J. L. Zhang, Y. Zhang, J. C. Li, P. P. Xie, J. C. Chen, R. Malchow, D. Li, C. M. Yang, J. W. Zhao, Y. Yuan, Y. S. Zhu, J. H. Gu, L. S. Zheng, P. Q. Li, X. Y. Shen, Z. P. Zheng, J. Oyang, X. Y. Zhang, R. G. Liu, L. S. Wang, M. H. Ye, G. L. Tong, B. A. Zhuang, M. L. Gao, S. Q. Tang, Wei Li, L. Y. Ding, Y. H. Qu, B. K. Kim, Y. F. Lai, H. F. Chen, S. W. Han, A. M. Ma, H. S. Zhou, H. W. Zhao, C. Y. Yang, Jun-Bing Ma, Xingzhu Cui, Z. T. Yu, D. X. Zhao, B. Y. Zhang, Y. Y. Wang, S. W. Ye, M. Weaver, J. L. Hu, Y. G. Wu, J. J. He, Y. Q. Chen, X. H. Li, J. Y. Lu, C. C. Xu, Y. B. Liu, and Xuan Yang
Subjects: Physics, Particle physics, Hadron, Tensor
Published: 2020

11. Characterization of a rice dwarf and narrow leaf 2 mutant

Author: G. A. Jiao, P. S. Hu, S. Q. Tang, Z. H. Sheng, Yawo Mawunyo Nevame Adedze, and X. J. Wei
Subjects: 0106 biological sciences, 0301 basic medicine, Genetics, Mutant, Wild type, food and beverages, Plant Science, Horticulture, Biology, 01 natural sciences, Genetic analysis, 03 medical and health sciences, chemistry.chemical_compound, 030104 developmental biology, chemistry, Transcription (biology), Coding region, Allele, Gene, 010606 plant biology & botany, Brassinolide
Abstract: The rice dwarf and narrow leaf mutant 2 (dnl2) is dwarfed and forms narrow and brittle leaves. Its dwarfness was shown to be due to its shortened internodes resulting from a reduced size of the internode parenchyma cells. Its narrow and brittle leaves were attributed to a compromised ability to form vascular bundles but a reduced fiber content and thin cortical layer. However, response to the application of either gibberellin or brassinolide was not different between dnl2 and its wild type. Transcription profiling indicates that a number of cell division/expansion-associated and crude fiber synthesis-related genes were down-regulated in the mutant. A genetic analysis revealed that the mutant phenotype was under monogenic control, and the gene responsible was mapped to a 50.1 kb genomic region on the long arm of chromosome 10. This region was shown to harbor 10 open reading frames. Although transcription profiling these genes indicates that three were differentially transcribed in the mutant, there was no sequence polymorphism in the coding sequence between the mutant and the wild type alleles.
Published: 2017

12. Robust generation of entangled state via ground-state antiblockade of Rydberg atoms

Author: S. Q. Tang, Bao Liu, Y. J. Zhao, Y. Q. Ji, and Xiao-Qiang Shao
Subjects: Physics, Multidisciplinary, lcsh:R, Stimulated Raman adiabatic passage, lcsh:Medicine, Quantum Physics, Quantum entanglement, 01 natural sciences, Article, 010305 fluids & plasmas, symbols.namesake, Quantum mechanics, 0103 physical sciences, Rydberg atom, Rydberg formula, symbols, lcsh:Q, Spontaneous emission, Physics::Atomic Physics, lcsh:Science, 010306 general physics, Adiabatic process, Ground state, Excitation
Abstract: We propose a mechanism of ground-state antiblockade of Rydberg atoms, which is then exploited to prepare two-atom entangled state via three different kinds of pulses. First we use the pulses in the form of sin2 and cos2 functions and obtain a maximally entangled state at an accurate interaction time. Then the method of stimulated Raman adiabatic passage (STIRAP) is adopted for the entanglement generation, which is immune to the fluctuations of revelent parameters but requires a long time. Finally we capitalize the advantages of the former two methods and employ shortcuts to adiabatic passage (STAP) to generate the maximal entanglement. The strictly numerical simulation reveals that the current scheme is robust against spontaneous emission of atoms due to the virtual excitation of Rydberg states, and all of the above methods favor a high fidelity with the present experimental technology.
Published: 2017

13. Identification and molecular mapping of indica high-tillering dwarf mutant htd4, a mild phenotype allelic mutant of D14 in rice (Oryza sativa L.)

Author: Z.-M. Wu, Q.-H. Shi, H.-Z. Chen, H. Zhang, Y.-P. Wang, E.-C. Duan, S.-Q. Tang, and Z.-F. Wu
Subjects: 0301 basic medicine, Mutant, Plant Science, Genes, Plant, Polymerase Chain Reaction, 03 medical and health sciences, Botany, Allele, Codon, Gene, Ecology, Evolution, Behavior and Systematics, Alleles, Genetics, Molecular breeding, Oryza sativa, biology, Wild type, food and beverages, Chromosome Mapping, Oryza, General Medicine, Sequence Analysis, DNA, biology.organism_classification, Phenotype, 030104 developmental biology, Mutation, Plant hormone
Abstract: Metabolism of strigolactones (SLs) can improve the efficiency of nutrient use by regulating the development of roots and shoots in crops, making them an important research focus for molecular breeding. However, as a very important plant hormone, the molecular mechanism of SL signal transduction still remains largely unknown. In this study, we isolated an indica high-tillering dwarf mutant 4 (htd4), a spontaneous mutant of rice, from the restorer line Gui99. Mapping and sequencing analysis showed that htd4 was a novel allelic mutant of D14, in which a single base substitution forms a premature termination codon. Quantitative RT-PCR analyses revealed that expression levels of the genes D10, D17, D27, D3 and D14 increased significantly, while expression of D53 decreased in htd4, compared with the wild type. A subcellular localisation assay showed that the mutant of D14 in htd4 did not disturb the normal localisation of D14 proteins. However, a BiFC assay suggested that the mutant-type D14 could not interact with D3. Additionally, compared with other D14 allelic mutants, htd4 was the first mutant of D14 discovered in indica, and the differences in many yield traits such as plant height, seed-setting rate and grain sizes between htd4 and the wild type were less than those between other D14 allelic mutants and the wild type. Therefore, htd4 is considered a mild phenotype allelic mutant of D14. We conclude that the absence of functional D14 caused the high-tillering dwarf phenotype of htd4. Our results may provide vital information for research on D14 function and the application of htd4 in molecular breeding.
Published: 2017

14. Characterization and gene cloning of the rice (Oryza sativa L.) dwarf and narrow-leaf mutant dnl3

Author: J. L. Wang, Xiangjin Wei, S. Q. Tang, L. Shi, Yawo Mawunyo Nevame Adedze, Z. H. Sheng, and P. S. Hu
Subjects: 0106 biological sciences, 0301 basic medicine, Candidate gene, Genotype, Cell division, Mutant, Biology, 01 natural sciences, 03 medical and health sciences, chemistry.chemical_compound, Gene mapping, Gene Expression Regulation, Plant, Genetics, Amino Acid Sequence, Cloning, Molecular, Molecular Biology, Gene, Gibberellic acid, Phylogeny, Plant Proteins, Oryza sativa, Chromosome Mapping, food and beverages, Oryza, General Medicine, Plant Leaves, Phenotype, 030104 developmental biology, chemistry, Leaf morphogenesis, Mutant Proteins, Cell Division, 010606 plant biology & botany
Abstract: The dwarf and narrow-leaf rice (Oryza sativa L.) mutant dnl3 was isolated from the Japonica cultivar Zhonghua 11 (wild-type). dnl3 exhibited pleiotropic developmental defects. The narrow-leaf phenotype resulted from a marked reduction in the number of vascular bundles, while the dwarf stature was caused by the formation of foreshortened internodes and a reduced number of parenchyma cells. The suggestion that cell division is impaired in the mutant was consistent with the transcriptional behavior of various genes associated with cell division. The mutant was less responsive to exogenously supplied gibberellic acid than the wild-type, and profiling the transcription of genes involved in gibberellin synthesis and response revealed that a lesion in the mutant affected gibberellin signal transduction. The dnl3 phenotype was inherited as a single-dominant gene, mapping within a 19.1-kb region of chromosome 12, which was found to harbor three open reading frames. Resequencing the open reading frames revealed that the mutant carried an allele at one of the three genes that differed from the wild-type sequence by 2-bp deletions; this gene encoded a cellulose synthase-like D4 (CSLD4) protein. Therefore, OsCSLD4 is a candidate gene for DNL3. DNL3 was expressed in all of the rice organs tested at the heading stage, particularly in the leaves, roots, and culms. These results suggest that DNL3 plays important roles in rice leaf morphogenesis and vegetative development.
Published: 2016

15. Interaction between CYP 2C19*3 polymorphism and smoking in relation to laryngeal carcinoma in the Chinese Han population

Author: S.-X. Liu, Y.-S. Zhao, Le-Qun Li, S.-Q. Tang, H.-B. Yang, and J. Feng
Subjects: Male, China, medicine.medical_specialty, CYP2C19, Gastroenterology, chemistry.chemical_compound, Asian People, Risk Factors, Internal medicine, Genotype, Ethnicity, Genetics, Carcinoma, Humans, Medicine, Genetic Predisposition to Disease, Laryngeal Neoplasms, Molecular Biology, Polymorphism, Genetic, biology, business.industry, Smoking, Cytochrome P450, Epistasis, Genetic, General Medicine, Odds ratio, Middle Aged, medicine.disease, Confidence interval, Cytochrome P-450 CYP2C19, Genetics, Population, Logistic Models, chemistry, Cancer cell, biology.protein, Female, Arachidonic acid, Aryl Hydrocarbon Hydroxylases, business
Abstract: Cytochrome P450 (CYP) 2C19 metabolizes arachidonic acid to biologically active epoxyeicosatrienoic acids, which strongly promote proliferation of cancer cells in vitro and in vivo. Knowing that smoking is the most important risk factor for laryngeal carcinoma, we examined the relationships between CYP2C19*3 polymorphism, smoking and laryngeal carcinoma in the Chinese Han population. In a Chinese Han case-control study of 300 laryngeal carcinoma patients and 300 healthy controls, we investigated polymorphism in the CYP2C19 gene by PCR-RFLP analysis. The CYP2C19*3 AG + AA genotype was significantly more prevalent in laryngeal carcinoma patients (6.67 vs 2.67%; P = 0.02). Multiple logistic regression analysis showed smoking (odds ratio (OR) = 6.353, 95% confidence interval (CI) = 4.413-9.144; P0.001) and alcohol consumption (OR = 2.607, 95%CI = 1.130-6.016; P = 0.025) as independent risk factors for laryngeal carcinoma; there was a significant interaction between CYP2C19*3 and smoking (OR = 17.842, 95%CI = 13.32-31.102; P = 0.009). We conclude that CYP2C19*3 polymorphism is significantly associated with laryngeal carcinoma in the Chinese Han population.
Published: 2011

16. Evidence of ψ(3770) non-DD¯ decay to J/ψπ+π−

Author: S. L. Zang, H. Shen, R. Y. Li, Y.R. Tian, Jing Wang, Y. B. Zhao, S.L. Olsen, S. D. Gu, M. H. Ye, Q. Yue, Cunfeng Wei, Yingchun Zhu, Ning Zhou, J. W. Zhang, L. S. Wang, Z. J. Lu, L. Y. Dong, D. Tian, S. X. Du, M. L. Yan, G. S. Varner, Feng Shi, X. S. Jiang, W. B. Yan, Xiru Huang, J. C. Chen, G. L. Tong, B. A. Zhuang, Bing Zhou, Jiawei Zhao, Zheng Wang, Zhenyu Zhang, N. Wu, K. Li, Z. J. Ke, Guangzhao Zhou, Jun-Bing Ma, Xingzhu Cui, B.S. Zou, S. Q. Zhang, Z. A. Liu, Y. Ban, W. X. Gong, J. Z. Bai, Y. Z. Sun, Y. N. Guo, W. D. Li, Qiyang Zhang, Z. Y. Wang, J. Fang, L. S. Zheng, M. He, X. Tang, Xuan Zhang, X. Y. Shen, H. J. Lu, J. G. Lu, H. H. Li, D. L. Shen, L. P. Zhou, J. Z. Wang, H. Y. Zhang, J. F. Chang, P. Wang, X. C. Meng, Haiwen Liu, H. M. Hu, L. P. Fu, Z. P. Mao, C. X. Liu, Y. M. Dai, F. C. Ma, Z.J. Guo, W. R. Zhao, Y. Jin, G. S. Huang, T. Hu, XZ（蔡翔舟） Cai, J. Ying, J. Nie, J. Y. Zhang, Yiyun Zhang, D. P. Jin, X. Q. Li, M. L. Gao, M. Y. Gong, C. F. Liu, S.S. Sun, Zujian Wang, Jiang Changhui, Y. X. Ye, J. W. Zhao, G. W. Yu, J. G. Bian, Yudan Wang, S. Q. Tang, D. X. Zhao, B. Y. Zhang, Jiemin Li, T. Hong, B. X. Zhang, Hao-Ze Chen, Y. K. Heng, Y. Y. Zhang, Y. Q. Guo, C. C. Zhang, X. C. Zhong, Y. B. Chen, D. H. Zhang, J. He, L. Huang, X. M. Xia, J. F. Qiu, F. Lu, Q. J. Li, Y. F. Lai, Z. A. Zhu, W. F. Wang, Zhiyun Zheng, H. Y. Fu, Y. S. Dai, C. S. Gao, C. S. Yu, G. F. Xu, X. H. Mo, Jinxing Zheng, K. L. He, P. P. Zhao, S. W. Han, Y. Yuan, Y. S. Zhu, J. M. Zhang, J. C. Li, Y. C. Zhu, Lei Zhang, G. Rong, S. D. Yang, P. L. Wang, Meng Wang, H. X. Yang, F. A. Harris, Zhe Wang, Y.N. Gao, L. L. Ma, Fei-Fei Liu, H. S. Chen, C. D. Qian, F. Y. Li, Y. Zeng, J. P. Liu, G. A. Yang, Z. G. Zhao, W. G. Li, Fang Liu, Z. J. Sun, X.S. Li, Q. M. Zhu, Z. D. Nie, Y. C. Xu, M. Z. Wang, E. C. Ma, H. S. Sun, Haiping Peng, X. H. He, Y. P. Chu, X. B. Ji, Gongru Lu, S. P. Chi, K. J. Zhu, J. M. Yuan, S. Jin, G. Li, C. D. Fu, S. T. Xue, X. L. Luo, L. W. Song, Y. J. Zhang, S. S. Fang, Y. B. Liu, R. B. Li, J. Yang, X. X. Xie, H. Y. Sheng, N. D. Qi, Z. Z. Du, Z. X. Liu, R. G. Liu, and J. B. Liu
Subjects: Physics, Nuclear and High Energy Physics, Partial width, Nuclear magnetic resonance, Branching fraction, Electron–positron annihilation, Atomic physics
Abstract: Evidence of ψ ( 3770 ) decays to a non- D D ¯ final state is observed. A total of 11.8 ± 4.8 ± 1.3 ψ ( 3770 ) → J / ψ π + π − events are obtained from a data sample of 27.7 pb−1 taken at center-of-mass energies around 3.773 GeV using the BES-II detector at the BEPC. The branching fraction is determined to be BF ( ψ ( 3770 ) → J / ψ π + π − ) = ( 0.34 ± 0.14 ± 0.09 ) % , corresponding to the partial width of Γ ( ψ ( 3770 ) → J / ψ π + π − ) = ( 80 ± 33 ± 23 ) keV .
Published: 2005

17. Measurements of the mass and full-width of the ηc meson

Author: Yudan Wang, B.S. Zou, S. Q. Tang, S. T. Xue, Qiyang Zhang, G. R. Lu, F. Li, F. C. Ma, Z. Y. Wang, Z. A. Zhu, P. Wang, Y. M. Dai, Z. D. Nie, J. F. Qiu, Q. M. Zhu, Y. C. Xu, M. Z. Wang, G. Li, Z. G. Zhao, Q. J. Li, H. S. Sun, N. Wu, J. Nie, C. F. Liu, Yingchun Zhu, L. Huang, Y. S. Dai, C. S. Gao, Jinxing Zheng, Z. J. Sun, E. C. Ma, J. G. Lu, C. D. Fu, Zheng Wang, Yang Tian, Haiping Peng, X. C. Lou, Y. Jin, Jing Wang, Y. B. Zhao, X. H. He, M. He, D. Paluselli, F. Lu, D. L. Shen, X.S. Li, S. D. Yang, T. Hu, X. C. Meng, H. M. Hu, XZ（蔡翔舟） Cai, J. C. Li, J. C. Chen, S. L. Zang, S. X. Du, Feng Shi, C. X. Liu, L. W. Song, Y. C. Zhu, S. D. Gu, T. Hong, M. L. Yan, K. Li, Q. Yue, P. L. Wang, J. Fang, L. S. Zheng, S.L. Olsen, L. S. Wang, Meng Wang, Guangzhao Zhou, M. L. Gao, Z. J. Guo, Jiawei Zhao, C. Z. Yuan, Y. Zeng, B. D. Jones, S.S. Sun, X. S. Jiang, Zhe Wang, C. D. Qian, Z. J. Ke, X. Tang, M. H. Ye, J. Z. Wang, D. P. Jin, F. A. Harris, Y. Yuan, Y. S. Zhu, Y. Q. Guo, Z. P. Zhang, Y. B. Chen, H. Shen, Chun-Hua Jiang, X. M. Xia, K. L. He, X. C. Zhong, S. W. Han, G. S. Varner, Zujian Wang, R. Y. Li, P. P. Zhao, D. H. Zhang, C. S. Yu, L. P. Fu, Y. F. Lai, L. Y. Dong, J. M. Zhang, H. F. Chen, Y. J. Zhang, W. F. Wang, X. Y. Shen, H. Y. Sheng, Houbing Lu, C. C. Zhang, H. Y. Fu, Cunfeng Wei, Ning Zhou, Lei Zhang, H. Y. Zhang, Bing Zhou, J. W. Zhang, Joseph Izen, G. Rong, M. Y. Gong, G. S. Huang, J. Ying, J. Y. Zhang, W. R. Zhao, F. Liu, G. F. Xu, W. Dunwoodie, N. D. Qi, Y. K. Heng, Y. Y. Zhang, S. Jin, Z. P. Zheng, Y. N. Gao, Y. N. Guo, D. Tian, J. G. Bian, H. S. Chen, J. F. Chang, Z. J. Lu, S. Q. Zhang, X. Q. Li, Y. Z. Sun, Z. A. Liu, Yiyun Zhang, Xiru Huang, G. L. Tong, B. A. Zhuang, Y. X. Ye, X. Y. Zhang, Y. Ban, B. X. Zhang, R. G. Liu, J. B. Liu, L. P. Zhou, Z. P. Mao, R. B. Li, Y. P. Chu, X. B. Ji, J. Z. Bai, J. Yang, S. S. Fang, Z. Z. Du, D. Kong, Z. X. Liu, S. P. Chi, Y. B. Liu, K. J. Zhu, J. M. Yuan, X. L. Luo, Jun-Bing Ma, J. J. He, W. X. Gong, X. X. Xie, H. X. Yang, J. P. Liu, G. A. Yang, W. G. Li, H. M. Liu, X. H. Mo, Xingzhu Cui, Jie Chen, W. D. Li, H. H. Li, J. W. Zhao, G. W. Yu, W. B. Yan, Fang Liu, D. X. Zhao, B. Y. Zhang, and Jiemin Li
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Meson, Electron–positron annihilation, Mass spectrum, Full width, High Energy Physics - Experiment
Abstract: In a sample of 58 million $J/\psi$ events collected with the BES II detector, the process J/$\psi\to\gamma\eta_c$ is observed in five different decay channels: $\gamma K^+K^-\pi^+\pi^-$, $\gamma\pi^+\pi^-\pi^+\pi^-$, $\gamma K^\pm K^0_S \pi^\mp$ (with $K^0_S\to\pi^+\pi^-$), $\gamma \phi\phi$ (with $\phi\to K^+K^-$) and $\gamma p\bar{p}$. From a combined fit of all five channels, we determine the mass and full-width of $\eta_c$ to be $m_{\eta_c}=2977.5\pm1.0 ({stat.})\pm1.2 ({syst.})$ MeV/$c^2$ and $\Gamma_{\eta_c} = 17.0\pm3.7 ({stat.})\pm7.4 ({syst.})$ MeV/$c^2$., Comment: 9 pages, 2 figures and 4 table. Submitted to Phys. Lett. B
Published: 2003
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18. The BES upgrade

Author: G. S. Huang, X. C. Meng, J. Y. Zhang, J. Standifird, W. G. Yan, J. Oyang, Jun-Bing Ma, J. Schultz, M.H. Kelsey, J. Z. Bai, L. S. Wang, B. Yang, P. Zhang, Y. K. Heng, Y. Y. Zhang, Jun Wang, Chunmei Zhang, J. Li, Joseph Izen, H. Luo, Y. Yuan, Y. S. Zhu, B. W. Shen, Y. Q. Chen, Hao-Ze Chen, Z.R. Wan, Z. Q. Xu, H. Y. Sheng, Jiming Yang, H.G. Han, M. G. Zhao, X.M. Chu, C. X. Yu, Qiyang Zhang, Y. W. Liu, P. Wang, H. S. Mao, Zhengguo Zhao, G. Y. Hu, T. J. Wang, N. D. Qi, W.H. Li, G. P. Chen, M. Mandelkern, C. Z. Yuan, L. Y. Dong, Xinchou Lou, He-Run Yang, S.T. Xu, C.S. Yang, H. Z. Shi, B. S. Cheng, H. M. Liu, Dehong Zhan, X. F. Song, D. P. Stoker, P. F. Lang, M. Weaver, Y.Y. Du, D. Paluselli, R. B. Li, Y.Y. Jiang, D. Kong, H.Y. Lu, Qian Liu, L. Zhang, L. Z. Wang, B. K. Kim, X. Q. Hu, Y. H. Xie, J. H. Gu, Ming-Han Ye, Qi Liu, T. Hu, M. L. Gao, C. C. Xu, H. W. Zhao, Y. K. Que, J. Chen, Li Zhou, H. M. Hu, Cheng-Kui Li, J. C. Chen, R. Malchow, D. X. Zhao, B. Y. Zhang, Jiurong Liu, Y. Z. Sun, Y. Y. Wang, J. Fang, L. S. Zheng, Wei Li, C. D. Qian, M. He, H. B. Li, W. Y. Ding, C. Y. Yang, X. Y. Shen, S. D. Gu, Yuanbo Chen, X. L. Luo, D. L. Shen, D.J. Yang, Z. Z. Du, S. J. Sun, Xingzhu Cui, Z. X. Liu, B. D. Jones, Y. H. Qu, W. J. Xiong, J. L. Hu, Yue-Yuan Zhang, Q. Xie, H. L. Ni, S. Q. Tang, C. M. Yang, G. S. Varner, Y. Jin, G. A. Yang, K. J. Zhu, W. X. Gu, W. H. Toki, X. Xiao, S.C. Zheng, S. Q. Gao, Z. J. Ke, Z. P. Zheng, W. Dunwoodie, Y. F. Lai, P. P. Xie, C.C. Zhong, X. Ju, G. L. Tong, B. A. Zhuang, H. Shen, X. H. Mo, J. F. Qiu, L.G. Mu, Y. P. Tan, P. Q. Li, W. G. Li, J.S. Lou, S. M. Wang, Junguang Lu, Cunfeng Wei, H. L. Ding, S. W. Han, R. G. Liu, Y. J. Sun, Frank C. Porter, Jun Liu, B. Schmid, Q. H. Hu, H. S. Zhou, P. Gratton, J. Panetta, Y. C. Zhu, X. M. Xia, Xingguo Li, F. Sun, Z. W. Chai, J. Zhao, X. F. Zhou, Meng Wang, F. A. Harris, H.C. Bao, D. M. Xi, J. Yan, Lin. Zhang, Y. H. Yu, G. Rong, Jiang Changhui, E. C. Ma, H. L. Zhang, Stephen L. Olsen, D. H. Zhang, C. S. Yu, A. J. Lankford, X. N. Li, D. G. Hitlin, J. H. Liu, Michael Schernau, W. Yang, J. Nie, Y. Y. Shao, C. S. Gao, Jinxing Zheng, J. D. Huang, F. Wang, Z. P. Mao, Q. M. Zhu, H. S. Sun, Z. Q. Yu, Y. N. Guo, F. Y. Li, J. W. Zhang, W. Z. Fang, B. Lowery, Y. B. Chen, Y. L. Han, S. Q. Luo, I. Blum, Y. Z. Huang, Q. Y. Li, J. He, S. Q. Zhang, W.L. Yao, G.P. Zho, L. J. Pan, Bing Zhou, W. R. Zhao, X. R. Qi, Yuehong Xie, H. B. Hu, P. L. Wang, and Xuan Yang
Subjects: Physics, Nuclear and High Energy Physics, Spectrometer, Physics::Instrumentation and Detectors, Detector, Solenoid, Particle accelerator, Computer Science::Digital Libraries, Computer Science::Computers and Society, Particle detector, law.invention, Nuclear physics, Upgrade, Beijing, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Collider, Instrumentation
Abstract: The Beijing Spectrometer (BES) detector is a general purpose solenoid detector at the Beijing Electron Positron Collider (BEPC) in Beijing, China, that has collected large numbers of J/ψ, ψ′, Ds, D and τ events. In this paper, we describe the recent upgrade of the initial BES detector (BESI) to the improved BESII detector.
Published: 2001

19. Measurement of the Total Cross Section for Hadronic Production bye+e−Annihilation at Energies between 2.6–5 GeV

Author: J. Z. Bai, Y. Ban, J. G. Bian, G. P. Chen, H. F. Chen, J. Chen, J. C. Chen, Y. Chen, Y. B. Chen, Y. Q. Chen, B. S. Cheng, X. Z. Cui, H. L. Ding, L. Y. Dong, Z. Z. Du, W. Dunwoodie, C. S. Gao, M. L. Gao, S. Q. Gao, J. H. Gu, S. D. Gu, W. X. Gu, Y. F. Gu, Y. N. Guo, Z. J. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, Y. K. Heng, G. Y. Hu, H. M. Hu, J. L. Hu, Q. H. Hu, T. Hu, X. Q. Hu, G. S. Huang, Y. Z. Huang, J. M. Izen, C. H. Jiang, Y. Jin, B. D. Jones, X. Ju, Z. J. Ke, D. Kong, Y. F. Lai, P. F. Lang, C. G. Li, D. Li, H. B. Li, J. Li, J. C. Li, P. Q. Li, R. B. Li, W. Li, W. G. Li, X. H. Li, X. N. Li, H. M. Liu, J. Liu, R. G. Liu, Y. Liu, X. C. Lou, F. Lu, J. G. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, H. S. Mao, Z. P. Mao, X. C. Meng, J. Nie, S. L. Olsen, D. Paluselli, L. J. Pan, N. D. Qi, X. R. Qi, C. D. Qian, J. F. Qiu, Y. H. Qu, Y. K. Que, G. Rong, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, X. Y. Shen, H. Y. Sheng, H. Z. Shi, X. F. Song, F. Sun, H. S. Sun, Y. Sun, Y. Z. Sun, S. Q. Tang, W. Toki, G. L. Tong, G. S. Varner, F. Wang, L. S. Wang, L. Z. Wang, M. Wang, P. Wang, P. L. Wang, S. M. Wang, T. J. Wang, Y. Y. Wang, C. L. Wei, N. Wu, Y. G. Wu, D. M. Xi, X. M. Xia, P. P. Xie, Y. Xie, Y. H. Xie, G. F. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, H. X. Yang, J. Yang, W. Yang, X. F. Yang, M. H. Ye, S. W. Ye, Y. X. Ye, C. S. Yu, C. X. Yu, G. W. Yu, Y. H. Yu, Z. Q. Yu, C. Z. Yuan, Y. Yuan, B. Y. Zhang, C. Zhang, C. C. Zhang, D. H. Zhang, Dehong Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. Zhang, L. S. Zhang, P. Zhang, Q. J. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Y. Zhang, D. X. Zhao, H. W. Zhao, Jiawei Zhao, J. W. Zhao, M. Zhao, W. R. Zhao, Z. G. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, B. Q. Zhou, G. P. Zhou, H. S. Zhou, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, and B. A. Zhuang
Subjects: Physics, Particle physics, Annihilation, Spectrometer, Electron–positron annihilation, Hadron, General Physics and Astronomy, Sigma, Particle accelerator, law.invention, Nuclear physics, Cross section (physics), law, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: Using the upgraded Beijing Spectrometer, we have measured the total cross section for e(+)e(-) annihilation into hadronic final states at center-of-mass energies of 2.6, 3.2, 3.4, 3.55, 4.6, and 5.0 GeV. Values of R, sigma(e(+)e(-)-->hadrons)/sigma(e(+)e(-)-->m(+)m(-)), are determined.
Published: 2000

20. Charmonium Decays to Axial-Vector Plus Pseudoscalar Mesons

Author: E. C. Ma, H. L. Zhang, R. B. Li, G. P. Chen, Michael Schernau, W. Yang, J. Nie, S. W. Han, M. L. Gao, Y. Y. Shao, F. Wang, Z. P. Mao, J. Panetta, Y. C. Zhu, D. Kong, G. W. Yu, S. D. Gu, S. Q. Tang, J. He, H. S. Zhou, C. S. Gao, Jinxing Zheng, Meng Wang, S. M. Wang, Junguang Lu, W. R. Zhao, J. T. He, A. J. Lankford, Dehong Zhang, G. S. Varner, X. R. Qi, Yuehong Xie, Z. Z. Du, Wei Li, X. Q. Hu, H. L. Ding, W. X. Gu, Z. Q. Yu, W. H. Toki, J. W. Zhang, Y. B. Chen, W. G. Li, Y. F. Gu, Qiyang Zhang, Y. W. Liu, P. L. Wang, X. N. Li, Y. F. Lai, Y. H. Xie, C. M. Yang, M. He, Y. N. Guo, D. L. Shen, Q. H. Hu, T. J. Wang, Yong Ban, J. F. Qiu, B. Lowery, Y. L. Han, G. Rong, Z. G. Zhao, P. Wang, Y. H. Qu, H. Shen, M. G. Zhao, Bing Zhou, Z. P. Zheng, P. F. Lang, Y. Jin, He Kai, X. C. Meng, J. Standifird, Stephen L. Olsen, Xingguo Li, G. P. Zhou, J. Chen, S. T. Xue, Jiang Changhui, Cheng-Kui Li, X. L. Luo, D. Li, X. Y. Shen, G. F. Xu, G. L. Tong, B. W. Shen, I. Blum, Q. M. Zhu, G. Y. Hu, J. L. Hu, B. A. Zhuang, Cunfeng Wei, Xuan Zhang, S. Q. Zhang, F. A. Harris, D. H. Zhang, J. Z. Bai, Y. G. Wu, Y. Z. Huang, Y. K. Que, Xuanhong Lou, R. Malchow, H. B. Li, J. Oyang, R. G. Liu, H. S. Mao, C. S. Yu, Hao-Ze Chen, H. S. Sun, H. Z. Shi, F. C. Porter, Jiming Yang, H. W. Zhao, K. J. Zhu, Li Zhou, H. M. Hu, L. S. Zheng, Yuanbo Chen, D. Paluselli, Y. J. Sun, H. Y. Sheng, F. Lu, X. F. Song, F. Sun, L. Y. Dong, B. S. Cheng, C. X. Yu, L. Z. Wang, C. C. Zhang, J. Y. Zhang, M. H. Kelsey, N. D. Qi, Y. Yuan, Y. H. Yu, Y. S. Zhu, P. Gratton, X. M. Xia, J. H. Gu, Y. Q. Chen, Y. Y. Zhang, Yangsen Ye, C. Y. Yang, C. D. Qian, Xuan Yang, C. Z. Yuan, D. M. Xi, L. J. Pan, Jiawei Zhao, J. Yan, L. S. Wang, M. H. Ye, S. Q. Gao, Z. J. Ke, P. P. Xie, P. Q. Li, B. K. Kim, W. G. Yan, J. P. Liu, Jun-Bing Ma, J. Li, Lei Zhang, Joseph Izen, J. W. Zhao, J. G. Bian, W. Dunwoodie, T. Hu, D. G. Hitlin, B. D. Jones, S. W. Ye, H. M. Liu, M. Weaver, D. X. Zhao, B. Y. Zhang, Y. Z. Sun, Y. Y. Wang, and Xingzhu Cui
Subjects: Physics, Particle physics, Meson, Branching fraction, High Energy Physics::Lattice, High Energy Physics::Phenomenology, FOS: Physical sciences, General Physics and Astronomy, High Energy Physics - Experiment, Pseudoscalar, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Pseudovector, Mathematical physics
Abstract: A sample of 3.79 million psi(2S) decays observed in the BES detector is used to study the decays of charmonium to axialvector plus pseudoscalar mesons. The branching fraction for psi(2S) to b1pi agrees with expectations. A contrasting behavior between the psi(2S) and the J/psi decays to K1K cannot be accommodated by an adjustment of the singlet-triplet axialvector mixing angle., 7 pages, 3 figures. Changes: excluded one figure, added information, systematic errors increased
Published: 1999

21. Partial wave analysis of J/ψ→γ(ηπ+π−)

Author: H. B. Li, B.S. Zou, C. C. Zhang, F. Sun, J. Nie, Y. C. Zhu, P. L. Wang, H. Shen, Meng Wang, Y. Y. Shao, Y. Jin, C. S. Gao, X. C. Meng, Jun-Bing Ma, S. T. Xue, Jinxing Zheng, Y. Yuan, Y. S. Zhu, G. Y. Hu, Cunfeng Wei, D.V. Bugg, J. C. Li, J. W. Zhang, J. G. Bian, J. T. He, P. P. Xie, G. P. Zhou, M. L. Gao, S. W. Ye, H. W. Zhao, J. F. Qiu, Y. G. Xie, G. P. Chen, Cheng-Kui Li, W. D. Li, J. G. Lu, Y. K. Que, P. Q. Li, H. M. Hu, Z. G. Zhao, Y. H. Yu, X. Q. Hu, Chun-Hua Jiang, C. Y. Yang, P. F. Lang, J. W. Zhao, G. W. Yu, Q. M. Zhu, Jiawei Zhao, S. D. Gu, D. X. Zhao, B. Y. Zhang, K. L. He, S. W. Han, B. W. Shen, E. C. Ma, Y. Y. Wang, Dehong Zhang, J. P. Liu, H. L. Zhang, T. Hu, S. Q. Gao, Z. J. Ke, H. S. Sun, X. N. Li, J. Y. Zhang, D. Li, Y. F. Gu, C. D. Qian, Xuan Yang, Y. B. Chen, H. S. Zhou, X. Y. Zhang, K. J. Zhu, H. Z. Shi, R. G. Liu, X. F. Song, W. G. Li, W. G. Yan, W. X. Gu, Y. J. Sun, H. L. Ding, L. Z. Wang, Y. F. Lai, Y. Ban, Y. Q. Chen, J. He, R. B. Li, M. He, A. V. Sarantsev, H. F. Chen, Y. X. Ye, Lei Zhang, Y. Y. Zhang, D. L. Shen, G. Rong, H. M. Liu, Y. H. Qu, X. H. Li, L. P. Zhou, F. Wang, Z. P. Mao, C. M. Yang, D. H. Zhang, C. S. Yu, D. M. Xi, J. Yan, Z. P. Zheng, X. L. Luo, M. G. Zhao, J. Z. Bai, Q. H. Hu, Z. Q. Yu, J. L. Hu, G. L. Tong, Z. Z. Du, B. A. Zhuang, Jiming Yang, X. M. Xia, T. J. Wang, Y. G. Wu, G. F. Xu, J. C. Chen, S. Q. Zhang, S. M. Wang, L. S. Zheng, H. Y. Sheng, Y. Z. Sun, C. X. Yu, N. D. Qi, X. Y. Shen, W. R. Zhao, Y. B. Liu, X. R. Qi, L. S. Wang, S. Q. Tang, M. H. Ye, H. S. Mao, L. Y. Dong, B. S. Cheng, J. H. Gu, Bing Zhou, F. Lu, Y. H. Xie, C. Z. Yuan, Qiyang Zhang, P. Wang, Y. Z. Huang, Y. N. Guo, Y. L. Han, and Xingzhu Cui
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Partial wave analysis, Electron–positron annihilation, Invariant mass, Atomic physics
Abstract: A partial wave analysis of BES J / ψ → γ ( ηπ + π − ) data has been performed in the mass region 1.1 to 2.0 GeV. A peak is observed due to η (1440) in the ηπ + π − invariant mass distribution; J P =0 − is preferred over 1 + . Its mass is M =1385±7 MeV and it decays into both ησ and a 0 (980) π , with BR[ a 0 (980) π , a 0 → ηπ / ησ ]=0.70±0.12( stat )±0.20( syst ). Destructive interference between the two decay modes is observed. In addition, in the higher ηπ + π − mass region, there is a definite 2 −+ signal, with M =1840±15 MeV and Γ =170±40 MeV and an additional 0 −+ signal at 1760±35 MeV. We also find a possible contribution from a 1 ++ signal decaying dominantly through a 0 (980) π ; its mass and width are fitted to be M =1505±20 MeV and Γ =130 −20 +50 MeV.
Published: 1999

22. ψ(2S)Hadronic Decays to Vector-Tensor Final States

Author: Xuan Yang, Z. Q. Yu, Q. H. Hu, Wei Li, J. H. Liu, J. W. Zhang, Y. S. Zhu, L. J. Pan, C. M. Yang, Y. B. Chen, Michael Schernau, W. Yang, W. G. Yan, F. Lu, L. Y. Ding, Q. J. Zhang, Z. P. Zheng, Lei Zhang, J. Nie, W. G. Li, J. C. Chen, G. L. Tong, B. A. Zhuang, Joseph Izen, T. J. Wang, C. G. Li, S. Feng, C. L. Wei, J. F. Qiu, Kai Yi, Y. Y. Shao, Hao-Ze Chen, Jiming Yang, H. S. Mao, L. Y. Dong, F. Wang, Z. P. Mao, D. X. Zhao, C. S. Gao, Dehong Zhang, B. Y. Zhang, B. S. Cheng, W. Dunwoodie, B. K. Kim, J. D. Huang, J. Panetta, Xuanhong Lou, R. Malchow, Y. Y. Wang, Y. C. Zhu, J. G. Bian, I. Blum, J. H. Gu, C. Z. Yuan, Lu Wang, J. T. He, C. H. Luo, Hai-Bo Li, H. M. Hu, Q. M. Zhu, Meng Wang, R. B. Li, J. M. Ma, Z. T. Yu, Xuan Zhang, Yuanbo Chen, X. C. Meng, J. He, J. Standifird, S. T. Xue, L. S. Zheng, Yi Jin, Y. W. Liu, L. S. Wang, M. H. Ye, P. F. Lang, Y. Z. Huang, Jie Zhang, B. W. Shen, Y. K. Que, S. W. Han, J. Chen, T. Hu, G. Y. Hu, M. Wang, E. C. Ma, C. D. Qian, Li Zhou, H. S. Sun, J. Oyang, J. P. Liu, A. M. Ma, H. S. Zhou, Chunmei Zhang, J. Li, D. G. Hitlin, X. Y. Shen, F. A. Harris, D. Li, H. L. Zhang, P. Gratton, X. M. Xia, Z. W. Chai, G. Rong, C. H. Jiang, Da-Hua Zhang, Y. Yuan, Y. H. Yu, M. G. Zhao, R. G. Liu, F. C. Porter, D. Paluselli, Yangsen Ye, H. W. Zhao, M. L. Gao, B. Lowery, S. W. Ye, S. Q. Tang, S. D. Gu, H. Z. Shi, S. Q. Gao, Z. J. Ke, Junqiang Zhang, P. P. Xie, H. M. Liu, M. Weaver, X. F. Song, J. W. Zhao, G. P. Chen, H. Shen, X. Q. Hu, Z. G. Zhao, W. R. Zhao, P. Q. Li, C. Y. Yang, Y. F. Gu, X. R. Qi, Y. L. Han, Y. H. Qu, Y. F. Lai, Y. Zhang, Yuehong Xie, Shun-Qi Zhang, M. He, D. L. Shen, X. Z. Cui, P. L. Wang, M. H. Kelsey, Stephen L. Olsen, L. C. Lu, W. J. Xiong, Y. Y. Zhang, W. X. Gu, C. S. Yu, W. H. Toki, Jianping Zheng, D. M. Xi, J. Yan, A. J. Lankford, G. F. Xu, F. Sun, X. N. Li, Y. N. Guo, H. L. Ding, Xingguo Li, G. P. Zhou, J. Y. Lu, D. Kong, S. M. Wang, Junguang Lu, Y. H. Xie, C. C. Xu, Y. Q. Chen, J. L. Hu, Y. G. Wu, Z. Z. Du, H. Y. Sheng, C. X. Yu, N. D. Qi, and J. Z. Bai
Subjects: Physics, Particle physics, Branching fraction, Hadron, General Physics and Astronomy, Mathematical physics
Abstract: Author(s): Bai, JZ; Bian, JG; Blum, I; Chai, ZW; Chen, GP; Chen, HF; Chen, J; Chen, JC; Chen, Y; Chen, YB; Chen, YQ; Cheng, BS; Cui, XZ; Ding, HL; Ding, LY; Dong, LY; Du, ZZ; Dunwoodie, W; Feng, S; Gao, CS; Gao, ML; Gao, SQ; Gratton, P; Gu, JH; Gu, SD; Gu, WX; Gu, YF; Guo, YN; Han, SW; Han, Y; Harris, FA; He, J; He, JT; He, M; Hitlin, DG; Hu, GY; Hu, HM; Hu, JL; Hu, QH; Hu, T; Hu, XQ; Huang, JD; Huang, YZ; Izen, JM; Jiang, CH; Jin, Y; Ke, ZJ; Kelsey, MH; Kim, BK; Kong, D; Lai, YF; Lang, PF; Lankford, A; Li, CG; Li, D; Li, HB; Li, J; Li, PQ; Li, RB; Li, W; Li, WD; Li, WG; Li, XH; Li, XN; Liu, HM; Liu, J; Liu, JH; Liu, RG; Liu, Y; Lou, XC; Lowery, B; Lu, F; Lu, JG; Lu, JY; Lu, LC; Luo, CH; Ma, AM; Ma, EC; Ma, JM; Malchow, R; Mao, HS; Mao, ZP; Meng, XC; Nie, J; Olsen, SL | Abstract: The decays of the ψ(2S) into vector plus tensor meson final states have been studied for the first time using the BES detector. We determine upper limits on branching fractions for ψ(2S) decays into ωf2, ρa2, K*0K*02 + c.c., and φf'2(1525) that are, in each case, significantly smaller than the corresponding branching fractions for the J/ψ meson, scaled according to the expectations of perturbative QCD. © 1998 The American Physical Society.
Published: 1998

23. Study of theP-Wave Charmonium StateχcJinψ(2S)Decays

Author: W. R. Zhao, Y. L. Han, Xingzhu Cui, Z. T. Yu, X. R. Qi, Y. Zhang, H. Z. Shi, L. C. Lu, J. F. Qiu, J. L. Hu, X. F. Song, J. L. Zhang, B. K. Kim, F. Sun, L. Z. Wang, Y. Jin, Qiyang Zhang, M. H. Kelsey, J. Panetta, Y. C. Zhu, C. H. Luo, P. L. Wang, Meng Wang, S. D. Gu, P. Wang, X. C. Meng, J. Standifird, S. Q. Zhang, E. C. Ma, H. L. Zhang, R. B. Li, J. G. Lu, G. F. Xu, Y. X. Ye, H. W. Zhao, M. L. Gao, H. S. Mao, T. Hu, G. P. Chen, J. C. Li, L. Y. Dong, P. F. Lang, G. P. Zhou, W. G. Li, D. Li, F. Lu, Kai Yi, G. S. Varner, M. G. Zhao, W. D. Li, S. Q. Tang, B. S. Cheng, Y. Yuan, Y. H. Yu, Y. S. Zhu, Y. N. Guo, D. M. Xi, S. W. Ye, H. Shen, X. Q. Hu, M. Weaver, W. X. Gu, J. Yan, Cheng-Kui Li, Y. B. Chen, C. Y. Yang, X. Y. Zhang, D. G. Hitlin, J. H. Gu, Y. F. Gu, R. G. Liu, J. T. He, M. He, B. W. Shen, Y. F. Lai, H. F. Chen, W. H. Toki, J. G. Bian, D. L. Shen, I. Blum, W. J. Xiong, Cunfeng Wei, J. Z. Bai, J. W. Zhao, Stephen L. Olsen, Z. Q. Yu, Wei Li, F. A. Harris, Chun-Hua Jiang, S. W. Han, H. M. Liu, Y. Z. Huang, C. M. Yang, Z. Z. Du, J. Oyang, Jun-Bing Ma, L. J. Pan, J. W. Zhang, Xuan Yang, L. Y. Ding, Chang-Zheng Yuan, F. C. Porter, T. J. Wang, D. H. Zhang, C. S. Yu, H. B. Li, H. L. Ding, A. M. Ma, H. S. Zhou, D. Paluselli, A. J. Lankford, P. Gratton, D. X. Zhao, L. S. Wang, C. C. Zhang, B. Y. Zhang, M. H. Ye, X. M. Xia, Z. W. Chai, W. Dunwoodie, W. G. Yan, S. Feng, Jiming Yang, J. Y. Zhang, Y. Y. Wang, X. Y. Shen, H. Y. Sheng, Lei Zhang, J. He, C. X. Yu, S. Q. Gao, Z. J. Ke, D. Kong, N. D. Qi, Z. G. Zhao, S. M. Wang, Z. P. Zheng, Y. H. Qu, Joseph Izen, G. Rong, Y. G. Xie, L. P. Zhou, F. Wang, Y. Y. Zhang, Z. P. Mao, Y. K. Que, Q. H. Hu, P. P. Xie, G. L. Tong, B. A. Zhuang, J. Chen, H. M. Hu, J. C. Chen, Xuanhong Lou, R. Malchow, P. Q. Li, L. S. Zheng, Y. G. Wu, C. D. Qian, J. P. Liu, Y. Q. Chen, X. H. Li, J. Y. Lu, Y. H. Xie, C. C. Xu, Y. B. Liu, Q. M. Zhu, M. Z. Wang, H. S. Sun, X. N. Li, B. Lowery, J. H. Liu, Michael Schernau, W. Yang, J. Nie, Y. Y. Shao, C. S. Gao, Jinxing Zheng, J. D. Huang, S. T. Xue, G. Y. Hu, and Dehong Zhang
Subjects: Physics, Stereochemistry, Branching fraction, Quantum mechanics, General Physics and Astronomy
Abstract: Author(s): Bai, JZ; Bian, JG; Blum, I; Chai, ZW; Chen, GP; Chen, HF; Chen, J; Chen, JC; Chen, Y; Chen, YB; Chen, YQ; Cheng, BS; Cui, XZ; Ding, HL; Ding, LY; Dong, LY; Du, ZZ; Dunwoodie, W; Feng, S; Gao, CS; Gao, ML; Gao, SQ; Gratton, P; Gu, JH; Gu, SD; Gu, WX; Gu, YF; Guo, YN; Han, SW; Han, Y; Harris, FA; He, J; He, JT; He, M; Hitlin, DG; Hu, GY; Hu, HM; Hu, JL; Hu, QH; Hu, T; Hu, XQ; Huang, JD; Huang, YZ; Izen, JM; Jiang, CH; Jin, Y; Ke, ZJ; Kelsey, MH; Kim, BK; Kong, D; Lai, YF; Lang, PF; Lankford, A; Li, CG; Li, D; Li, HB; Li, J; Li, PQ; Li, RB; Li, W; Li, WD; Li, WG; Li, XH; Li, XN; Liu, HM; Liu, J; Liu, JH; Liu, RG; Liu, Y; Lou, XC; Lowery, B; Lu, F; Lu, JG; Lu, JY; Lu, LC; Luo, CH; Ma, AM; Ma, EC; Ma, JM; Malchow, R; Mao, HS; Mao, ZP; Meng, XC; Nie, J; Olsen, SL | Abstract: The processes ψ(2S) → I π+ π−, γK+ K−, and γpp¯ have been studied using a sample of 3.79 × 106 ψ(2S) decays. We determine the total width of the χc0 to be γtotχc0 = 14.3 ± 2.0 ± 3.0 MeV. We present the first measurement of the branching fraction B(χc0 → pp¯) = (15.9 ± 4.3 ± 5.3) × 10−5, where the first error is statistical and the second one is systematic. Branching fractions of χc0, 2 → π+ π− and K+ K− are also reported. © 1998 American Physical Society.
Published: 1998

24. Experimental Study ofJ/ψRadiative Decay toπ0π0

Author: J. H. Liu, R. B. Li, J. Nie, Y. Y. Shao, C. S. Gao, D. Li, Jinxing Zheng, J. D. Huang, Q. H. Hu, X. Y. Zhang, R. G. Liu, Y. Yuan, Y. H. Yu, Y. S. Zhu, H. L. Ding, H. Shen, Q. M. Zhu, S. D. Gu, M. Z. Wang, H. S. Sun, X. N. Li, Miao He, Jun-Bing Ma, D. X. Zhao, B. Y. Zhang, Y. Y. Wang, Jie Zhang, L. P. Zhou, F. Wang, Cunfeng Wei, T. J. Wang, Qiyang Zhang, J. Y. Lu, S. T. Xue, D. M. Xi, J. Yan, Z. P. Mao, S. Feng, Y. H. Xie, S. W. Ye, J. P. Liu, H. Z. Shi, X. Q. Hu, Y. F. Gu, J. F. Qiu, X. F. Song, W. X. Gu, Z. Q. Yu, J. G. Lu, G. Y. Hu, C. D. Qian, F. Sun, C. C. Xu, S. M. Wang, L. Z. Wang, Xingzhu Cui, M. L. Gao, T. Hu, P. Wang, D. L. Shen, Y. B. Liu, Z. T. Yu, G. P. Zhou, J. T. He, J. Z. Bai, Y. B. Chen, Y. X. Ye, H. W. Zhao, J. C. Chen, Y. H. Qu, Cheng-Kui Li, W. J. Xiong, X. Y. Shen, Y. F. Lai, P. P. Xie, Chun-Hua Jiang, H. F. Chen, B. W. Shen, Y. Q. Chen, Z. Z. Du, J. G. Bian, Y. C. Zhu, C. Y. Yang, Y. Jin, X. H. Li, C. H. Luo, P. L. Wang, P. Q. Li, Xuan Yang, S. Q. Tang, W. G. Li, Y. G. Xie, Y. K. Que, L. S. Zheng, Meng Wang, H. M. Hu, W. G. Yan, H. M. Liu, Lei Zhang, J. L. Hu, G. Rong, Y. G. Wu, P. F. Lang, F. Lu, J. Y. Zhang, D. H. Zhang, C. S. Yu, J. He, H. Y. Sheng, G. F. Xu, E. C. Ma, H. L. Zhang, C. X. Yu, N. D. Qi, S. W. Han, Dehong Zhang, Y. Y. Zhang, J. C. Li, A. M. Ma, H. S. Zhou, M. G. Zhao, C. Z. Yuan, H. B. Li, X. M. Xia, C. C. Zhang, Z. W. Chai, Z. G. Zhao, J. W. Zhang, Z. J. Guo, S. Q. Gao, Z. J. Ke, Jiming Yang, Y. Z. Huang, J. W. Zhao, Z. P. Zheng, G. P. Chen, W. D. Li, W. R. Zhao, Y. N. Guo, G. L. Tong, B. A. Zhuang, Y. L. Han, L. C. Lu, H. S. Mao, X. R. Qi, L. Y. Dong, Y. Zhang, B. S. Cheng, J. H. Gu, C. M. Yang, Kai Yi, Wei Li, L. S. Wang, M. H. Ye, S. Q. Zhang, and X. C. Meng
Subjects: Nuclear physics, Physics, Electron–positron annihilation, Radiative decay, General Physics and Astronomy, Atomic physics
Published: 1998

25. Evidence for the leptonic decay D→μν

Author: J. Panetta, O. Bardon, S. M. Chen, Y. C. Zhu, E. Soderstrom, Wei Li, K. K. Young, P. L. Wang, X. F. Zhou, H. Y. Sheng, L. J. Pan, C. X. Yu, Q. Liu, Y. Luo, N. D. Qi, Michael J. Fero, Q. Y. Li, C. M. Yang, G. Zioulas, S. Q. Zhang, J. He, Chun-Hua Jiang, R. B. Li, H. S. Mao, S. Z. Lin, W. R. Zhao, H. W. Zhao, J. C. Li, Y. Zhang, S. Whittaker, J. G. Lu, F. A. Harris, L. Jones, T. H. Burnett, D. Kong, Y. P. Tan, S. Q. Tang, Y. H. Zhou, X. R. Shi, Z. P. Zheng, R. J. Wilson, D. H. Zhang, C. S. Yu, B. S. Cheng, G. P. Chen, S. Jin, L. P. Zhou, F. Wang, T. Hu, C. Y. Yang, Z. Z. Du, S. J. Sun, S. M. Wang, R. Cowan, Z. P. Mao, D. Z. Xu, G. L. Tong, W. D. Li, E. Prabhakar, J. H. Gu, X. C. Meng, B. A. Zhuang, F. Li, J. Standifird, H. L. Ni, R. G. Liu, J. Schultz, Xingzhu Cui, A. J. Lankford, B. Schmid, S. H. Kang, P. F. Lang, R. K. Yamamoto, G. P. Zhou, D. Q. Huang, D. G. Hitlin, Z. A. Liu, H. Shen, M. Mandelkern, C. Z. Yuan, Y. L. Han, A. J. S. Smith, Y. Jin, Q. P. Jia, Cunfeng Wei, J. Y. Zhang, E. Torrence, A. Breakstone, L. S. Wang, M. H. Ye, R. S. Xu, C. C. Zhang, S. T. Xue, X. L. Fan, B. K. Kim, P. Gratton, Y. S. Zhu, H. L. Ding, J. Z. Bai, W. G. Yan, Y. K. Que, X. M. Xia, J. W. Zhang, Y. Y. Zhang, M. L. Gao, J. W. Zhao, E. C. Ma, T. J. Wang, Z. Q. Xu, Lei Zhang, X. Q. Hu, Z. Q. Yu, D. Paluselli, Joseph Izen, H. L. Zhang, Y. F. Gu, G. Rong, H. Z. Shi, D. M. Xi, W. J. Wisniewski, Y. B. Chen, J. Yan, D. X. Zhao, B. Y. Zhang, M. He, J. Synodinos, Y. F. Lai, H. F. Chen, D. P. Stoker, J. C. Chen, D. L. Shen, Y. Y. Wang, R. Malchow, X. F. Song, X. Y. Shen, Jun-Bing Ma, J. Quigley, J. Oyang, J. Fang, L. S. Zheng, S. Q. Gao, Z. J. Ke, S. J. Chen, L. Z. Wang, S. D. Gu, G. Y. Hu, B. Lowery, M. H. Kelsey, M. G. Zhao, W. Dunwoodie, F. Sun, Q. M. Zhu, S. W. Han, M. Z. Wang, S. Q. Luo, H. S. Sun, X. N. Li, I. Blum, X. C. Lou, A. M. Ma, H. S. Zhou, J. H. Liu, Y. Z. Huang, Michael Schernau, W. Yang, F. C. Porter, J. Nie, Y. Y. Shao, C. S. Gao, Jinxing Zheng, W. X. Gu, Y. N. Guo, S. L. Olsen, W. H. Toki, H. B. Lan, S. Z. Ye, M. Hatanaka, P. P. Xie, P. Q. Li, W. G. Li, H. M. Liu, P. Wang, Y. B. Liu, Y. Q. Chen, and X. H. Li
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Branching fraction, Electron–positron annihilation, Nuclear physics, Pseudoscalar, D meson, High Energy Physics::Experiment, Center of mass, Exponential decay, Neutrino, Nuclear Experiment
Abstract: Purely leptonic decays of the charged D meson have been studied using the reaction e + e − →D ∗+ D − at a center of mass energy of 4.03 GeV. A search was performed for D→μνμ recoiling against a D0 or D+ which had been reconstructed from its hadronic decay products. A single event candidate was found in the reaction e + e − →D ∗+ D − , where D ∗+ →π + D 0 with the D0→K−π+, and the recoiling D− decaying via D − →μ − ν μ . This yields a branching fraction value B(D→μνμ)=0.08−0.05−0.02+0.16+0.05%, and a corresponding value of the pseudoscalar decay constant fD=300−150−40+180+80 MeV.
Published: 1998

26. Decays of the J/ψ to and final states

Author: Z. Q. Yu, Xingzhu Cui, Z. T. Yu, Y. B. Chen, H. S. Mao, W. H. Zhao, Kai Yi, L. Y. Dong, B. S. Cheng, Qiyang Zhang, S. D. Gu, Y. Q. Chen, Y. G. Xie, Y. K. Que, H. M. Hu, W. X. Gu, Jun-Bing Ma, P. Wang, S. T. Xue, J. C. Chen, X. H. Li, H. Y. Sheng, Y. H. Qu, J. H. Gu, C. X. Yu, G. Y. Hu, C. D. Qian, S. Feng, T. J. Wang, X. C. Meng, N. D. Qi, L. P. Zhou, F. Wang, L. S. Zheng, Xuan Yang, J. Y. Lu, Z. P. Mao, S. M. Wang, Y. Jin, H. Z. Shi, D. Li, J. G. Lu, Y. H. Xie, X. F. Song, W. G. Yan, Wei Li, F. Lu, C. C. Xu, H. W. Zhao, P. F. Lang, G. P. Zhou, S. Q. Zhang, L. Z. Wang, Y. B. Liu, X. Y. Zhang, Dehong Zhang, S. W. Ye, R. G. Liu, M. G. Zhao, X. Y. Shen, Lei Zhang, Cheng-Kui Li, L. Y. Ding, J. Z. Bai, J. L. Hu, Y. Yuan, Y. S. Zhu, Y. Z. Huang, S. Q. Tang, C. Y. Yang, G. Rong, Y. G. Wu, Y. X. Ye, J. F. Qiu, T. Hu, Z. Z. Du, J. He, J. Y. Zhang, L. S. Wang, R. B. Li, C. M. Yang, Y. Y. Zhang, M. H. Ye, C. Z. Yuan, S. W. Han, D. X. Zhao, B. Y. Zhang, H. L. Ding, B. W. Shen, W. R. Zhao, Y. Y. Wang, J. G. Bian, A. M. Ma, H. S. Zhou, D. M. Xi, X. R. Qi, Y. Zhang, J. Yan, Z. P. Zheng, Y. N. Guo, Y. L. Han, L. C. Lu, J. L. Zhang, J. T. He, S. Q. Gao, Z. J. Ke, H. Shen, G. L. Tong, Y. H. Yu, B. A. Zhuang, J. W. Zhao, Cunfeng Wei, Chun-Hua Jiang, Q. H. Hu, J. W. Zhang, Jiming Yang, M. L. Gao, F. Sun, G. P. Chen, W. D. Li, Y. F. Lai, H. F. Chen, D. H. Zhang, C. S. Yu, H. B. Li, E. C. Ma, H. L. Zhang, C. C. Zhang, J. P. Liu, J. C. Li, P. P. Xie, P. Q. Li, W. G. Li, H. M. Liu, Z. G. Zhao, X. M. Xia, Z. W. Chai, X. Q. Hu, Y. F. Gu, M. He, D. L. Shen, W. J. Xiong, J. H. Liu, G. F. Xu, J. Nie, Y. Y. Shao, C. S. Gao, Y. C. Zhu, C. H. Luo, P. L. Wang, Jinxing Zheng, J. D. Huang, Meng Wang, Q. M. Zhu, M. Z. Wang, H. S. Sun, and X. N. Li
Subjects: Physics, Nuclear and High Energy Physics, Angular distribution, Atomic physics, Branching (polymer chemistry)
Abstract: With 7.8 million produced J / ψ events collected by the BES detector at the BEPC, decays J/ψ→Λ Λ ,Λ Λ γ and Λ Λ π 0 are analysed. The branching ratios are measured to be Br (J/ψ→Λ Λ )=(1.08±0.06±0.24)×10 −3 , Br (J/ψ→Λ Λ γ) −4 (90% C.L. ) , Br (J/ψ→Λ Λ π 0 )=(2.3±0.7±0.8)×10 −4 , respectively. The angular distribution for J/ψ→Λ Λ is of the form d N d cos θ =N 0 (1+α cos 2 θ) , from which we determine α =0.52±0.33±0.13.
Published: 1998

27. Search forψ(2S)production ine+e−annihilations at 4.03 GeV

Author: C. C. Zhang, J. G. Lu, H. Z. Shi, T. Hu, C. M. Yang, X. F. Song, Y. Jin, T. J. Wang, P. F. Lang, D. Kong, L. Z. Wang, Qiyang Zhang, Y. Q. Chen, Dehong Zhang, P. P. Xie, M. H. Kelsey, D. G. Hitlin, S. M. Wang, E. C. Ma, X. H. Li, J. Panetta, I. Blum, H. L. Zhang, J. He, Z. P. Zheng, Q. H. Hu, Y. C. Zhu, R. B. Li, P. Wang, S. W. Ye, P. Q. Li, H. W. Zhao, C. H. Luo, Y. X. Ye, X. Y. Shen, M. Weaver, G. P. Zhou, J. W. Zhao, W. G. Li, Cheng-Kui Li, P. L. Wang, M. G. Zhao, D. M. Xi, Meng Wang, Y. Z. Huang, J. Yan, H. S. Mao, J. L. Hu, S. T. Xue, F. C. Porter, D. P. Stoker, J. Oyang, L. Y. Dong, S. Q. Gao, Z. J. Ke, F. Sun, B. S. Cheng, S. W. Han, Y. G. Wu, H. M. Liu, L. P. Zhou, G. Y. Hu, F. Lu, G. L. Tong, D. Paluselli, D. X. Zhao, S. Q. Tang, B. W. Shen, B. A. Zhuang, F. Wang, B. Y. Zhang, X. C. Meng, S. Q. Zhang, A. M. Ma, Z. P. Mao, J. Standifird, J. C. Chen, Xuanhong Lou, R. Malchow, B. Lowery, J. T. He, J. C. Li, H. S. Zhou, Y. G. Xie, Y. K. Que, J. Chen, H. M. Hu, Y. Y. Wang, J. H. Gu, J. Schultz, H. L. Ding, Chun-Hua Jiang, Y. L. Han, F. A. Harris, Jiming Yang, L. S. Zheng, W. Dunwoodie, S. D. Gu, J. H. Liu, Xingzhu Cui, L. C. Lu, J. Y. Lu, Michael Schernau, W. Yang, J. F. Qiu, Stephen L. Olsen, J. Y. Zhang, Kai Yi, M. Mandelkern, L. S. Wang, J. L. Zhang, J. Nie, C. Z. Yuan, M. H. Ye, Y. H. Xie, J. P. Liu, G. P. Chen, Y. Yuan, D. H. Zhang, Z. Q. Yu, Y. H. Yu, Y. S. Zhu, C. C. Xu, M. L. Gao, Y. Y. Shao, H. Shen, C. S. Yu, W. D. Li, D. Li, C. S. Gao, Y. H. Qu, W. X. Gu, Y. B. Liu, Y. Y. Zhang, Jinxing Zheng, J. D. Huang, S. Feng, A. J. Lankford, Y. B. Chen, X. Y. Zhang, W. H. Toki, Wei Li, Cunfeng Wei, R. G. Liu, Q. M. Zhu, Y. F. Lai, L. J. Pan, H. F. Chen, W. R. Zhao, B. Schmid, J. W. Zhang, L. Y. Ding, M. Z. Wang, X. R. Qi, Y. Zhang, Y. N. Guo, H. S. Sun, X. N. Li, H. Y. Sheng, C. X. Yu, N. D. Qi, X. Q. Hu, Y. F. Gu, M. He, D. L. Shen, W. J. Xiong, P. Gratton, Z. Z. Du, X. M. Xia, Z. W. Chai, G. F. Xu, J. Z. Bai, Xuan Yang, W. G. Yan, B. K. Kim, Lei Zhang, Joseph Izen, G. Rong, Jun-Bing Ma, Z. T. Yu, C. D. Qian, C. Y. Yang, J. G. Bian, and H. B. Li
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Photon, Electron, Radiation, law.invention, Nuclear physics, Positron, law, Metastability, High Energy Physics::Experiment, Production (computer science), Collider
Abstract: A search is performed for the production of the ψ(2S) in e^+e^- annihilation at a center-of-mass energy of 4.03 GeV using the BES detector operated at the Beijing Electron Positron Collider (BEPC). The kinematic features of the reconstructed ψ(2S) signal are consistent with its being produced only in association with an energetic photon resulting from initial state radiation (ISR). Limits are placed on ψ(2S) production from the decay of unknown charmonia or metastable hybrids that might be produced in e^+e^- annihilations at 4.03 GeV. Under the assumption that the observed cross section for ψ(2S) production is due entirely to ISR, the partial width Γ_(ee) of the ψ(2S) is measured to be 2.07±0.32keV.
Published: 1998

28. Direct measurement ofB(Ds+→φX+)

Author: J. Z. Bai, O. Bardon, I. Blum, A. Breakstone, T. Burnett, G. P. Chen, H. F. Chen, J. Chen, S. J. Chen, S. M. Chen, Y. Chen, Y. B. Chen, Y. Q. Chen, B. S. Cheng, R. F. Cowan, X. Z. Cui, H. L. Ding, Z. Z. Du, W. Dunwoodie, X. L. Fan, J. Fang, C. S. Gao, M. L. Gao, S. Q. Gao, P. Gratton, J. H. Gu, S. D. Gu, W. X. Gu, Y. F. Gu, Y. N. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, M. He, D. G. Hitlin, G. Y. Hu, T. Hu, X. Q. Hu, D. Q. Huang, Y. Z. Huang, J. M. Izen, C. H. Jiang, S. Jin, Y. Jin, L. Jones, S. H. Kang, Z. J. Ke, M. H. Kelsey, B. K. Kim, D. Kong, Y. F. Lai, H. B. Lan, P. F. Lang, A. Lankford, F. Li, J. Li, P. Q. Li, Q. Li, R. B. Li, W. Li, W. D. Li, W. G. Li, X. H. Li, X. N. Li, S. Z. Lin, H. M. Liu, J. Liu, J. H. Liu, Q. Liu, R. G. Liu, Y. Liu, Z. A. Liu, X. C. Lou, B. Lowery, J. G. Lu, J. Y. Lu, S. Luo, Y. Luo, A. M. Ma, E. C. Ma, J. M. Ma, R. Malchow, M. Mandelkern, H. S. Mao, Z. P. Mao, X. C. Meng, H. L. Ni, J. Nie, S. L. Olsen, J. Oyang, D. Paluselli, L. J. Pan, J. Panetta, F. Porter, E. Prabhakar, N. D. Qi, Y. K. Que, G. Rong, M. Schernau, B. Schmid, J. Schultz, Y. Y. Shao, D. L. Shen, H. Shen, X. Y. Shen, H. Y. Sheng, H. Z. Shi, E. Soderstrom, X. F. Song, J. Standifird, D. Stoker, F. Sun, H. S. Sun, S. J. Sun, J. Synodinos, Y. P. Tan, S. Q. Tang, W. Toki, G. L. Tong, F. Wang, L. S. Wang, L. Z. Wang, M. Wang, P. Wang, P. L. Wang, S. M. Wang, T. J. Wang, Y. Y. Wang, M. Weaver, C. L. Wei, W. J. Wisniewski, D. M. Xi, X. M. Xia, P. P. Xie, D. Z. Xu, R. S. Xu, Z. Q. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, H. Yang, W. Yang, M. H. Ye, S. Z. Ye, K. Young, C. S. Yu, C. X. Yu, Z. Q. Yu, C. Z. Yuan, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. S. Zhang, S. Q. Zhang, Y. Zhang, Y. Y. Zhang, D. X. Zhao, J. W. Zhao, M. Zhao, W. R. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, G. P. Zhou, H. S. Zhou, L. Zhou, X. F. Zhou, Y. H. Zhou, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, and B. A. Zhuang
Subjects: Hadronic decay, Nuclear physics, Physics, Nuclear and High Energy Physics, Pair production, Luminosity (scattering theory), Branching fraction
Abstract: The absolute inclusive branching fraction of D_s^+→φX^+ has been measured from data collected by the BES detector at a center-of-mass energy of 4.03 GeV, corresponding to an integrated luminosity of 22.3 pb^(-1). At this energy, direct pair production e^+e^-→D_s^+D_s^- has been observed. We have selected D_s candidate events by reconstructing five hadronic decay modes D_s^+→φπ^+, K^(0*)K^+, K^0K^+, f0^(π+) and K^0K^-π^+π^+ and have searched for inclusive φ’s in the recoiling D_s^-. We observed three recoiling φ’s in the 166.4 ± 31.8 D_s candidate events, which leads to the absolute branching fraction B(D_s^+→φX^+)=(17.8(-7.2 -6.3)^(+15.1+0.6)) % and B(D_s-6.3+→φπ-6.3+)=(3.6_(-1.6 -1.3)(^_3.1+0.4) %. [S0556-2821(97)02423-5]
Published: 1998

29. Measurement of the branching fraction ofDsinclusive semileptonic decayDs+→e+X

Author: O. Bardon, J. Y. Lu, Q. P. Jia, J. C. Li, Kai Yi, L. Zhang, B. W. Shen, Michael J. Fero, Y. B. Liu, J. Panetta, P. F. Lang, X. C. Meng, F. A. Harris, C. C. Zhang, S. M. Chen, Y. C. Zhu, Y. Luo, J. T. He, X. Q. Hu, J. Standifird, C. M. Yang, Jun Wang, Y. Q. Chen, X. H. Li, Y. F. Gu, M. L. Gao, S. Z. Lin, W. R. Zhao, M. He, P. L. Wang, Meng Wang, S. D. Gu, X. L. Fan, D. L. Shen, Jun-Bing Ma, H. B. Lan, Y. Zhang, W. J. Xiong, Z. P. Zheng, Dehong Zhang, J. L. Hu, Y. G. Wu, Qiyang Zhang, Y. Jin, L. Jones, Chun-Hua Jiang, Y. B. Chen, E. Soderstrom, B. Lowery, Z. Q. Yu, S. Q. Tang, J. G. Lu, Z. Q. Xu, H. Z. Shi, S. Q. Zhang, J. H. Liu, R. B. Li, Y. H. Zhou, Xiru Huang, X. F. Song, Y. F. Lai, H. L. Ni, J. W. Zhao, Michael Schernau, W. Yang, Wei Li, H. F. Chen, L. Z. Wang, G. L. Tong, G. F. Xu, S. Z. Ye, M. H. Kelsey, J. Nie, S. Jin, Xuan Yang, B. A. Zhuang, T. Hu, S. T. Xue, L. J. Pan, J. Oyang, Q. H. Hu, E. C. Ma, J. F. Qiu, G. Y. Hu, Y. Y. Shao, C. S. Gao, W. X. Gu, H. L. Zhang, W. G. Yan, Jinxing Zheng, W. H. Toki, D. M. Xi, T. H. Burnett, D. G. Hitlin, J. Yan, D. P. Stoker, H. Yang, Q. M. Zhu, P. Gratton, L. P. Zhou, Lei Zhang, F. Wang, C. Y. Yang, X. M. Xia, Z. P. Mao, F. Sun, T. J. Wang, M. Z. Wang, Z. W. Chai, Joseph Izen, G. Rong, H. S. Sun, X. N. Li, Y. S. Zhu, J. Synodinos, J. Yang, L. S. Wang, M. H. Ye, X. Y. Shen, R. S. Xu, Y. H. Qu, E. Prabhakar, J. G. Bian, A. J. Lankford, Y. K. Que, J. Chen, W. Dunwoodie, G. P. Chen, W. D. Li, D. Z. Xu, B. K. Kim, S. W. Han, H. S. Mao, A. M. Ma, H. S. Zhou, Q. Y. Li, J. He, Stephen L. Olsen, B. S. Cheng, D. H. Zhang, C. S. Yu, X. Y. Zhang, R. G. Liu, J. H. Gu, J. Schultz, B. Schmid, K. K. Young, J. P. Liu, S. Q. Gao, Z. J. Ke, W. G. Li, H. Shen, H. M. Liu, Cunfeng Wei, P. P. Xie, P. Q. Li, J. W. Zhang, D. X. Zhao, B. Y. Zhang, Y. Y. Wang, Q. Liu, R. Cowan, S. W. Ye, M. Weaver, Xingzhu Cui, Z. T. Yu, A. Breakstone, Y. N. Guo, Y. L. Han, S. Q. Luo, I. Blum, H. W. Zhao, Y. Z. Huang, F. C. Porter, D. Paluselli, D. Kong, Y. P. Tan, P. Wang, M. G. Zhao, S. M. Wang, X. R. Shi, J. C. Chen, F. Lu, Xuanhong Lou, R. Malchow, J. Fang, L. S. Zheng, G. P. Zhou, Z. Z. Du, S. H. Kang, S. J. Sun, J. Y. Zhang, M. Mandelkern, C. Z. Yuan, Y. Y. Zhang, H. L. Ding, W. J. Wisniewski, Z. A. Liu, J. Z. Bai, H. Y. Sheng, C. X. Yu, and N. D. Qi
Subjects: Hadronic decay, Combinatorics, Physics, Semileptonic decay, Nuclear and High Energy Physics, Meson, Branching fraction
Abstract: Author(s): Bai, JZ; Bardon, O; Bian, JG; Blum, I; Breakstone, A; Burnett, T; Chai, ZW; Chen, GP; Chen, HF; Chen, J; Chen, JC; Chen, SM; Chen, Y; Chen, YB; Chen, YQ; Cheng, BS; Cowan, RF; Cui, XZ; Ding, HL; Du, ZZ; Dunwoodie, W; Fan, XL; Fang, J; Fero, M; Gao, CS; Gao, ML; Gao, SQ; Gratton, P; Gu, JH; Gu, SD; Gu, WX; Gu, YF; Guo, YN; Han, SW; Han, Y; Harris, FA; He, J; He, JT; He, M; Hitlin, DG; Hu, GY; Hu, JL; Hu, QH; Hu, T; Hu, XQ; Huang, XP; Huang, YZ; Izen, JM; Jia, QP; Jiang, CH; Jin, S; Jin, Y; Jones, L; Kang, SH; Ke, ZJ; Kelsey, MH; Kim, BK; Kong, D; Lai, YF; Lan, HB; Lang, PF; Lankford, A; Li, J; Li, PQ; Li, Q; Li, RB; Li, W; Li, WD; Li, WG; Li, XH; Li, XN; Lin, SZ; Lu, F; Liu, HM; Liu, J; Liu, JH; Liu, Q; Liu, RG; Liu, Y; Liu, ZA; Lou, XC; Lowery, B; Lu, JG; Lu, JY; Luo, SQ | Abstract: The absolute inclusive semileptonic branching fraction of the [Formula presented] meson has been measured based on [Formula presented] of [Formula presented] collision data collected with the Beijing Spectrometer at [Formula presented] At this energy, the [Formula presented] are produced in pairs: [Formula presented] We reconstructed [Formula presented] [Formula presented] events in five hadronic decay modes. In the recoil system of these events, several [Formula presented] inclusive semileptonic decays were observed and the branching fraction is estimated to be [Formula presented] © 1997 The American Physical Society.
Published: 1997

30. Fine mapping and characterization of a novel dwarf and narrow-leaf mutant dnl1 in rice

Author: M L Chen, G N Shao, Xiangjin Wei, Y C Hu, S Q Tang, and P S Hu
Subjects: Genetic Markers, Genotype, Plant genetics, Mutant, Genes, Recessive, Biology, Genes, Plant, Real-Time Polymerase Chain Reaction, Genetic analysis, Chromosomes, Plant, Gene Expression Regulation, Plant, Genetics, Cloning, Molecular, Molecular Biology, Gene, Panicle, Plant Proteins, Regulation of gene expression, Oryza sativa, Sequence Analysis, RNA, food and beverages, Chromosome Mapping, Oryza, General Medicine, Gibberellins, Plant Leaves, Phenotype, RNA, Plant, Mutation, Seeds, Microscopy, Electron, Scanning, Gibberellin
Abstract: Plant height is one of the most important agronomic traits of rice (Oryza sativa). Dwarf mutants are ideal materials for research on the mechanisms of regulation of rice plant height. We examined a new dwarf and narrow-leaf mutant dnl1. Phenotypic analysis showed that the dnl1 mutant has a thinner culm and more tillers, but the number of grains per panicle, the seed setting rate and the grain weight of dnl1 mutant were found to be significantly lower than in the wild-type. Based on scanning electron microscopic observations, the number of cells in the y-axis in internodes was significantly lower than in the wild-type. In phytohormone induction experiments, dnl1 was gibberellic acid-insensitive. The expression of some genes involved in the gibberellins metabolic pathways was affected in the dnl1 mutant, based on the real-time PCR analysis, suggesting that the dnl1 gene likely plays a role in gibberellin metabolic pathways. Genetic analysis showed that the dwarf and narrow leaf phenotype is controlled by a novel single recessive gene, here referred to as the dwarf and narrow leaf 1 (dnl1), which is located within the region between markers Ind12-11 and RM8214 on the short arm of chromosome 12. By means of fine-mapping strategy, the dnl1 gene was localized within an interval of 285.75 kb physical distance. These results will be useful for dnl1 gene cloning and to improve our understanding of the molecular mechanisms involved in the regulation of growth and development of rice.
Published: 2013

31. Structure Analysis of thefJ(1710)in the Radiative DecayJ/ψ→γK+K−

Author: M. L. Gao, Y. L. Han, Y. B. Chen, Xuan Yang, L. C. Lu, Y. F. Lai, Kai Yi, F. Lu, H. F. Chen, L. S. Wang, H. B. Lan, M. H. Ye, W. G. Yan, Y. P. Tan, S. M. Wang, S. Q. Zhang, Jun-Bing Ma, Lei Zhang, S. Q. Luo, H. L. Ni, G. Rong, S. Z. Lin, W. R. Zhao, Y. Zhang, S. D. Gu, S. W. Han, B. W. Shen, Z. Z. Du, Jiming Yang, S. J. Sun, A. M. Ma, X. Q. Hu, H. S. Zhou, G. P. Zhou, S. H. Kang, Q. H. Hu, E. C. Ma, C. Z. Yuan, C. C. Zhang, Z. D. Cheng, X. Y. Zhang, R. G. Liu, H. L. Zhang, Y. F. Gu, J. F. Qiu, Q. J. Li, Wei Li, Y. Z. Huang, S. Q. Tang, J. G. Bian, Qiyang Zhang, D. L. Shen, X. C. Meng, W. J. Xiong, Y. Jin, H. W. Zhao, S. Q. Gao, Z. J. Ke, De. H. Zhang, W. X. Gu, P. Wang, L. Zhang, Z. A. Liu, J. C. Li, F. Sun, H. S. Mao, W. H. Zhao, W. Y. Ding, C. Y. Yang, Z. P. Zheng, P. F. Lang, S. M. Chen, Y. C. Zhu, H. L. Ding, B. S. Cheng, P. L. Wang, Men Wang, G. F. Xu, S. Jin, Y. N. Guo, T. J. Wang, J. H. Gu, Xiru Huang, J. Z. Bai, D. H. Zhang, G. L. Tong, C. S. Yu, Y. Luo, H. Shen, R. B. Li, Z. Q. Xu, Y. H. Qu, J. T. He, B. A. Zhuang, Y. S. Zhu, Q. Liu, R. S. Xu, J. G. Lu, Y. G. Xie, H. Y. Sheng, J. He, Y. H. Zhou, Y. K. Que, Cunfeng Wei, T. Hu, C. X. Yu, X. Y. Shen, N. D. Qi, J. W. Zhang, C. M. Yang, Chun-Hua Jiang, X. M. Xia, Z. W. Chai, Z. Q. Yu, M. G. Zhao, J. H. Liu, Xingzhu Cui, Z. T. Yu, J. Nie, Y. Y. Shao, C. S. Gao, Jinxing Zheng, J. C. Chen, Q. M. Zhu, Miao He, J. Fang, L. S. Zheng, M. Z. Wang, S. W. Ye, H. S. Sun, X. N. Li, L. P. Zhou, F. Wang, D. M. Xi, J. Yan, Z. P. Mao, J. Y. Zhang, D. X. Zhao, B. Y. Zhang, Y. Y. Zhang, Y. Y. Wang, S. Z. Ye, S. T. Xue, G. Y. Hu, H. Z. Shi, X. F. Song, L. Z. Wang, W. G. Li, H. M. Liu, J. P. Liu, P. P. Xie, P. Q. Li, X. L. Fan, J. W. Zhao, G. P. Chen, W. D. Li, Jun Wang, Y. Q. Chen, X. H. Li, J. Y. Lu, Y. B. Liu, J. L. Hu, and Y. G. Wu
Subjects: Nuclear physics, Physics, Structure analysis, Electron–positron annihilation, Radiative decay, General Physics and Astronomy
Published: 1996

32. Studies ofξ(2230) inJ/ψRadiative Decays

Author: J. Z. Bai, G. P. Chen, H. F. Chen, S. J. Chen, S. M. Chen, Y. Chen, Y. B. Chen, Y. Q. Chen, B. S. Cheng, X. Z. Cui, H. L. Ding, W. Y. Ding, Z. Z. Du, X. L. Fan, J. Fang, C. S. Gao, M. L. Gao, S. Q. Gao, J. H. Gu, S. D. Gu, W. X. Gu, Y. F. Gu, Y. N. Guo, S. W. Han, Y. Han, J. He, M. He, G. Y. Hu, T. Hu, X. Q. Hu, D. Q. Huang, T. Huang, Y. Z. Huang, C. H. Jiang, S. Jin, Y. Jin, S. H. Kang, Z. J. Ke, Y. F. Lai, H. B. Lan, P. F. Lang, F. Li, J. Li, P. Q. Li, Q. Li, R. B. Li, W. Li, W. D. Li, W. G. Li, X. H. Li, X. N. Li, S. Z. Lin, H. M. Liu, J. Liu, J. H. Liu, Q. Liu, R. G. Liu, Y. Liu, Z. A. Liu, J. G. Lu, J. Y. Lu, S. Q. Luo, Y. Luo, A. M. Ma, E. C. Ma, J. M. Ma, H. S. Mao, Z. P. Mao, X. C. Meng, H. L. Ni, J. Nie, N. D. Qi, Y. K. Que, G. Rong, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, X. Y. Shen, H. Y. Sheng, H. Z. Shi, X. F. Song, F. Sun, H. S. Sun, S. J. Sun, Y. P. Tan, S. Q. Tang, G. L. Tong, F. Wang, L. S. Wang, L. Z. Wang, M. Wang, P. Wang, P. L. Wang, S. M. Wang, T. J. Wang, Y. Y. Wang, C. L. Wei, D. M. Xi, X. M. Xia, P. P. Xie, Y. G. Xie, W. J. Xiong, D. Z. Xu, R. S. Xu, Z. Q. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, J. Yang, W. Yang, M. H. Ye, S. W. Ye, S. Z. Ye, C. S. Yu, C. X. Yu, Z. Q. Yu, Z. T. Yu, C. Z. Yuan, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. Zhang, L. S. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Zhang, Y. Y. Zhang, D. X. Zhao, H. W. Zhao, J. W. Zhao, M. Zhao, P. D. Zhao, W. R. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, G. P. Zhou, H. S. Zhou, Li Zhou, X. F. Zhou, Y. H. Zhou, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, and B. A. Zhuang
Subjects: Physics, Particle physics, Glueball, Radiative transfer, General Physics and Astronomy
Abstract: The BES experiment at the Beijing electron-positron collider has observed the $\ensuremath{\xi}$(2230) signal in ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${K}^{+}{K}^{\ensuremath{-}}$, ${K}_{S}^{0}{K}_{S}^{0}$, and $p\overline{p}$ final states with $4.6\ensuremath{\sigma}$, $4.1\ensuremath{\sigma}$, $4.0\ensuremath{\sigma}$, and $3.8\ensuremath{\sigma}$ statistical significances, respectively. The new observations of two nonstrange decay modes of $\ensuremath{\xi}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and $p\overline{p}$ are important evidence for the glueball interpretation of the $\ensuremath{\xi}(2230)$.
Published: 1996

33. Direct measurement of theDsbranching fraction to φπ

Author: Z. P. Zheng, C. C. Zhang, D. Paluselli, G. L. Tong, B. A. Zhuang, Xingzhu Cui, E. Torrence, H. Shen, J. C. Chen, Xuanhong Lou, R. Malchow, H. S. Mao, S. D. Gu, Q. Liu, J. Panetta, Y. P. Tan, S. M. Wang, S. M. Chen, B. S. Cheng, X. C. Meng, J. Standifird, A. J. S. Smith, A. Breakstone, Y. S. Zhu, Y. C. Zhu, J. Fang, L. S. Zheng, Jun-Bing Ma, J. Synodinos, R. B. Li, D. Q. Huang, J. W. Zhang, H. L. Ding, Z. Q. Xu, J. H. Gu, J. Quigley, P. Gratton, P. L. Wang, X. F. Zhou, J. Schultz, S. J. Chen, X. M. Xia, D. X. Zhao, B. Y. Zhang, G. Zioulas, Pihong Zhao, W. X. Zhao, Y. Y. Wang, X. L. Fan, D. P. Stoker, W. X. Gu, S. Q. Tang, W. Dunwoodie, W. H. Toki, W. G. Li, M. L. Gao, M. G. Zhao, W. J. Wisniewski, S. H. Kang, I. Blum, O. Bardon, E. Soderstrom, J. C. Li, M. Mandelkern, C. Z. Yuan, Q. J. Li, Wei Li, D. Z. Xu, Y. Jin, H. Y. Sheng, S. Whittaker, C. M. Yang, W. X. Gao, R. Cowan, J. G. Lu, L. J. Pan, F. A. Harris, L. Jones, H. C. Cui, Y. H. Zhou, Y. B. Chen, H. B. Lan, C. X. Yu, Jiang Changhui, H. M. Liu, R. G. Liu, G. P. Zhou, Y. F. Lai, R. S. Xu, H. Z. Shi, S. Q. Gao, N. D. Qi, R. K. Yamamoto, R. J. Wilson, H. F. Chen, W. F. Wang, B. Schmid, T. Hu, J. Y. Zhang, X. F. Song, Y. K. Que, Q. M. Zhu, P. Wang, P. F. Lang, F. Li, Li Zhou, Z. Z. Du, B. K. Kim, L. S. Wang, M. H. Ye, J. W. Zhao, Y. Y. Zhang, M. H. Kelsey, S. J. Sun, D. G. Hitlin, X. Q. Li, Y. Z. Huang, L. Z. Wang, M. Z. Wang, K. R. He, H. S. Sun, J. Oyang, X. Q. Hu, X. N. Li, H. L. Ni, C. Y. Yang, D. M. Xi, S. Z. Ye, J. Yan, M. Hatanaka, Y. F. Gu, J. H. Liu, W. G. Yan, X. R. Shi, Michael Schernau, W. Yang, M. He, D. L. Shen, J. Nie, Z. A. Liu, F. C. Porter, H. B. Yao, S. T. Xue, Y. Y. Shao, F. Sun, C. S. Gao, G. Y. Hu, Jinxing Zheng, Lei Zhang, J. Z. Bai, D. H. Zhang, G. P. Chen, Joseph Izen, T. J. Wang, W. D. Li, S. L. Olsen, C. S. Yu, G. Rong, P. P. Xie, E. Prabhakar, B. Lowery, A. J. Lankford, S. W. Han, P. Q. Li, A. M. Ma, H. S. Zhou, X. Y. Shen, Y. N. Guo, Y. L. Han, E. C. Ma, H. L. Zhang, Y. Q. Chen, Z. Q. Yu, S. Z. Lin, W. R. Zhao, Q. P. Jia, Y. Zhang, H. B. Hu, Y. B. Liu, S. Q. Zhang, Michael J. Fero, J. He, T. H. Burnett, F. Wang, and Z. P. Mao
Subjects: Nuclear physics, Physics, Particle physics, Pion, Pair production, Meson, law, Branching fraction, Electron–positron annihilation, Yield (chemistry), Pi, Collider, law.invention
Abstract: The Beijing Spectrometer (BES) Collaboration has observed exclusive pair production of D_s mesons at the Beijing Electron-Positron Collider (BEPC) at a center-of-mass energy of 4.03 GeV. The D_s mesons are detected in the φπ^+, K¯^(*0)K^+, and K¯^0K^+ decay modes; two fully reconstructed events yield the value (3.9_(-1.9-1.1)^(+5.1+1.8))% for the D_s branching fraction to φπ. This is the first direct, model-independent measurement of this quantity.
Published: 1995

34. A measurement of decay widths

Author: H. S. Mao, Z. D. Cheng, W. H. Zhao, S. Q. Tang, B. S. Cheng, Y. P. Tan, S. M. Wang, S. D. Gu, Y. B. Liu, J. H. Gu, P. Wang, J. H. Liu, W. Yang, X. C. Meng, Pihong Zhao, W. X. Gu, H. Y. Sheng, H. L. Ding, T. J. Wang, Y. Z. Huang, J. Nie, C. X. Yu, S. H. Kang, H. Shen, C. Z. Yuan, Ya-Nan Guo, S. M. Chen, Y. C. Zhu, Y. Y. Shao, Wei Li, P. L. Wang, X. F. Zhou, Z. Q. Yu, S. T. Xue, C. S. Gao, H. P. Hu, N. D. Qi, Jinxing Zheng, L. J. Pan, R. S. Xu, Y. S. Zhu, G. Y. Hu, Z. A. Liu, Y. G. Xie, Y. K. Que, J. Y. Zhang, Q. Liu, Y. Q. Chen, X. Y. Shen, G. P. Zhou, X. X. Xie, Y. B. Chen, Q. M. Zhu, F. Li, H. L. Ni, M. Z. Wang, R. B. Li, L. S. Wang, Cunfeng Wei, Y. Y. Zhang, M. H. Ye, H. S. Sun, X. N. Li, K. R. He, S. W. Han, J. Z. Bai, P. F. Lang, Y. N. Guo, W. Z. Fang, D. X. Zhao, B. Y. Zhang, H. B. Lan, W. G. Li, J. W. Zhang, Y. L. Han, Y. Y. Wang, Jiang Changhui, S. Z. Ye, Z. Z. Du, H. M. Liu, D. Z. Xu, A. M. Ma, H. S. Zhou, Q. Y. Li, J. He, J. Fang, L. S. Zheng, X. Y. Zhang, R. G. Liu, L. P. Zhou, Z. P. Mao, P. P. Xie, D. H. Ma, P. Q. Li, M. G. Zhao, Y. Jin, S. Q. Luo, S. Q. Zhang, G. P. Chen, Xingzhu Cui, F. Sun, C. M. Yang, W. X. Gao, W. D. Li, S. Q. Gao, Z. J. Ke, X. L. Fan, Z. P. Zheng, J. W. Zhao, W. G. Yan, Lei Zhang, G. Rong, Bing Zhou, S. Z. Lin, W. R. Zhao, X. Q. Hu, D. M. Xi, J. Yan, Y. F. Gu, G. L. Tong, M. He, B. A. Zhuang, Y. Zhang, D. L. Shen, M. L. Gao, J. C. Li, S. J. Chen, Y. F. Lai, H. F. Chen, J. G. Lu, Y. H. Zhou, T. Hu, X. M. Xia, D. Q. Huang, C. C. Zhang, S. Jin, Z. Q. Xu, Jun-Bing Ma, H. C. Cui, H. Z. Shi, D. H. Zhang, C. S. Yu, X. F. Song, E. C. Ma, H. L. Zhang, L. Z. Wang, Q. M. Li, B. W. Shen, W. Y. Ding, and C. Y. Yang
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Muon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Hadron, Detector, High Energy Physics::Experiment, Electron, Atomic physics, Resonance (particle physics)
Abstract: The cross sections for e+e− → hadrons, e+e−, μ+μ− have been measured in the vicinity of the J Ψ resonance using the BES detector operated at BEPC. The partial widths for J Ψ to hadrons, electrons, muons and the total width have been determined to be Γh = 74.1 ± 8.1 keV, Γe = 5.14 ± 0.39 keV, Γμ = 5.13 ± 0.52 keV, and Γ = 84.4 ± 8.9 keV, respectively.
Published: 1995

35. The BES detector

Author: R. G. Liu, Z. Z. Du, Wei Li, Z.Q. Chen, Xi Wang, S. M. Wang, Junguang Lu, S. W. Han, R. S. Xu, H. S. Zhou, Y. K. Que, Li Zhou, B.Z. Dong, J. Shen, G. Rong, H. L. Ding, C. H. Jiang, R. B. Li, Yao Zhang, C. Q. Feng, Jia Li, X. M. Xia, X. Liu, Jin Li, C.S. Yu, Z.Q. Zhao, Z.D. Nie, Min Zhou, Lei Li, Hongming Zhang, G.Y. Wang, H. C. Cui, C. L. Wei, H. Z. Shi, D. X. Zhao, B. Y. Zhang, Y. Y. Wang, Y.H. Qu, Z.Y. Liu, J.G. Wang, Z. P. Zheng, B. A. Zhuang, W.H. Tian, G.S. Zhu, D. H. Ma, Jing Zhou, Lin Zhou, X.J. Hou, Zhen-An Liu, L. J. Pan, Q. P. Jia, Ming-Han Ye, Xuan Yang, S. D. Gu, G. P. Zhou, X. C. Meng, H. S. Mao, H. L. Ni, J. Xiao, Y. Q. Chen, X. F. Song, G.P. Zhong, Guo-Ming Chen, S. Z. Lin, W. R. Zhao, Y. N. Gao, Y.Z. Guan, T. J. Wang, Ya-Nan Guo, W.D. Lu, L. S. Zheng, S. Q. Tang, C.Y. Zhang, Q. M. Li, M. L. Gao, P. L. Wang, J.S. Hu, Hui Li, C.G. Lu, B. W. Shen, Yue-Hua Zhou, X.R. Yang, J. Z. Bai, D. M. Xi, Pihong Zhao, M. Zheng, P. P. Zhao, Y. S. Zhu, W. X. Gu, J. Yan, W. Liu, Y. H. Zhou, Z.Y. Lu, Y. F. Lai, Shao-Min Chen, F.C. Lin, W.P. Niu, E. C. Ma, Dehong Zhang, X. Z. Cui, W. G. Yan, C. M. Yang, S.P. Yan, W. X. Gao, S.Q. Li, Y. Z. Huang, H. L. Zhang, S.G. Zhu, Z.Z. Wei, Chunmei Zhang, Q. Ju, M. Wang, H. Y. Sheng, L. S. Wang, Y. Y. Zhang, Z. Q. Yu, Shun-Qi Zhang, M. He, D. L. Shen, J.W. Wu, X. Du, W.S. Zheng, N. D. Qi, Chen-Hua Yu, Lei Zhang, K. R. He, J. Zhao, Willis Lin, D. Q. Huang, T.Z. Ruan, M. G. Zhao, J.J. Qian, Ping Wang, C.Z. Yang, S. T. Xue, P. F. Lang, G. Y. Hu, S. Q. Gao, J. W. Zhang, J.P. Sheng, Y.W. Deng, Zirui Wang, Siguang Wang, F.K. Tang, Qian Liu, Zhe Wang, S.Q. Wu, B.C. Xuan, J. M. Ma, Q. Bian, Y. L. Han, L.J. Chen, Yue-Yuan Zhang, X.S. Dong, Xiao-Xi Xie, Jianping Zheng, Lu Wang, W. Hao, C. Y. Yang, Z.D. Wu, F. Y. Li, Geoffrey Zhang, S.H. Wu, Z. Feng, Y. N. Guo, J.Y. Wang, P. P. Xie, G.N. Liang, J.W. Hu, P. Q. Li, J. He, W. G. Li, J.G. Xu, W.M. Wu, F. Wang, Y. C. Zhu, Z. P. Mao, J. Nie, Z.X. Li, Chang-Chun Zhang, Y. Y. Shao, C. S. Gao, Z.S. Fu, Y.K. Chi, H.F. Guo, Q. M. Zhu, S.S. Deng, H. S. Sun, Z. Q. Xu, Z. G. Zhao, Xin Wu, and D. Li
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Spectrometer, Physics::Instrumentation and Detectors, Electron–positron annihilation, Detector, Particle identification, Charged particle, law.invention, Nuclear physics, Positron, law, Physics::Accelerator Physics, High Energy Physics::Experiment, Center of mass, Collider, Instrumentation
Abstract: The Beijing Spectrometer (BES) is a general purpose solenoidal detector at the Beijing Electron Positron Collider (BEPC). It is designed to study exclusive final states in e + e − annihilations at the center of mass energy from 3.0 to 5.6 GeV. This requires large solid angle coverage combined with good charged particle momentum resolution, good particle identification and high photon detection efficiency at low energies. In this paper we describe the construction and the performance of BES detector.
Published: 1994

36. A Relay-Zone Technique for Computing Dynamic Dislocations

Author: Eduard G. Karpov, W. K. Liu, S. Q. Tang, and T. Y. Hou
Subjects: Physics, Quantitative Biology::Biomolecules, Computation, Mechanics, Mathematics::Numerical Analysis, law.invention, Condensed Matter::Materials Science, Time history, Grid computation, Relay, law, Lattice (order), Jump, Dislocation
Abstract: We propose a multiscale method for simulating solids with moving dislocations. Away from atomistic subdomains where the atomistic dynamics are fully resolved, a dislocation is represented by a localized jump profile, superposed on a defect-free field. We assign a thin relay zone around an atomistic subdomain to detect the dislocation profile and its propagation speed at a selected relay time. The detection technique utilizes a lattice time history integral treatment. After the relay, an atomistic computation is performed only for the defect-free field. The method allows one to effectively absorb the fine scale fluctuations and the dynamic dislocations at the interface between the atomistic and continuum domains. In the surrounding region, a coarse grid computation is adequate.
Published: 2007

37. Measurement of inclusive momentum spectra and multiplicity distributions of charged particles ats∼2–5GeV

Author: Y. X. Yang, S. Q. Zhang, Z. G. Zhao, Y. Z. Sun, L. Huang, F. Li, Z. J. Sun, F. C. Ma, H. Y. Sheng, R. B. Li, M. L. Gao, Z. P. Zheng, X. Tang, N. D. Qi, W. Dunwoodie, Y. Zeng, X. Y. Zhang, W. D. Li, R. G. Liu, L. P. Fu, J. B. Liu, C. L. Luo, L. L. Ma, Houbing Lu, S. T. Xue, Xiru Huang, Z. A. Liu, W. R. Zhao, X. Q. Li, G. L. Tong, J. F. Qiu, C. C. Zhang, Y. Ban, F. Liu, B. A. Zhuang, S. D. Gu, Fang Liu, Y. Jin, Q. Yue, Y. N. Gao, Yingchun Zhu, J. C. Li, Q. J. Li, J. Z. Bai, X. S. Jiang, J. W. Zhao, B.S. Zou, Y. Q. Guo, D. Kong, Jiming Yang, G. W. Yu, L. S. Wang, Z. Z. Du, M. Y. Gong, Huirun Chen, Y. B. Chen, Y. C. Zhu, Y. P. Chu, Zheng Wang, Z. X. Liu, X. B. Ji, S. L. Olsen, X. H. Mo, P. L. Wang, S. S. Fang, Y. F. Lai, M. H. Ye, D. X. Zhao, B. Y. Zhang, H. F. Chen, Meng Wang, J. C. Chen, W. F. Wang, Z. Y. Wang, Hangxu Li, Xuanhong Lou, R. Malchow, Jiemin Li, Fan Yang, Y. B. Liu, Yudan Wang, S. Q. Tang, J. Fang, Bing Zhou, G. S. Varner, Qingying Jia, L. S. Zheng, H. Y. Zhang, X. C. Meng, L. W. Song, Y. N. Guo, S. P. Chi, X. L. Luo, G. S. Huang, G. R. Lu, J. Ying, F. A. Harris, L. Y. Dong, J. Y. Zhang, K. L. He, Jun-Bing Ma, X. M. Xia, Chun-Hua Jiang, Z. P. Zhang, S. W. Han, K. J. Zhu, Y. J. Zhang, J. M. Yuan, Y. K. Heng, Y. Y. Zhang, J. F. Chang, Hongbo Liao, B. X. Zhang, W. H. Toki, J. M. Zhang, X. Y. Ma, Zujian Wang, Z. A. Zhu, W. X. Gong, H. Y. Fu, G. Li, J. J. He, W. B. Yan, Yang Tian, C. D. Fu, Yiyun Zhang, Y. Yuan, Y. S. Zhu, Y. X. Ye, H. M. Hu, S. X. Du, M. L. Yan, Feng Shi, Xintong Li, Y. B. Zhao, D. L. Shen, X. X. Xie, Xingzhu Cui, Jie Chen, E. C. Ma, S. S. Sun, H. S. Chen, Guangzhao Zhou, C. X. Liu, J. B. Zhao, F. Lu, X. Y. Shen, G. F. Xu, X. H. He, S. Jin, C. Z. Yuan, Zhe Wang, Qiyang Zhang, Z. J. Guo, Jiawei Zhao, Z. J. Ke, H. Shen, R. Y. Li, P. Wang, Cunfeng Wei, Y. M. Dai, D. Tian, Ning Zhou, J. W. Zhang, J. G. Lu, T. Hu, XZ（蔡翔舟） Cai, B. D. Jones, X. C. Zhong, Z. D. Nie, J. Z. Wang, Y. F. Liang, D. P. Jin, J. G. Bian, D. H. Zhang, C. S. Yu, K. J. Li, W. G. Li, S. D. Yang, C. D. Qian, H. M. Liu, P. P. Zhao, H. L. Dai, Lei Zhang, Joseph Izen, G. Rong, H. X. Yang, Q. M. Zhu, Y. C. Xu, J. P. Liu, M. Z. Wang, G. A. Yang, H. S. Sun, Haiping Peng, J. Nie, Y. S. Dai, C. S. Gao, Jinxing Zheng, Miao He, L. P. Zhou, Z. P. Mao, S. L. Zang, and N. Wu
Subjects: Nuclear physics, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, High energy, Electron–positron annihilation, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Multiplicity (chemistry), Spectral line, Charged particle
Abstract: Inclusive momentum spectra and multiplicity distributions of charged particles measured with the BESII detector at center of mass energies of 2.2, 2.6, 3.0, 3.2, 4.6 and 4.8 GeV are presented. Values of the second binomial moment ${R}_{2}$ obtained from the multiplicity distributions are reported. These results are compared with both experimental data from high energy ${e}^{+}{e}^{\ensuremath{-}},$ ep, and $p\overline{p}$ experiments and QCD calculations.
Published: 2004

38. Partial wave analyses ofJ/ψ→γK+K−andγKS0KS0

Author: S. D. Gu, Q. Yue, J. Z. Wang, Feng Shi, Yang Tian, Y. F. Liang, D. P. Jin, G. S. Varner, Qingying Jia, Guangzhao Zhou, W. G. Li, L. P. Fu, W. B. Yan, S. X. Du, L. W. Song, C. L. Luo, Houbing Lu, D. H. Zhang, C. S. Yu, Y. J. Zhang, J. B. Zhao, M. L. Yan, C. C. Zhang, Jiming Yang, S. T. Xue, Huirun Chen, Yingchun Zhu, J. G. Lu, H. M. Liu, X. Y. Shen, P. P. Zhao, S. L. Olsen, E. C. Ma, X. Tang, Z. Y. Wang, Yudan Wang, S. Q. Tang, Xingzhu Cui, Qiyang Zhang, X. H. Mo, L. S. Wang, X. H. He, Y. P. Chu, X. B. Ji, G. R. Lu, M. H. Ye, Lei Zhang, X. C. Meng, W. D. Li, P. Wang, Y. M. Dai, S. L. Zang, T. Hu, XZ（蔡翔舟） Cai, Z. G. Zhao, Jie Chen, S. S. Sun, Z. P. Zheng, H. X. Yang, Z. A. Zhu, G. Rong, Z. J. Guo, Xiru Huang, S. S. Fang, Y. B. Liu, G. L. Tong, X. C. Zhong, J. P. Liu, B. A. Zhuang, L. Huang, H. Y. Sheng, Z. J. Sun, X. L. Luo, J. Nie, Fang Liu, H. M. Hu, N. D. Qi, J. W. Zhao, G. Li, G. W. Yu, F. Lu, C. D. Fu, L. L. Ma, Q. J. Li, W. R. Zhao, G. A. Yang, D. X. Zhao, B. Y. Zhang, Jiawei Zhao, F. Liu, Y. Yuan, Y. S. Zhu, J. J. He, Z. A. Liu, Y. Ban, F. Li, F. C. Ma, Hangxu Li, Jiemin Li, R. B. Li, J. C. Li, M. Y. Gong, Y. S. Dai, C. S. Gao, Jinxing Zheng, X. Q. Li, Z. J. Ke, Miao He, S. D. Yang, J. Z. Bai, D. Tian, Xintong Li, Y. N. Gao, X. X. Xie, S. P. Chi, B. X. Zhang, Z. D. Nie, J. G. Bian, Z. Z. Du, J. F. Qiu, H. Shen, L. P. Zhou, R. Y. Li, K. J. Zhu, J. M. Yuan, Z. X. Liu, H. L. Dai, C. Z. Yuan, Z. P. Mao, K. J. Li, X. Y. Zhang, K. L. He, Zhe Wang, Q. M. Zhu, R. G. Liu, S. W. Han, Y. C. Xu, L. Y. Dong, J. M. Zhang, M. Z. Wang, J. B. Liu, Cunfeng Wei, H. S. Sun, Fan Yang, Y. C. Zhu, Haiping Peng, P. L. Wang, Meng Wang, Bing Zhou, Ning Zhou, Y. X. Yang, J. W. Zhang, C. D. Qian, F. A. Harris, H. S. Chen, S. Q. Zhang, Z. P. Zhang, Chun-Hua Jiang, Y. Z. Sun, Y. Jin, Zujian Wang, D.V. Bugg, Y. B. Zhao, Jun-Bing Ma, X. Y. Ma, W. X. Gong, B.S. Zou, N. Wu, X. S. Jiang, M. L. Gao, Y. Zeng, Y. Q. Guo, Y. B. Chen, Y. F. Lai, H. F. Chen, W. F. Wang, J. F. Chang, Hongbo Liao, H. Y. Zhang, Yiyun Zhang, G. S. Huang, J. Ying, Y. X. Ye, J. Y. Zhang, Y. K. Heng, Y. Y. Zhang, Zheng Wang, G. F. Xu, S. Jin, X. M. Xia, J. C. Chen, H. Y. Fu, D. L. Shen, C. X. Liu, J. Fang, L. S. Zheng, and Y. N. Guo
Subjects: Physics, Nuclear and High Energy Physics, Partial wave analysis, Production (computer science), Atomic physics, Helicity, Spin-½
Abstract: Results are presented on $J/\ensuremath{\psi}$ radiative decays to ${K}^{+}{K}^{\ensuremath{-}}$ and ${K}_{S}^{0}{K}_{S}^{0}$ based on a sample of 58M $J/\ensuremath{\psi}$ events taken with the BES II detector. A partial wave analysis is carried out using the relativistic covariant tensor amplitude method in the 1--2 GeV mass range. There is conspicuous production due to the ${f}_{2}^{\ensuremath{'}}(1525)$ and ${f}_{0}(1710).$ The latter peaks at a mass of $1740\ifmmode\pm\else\textpm\fi{}{4}_{\ensuremath{-}25}^{+10}\mathrm{MeV}$ with a width of ${166}_{\ensuremath{-}8\ensuremath{-}10}^{+5+15}\mathrm{MeV}.$ Spin 0 is strongly preferred over spin 2. For the ${f}_{2}^{\ensuremath{'}}(1525),$ the helicity amplitude ratios are determined to be ${x}^{2}=1.00\ifmmode\pm\else\textpm\fi{}{0.28}_{\ensuremath{-}0.36}^{+1.06}$ and ${y}^{2}=0.44\ifmmode\pm\else\textpm\fi{}{0.08}_{\ensuremath{-}0.56}^{+0.10}.$
Published: 2003

39. Observation of a Near-Threshold Enhancement in thepp¯Mass Spectrum from RadiativeJ/ψ→γpp¯Decays

Author: K. Li, X. L. Luo, L. W. Song, J. Z. Wang, M. H. Ye, Y. C. Zhu, Stephen L. Olsen, R. B. Li, D. P. Jin, N. Wu, P. L. Wang, Meng Wang, J. J. He, L. Y. Dong, D. H. Zhang, Y. Jin, Y. J. Zhang, S. D. Yang, C. S. Yu, Fang Liu, C. F. Liu, Yingchun Zhu, Y. N. Guo, H. Shen, R. Y. Li, J. W. Zhao, Feng Shi, S. T. Xue, G. W. Yu, S. L. Zang, D. X. Zhao, Jing Wang, Y. B. Zhao, S. P. Chi, F. Lu, B. Y. Zhang, Jiemin Li, L. S. Wang, Xintong Li, F. Li, X. X. Xie, F. C. Ma, J. F. Chang, C. D. Qian, S. D. Gu, Guangzhao Zhou, Cunfeng Wei, Ning Zhou, H. Y. Zhang, Liang Huang, Yiyun Zhang, Q. Yue, B. X. Zhang, Q. J. Li, Xingzhu Cui, K. J. Zhu, J. M. Yuan, Yang Tian, Z. P. Zheng, H. S. Chen, G. S. Huang, M. L. Gao, Bing Zhou, Y. X. Ye, Y. Zeng, X. Y. Shen, Z. Zhao, J. F. Qiu, J. W. Zhang, Jie Chen, S. S. Fang, Z. J. Lu, Y. Q. Guo, J. Ying, J. Y. Zhang, Y. B. Chen, Y. B. Liu, J. Nie, Y. F. Lai, H. F. Chen, Yudan Wang, L. P. Zhou, S. Q. Tang, J. G. Bian, Xiru Huang, G. L. Tong, S. X. Du, W. F. Wang, X. C. Meng, G. R. Lu, Z. J. Guo, B. A. Zhuang, H. H. Li, Z. P. Mao, X. Q. Li, Y. K. Heng, Y. Y. Zhang, M. L. Yan, Z. A. Zhu, X. Y. Zhang, G. S. Varner, R. G. Liu, Y. S. Dai, T. Hong, G. Li, C. Z. Yuan, S. Q. Zhang, Zheng Wang, J. B. Liu, F. A. Harris, C. S. Gao, Jinxing Zheng, P. P. Zhao, Jiming Yang, Zhe Wang, C. D. Fu, Y. Z. Sun, X. S. Jiang, W. D. Li, X. Tang, Z. P. Zhang, K. L. He, Chun-Hua Jiang, W. B. Yan, S. W. Han, Qiyang Zhang, Z. Y. Wang, J. M. Zhang, J. C. Chen, Xuanhong Lou, W. H. Toki, Lei Zhang, R. Malchow, Joseph Izen, G. Rong, P. Wang, Zujian Wang, Q. M. Zhu, Y. Yuan, Y. S. Zhu, Y. M. Dai, Jun-Bing Ma, J. Fang, L. S. Zheng, Y. C. Xu, M. Z. Wang, D. Paluselli, W. X. Gong, D. Kong, W. R. Zhao, H. S. Sun, Y. P. Chu, X. B. Ji, F. Liu, M. Y. Gong, Haiping Peng, B.S. Zou, Jiawei Zhao, Y. N. Gao, J. Chen, H. M. Hu, Z. J. Ke, Z. J. Sun, L. P. Fu, Houbing Lu, C. C. Zhang, J. C. Li, H. X. Yang, W. G. Li, H. M. Liu, X. H. Mo, J. G. Lu, T. Hu, XZ（蔡翔舟） Cai, J. P. Liu, G. A. Yang, Z. Z. Du, B. D. Jones, S.S. Sun, X. C. Zhong, Z. X. Liu, W. Dunwoodie, D. Tian, G. F. Xu, S. Jin, H. Y. Sheng, N. D. Qi, Z. A. Liu, Y. Ban, J. Z. Bai, M. He, D. L. Shen, C. X. Liu, X. M. Xia, H. Y. Fu, Z. D. Nie, E. C. Ma, and X. H. He
Subjects: Physics, Nuclear physics, Antiparticle, Particle decay, Mass spectrum, Radiative transfer, General Physics and Astronomy, High Energy Physics::Experiment, Invariant mass, Elementary particle, Atomic physics, Nucleon, Resonance (particle physics)
Abstract: We observe a narrow enhancement near 2m(p) in the invariant mass spectrum of pp pairs from radiative J/psi-->gammapp decays. No similar structure is seen in J/psi-->pi(0)pp decays. The results are based on an analysis of a 58 x 10(6) event sample of J/psi decays accumulated with the BESII detector at the Beijing electron-positron collider. The enhancement can be fit with either an S- or P-wave Breit-Wigner resonance function. In the case of the S-wave fit, the peak mass is below 2m(p) at M=1859(+3)(-10) (stat)+5-25(syst) MeV/c(2) and the total width is Gamma
Published: 2003

40. Observation of a near-threshold enhancement in the pp mass spectrum from radiative J/psi--gammapp decays

Author: J Z, Bai, Y, Ban, J G, Bian, X, Cai, J F, Chang, H F, Chen, H S, Chen, J, Chen, Jie, Chen, J C, Chen, Y B, Chen, S P, Chi, Y P, Chu, X Z, Cui, Y M, Dai, Y S, Dai, L Y, Dong, S X, Du, Z Z, Du, W, Dunwoodie, J, Fang, S S, Fang, C D, Fu, H Y, Fu, L P, Fu, C S, Gao, M L, Gao, Y N, Gao, M Y, Gong, W X, Gong, S D, Gu, Y N, Guo, Y Q, Guo, Z J, Guo, S W, Han, F A, Harris, J, He, K L, He, M, He, X, He, Y K, Heng, T, Hong, H M, Hu, T, Hu, G S, Huang, L, Huang, X P, Huang, J M, Izen, X B, Ji, C H, Jiang, X S, Jiang, D P, Jin, S, Jin, Y, Jin, B D, Jones, Z J, Ke, D, Kong, Y F, Lai, F, Li, G, Li, H H, Li, J, Li, J C, Li, K, Li, Q J, Li, R B, Li, R Y, Li, W, Li, W G, Li, X Q, Li, X S, Li, C F, Liu, C X, Liu, Fang, Liu, F, Liu, H M, Liu, J B, Liu, J P, Liu, R G, Liu, Y, Liu, Z A, Liu, Z X, Liu, X C, Lou, G R, Lu, F, Lu, H J, Lu, J G, Lu, Z J, Lu, X L, Luo, E C, Ma, F C, Ma, J M, Ma, R, Malchow, Z P, Mao, X C, Meng, X H, Mo, J, Nie, Z D, Nie, S L, Olsen, D, Paluselli, H P, Peng, N D, Qi, C D, Qian, J F, Qiu, G, Rong, D L, Shen, H, Shen, X Y, Shen, H Y, Sheng, F, Shi, L W, Song, H S, Sun, S S, Sun, Y Z, Sun, Z J, Sun, S Q, Tang, X, Tang, D, Tian, Y R, Tian, W, Toki, G L, Tong, G S, Varner, J, Wang, J Z, Wang, L, Wang, L S, Wang, M, Wang, Meng, Wang, P, Wang, P L, Wang, W F, Wang, Y F, Wang, Zhe, Wang, Z, Wang, Zheng, Wang, Z Y, Wang, C L, Wei, N, Wu, X M, Xia, X X, Xie, G F, Xu, Y, Xu, S T, Xue, M L, Yan, W B, Yan, G A, Yang, H X, Yang, J, Yang, S D, Yang, M H, Ye, Y X, Ye, J, Ying, C S, Yu, G W, Yu, C Z, Yuan, J M, Yuan, Y, Yuan, Q, Yue, S L, Zang, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H Y, Zhang, J, Zhang, J M, Zhang, J W, Zhang, L S, Zhang, Q J, Zhang, S Q, Zhang, X Y, Zhang, Y J, Zhang, Yiyun, Zhang, Y Y, Zhang, Z P, Zhang, D X, Zhao, Jiawei, Zhao, J W, Zhao, P P, Zhao, W R, Zhao, Y B, Zhao, Z G, Zhao, J P, Zheng, L S, Zheng, Z P, Zheng, X C, Zhong, B Q, Zhou, G M, Zhou, L, Zhou, N F, Zhou, K J, Zhu, Q M, Zhu, Yingchun, Zhu, Y C, Zhu, Y S, Zhu, Z A, Zhu, B A, Zhuang, and B S, Zou
Abstract: We observe a narrow enhancement near 2m(p) in the invariant mass spectrum of pp pairs from radiative J/psi--gammapp decays. No similar structure is seen in J/psi--pi(0)pp decays. The results are based on an analysis of a 58 x 10(6) event sample of J/psi decays accumulated with the BESII detector at the Beijing electron-positron collider. The enhancement can be fit with either an S- or P-wave Breit-Wigner resonance function. In the case of the S-wave fit, the peak mass is below 2m(p) at M=1859(+3)(-10) (stat)+5-25(syst) MeV/c(2) and the total width is Gamma30 MeV/c(2) at the 90% confidence level. These mass and width values are not consistent with the properties of any known particle.
Published: 2003

41. Measurements of the Cross Section fore+e−→Hadronsat Center-of-Mass Energies from 2 to 5 GeV

Author: J. T. He, Y. Jin, G. S. Huang, Z. P. Zhang, Fei-Fei Liu, J. Z. Bai, L. Zhang, Jiang Changhui, R. Malchow, Qiyang Zhang, P. Q. Li, Yirong Zhu, X. L. Luo, J. W. Zhao, Jing Wang, Y. B. Zhao, P. Wang, G. W. Yu, H. B. Li, B. J. Liu, S. Q. Tang, B.S. Zou, J. Z. Wang, L. P. Fu, Stephen L. Olsen, D. M. Xi, Z. A. Zhu, Z. J. Guo, H. W. Zhao, N. Wu, J. P. Liu, J. W. Zhang, C. C. Zhang, H. Z. Shi, Jiawei Zhao, J. Y. Suh, S. T. Xue, G. A. Yang, X. F. Song, L. S. Wang, M. G. Zhao, Z. J. Ke, W. G. Li, G. Y. Hu, K. L. He, Jian Kang, Feng Shi, G. F. Xu, Hyunyong Kim, D. H. Zhang, X. B. Ji, S. W. Han, Zhengguo Zhao, Y. N. Guo, A. D. Chen, C. S. Yu, G. R. Lu, Guangzhao Zhou, Y. L. Han, C. Y. Yang, Xue-Qian Li, Y. Xu, W. Dunwoodie, F. Lu, Y. X. Ye, Z. P. Mao, Xingzhu Cui, X. C. Meng, Bing Zhou, Yi Chen, Y. K. Que, J. B. Choi, X. X. Xie, X. Y. Shen, W. R. Zhao, T. Hong, J. C. Li, M. He, Li Zhou, H. M. Hu, D. L. Shen, H. S. Chen, He-Run Yang, E. C. Ma, H. L. Zhang, X. R. Qi, T. Hu, S. D. Gu, C. M. Yang, P. L. Wang, X. H. He, Y. Yuan, Y. S. Zhu, S. Q. Zhang, J. G. Bian, B. D. Jones, P. Zhang, G. S. Varner, Tao Liu, Y. B. Liu, X. M. Xia, Jun-Bing Ma, Hongming Zhang, Y. F. Lai, J. He, H. Y. Fu, W. H. Toki, B. W. Shen, Q. H. Hu, J. Li, D. X. Zhao, B. Y. Zhang, Hangxu Li, Xuan Yang, Y. Z. Sun, Y. Y. Wang, Liangfeng Sun, P. P. Zhao, W. B. Yan, Hao-Ze Chen, X. D. Chen, Tai Young Kim, S. W. Ye, F. A. Harris, Q. M. Zhu, W. G. Yan, Z. D. Nie, H. S. Sun, Lei Zhang, X. N. Li, Joseph Izen, G. Rong, Zhen Wang, Y. Z. Huang, W. Yang, J. Nie, Y. S. Dai, Y. Y. Shao, C. S. Gao, Jinxing Zheng, D. Paluselli, C. D. Qian, D. Kong, Z. P. Zheng, S. M. Wang, Y. P. Chu, Z. J. Lu, Junguang Lu, Xiru Huang, Feng Liu, G. L. Tong, B. A. Zhuang, S. P. Chi, K. J. Zhu, H. Park, Yong Ban, J. F. Qiu, D. Li, X. Y. Zhang, R. G. Liu, H. Shen, Seong Keun Kim, R. Y. Li, Cunfeng Wei, Jia Liu, J. C. Chen, Xuanhong Lou, L. S. Zheng, Q. J. Li, Haiwen Liu, J. Y. Zhang, X. H. Mo, M. H. Ye, Y. K. Heng, Y. Y. Zhang, H. Y. Sheng, C. X. Yu, N. D. Qi, H. S. Mao, Z. Z. Du, L. Y. Dong, Wei Li, B. S. Cheng, and Z. X. Liu
Subjects: Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Physics::Accelerator Physics, General Physics and Astronomy, High Energy Physics::Experiment, Center of mass, Atomic physics, Nuclear Experiment
Abstract: We report values of $R\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons})/\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})$ for 85 center-of-mass energies between 2 and $5\mathrm{GeV}$ measured with the upgraded Beijing Spectrometer at the Beijing Electron-Positron Collider.
Published: 2002

42. First measurement of the branching fraction of the decayψ(2S)→τ+τ−

Author: J. Z. Bai, Y. Ban, J. G. Bian, I. Blum, A. D. Chen, H. F. Chen, H. S. Chen, J. Chen, J. C. Chen, X. D. Chen, Y. Chen, Y. B. Chen, B. S. Cheng, S. P. Chi, Y. P. Chu, J. B. Choi, X. Z. Cui, Y. S. Dai, L. Y. Dong, Z. Z. Du, W. Dunwoodie, H. Y. Fu, L. P. Fu, C. S. Gao, P. Gratton, S. D. Gu, Y. F. Gu, Y. N. Guo, Z. J. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, X. He, T. Hong, Y. K. Heng, D. G. Hitlin, G. Y. Hu, H. M. Hu, Q. H. Hu, T. Hu, G. S. Huang, X. P. Huang, Y. Z. Huang, J. M. Izen, X. B. Ji, C. H. Jiang, Y. Jin, B. D. Jones, J. S. Kang, Z. J. Ke, M. H. Kelsey, B. K. Kim, H. J. Kim, S. K. Kim, T. Y. Kim, D. Kong, Y. F. Lai, A. Lankford, D. Li, H. B. Li, H. H. Li, J. Li, J. C. Li, P. Q. Li, Q. J. Li, R. Y. Li, W. Li, W. G. Li, X. N. Li, X. Q. Li, B. Liu, F. Liu, Feng. Liu, H. M. Liu, J. Liu, J. P. Liu, T. R. Liu, R. G. Liu, Y. Liu, Z. X. Liu, X. C. Lou, B. Lowery, G. R. Lu, F. Lu, J. G. Lu, Z. J. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, H. S. Mao, Z. P. Mao, X. C. Meng, X. H. Mo, J. Nie, Z. D. Nie, S. L. Olsen, J. Oyang, D. Paluselli, L. J. Pan, J. Panetta, H. Park, F. Porter, N. D. Qi, X. R. Qi, C. D. Qian, J. F. Qiu, Y. K. Que, G. Rong, M. Schernau, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, X. Y. Shen, H. Y. Sheng, F. Shi, H. Z. Shi, X. F. Song, J. Standifird, J. Y. Suh, H. S. Sun, L. F. Sun, Y. Z. Sun, S. Q. Tang, W. Toki, G. L. Tong, G. S. Varner, J. Wang, J. Z. Wang, L. Wang, L. S. Wang, Meng Wang, P. Wang, P. L. Wang, S. M. Wang, Y. Y. Wang, Z. Y. Wang, M. Weaver, C. L. Wei, J. M. Wu, N. Wu, D. M. Xi, X. M. Xia, X. X. Xie, G. F. Xu, Y. Xu, S. T. Xue, W. B. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, G. A. Yang, H. X. Yang, X. F. Yang, M. H. Ye, S. W. Ye, Y. X. Ye, C. S. Yu, C. X. Yu, G. W. Yu, Y. Yuan, B. Y. Zhang, C. Zhang, C. C. Zhang, D. H. Zhang, H. L. Zhang, H. Y. Zhang, J. Zhang, J. W. Zhang, L. Zhang, L. S. Zhang, P. Zhang, Q. J. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Y. Zhang, Z. P. Zhang, D. X. Zhao, H. W. Zhao, Jiawei Zhao, J. W. Zhao, M. Zhao, P. P. Zhao, W. R. Zhao, Y. B. Zhao, Z. G. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, B. Q. Zhou, G. M. Zhou, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, B. A. Zhuang, and B. S. Zou
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, Value (computer science), Resonance, Particle accelerator, law.invention, Nuclear physics, Particle decay, law, High Energy Physics::Experiment, Collider, Lepton
Abstract: The branching fraction of the psi(2S) decay into tau(+) tau(-) has been measured for the first time using the BES detector at the Beijing Electron-Positron Collider. The result is B-tautau =(2.71+/-0.43+/-0.55) x 10(-3), where the first error is statistical and the second is systematic. This value, along with those for the branching fractions into e(+)c(-) and mu(+)mu(-) of this resonance, satisfy well the relation predicted by the sequential lepton hypothesis. Combining all these values with the leptonic width of the resonance, the total width of the psi(2S) is determined to be (252+/-37) keV.
Published: 2002

43. Radiative Decay of the \psi(2S) into Two Pseudoscalar Mesons

Author: J. Z. Bai, Y. Ban, J. G. Bian, I. Blum, A. D. Chen, G. P. Chen, H. F. Chen, H. S. Chen, J. Chen, J. C. Chen, X. D. Chen, Y. Chen, Y. B. Chen, B. S. Cheng, J. B. Choi, X. Z. Cui, H. L. Ding, L. Y. Dong, Z. Z. Du, W. Dunwoodie, C. S. Gao, M. L. Gao, S. Q. Gao, P. Gratton, J. H. Gu, S. D. Gu, W. X. Gu, Y. N. Guo, Z. J. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, Y. K. Heng, D. G. Hitlin, G. Y. Hu, H. M. Hu, J. L. Hu, Q. H. Hu, T. Hu, G. S. Huang, X. P. Huang, Y. Z. Huang, J. M. Izen, C. H. Jiang, Y. Jin, B. D. Jones, X. Ju, J. S. Kang, Z. J. Ke, M. H. Kelsey, B. K. Kim, H. J. Kim, S. K. Kim, T. Y. Kim, D. Kong, Y. F. Lai, P. F. Lang, A. Lankford, C. G. Li, D. Li, H. B. Li, J. Li, J. C. Li, P. Q. Li, W. Li, W. G. Li, X. H. Li, X. N. Li, X. Q. Li, Z. C. Li, B. Liu, F. Liu, Feng. Liu, H. M. Liu, J. Liu, J. P. Liu, R. G. Liu, Y. Liu, Z. X. Liu, X. C. Lou, B. Lowery, G. R. Lu, F. Lu, J. G. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, H. S. Mao, Z. P. Mao, X. C. Meng, X. H. Mo, J. Nie, S. L. Olsen, J. Oyang, D. Paluselli, L. J. Pan, J. Panetta, H. B. Park, F. Porter, N. D. Qi, X. R. Qi, C. D. Qian, J. F. Qiu, Y. H. Qu, Y. K. Que, G. Rong, M. Schernau, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, H. Y. Shen, X. Y. Shen, F. Shi, H. Z. Shi, X. F. Song, J. Standifird, J. Y. Suh, H. S. Sun, L. F. Sun, Y. Z. Sun, S. Q. Tang, W. Toki, G. L. Tong, G. S. Varner, F. Wang, L. Wang, L. S. Wang, L. Z. Wang, P. Wang, P. L. Wang, S. M. Wang, Y. Y. Wang, Z. Y. Wang, M. Weaver, C. L. Wei, N. Wu, Y. G. Wu, D. M. Xi, X. M. Xia, Y. Xie, Y. H. Xie, G. F. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, H. X. Yang, W. Yang, X. F. Yang, M. H. Ye, S. W. Ye, Y. X. Ye, C. S. Yu, C. X. Yu, G. W. Yu, Y. H. Yu, Z. Q. Yu, C. Z. Yuan, Y. Yuan, B. Y. Zhang, C. Zhang, C. C. Zhang, D. H. Zhang, Dehong Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. Zhang, Lei. Zhang, L. S. Zhang, P. Zhang, Q. J. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Y. Zhang, D. X. Zhao, H. W. Zhao, Jiawei Zhao, J. W. Zhao, M. Zhao, W. R. Zhao, Z. G. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, B. Q. Zhou, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, and B. A. Zhuang
Subjects: Physics, Nuclear physics, Pseudoscalar, Nuclear and High Energy Physics, Meson, Branching fraction, Electron–positron annihilation, Excited state, Radiative transfer, Radiative decay, Gluon, High Energy Physics - Experiment
Abstract: Radiative decays of the radially excited charmonium resonance, \psi(2S), into \pi\pi, K Kbar and \eta\eta final states have been measured in a sample of 3.96 * 10^6 \psi(2S) events collected by the BES collaboration. The branching ratios B(\psi(2S) -> \gamma f_{2}(1270)) = (2.27 +- 0.26 +- 0.39) * 10^{-4} and B(\psi(2S) -> \gamma f_0(1710)) * B(f_0(1710) -> K^+ K^-) = (5.59 +- 1.12 +- 0.93) * 10^{-5} are obtained. When compared to the corresponding radiative J/\psi decays, the observed \psi(2S) radiative decay rates into \gamma f_2(1270) and \gamma f_0(1710) are consistent with the 15% rule., Comment: 7 pages, 5 figures
Published: 2001

44. Measurements of the cross section for e(+)e(-) --hadrons at center-of-mass energies from 2 to 5 GeV

Author: J Z, Bai, Y, Ban, J G, Bian, A D, Chen, H F, Chen, H S, Chen, J C, Chen, X D, Chen, Y B, Chen, B S, Cheng, S P, Chi, Y P, Chu, J B, Choi, X Z, Cui, Y S, Dai, L Y, Dong, Z Z, Du, W, Dunwoodie, H Y, Fu, L P, Fu, C S, Gao, S D, Gu, Y N, Guo, Z J, Guo, S W, Han, Y, Han, F A, Harris, J, He, J T, He, K L, He, M, He, X, He, T, Hong, Y K, Heng, G Y, Hu, H M, Hu, Q H, Hu, T, Hu, G S, Huang, X P, Huang, Y Z, Huang, J M, Izen, X B, Ji, C H, Jiang, Y, Jin, B D, Jones, J S, Kang, Z J, Ke, H J, Kim, S K, Kim, T Y, Kim, D, Kong, Y F, Lai, D, Li, H B, Li, H H, Li, J, Li, J C, Li, P Q, Li, Q J, Li, R Y, Li, W, Li, W G, Li, X N, Li, X Q, Li, B, Liu, F, Liu, Feng, Liu, H M, Liu, J, Liu, J P, Liu, T R, Liu, R G, Liu, Y, Liu, Z X, Liu, X C, Lou, G R, Lu, F, Lu, J G, Lu, Z J, Lu, X L, Luo, E C, Ma, J M, Ma, R, Malchow, H S, Mao, Z P, Mao, X C, Meng, X H, Mo, J, Nie, Z D, Nie, S L, Olsen, D, Paluselli, H, Park, N D, Qi, X R, Qi, C D, Qian, J F, Qiu, Y K, Que, G, Rong, Y Y, Shao, B W, Shen, D L, Shen, H, Shen, X Y, Shen, H Y, Sheng, F, Shi, H Z, Shi, X F, Song, J Y, Suh, H S, Sun, L F, Sun, Y Z, Sun, S Q, Tang, W, Toki, G L, Tong, G S, Varner, J, Wang, J Z, Wang, L, Wang, L S, Wang, P, Wang, P L, Wang, S M, Wang, Y Y, Wang, Z Y, Wang, C L, Wei, N, Wu, D M, Xi, X M, Xia, X X, Xie, G F, Xu, Y, Xu, S T, Xue, W B, Yan, W G, Yan, C M, Yang, C Y, Yang, G A, Yang, H X, Yang, W, Yang, X F, Yang, M H, Ye, S W, Ye, Y X, Ye, C S, Yu, C X, Yu, G W, Yu, Y, Yuan, B Y, Zhang, C, Zhang, C C, Zhang, D H, Zhang, H L, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, L, Zhang, L S, Zhang, P, Zhang, Q J, Zhang, S Q, Zhang, X Y, Zhang, Y Y, Zhang, Z P, Zhang, D X, Zhao, H W, Zhao, Jiawei, Zhao, J W, Zhao, M, Zhao, P P, Zhao, W R, Zhao, Y B, Zhao, Z G, Zhao, J P, Zheng, L S, Zheng, Z P, Zheng, B Q, Zhou, G M, Zhou, L, Zhou, K J, Zhu, Q M, Zhu, Y C, Zhu, Y S, Zhu, Z A, Zhu, B A, Zhuang, and B S, Zou
Abstract: We report values of R = sigma(e(+)e(-)--hadrons)/sigma(e(+)e(-)--mu(+)mu(-)) for 85 center-of-mass energies between 2 and 5 GeV measured with the upgraded Beijing Spectrometer at the Beijing Electron-Positron Collider.
Published: 2001

45. Measurement of the mass and full width of theηcmeson

Author: J. Z. Bai, Y. Ban, J. G. Bian, I. Blum, A. D. Chen, G. P. Chen, H. F. Chen, H. S. Chen, J. Chen, J. C. Chen, X. D. Chen, Y. Chen, Y. B. Chen, B. S. Cheng, J. B. Choi, X. Z. Cui, H. L. Ding, L. Y. Dong, Z. Z. Du, W. Dunwoodie, C. S. Gao, M. L. Gao, S. Q. Gao, P. Gratton, J. H. Gu, S. D. Gu, W. X. Gu, Y. N. Guo, Z. J. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, Y. K. Heng, D. G. Hitlin, G. Y. Hu, H. M. Hu, J. L. Hu, Q. H. Hu, T. Hu, G. S. Huang, X. P. Huang, Y. Z. Huang, J. M. Izen, C. H. Jiang, Y. Jin, B. D. Jones, X. Ju, J. S. Kang, Z. J. Ke, M. H. Kelsey, B. K. Kim, H. J. Kim, S. K. Kim, T. Y. Kim, D. Kong, Y. F. Lai, P. F. Lang, A. Lankford, C. G. Li, D. Li, H. B. Li, J. Li, J. C. Li, P. Q. Li, W. Li, W. G. Li, X. H. Li, X. N. Li, X. Q. Li, Z. C. Li, B. Liu, F. Liu, Feng. Liu, H. M. Liu, J. Liu, J. P. Liu, R. G. Liu, Y. Liu, Z. X. Liu, X. C. Lou, B. Lowery, G. R. Lu, F. Lu, J. G. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, H. S. Mao, Z. P. Mao, X. C. Meng, X. H. Mo, J. Nie, S. L. Olsen, J. Oyang, D. Paluselli, L. J. Pan, J. Panetta, H. Park, F. Porter, N. D. Qi, X. R. Qi, C. D. Qian, J. F. Qiu, Y. H. Qu, Y. K. Que, G. Rong, M. Schernau, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, H. Y. Shen, X. Y. Shen, F. Shi, H. Z. Shi, X. F. Song, J. Standifird, J. Y. Suh, H. S. Sun, L. F. Sun, Y. Z. Sun, S. Q. Tang, W. Toki, G. L. Tong, G. S. Varner, F. Wang, L. Wang, L. S. Wang, L. Z. Wang, P. Wang, P. L. Wang, S. M. Wang, Y. Y. Wang, Z. Y. Wang, M. Weaver, C. L. Wei, N. Wu, Y. G. Wu, D. M. Xi, X. M. Xia, Y. Xie, Y. H. Xie, G. F. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, H. X. Yang, W. Yang, X. F. Yang, M. H. Ye, S. W. Ye, Y. X. Ye, C. S. Yu, C. X. Yu, G. W. Yu, Y. H. Yu, Z. Q. Yu, C. Z. Yuan, Y. Yuan, B. Y. Zhang, C. Zhang, C. C. Zhang, D. H. Zhang, Dehong Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. Zhang, Lei. Zhang, L. S. Zhang, P. Zhang, Q. J. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Y. Zhang, D. X. Zhao, H. W. Zhao, Jiawei Zhao, J. W. Zhao, M. Zhao, W. R. Zhao, Z. G. Zhao, J. P. Zheng, L. S. Zheng, Y. H. Zheng, Z. P. Zheng, B. Q. Zhou, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, Z. A. Zhu, and B. A. Zhuang
Subjects: Physics, Nuclear and High Energy Physics, Particle decay, Crystallography, Pion, Meson, Electron–positron annihilation, Hadron, Mass spectrum, Elementary particle, Quarkonium
Abstract: In a sample of 7.8 million J/{psi} decays collected in the Beijing Spectrometer, the process J/{psi}{yields}{gamma}{eta}{sub c} is observed for five different {eta}{sub c} decay channels: K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}, {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -}, K{sup {+-}}K{sub S}{sup 0}{pi}{sup {+-}} (with K{sub S}{sup 0}{yields}{pi}{sup +}{pi}{sup -}), {phi}{phi} (with {phi}{yields}K{sup +}K{sup -}) and K{sup +}K{sup -}{pi}{sup 0}. From these signals, we determine the mass of {eta}{sub c} to be 2976.6{+-}2.9{+-}1.3 MeV. Combining this result with a previously reported result from a similar study using {psi}(2S){yields}{gamma}{eta}{sub c} detected in the same spectrometer gives m{sub {eta}{sub c}}=2976.3{+-}2.3{+-}1.2 MeV. For the combined samples, we obtain {gamma}{sub {eta}{sub c}}=11.0{+-}8.1{+-}4.1 MeV. (c) 2000 The American Physical Society.
Published: 2000

46. Measurement of $\psi(2S)$ decays to baryon pairs

Author: X. H. Mo, L. S. Wang, M. H. Ye, N. Wu, M. H. Kelsey, H. W. Zhao, X. Q. Li, Q. H. Hu, Qiyang Zhang, J. Panetta, Y. C. Zhu, D. X. Zhao, B. Y. Zhang, Jiemin Li, Dehong Zhang, Y. Y. Wang, P. Wang, S. D. Gu, P. L. Wang, H. Y. Shen, Z. J. Guo, Y. Jin, J. He, M. L. Gao, Jiawei Zhao, F. Lu, Y. H. Xie, G. S. Varner, Miao He, S. Q. Gao, Z. J. Ke, C. Y. Yang, Y. B. Chen, G. P. Chen, F. A. Harris, Y. F. Lai, Tai Young Kim, S. W. Ye, M. Weaver, H. F. Chen, W. Dunwoodie, W. X. Gu, L. P. Zhou, F. Wang, W. D. Li, S. T. Xue, Xingzhu Cui, J. G. Lu, W. H. Toki, Liangfeng Sun, J. Y. Suh, Z. P. Mao, G. Y. Hu, C. Z. Yuan, Michael Schernau, W. Yang, J. Nie, H. X. Yang, K. L. He, D. M. Xi, S. W. Han, T. Hu, Xuan Yang, J. Yan, H. Shen, B. K. Kim, J. F. Qiu, Y. Y. Shao, J. W. Zhao, J. P. Liu, Y. G. Xie, J. Chen, C. S. Gao, S. L. Olsen, Z. Q. Yu, G. F. Xu, Chun-Hua Jiang, D. Kong, D. G. Hitlin, B. D. Jones, Jinxing Zheng, Z. C. Li, Y. K. Que, H. M. Hu, G. W. Yu, W. G. Yan, B. W. Shen, S. M. Wang, Cunfeng Wei, Jun-Bing Ma, J. Oyang, Z. Y. Wang, C. C. Zhang, J. W. Zhang, Jian Kang, H. S. Chen, H. L. Ding, X. D. Chen, L. Zhang, B. J. Liu, X. C. Meng, J. Standifird, Y. H. Qu, S. Q. Tang, Lu Zhang, Lei Zhang, P. F. Lang, J. B. Choi, Y. Ban, G. R. Lu, Joseph Izen, G. Rong, H. Z. Shi, B. Lowery, J. Z. Bai, Cheng-Kui Li, X. F. Song, Z. A. Zhu, D. L. Shen, C. X. Yu, K. J. Zhu, Y. Yuan, Y. H. Yu, Y. S. Zhu, L. Z. Wang, N. D. Qi, Q. M. Zhu, Feng Shi, X. Ju, S. K. Kim, Z. Z. Du, Y. X. Ye, P. Gratton, X. M. Xia, G. S. Huang, Z. X. Liu, P. Q. Li, H. S. Sun, X. N. Li, W. G. Li, J. G. Bian, J. Y. Zhang, X. H. Li, X. Y. Shen, X. L. Luo, H. M. Liu, Y. K. Heng, Y. Y. Zhang, Z. G. Zhao, J. L. Hu, Y. G. Wu, C. D. Qian, H. B. Li, M. G. Zhao, Hyunyong Kim, D. Paluselli, J. C. Li, J. J. He, D. H. Zhang, C. S. Yu, J. C. Chen, Xuanhong Lou, R. Malchow, E. C. Ma, L. S. Zheng, H. L. Zhang, Y. B. Liu, A. J. Lankford, D. Li, X. Y. Zhang, R. G. Liu, H. Park, Y. L. Han, H. S. Mao, L. Y. Dong, B. S. Cheng, J. H. Gu, Bing Zhou, L. J. Pan, S. Q. Zhang, Y. Z. Sun, Y. N. Guo, A. D. Chen, I. Blum, Y. Z. Huang, W. R. Zhao, F. Liu, F. C. Porter, X. R. Qi, Z. P. Zheng, Peng Zhang, Xiru Huang, Feng Liu, G. L. Tong, B. A. Zhuang, and C. M. Yang
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Perturbative QCD, Lambda, Omega, High Energy Physics - Experiment, Baryon, Factorization, Mass spectrum, High Energy Physics::Experiment
Abstract: A sample of 3.95M $\psi(2S)$ decays registered in the BES detector are used to study final states containing pairs of octet and decuplet baryons. We report branching fractions for $\psi(2S)\to p\bar{p}$, $\Lambda\bar{\Lambda}$, $\Sigma^0\bar{\Sigma}{}^0$, $\Xi^-\bar{\Xi}{}^+$, $\Delta^{++}\bar{\Delta}{}^{--}$, $\Sigma^+(1385)\bar{\Sigma}{}^-(1385)$, $\Xi^0(1530)\bar{\Xi}{}^0(1530)$, and $\Omega^-\bar{\Omega}{}^+$. These results are compared to expectations based on the SU(3)-flavor symmetry, factorization, and perturbative QCD., Comment: 22 pages, 21 figures, 4 tables
Published: 2000

47. Direct measurement ofB(D0→φX0)andB(D+→φX+)

Author: J. Z. Bai, Y. Ban, J. G. Bian, I. Blum, G. P. Chen, H. F. Chen, J. Chen, J. C. Chen, Y. Chen, Y. B. Chen, Y. Q. Chen, B. S. Cheng, X. Z. Cui, H. L. Ding, L. Y. Dong, Z. Z. Du, W. Dunwoodie, C. S. Gao, M. L. Gao, S. Q. Gao, P. Gratton, J. H. Gu, S. D. Gu, W. X. Gu, Y. F. Gu, Y. N. Guo, Z. J. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, Y. K. Heng, D. G. Hitlin, G. Y. Hu, H. M. Hu, J. L. Hu, Q. H. Hu, T. Hu, X. Q. Hu, Y. Z. Huang, G. S. Huang, J. M. Izen, C. H. Jiang, Y. Jin, B. D. Jones, X. Ju, Z. J. Ke, M. H. Kelsey, B. K. Kim, D. Kong, Y. F. Lai, P. F. Lang, A. Lankford, C. G. Li, D. Li, H. B. Li, J. Li, J. C. Li, P. Q. Li, R. B. Li, W. Li, W. G. Li, X. H. Li, X. N. Li, H. M. Liu, J. Liu, R. G. Liu, Y. Liu, X. C. Lou, B. Lowery, F. Lu, J. G. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, M. Mandelkern, H. S. Mao, Z. P. Mao, X. C. Meng, J. Nie, S. L. Olsen, J. Oyang, D. Paluselli, L. J. Pan, J. Panetta, F. Porter, N. D. Qi, X. R. Qi, C. D. Qian, J. F. Qiu, Y. H. Qu, Y. K. Que, G. Rong, M. Schernau, B. Schmid, J. Schultz, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, X. Y. Shen, H. Y. Sheng, H. Z. Shi, X. F. Song, J. Standifird, D. Stoker, F. Sun, H. S. Sun, Y. Sun, Y. Z. Sun, S. Q. Tang, W. Toki, G. L. Tong, G. S. Varner, F. Wang, L. S. Wang, L. Z. Wang, M. Wang, P. Wang, P. L. Wang, S. M. Wang, T. J. Wang, Y. Y. Wang, M. Weaver, C. L. Wei, N. Wu, Y. G. Wu, D. M. Xi, X. M. Xia, P. P. Xie, Y. Xie, Y. H. Xie, G. F. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, H. X. Yang, J. Yang, W. Yang, X. F. Yang, M. H. Ye, S. W. Ye, Y. X. Ye, C. S. Yu, C. X. Yu, G. W. Yu, Y. H. Yu, Z. Q. Yu, C. Z. Yuan, Y. Yuan, B. Y. Zhang, C. Zhang, C. C. Zhang, D. H. Zhang, Dehong Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. Zhang, L. S. Zhang, P. Zhang, Q. J. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Y. Zhang, D. X. Zhao, H. W. Zhao, Jiawei Zhao, J. W. Zhao, M. Zhao, W. R. Zhao, Z. G. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, B. Q. Zhou, G. P. Zhou, H. S. Zhou, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, and B. A. Zhuang
Subjects: Combinatorics, Physics, Nuclear and High Energy Physics, D meson
Abstract: Author(s): Bai, JZ; Ban, Y; Bian, JG; Blum, I; Chen, GP; Chen, HF; Chen, J; Chen, JC; Chen, Y; Chen, YB; Chen, YQ; Cheng, BS; Cui, XZ; Ding, HL; Dong, LY; Du, ZZ; Dunwoodie, W; Gao, CS; Gao, ML; Gao, SQ; Gratton, P; Gu, JH; Gu, SD; Gu, WX; Gu, YF; Guo, YN; Guo, ZJ; Han, SW; Han, Y; Harris, FA; He, J; He, JT; He, KL; He, M; Heng, YK; Hitlin, DG; Hu, GY; Hu, HM; Hu, JL; Hu, QH; Hu, T; Hu, XQ; Huang, YZ; Huang, GS; Izen, JM; Jiang, CH; Jin, Y; Jones, BD; Ju, X; Ke, ZJ; Kelsey, MH; Kim, BK; Kong, D; Lai, YF; Lang, PF; Lankford, A; Li, CG; Li, D; Li, HB; Li, J; Li, JC; Li, PQ; Li, RB; Li, W; Li, WG; Li, XH; Li, XN; Liu, HM; Liu, J; Liu, RG; Liu, Y; Lou, XC; Lowery, B; Lu, F; Lu, JG; Luo, XL; Ma, EC; Ma, JM; Malchow, R; Mandelkern, M; Mao, HS; Mao, ZP; Meng, XC; Nie, J; Olsen, SL | Abstract: The first measurement of (Formula presented) and an upper limit for (Formula presented) are determined from 22.3 (Formula presented) of (Formula presented) annihilation data at a c.m. energy of 4.03 GeV. The data were recorded by the Beijing Spectrometer (BES) at BEPC. A recoil charge method is applied to charm threshold data to determine the charge of the D meson in the recoil from (Formula presented) reconstructed (Formula presented) (Formula presented) mesons. The branching fractions (Formula presented) and (Formula presented) are determined from 10 events with a reconstructed D and a recoiling (Formula presented) In addition, a 90% C.L. upper limit of (Formula presented) is determined from a search for semileptonic decays of the (Formula presented) © 2000 The American Physical Society.
Published: 2000

48. ψ(2S)→π+π−J/ψdecay distributions

Author: J. Z. Bai, Y. Ban, J. G. Bian, I. Blum, G. P. Chen, H. F. Chen, J. Chen, J. C. Chen, Y. Chen, Y. B. Chen, Y. Q. Chen, B. S. Cheng, X. Z. Cui, H. L. Ding, L. Y. Dong, Z. Z. Du, W. Dunwoodie, C. S. Gao, M. L. Gao, S. Q. Gao, P. Gratton, J. H. Gu, S. D. Gu, W. X. Gu, Y. F. Gu, Z. J. Guo, Y. N. Guo, S. W. Han, Y. Han, F. A. Harris, J. He, J. T. He, K. L. He, M. He, Y. K. Heng, D. G. Hitlin, G. Y. Hu, H. M. Hu, J. L. Hu, Q. H. Hu, T. Hu, X. Q. Hu, G. S. Huang, Y. Z. Huang, J. M. Izen, C. H. Jiang, Y. Jin, B. D. Jones, X. Ju, Z. J. Ke, M. H. Kelsey, B. K. Kim, D. Kong, Y. F. Lai, P. F. Lang, A. Lankford, C. G. Li, D. Li, H. B. Li, J. Li, J. C. Li, P. Q. Li, R. B. Li, W. Li, W. G. Li, X. H. Li, X. N. Li, H. M. Liu, J. Liu, R. G. Liu, Y. Liu, X. C. Lou, B. Lowery, F. Lu, J. G. Lu, X. L. Luo, E. C. Ma, J. M. Ma, R. Malchow, H. S. Mao, Z. P. Mao, X. C. Meng, J. Nie, S. L. Olsen, J. Oyang, D. Paluselli, L. J. Pan, J. Panetta, F. Porter, N. D. Qi, X. R. Qi, C. D. Qian, J. F. Qiu, Y. H. Qu, Y. K. Que, G. Rong, M. Schernau, Y. Y. Shao, B. W. Shen, D. L. Shen, H. Shen, X. Y. Shen, H. Y. Sheng, H. Z. Shi, X. F. Song, J. Standifird, F. Sun, H. S. Sun, Y. Sun, Y. Z. Sun, S. Q. Tang, W. Toki, G. L. Tong, G. S. Varner, F. Wang, L. S. Wang, L. Z. Wang, M. Wang, P. Wang, P. L. Wang, S. M. Wang, T. J. Wang, Y. Y. Wang, M. Weaver, C. L. Wei, N. Wu, Y. G. Wu, D. M. Xi, X. M. Xia, P. P. Xie, Y. Xie, Y. H. Xie, G. F. Xu, S. T. Xue, J. Yan, W. G. Yan, C. M. Yang, C. Y. Yang, H. X. Yang, J. Yang, W. Yang, X. F. Yang, M. H. Ye, S. W. Ye, Y. X. Ye, C. S. Yu, C. X. Yu, G. W. Yu, Y. H. Yu, Z. Q. Yu, C. Z. Yuan, Y. Yuan, B. Y. Zhang, C. Zhang, C. C. Zhang, D. H. Zhang, Dehong Zhang, H. L. Zhang, J. Zhang, J. W. Zhang, L. Zhang, L. S. Zhang, P. Zhang, Q. J. Zhang, S. Q. Zhang, X. Y. Zhang, Y. Y. Zhang, D. X. Zhao, H. W. Zhao, Jiawei Zhao, J. W. Zhao, M. Zhao, W. R. Zhao, Z. G. Zhao, J. P. Zheng, L. S. Zheng, Z. P. Zheng, B. Q. Zhou, G. P. Zhou, H. S. Zhou, L. Zhou, K. J. Zhu, Q. M. Zhu, Y. C. Zhu, Y. S. Zhu, and B. A. Zhuang
Subjects: Physics, Nuclear and High Energy Physics, Mathematical physics
Abstract: Author(s): Bai, JZ; Ban, Y; Bian, JG; Blum, I; Chen, GP; Chen, HF; Chen, J; Chen, JC; Chen, Y; Chen, YB; Chen, YQ; Cheng, BS; Cui, XZ; Ding, HL; Dong, LY; Du, ZZ; Dunwoodie, W; Gao, CS; Gao, ML; Gao, SQ; Gratton, P; Gu, JH; Gu, SD; Gu, WX; Gu, YF; Guo, ZJ; Guo, YN; Han, SW; Han, Y; Harris, FA; He, J; He, JT; He, KL; He, M; Heng, YK; Hitlin, DG; Hu, GY; Hu, HM; Hu, JL; Hu, QH; Hu, T; Hu, XQ; Huang, GS; Huang, YZ; Izen, JM; Jiang, CH; Jin, Y; Jones, BD; Ju, X; Ke, ZJ; Kelsey, MH; Kim, BK; Kong, D; Lai, YF; Lang, PF; Lankford, A; Li, CG; Li, D; Li, HB; Li, J; Li, JC; Li, PQ; Li, RB; Li, W; Li, WG; Li, XH; Li, XN; Liu, HM; Liu, J; Liu, RG; Liu, Y; Lou, XC; Lowery, B; Lu, F; Lu, JG; Luo, XL; Ma, EC; Ma, JM; Malchow, R; Mao, HS; Mao, ZP; Meng, XC; Nie, J; Olsen, SL; Oyang, J | Abstract: Using a sample of 3.8 M (Formula presented) events accumulated with the BES detector, the process (Formula presented) is studied. The angular distributions are compared with the general decay amplitude analysis of Cahn. We find that the dipion system requires some D wave amplitude, as well as S wave. On the other hand, the (Formula presented) relative angular momentum is consistent with being pure S wave. The decay distributions have been fit to heavy quarkonium models, including the Novikov-Shifman model. This model, which is written in terms of the parameter (Formula presented) predicts that D wave pions should be present. We determine (Formula presented) based on the joint (Formula presented) distribution. The fraction of D wave amplitude as a function of (Formula presented) is found to decrease with increasing (Formula presented) in agreement with the model. We have also fit the Mannel-Yan model, which is another model that allows D wave pions. © 2000 The American Physical Society.
Published: 2000

49. Measurement of the inclusive charm cross section at 4.03 GeV and 4.14 GeV

Author: Q. H. Hu, T. J. Wang, H. Z. Shi, F. Sun, H. W. Zhao, M. G. Zhao, X. F. Song, Xuan Yang, C. M. Yang, X. C. Meng, L. Z. Wang, M. H. Kelsey, F. Lu, Y. H. Qu, J. Standifird, N. Wu, Hao-Ze Chen, Jiming Yang, Cen Zhang, Y. X. Ye, J. C. Li, B. K. Kim, W. G. Yan, J. Panetta, C. Y. Yang, H. Shen, W. R. Zhao, J. Oyang, Y. C. Zhu, J. He, Z. P. Zheng, X. L. Luo, Jun-Bing Ma, J. Schultz, Lei Zhang, Joseph Izen, G. L. Tong, J. Li, B. A. Zhuang, M. L. Gao, S. W. Han, G. F. Xu, M. Mandelkern, C. Z. Yuan, Y. Yuan, Y. H. Yu, Y. S. Zhu, R. B. Li, J. L. Hu, P. Zhang, X. Y. Shen, X. R. Qi, Y. G. Wu, H. S. Zhou, Yuehong Xie, H. B. Li, B. W. Shen, Yuanbo Chen, Y. K. Que, J. Chen, Li Zhou, H. M. Hu, Q. M. Zhu, G. P. Chen, Dehong Zhang, P. L. Wang, F. Wang, C. C. Zhang, Cunfeng Wei, Qiyang Zhang, Y. W. Liu, Z. P. Mao, Y. F. Lai, F. A. Harris, S. Q. Tang, Xuanhong Lou, R. Malchow, Y. N. Guo, Y. Jin, P. F. Lang, I. Blum, Frank C. Porter, S. D. Gu, Xuan Zhang, M. Wang, P. Wang, Yong Ban, J. F. Qiu, L. S. Zheng, Y. Z. Huang, D. M. Xi, J. Yan, L. J. Pan, J. T. He, S. W. Ye, H. M. Liu, M. Weaver, D. Paluselli, D. Li, Y. Q. Chen, J. Y. Zhang, G. S. Varner, Z. Q. Yu, Xingzhu Cui, G. W. Yu, G. Rong, R. G. Liu, J. W. Zhang, S. T. Xue, Y. J. Sun, C. D. Qian, Z. J. Guo, Y. L. Han, W. X. Gu, Y. K. Heng, Y. Y. Zhang, H. X. Yang, G. Y. Hu, W. H. Toki, H. S. Sun, Jiang Changhui, Y. B. Chen, Jiawei Zhao, Y. H. Xie, Guangshun Huang, J. W. Zhao, Z. G. Zhao, S. Q. Gao, Z. J. Ke, D. X. Zhao, B. Y. Zhang, He Kai, L. S. Wang, Y. Z. Sun, Y. Y. Wang, M. H. Ye, D. P. Stoker, Bing Zhou, Michael Schernau, W. Yang, L. Zhang, S. Q. Zhang, J. G. Bian, J. Nie, H. S. Mao, L. Y. Dong, B. S. Cheng, Y. Y. Shao, J. H. Gu, C. S. Gao, Jinxing Zheng, B. Lowery, B. Schmid, W. Dunwoodie, T. Hu, W. G. Li, D. G. Hitlin, B. D. Jones, P. P. Xie, X. Ju, Z. Z. Du, Wei Li, P. Q. Li, J. P. Liu, X. Q. Hu, J. Z. Bai, Y. F. Gu, H. Y. Sheng, C. X. Yu, N. D. Qi, M. He, D. L. Shen, P. Gratton, X. M. Xia, D. Kong, S. M. Wang, Junguang Lu, G. P. Zhou, Cheng-Kui Li, K. J. Zhu, H. L. Ding, Xingguo Li, Stephen L. Olsen, D. H. Zhang, C. S. Yu, A. J. Lankford, X. N. Li, E. C. Ma, and H. L. Zhang
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, Spectrometer, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Extrapolation, FOS: Physical sciences, 01 natural sciences, Spectral line, High Energy Physics - Experiment, Nuclear physics, Momentum, High Energy Physics - Experiment (hep-ex), Cross section (physics), 0103 physical sciences, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics
Abstract: The cross section for charmed meson production at $\sqrt{s} = 4.03 $ and 4.14 GeV has been measured with the Beijing Spectrometer. The measurement was made using 22.3 $pb^{-1}$ of $e^+e^-$ data collected at 4.03 GeV and 1.5 $pb^{-1}$ of $e^+e^-$ data collected at 4.14 GeV. Inclusive observed cross sections for the production of charged and neutral D mesons and momentum spectra are presented. Observed cross sections were radiatively corrected to obtain tree level cross sections. Measurements of the total hadronic cross section are obtained from the charmed meson cross section and an extrapolation of results from below the charm threshold., Comment: 11 pages, 13 figures. The top level tex file is paper.tex. It builds the paper from other tex files in this .tar and the .eps files
Published: 2000

50. Study on hydroxyapatite-coated titanium implants used as orthodontic anchorage--an experimental investigation of implant stability and peri-implant neck tissue in dogs

Author: X, Liang, S Q, Tang, D, Lu, Z H, Zhao, Y L, Chao, and H, Wang
Subjects: Dental Implants, Male, Dogs, Osseointegration, Dental Implantation, Endosseous, Alveolar Bone Loss, Gingiva, Animals, Orthodontic Appliance Design, Mandible, Periodontal Index
Abstract: Hydroxyapatite-coated titanium endosseous implants as orthodontic anchorage were studied.These implants, installed in the mandibles of two dogs, were loaded with the orthodontic force of 150 g for 3 months. The stability of the implant and peri-implant neck tissue were investigated with radiograph and index evaluation.No implants were mobile, loosened or dislocated at the 3-month follow-up. The soft tissue around the cervical part of the implants had slight inflammation because of poor oral hygiene and stimulation of residual foods attached to the stainless steel spring. However, no resorption of marginal alveolar bone was found under sustained orthodontic force.The HA-coated titanium implant can be used as anchorage for short-term orthodontic treatment.
Published: 1999

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