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101. First Observation of theM1Transitionψ(3686)→γηc(2S)

Author: C. Q. Feng, L. Zhang, Z. Jiao, Z. A. Zhu, B. Q. Wang, M. Bertani, Y. Ma, C. P. Shen, B. Zhong, J. Q. Zhang, Zhe Sun, X. S. Qin, C. Nicholson, Qingming Ma, Zhiqing Liu, Y. B. Chen, Feng Liu, Chang Liu, J. Z. Zhang, M. Ullrich, X. D. Ruan, H. H. Liu, T. R. Zhang, K. Wang, Kun Liu, Shisong Fang, F. F. An, Y. H. Guan, X. H. Liu, X. H. Mo, M. H. Gu, L. Yu, X. R. Li, Q. J. Wang, J. P. Liu, Y. P. Guo, J. K. C. Leung, G. Li, A. Q. Guo, Jianping Zheng, W. L. Yuan, Ling Zhao, H. Loehner, J. B. Jiao, M. Lv, J. G. Zhang, X. T. Liao, Y. P. Chu, Junguang Lu, C. F. Qiao, J. Z. Bai, Y. T. Gu, J. C. Chen, Lei Zhao, Z. Y. He, G. Chelkov, Yang Yang, C. L. Ma, H. Xu, F. C. Ma, I. Boyko, Y. Zeng, J. Zhuang, L. H. Wu, M. X. Luo, Y. H. Yan, Z. Ning, X. L. Wang, X. S. Jiang, J. S. Huang, C. Geng, A. Zhemchugov, R. A. Briere, D. H. Zhang, H. B. Liu, S. L. Li, R. B. Ferroli, C. S. Ji, T. Yang, L. Y. Dong, L. K. Jia, I. Denysenko, E. Boger, B. X. Zhang, Y. J. Mao, Niklaus Berger, S. Pacetti, Zhiqiang Liu, Miao He, Q. An, B. X. Yu, D. P. Jin, W. Kuehn, J. F. Hu, X. L. Li, S. X. Wu, B. S. Zou, T. J. Min, Xiujuan Tang, X. N. Li, Brent J. Liu, M. Destefanis, Feng Li, G. M. Xu, H. M. Hu, H. Mao, Haiping Peng, X. Cai, Y. T. Liang, Zhihao Xu, Chuan Liu, Zong-Ping Zheng, Z. H. Qin, J. H. Zou, Xie-Yan Song, W. X. Gong, G. M. Huang, D. J. Ambrose, Chang-Zheng Yuan, P. Weidenkaff, J. Zhang, M. Kavatsyuk, A. Sarantsev, Tao Luo, B. Wang, Z. Y. Deng, Daniel P Cronin-Hennessy, Xingtao Huang, A. Denig, Q. Ouyang, Sai-Juan Chen, K. Li, Michael Werner, E. H. Thorndike, Chun S. J. Pun, V. Bytev, Li Yan, H. L. Ma, C. Motzko, S. L. Olsen, Y. Qin, M. Shao, Xian Lun Zhu, C. D. Fu, N. Yu. Muchnoi, Y. Nefedov, D. H. Sun, Hang Liu, J. S. Lange, L. B. Guo, M. G. Zhao, T. C. Zhao, J. L. Ping, X. D. Sun, R. Poling, G. R. Lu, X. F. Wang, Huihui Liu, Fu-Hu Liu, Y. H. Zhang, Q. W. Lu, H. X. Yang, K. J. Zhu, Jingwei Zhao, A. Calcaterra, X. W. Zhu, O. Bondarenko, Yu-Bin Liu, H. H. Zhang, Jiangchao Li, Z. G. Zhao, Yuanbo Chen, Q. J. Xu, J. G. Messchendorp, S. B. Liu, Joong-Won Park, Q. G. Wen, Xuantong Zhang, C. X. Liu, L. Fava, Y. X. Yang, S. H. Zhang, H. L. Dai, Jie Yu, D. H. Wei, Yao Wang, Y. Yuan, Q. L. Xiu, E. Prencipe, Z. Y. Wang, M. Maggiora, Lei Li, G. X. Sun, W. G. Li, M. Wang, S. X. Du, Guo-Ming Chen, Z. L. Hou, Y. B. Liu, Z. P. Zhang, B. D. Schaefer, Y. Ban, S. G. Wang, J. Schulze, M. Y. Dong, X. L. Ji, S. P. Yu, S. P. Wen, Y. F. Liang, Y. Z. Sun, Q. A. Malik, S. H. Zhu, J. M. Bian, Z. H. An, B. Spruck, Z. Xue, T. Ma, Q. Ji, C. X. Yu, Y. Ding, Haosheng Chen, Talib Hussain, P. L. Wang, G. F. Xu, S. Qian, J. F. Sun, M. R. Shepherd, F. Feldbauer, Hai Liang, P. L. Liu, Feng Xue, Cui Li, Hua-Bin Li, M. Qi, J. K. Becker, Y. Xu, N. B. Li, Q. J. Li, Q Zhao, H. M. Liu, M. Pelizaeus, H. Ye, G. S. Varner, Y. Zhang, Yulei Han, Yuehong Xie, Xing Lu, Wei Wu, F. E. Maas, J. Zhong, H. P. Cheng, X. Q. Li, Kunlun He, Kai Liu, Yang Gao, Ka-Yuet Liu, N. Wu, Y. Q. Wang, Zhibing Li, M. Ablikim, C. L. Luo, A. A. Zafar, W. B. Yan, L. L. Jiang, X. L. Luo, Fang Liu, Lei Zhou, X. K. Zhou, Xueyong Shen, Zujian Wang, Y. S. Zhang, H. S. Zhao, Zhi-Jun Sun, X. P. Xu, T. Held, H. J. Lu, D. M. Li, B. Y. Zhang, Y. H. Zheng, I. B. Nikolaev, F. F. Jing, M. N. Achasov, J. X. Zuo, Z. G. Wang, H. Y. Zhang, Guangyu Zhao, R. E. Mitchell, J. Y. Zhang, J. P. Dai, J. Min, Chunyan Zhu, D. Dedovich, Shaodan Ma, Shouguang Jin, Yi-Fang Zhao, Y. P. Huang, W. Gradl, W. Lai, Y. K. Heng, J. W. Zhang, X. Q. Hao, Tao Hu, B. Huang, Zhiyong Zhang, L. S. Wang, N. Kalantar-Nayestanaki, M. H. Ye, K. H. Rashid, X. Liu, C. Morales Morales, H. Y. Sheng, S. Spataro, M. Greco, U. Wiedner, Y. P. Lu, G. R. Liao, D. Toth, S. J. Zhao, L. L. Wang, X. Y. Zhang, M. L. Chen, R. G. Ping, S. S. Sun, X. B. Ji, K. Goetzen, Z. P. Mao, X. H. Zhao, W. M. Ding, J. Fang, J. F. Chang, G. F. Cao, G. Rong, Z. A. Liu, Y. M. Zhu, X. R. Zhou, J. L. Fu, Cheng Li, Z. J. Xiao, B. Zheng, Y. J. Sun, Wei Li, Qun-Yao Wang, K. Peters, A. Zallo, L. G. Xia, Y. S. Zhu, J. F. Qiu, Z. Wu, H. L. Tian, C. J. Tang, K. X. Zhao, Y. F. Wang, F. A. Harris, X. Y. Ma, Chunmei Zhang, and C. H. Li
Subjects: Physics, Branching fraction, Electron–positron annihilation, Excited state, Analytical chemistry, General Physics and Astronomy
Abstract: Using a sample of 106×10(6) ψ(3686) events collected with the BESIII detector at the BEPCII storage ring, we have made the first measurement of the M1 transition between the radially excited charmonium S-wave spin-triplet and the radially excited S-wave spin-singlet states: ψ(3686)→γη(c)(2S). Analyses of the processes ψ(3686)→γη(c)(2S) with η(c)(2S)→K(S)(0)K(±)π(∓) and K(+)K(-)π(0) give an η(c)(2S) signal with a statistical significance of greater than 10 standard deviations under a wide range of assumptions about the signal and background properties. The data are used to obtain measurements of the η(c)(2S) mass (M(η(c)(2S))=3637.6±2.9(stat)±1.6(syst) MeV/c(2)), width (Γ(η(c)(2S))=16.9±6.4(stat)±4.8(syst) MeV), and the product branching-fraction (B(ψ(3686)→γη(c)(2S))×B(η(c)(2S)→KKπ)=(1.30±0.20(stat)±0.30(syst))×10(-5)). Combining our result with a BABAR measurement of B(η(c)(2S)→KKπ), we find the branching fraction of the M1 transition to be B(ψ(3686)→γη(c)(2S))=(6.8±1.1(stat)±4.5(syst))×10(-4).
Published: 2012

102. Observation of two new N* resonances in the decay ψ(3686)→ppπ0

Author: M, Ablikim, M N, Achasov, D J, Ambrose, F F, An, Q, An, Z H, An, J Z, Bai, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, E, Boger, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, A, Calcaterra, G F, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, A, Denig, I, Denysenko, M, Destefanis, W M, Ding, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, J, Fang, S S, Fang, L, Fava, F, Feldbauer, C Q, Feng, R B, Ferroli, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, W, Gradl, M, Greco, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, Y L, Han, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, T, Held, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, N, Kalantar-Nayestanaki, M, Kavatsyuk, W, Kühn, W, Lai, J S, Lange, J K C, Leung, C H, Li, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, K, Li, Lei, Li, N B, Li, Q J, Li, S L, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, H, Liu, H B, Liu, H H, Liu, H M, Liu, H W, Liu, J P, Liu, K Y, Liu, Kai, Liu, Kun, Liu, P L, Liu, S B, Liu, X, Liu, X H, Liu, Y, Liu, Y B, Liu, Z A, Liu, Zhiqiang, Liu, Zhiqing, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, M, Lv, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, S, Ma, T, Ma, X Y, Ma, Y, Ma, F E, Maas, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, T J, Min, R E, Mitchell, X H, Mo, C, Morales Morales, C, Motzko, N Yu, Muchnoi, Y, Nefedov, C, Nicholson, I B, Nikolaev, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, J W, Park, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, E, Prencipe, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, Y, Qin, Z H, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, E H, Thorndike, H L, Tian, D, Toth, M, Ullrich, G S, Varner, B, Wang, B Q, Wang, J X, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, Q J, Wang, S G, Wang, X F, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, P, Weidenkaff, Q G, Wen, S P, Wen, M, Werner, U, Wiedner, L H, Wu, N, Wu, S X, Wu, W, Wu, Z, Wu, L G, Xia, Z J, Xiao, Y G, Xie, Q L, Xiu, G F, Xu, G M, Xu, H, Xu, Q J, Xu, X P, Xu, Y, Xu, Z R, Xu, F, Xue, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, T, Yang, Y, Yang, Y X, Yang, H, Ye, M, Ye, M H, Ye, B X, Yu, C X, Yu, J S, Yu, S P, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J G, Zhang, J Q, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Y S, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, J W, Zhao, K X, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y M, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, and J X, Zuo
Abstract: Based on 106×10(6)ψ(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of ψ(3686)→ppπ0 is performed. The branching fraction of this channel has been determined to be B(ψ(3686)→ppπ0)=(1.65±0.03±0.15)×10(-4). In this decay, 7 N* intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2+ resonance with a mass of 2300(-30-0)(+40+109) MeV/c2 and width of 340(-30-58)(+30+110) MeV/c2, and one 5/2- resonance with a mass of 2570(-10-10)(+19+34) MeV/c2 and width of 250(-24-21)(+14+69) MeV/c2. For the remaining 5 N* intermediate resonances [N(1440), N(1520), N(1535), N(1650) and N(1720)], the analysis yields mass and width values that are consistent with those from established resonances.
Published: 2012

103. Two-photon widths of theχc0,2states and helicity analysis forχc2→γγ

Author: M. Maggiora, Ling Zhao, Tao Luo, Y. F. Wang, C. Nicholson, Z. Y. He, Z. L. Hou, Yang Yang, B. X. Yu, H. B. Li, X. Y. Ma, M. Ullrich, W. X. Gong, A. G. Denig, C. L. Luo, Zhiqing Liu, Yuanbo Chen, X. L. Luo, G. M. Xu, C. Z. Yuan, C. C. Zhang, H. J. Lu, J. G. Lu, B. Zhong, L. B. Guo, H. S. Chen, J. F. Chang, Lei Li, Y. Ding, Shujun Zhao, K. Goetzen, W. Kuehn, H. L. Dai, Igor Boyko, Shan Wang, F. E. Maas, Ulrich Wiedner, C. H. Li, G. F. Xu, T. Ma, Yanping Huang, S. Jin, W. B. Yan, S. Ma, G. R. Lu, X. Cai, X. R. Li, X. Y. Song, J. M. Bian, Zhenyu Zhang, W. Lai, D. Toth, T. Hu, M. Qi, Z. A. Zhu, Sanfeng Wu, G. S. Varner, Hang Liu, P. Wang, M. N. Achasov, E. H. Thorndike, X. L. Wang, B. Wang, X. T. Liao, Michael Werner, J. S. Huang, C. X. Liu, Xiangdong Ruan, S. Pacetti, D. H. Sun, H. L. Tian, F. Li, X. H. Liu, Lei Zhao, Guangming Huang, Z. Ning, Q. J. Xu, A. Calcaterra, Z. G. Zhao, L. S. Wang, C. S. Ji, F. C. Ma, J. C. Chen, M. L. Chen, Brent J. Liu, M. Z. Wang, J. P. Dai, X. Q. Li, Z. Wu, Z. J. Sun, M. Greco, L. G. Xia, H. Loehner, Yu-Bin Liu, H. Liang, Y. Nefedov, X. L. Ji, X. N. Li, L. Zhang, H. H. Liu, C. L. Ma, Y. X. Yang, J. C. Li, Kun Liu, Ke Wang, J. K. C. Leung, X. K. Zhou, T. Yang, J. Zhuang, Nasser Kalantar-Nayestanaki, C. Morales Morales, M. Pelizaeus, X. Sun, H. H. Zhang, M. X. Luo, Rinaldo Baldini Ferroli, J. F. Qiu, D. V. Dedovich, Q. P. Ji, N. B. Li, R. Poling, V. V. Bytev, H. X. Yang, H.S. Xu, M. R. Shepherd, S. H. Zhang, X. Y. Shen, Fenfen An, X. Q. Hao, X. Tang, J. F. Sun, Zhenli Xu, Q. Zhao, S. P. Yu, G. A. Chelkov, Talib Hussain, Y. Z. Sun, Chun S. J. Pun, S. B. Liu, C. Motzko, T. C. Zhao, K. Y. Liu, K. X. Zhao, C. Geng, Y. Zeng, M. Y. Dong, L. L. Jiang, Zhe Sun, Y. G. Xie, Y. F. Liang, D. P. Jin, S. J. Chen, Gang Zhao, J. Min, H. B. Liu, G. X. Sun, Li Yan, Julian Schulze, S. X. Du, F. A. Harris, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, O. Bondarenko, X. F. Wang, Xiao-Tong Lu, Joong-Won Park, M. G. Zhao, J. P. Liu, L. Fava, J. Q. Zhang, Y. M. Zhu, Z. Jiao, Fu-Hu Liu, D. H. Zhang, S. L. Olsen, R. A. Briere, P. L. Liu, J. H. Zou, X. S. Jiang, N. Wu, Krisztian Peters, Y. H. Zheng, H. L. Ma, Xiaobo Zhu, Cong-Feng Qiao, D. M. Li, Q. M. Ma, L. K. Jia, K. L. He, Z. G. Wang, H. Y. Zhang, N. Yu. Muchnoi, Yin Xu, P. L. Wang, Qi-Wen Lü, S. S. Sun, J. G. Messchendorp, Q. L. Xiu, B. Q. Wang, Heng-Yun Ye, C. P. Shen, J. X. Zuo, L. H. Wu, Shou-hua Zhu, Y. Yuan, Y. S. Zhu, Y. H. Zhang, G. F. Chen, J. Z. Bai, J. Y. Zhang, Q. G. Wen, Y. J. Mao, Y.N. Gao, Z. Y. Wang, M. Bertani, Jürgen Becker, B. S. Zou, G. R. Liao, R. E. Mitchell, Y. K. Heng, Zhiqiang Liu, Miao He, Zujian Wang, A. Q. Guo, Y. P. Chu, L. P. Zhou, K. Li, Y. M. Ma, Y. S. Zhang, Fang Liu, X. B. Ji, W. Gradl, Z. P. Mao, F. F. Jing, H. P. Cheng, J. Fang, I. Denysenko, B. Y. Zhang, Y. Zhang, Q. An, Z. H. Qin, B. Spruck, X. H. Zhao, Wei Wu, A. Zhemchugov, Chuan Liu, W. L. Yuan, Q. Ouyang, W. G. Li, S. Spataro, Y. Q. Wang, X. P. Xu, C. Zhu, H. M. Liu, J. F. Hu, S. S. Fang, G. F. Cao, G. Li, Y. B. Zhao, X. T. Huang, M. Ablikim, K. J. Zhu, Y. B. Liu, Xuantong Zhang, C. D. Fu, A. A. Zafar, G. Rong, C. Q. Feng, Z. Y. Deng, Xingguo Li, C. J. Tang, Y. P. Lu, Q. A. Malik, Kai Liu, Jie Yu, Z. P. Zheng, T. J. Min, F. Feldbauer, Feng Liu, Chang Liu, T. R. Zhang, Y. L. Han, Y. T. Liang, HongSheng Zhao, Q. J. Wang, Jianping Zheng, M. Lv, J. G. Zhang, Z. Xue, Z. B. Li, M. Destefanis, J. Zhang, M. Kavatsyuk, B. X. Zhang, H. Mao, J. B. Jiao, J. Zhong, Yao Wang, Zhiyong Zhang, X. Liu, Z. J. Xiao, Y. P. Guo, S. Qian, Jialun Ping, L. L. Wang, X. Y. Zhang, Y. J. Sun, E. Boger, D. J. Ambrose, M. H. Gu, H. Y. Sheng, C. X. Yu, B. Zheng, R. G. Ping, E. Prencipe, Qun-Yao Wang, W. D. Li, Feng Xue, Cui Li, Z. A. Liu, Y. Ban, P. Weidenkaff, S. L. Li, Y. H. Yan, J. W. Zhao, D. Cronin-Hennessy, S. P. Wen, X. S. Qin, T. Held, X. R. Zhou, J. L. Fu, Cheng Li, I. B. Nikolaev, K. H. Rashid, M. Shao, Y. T. Gu, Q. J. Li, Z. H. An, A. Sarantsev, D. H. Wei, J. S. Lange, B. Huang, X. H. Mo, M. H. Ye, L. Y. Dong, H. M. Hu, W. M. Ding, Nicolas Berger, J. W. Zhang, A. Zallo, Yang Qin, and Y. H. Guan
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Annihilation, Electron–positron annihilation, Lambda, Width ratio, Helicity, Event generator, Gamma gamma
Abstract: Based on a data sample of 106 X 10(6) psi' events collected with the BESIII detector, the decays psi' -> gamma chi(c0,2), chi(c0,2) -> gamma gamma are studied to determine the two-photon widths of the chi(c0,2) states. The two-photon decay branching fractions are determined to be B(chi(c0) -> gamma gamma) = (2.24 +/- 0.19 +/- 0.12 +/- 0.08) X 10(-4) and B(chi(c2) -> gamma gamma) = (3.21 +/- 0.18 +/- 0.17 +/- 0.13) X 10(-4) From these, the two-photon widths are determined to be Gamma(gamma gamma)(chi(c0)) = (2.33 +/- 0.20 +/- 0.13 +/- 0.17) keV, Gamma(gamma gamma)(chi(c2)) = (0.63 +/- 0.04 +/- 0.04 +/- 0.04) keV, and R = Gamma(gamma gamma)(chi(c2))/Gamma(gamma gamma)(chi(c0)) = 0.271 +/- 0.029 +/- 0.013 +/- 0.027, where the uncertainties are statistical, systematic, and those from the PDG B(psi' -> gamma chi(c0,2)) and Gamma(chi(c0,2)) errors, respectively. The ratio of the two-photon widths for helicity lambda = 0 and helicity lambda = 2 components in the decay chi -> gamma gamma is measured for the first time to be f(0/2) = Gamma(lambda=0)(gamma gamma)(chi(c2))/Gamma(lambda=2)(gamma gamma)(chi(c2)) = 0.00 +/- 0.02 +/- 0.02.
Published: 2012

104. Measurements of the Mass and Width of theηcUsing the Decayψ(3686)→γηc

Author: P. L. Wang, X. L. Luo, HongSheng Zhao, Q. J. Wang, R. Poling, A. Calcaterra, C. S. Ji, X. L. Ji, Jianping Zheng, H. Liang, T. Yang, M. Lv, S. P. Yu, G. A. Chelkov, Z. Xue, Talib Hussain, Zong-Ping Zheng, M. Destefanis, Xiaobo Zhu, Xiangdong Ruan, J. Z. Bai, Meng Wang, N. Yu. Muchnoi, Qi-Wen Lü, Heng-Yun Ye, W. G. Li, S. X. Du, Y. H. Zhang, Kaihui Liu, Y. P. Guo, J. K. C. Leung, G. R. Liao, Z. A. Liu, D. Alberto, Q. A. Malik, K. J. Zhu, Xuantong Zhang, Q. G. Wen, M. H. Ye, Y. P. Chu, X. B. Ji, C. F. Qiao, F. F. Jing, Zhiqiang Liu, Miao He, Zhiyong Zhang, X. Liu, S. Spataro, X. P. Xu, C. Zhu, Z. Y. Wang, Ke Wang, M. Pelizaeus, Y. Ban, L. P. Zhou, W. L. Yuan, Q. Ouyang, Z. J. Xiao, X. Sun, J. M. Bian, E. H. Thorndike, L. Y. Dong, Z. P. Mao, Zhenyu Zhang, W. Lai, M. Y. Dong, Shan Wang, M. Bertani, Q. P. Ji, S. J. Zhao, H. P. Cheng, J. Fang, J. F. Hu, F. Li, F. C. Ma, X. H. Liu, Y. H. Guan, S. P. Wen, Y. B. Liu, X. S. Qin, V. V. Bytev, G. S. Varner, X. Q. Hao, Xiujuan Tang, G. F. Cao, S. Qian, Jialun Ping, Fenfen An, J. C. Chen, Hang Liu, S. H. Zhang, X. L. Li, N. B. Li, X. R. Zhou, J. L. Fu, J. P. Dai, Nasser Kalantar-Nayestanaki, M. Maggiora, M. L. Chen, Ling Zhao, T. C. Zhao, Cheng Li, C. L. Ma, I. B. Nikolaev, Y. Ding, J. F. Qiu, E. Boger, K. H. Rashid, H. X. Yang, M. Shao, Y. T. Gu, Shou-hua Zhu, Lei Zhao, Z. Y. He, Z. L. Hou, J. H. Zou, Tao Luo, G. R. Lu, J. S. Huang, T. J. Min, Chun S. J. Pun, Q. J. Li, J. B. Jiao, Yang Yang, J. Zhong, D. J. Ambrose, Z. H. An, Xian Lun Zhu, B. X. Yu, Y. Nefedov, Y. T. Liang, C. Geng, B. S. Zou, Q. L. Xiu, M. G. Zhao, Y. P. Lu, X. F. Wang, Huihui Liu, S. S. Sun, J. P. Liu, A. Sarantsev, D. H. Wei, Z. A. Zhu, J. S. Lange, Jiangchao Li, M. H. Gu, H. S. Chen, Z. G. Wang, H. Y. Sheng, J. G. Messchendorp, H. Y. Zhang, G. X. Sun, Li Yan, Huirun Chen, J. X. Zuo, Julian Schulze, Yi-Fang Zhao, D. H. Sun, Jürgen Becker, Xing Lu, Yong Liu, G. F. Chen, H. L. Dai, Igor Boyko, Joong-Won Park, J. F. Sun, Q. M. Ma, J. Y. Zhang, J. Min, G. M. Xu, Z. Jiao, Fu-Hu Liu, Z. B. Li, C. X. Yu, A. Q. Guo, R. E. Mitchell, X. T. Liao, H. Xu, C. Z. Yuan, J. Zhuang, Y. K. Heng, Y. Yuan, B. Huang, X. H. Mo, L. S. Wang, D. H. Zhang, H. M. Liu, G. Li, H. M. Hu, Sai-Juan Chen, Nicolas Berger, Q. J. Xu, W. B. Yan, B. Zheng, R. G. Ping, M. N. Achasov, J. W. Zhang, M. Qi, H. L. Tian, C. D. Fu, Zhihao Xu, C. Q. Feng, W. D. Li, Chuan Liu, L. L. Wang, Z. Y. Deng, X. N. Li, S. Pacetti, L. L. Jiang, A. Zallo, Y. J. Sun, Yang Gao, Y. S. Zhu, Cui Li, K. Li, S. B. Liu, Fang Liu, J. Zhang, M. Kavatsyuk, Q. Liu, Qun-Yao Wang, H. B. Liu, Xueyong Shen, H. Mao, B. Y. Zhang, Zujian Wang, Y. S. Zhang, Zhi-Jun Sun, Y. H. Zheng, D. Cronin-Hennessy, B. Spruck, X. H. Zhao, H. J. Lu, J. G. Lu, Yin Xu, H. L. Ma, D. M. Li, Yulei Han, C. J. Tang, Kunlun He, L. H. Wu, B. X. Zhang, G. F. Xu, T. Hu, S. Jin, B. Wang, Y. X. Yang, Feng Liu, Chang Liu, Guangming Huang, M. R. Shepherd, T. R. Zhang, Z. Wu, Xie-Yan Song, N. Wu, Q. Zhao, Krisztian Peters, Y. Z. Sun, Y. H. Yan, Z. G. Zhao, K. Goetzen, W. Kuehn, W. L. Ding, H. Loehner, L. Zhang, H. H. Liu, B. Q. Wang, Gang Zhao, Shisong Fang, H. H. Zhang, Y. J. Mao, C. P. Shen, Yao Wang, M. X. Luo, D. V. Dedovich, O. Bondarenko, Y. Zhang, J. Q. Zhang, Brent J. Liu, Q. An, Yuehong Xie, Wei Wu, A. Zhemchugov, H. B. Li, C. L. Luo, Yuanbo Chen, S. Ma, D. Toth, C. C. Zhang, B. Zhong, L. B. Guo, Y. Zeng, Zhe Sun, Lei Li, Ulrich Wiedner, T. Ma, Yanping Huang, Y. B. Chen, J. Z. Zhang, X. Q. Li, Y. Q. Wang, C. X. Liu, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, Z. Ning, S. L. Li, R. B. Ferroli, Xiao-Yang Zhang, X. K. Zhou, Zhiqing Liu, J. F. Chang, X. L. Wang, X. Cai, X. R. Li, I. Denysenko, Y. F. Wang, Jingwei Zhao, Y. F. Liang, D. P. Jin, X. Y. Ma, W. X. Gong, F. A. Harris, C. H. Li, S. L. Olsen, R. A. Briere, X. S. Jiang, L. K. Jia, M. Greco, and K. Y. Liu
Subjects: Physics, Meson, Detector, Radiative transfer, General Physics and Astronomy, Singlet state, State (functional analysis), Atomic physics, Measure (mathematics), Storage ring, Line (formation)
Abstract: The mass and width of the lowest-lying S-wave spin singlet charmonium state, the η(c), are measured using a data sample of 1.06×10(8) ψ(3686) decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference between the signal reaction, ψ(3686)→γη(c), and a nonresonant radiative background to describe the line shape of the η(c) successfully. We measure the η(c) mass to be 2984.3±0.6±0.6 MeV/c(2) and the total width to be 32.0±1.2±1.0 MeV, where the first errors are statistical and the second are systematic.
Published: 2012

105. Search for a light exotic particle inJ/ψradiative decays

Author: P. L. Wang, Z. A. Liu, X. L. Luo, J. Y. Zhang, J. Min, Z. Jiao, X. L. Wang, D. Dedovich, Z. Ning, X. K. Zhou, S. L. Li, R. B. Ferroli, Y. P. Guo, J. K. C. Leung, J. H. Zou, D. P. Jin, Y. S. Zhang, G. X. Sun, W. G. Li, X. T. Liao, J. B. Jiao, Y. P. Chu, Shouguang Jin, X. R. Zhou, Junguang Lu, C. F. Qiao, J. L. Fu, H. S. Zhao, Cheng Li, Y. P. Huang, H. Xu, X. H. Mo, B. Wang, Z. Y. Deng, Michael Werner, G. M. Huang, Q. J. Wang, J. P. Liu, X. Cai, T. Held, H. J. Lu, Yi-Fang Zhao, F. C. Ma, J. C. Chen, Q. J. Li, Zhiqing Liu, H. M. Liu, X. Q. Hao, Y. J. Sun, Y. Xu, N. B. Li, Y. X. Yang, H. P. Cheng, G. S. Varner, Q Zhao, S. Spataro, Y. J. Mao, F. F. An, Y. H. Guan, A. Q. Guo, B. Huang, X. H. Liu, S. H. Zhang, A. Zhemchugov, Y. Q. Wang, Wei Li, H. Ye, Jianping Zheng, L. S. Wang, N. Kalantar-Nayestanaki, X. N. Li, M. H. Ye, Jie Yu, K. H. Rashid, Hang Liu, H. Y. Sheng, X. S. Qin, Guo-Ming Chen, M. Ablikim, A. A. Zafar, D. H. Zhang, Fang Liu, X. Liu, J. F. Hu, Xing Lu, W. L. Yuan, M. Lv, H. H. Zhang, Lei Zhou, J. Zhong, Z. L. Hou, K. J. Zhu, M. Greco, K. Y. Liu, K. Li, U. Wiedner, Chun S. J. Pun, Y. P. Lu, G. R. Liao, Qun-Yao Wang, Z. A. Zhu, Chang-Zheng Yuan, C. L. Ma, Ling Zhao, X. D. Ruan, Zhibing Li, D. Toth, M. Pelizaeus, M. G. Zhao, E. H. Thorndike, Yao Wang, W. Gradl, X. F. Wang, Huihui Liu, R. E. Mitchell, Xie-Yan Song, X. P. Xu, Zhenyu Zhang, W. Lai, Z. J. Xiao, D. M. Li, S. G. Wang, B. Y. Zhang, C. L. Luo, L. Zhang, J. Q. Zhang, Lei Zhao, Z. Y. He, J. P. Dai, H. M. Hu, Q. J. Xu, Q. Ouyang, Yuanbo Chen, Tao Hu, Y. H. Zheng, C. X. Yu, I. B. Nikolaev, Sai-Juan Chen, Chunyan Zhu, S. J. Zhao, Yang Yang, J. G. Messchendorp, A. Sarantsev, S. B. Liu, J. S. Lange, J. S. Huang, Y. Z. Sun, S. P. Wen, Y. F. Liang, Jingwei Zhao, K. Peters, D. H. Wei, D. H. Sun, L. B. Guo, Lei Li, Z. P. Zheng, M. Bertani, J. F. Sun, Z. Xue, Q. L. Xiu, H. Loehner, Shaodan Ma, Tao Luo, B. Zhong, Z. P. Zhang, T. Ma, A. Zallo, Y. Nefedov, J. Zhuang, Y. B. Liu, X. D. Sun, L. H. Wu, O. Bondarenko, H. X. Yang, L. Fava, M. X. Luo, E. Prencipe, Xian Lun Zhu, C. D. Fu, Y. Yuan, Qingming Ma, H. H. Liu, J. C. Li, Shisong Fang, L. G. Xia, Y. S. Zhu, J. F. Qiu, Q. Ji, Chang Liu, X. L. Ji, Feng Liu, L. L. Wang, B. X. Zhang, Xuantong Zhang, X. Y. Zhang, M. Wang, H. L. Dai, A. Calcaterra, L. Y. Dong, B. Zheng, S. H. Zhu, M. L. Chen, S. X. Du, X. B. Ji, G. M. Xu, Niklaus Berger, N. Wu, T. R. Zhang, H. S. Chen, K. Goetzen, M. H. Gu, S. P. Yu, Y. Ban, Hua-Bin Li, Q. A. Malik, Zhihao Xu, Chuan Liu, Yong Liu, J. Schulze, F. F. Jing, G. Li, G. Chelkov, Zhiqiang Liu, Miao He, J. M. Bian, C. Geng, X. L. Li, Y. T. Liang, M. R. Shepherd, Feng Xue, Cui Li, W. M. Ding, G. F. Xu, T. C. Zhao, Y. Ding, Q. An, R. G. Ping, C. Morales, M. N. Achasov, J. X. Zuo, J. L. Ping, R. Poling, Talib Hussain, S. Qian, S. S. Sun, Y. Zhang, Yuehong Xie, J. Zhang, Wei Wu, M. Kavatsyuk, Xiang Li, Y. H. Yan, W. Kuehn, T. J. Min, S. X. Wu, Z. P. Mao, X. H. Zhao, Xiaobo Zhu, Z. H. Qin, Xiujuan Tang, N. Yu. Muchnoi, G. Rong, H. L. Ma, M. Shao, Y. H. Zhang, Q. W. Lu, C. S. Ji, Xingtao Huang, Q. G. Wen, Z. G. Zhao, T. Yang, Z. Y. Wang, M. Maggiora, A. Denig, X. R. Li, V. Bytev, Y. Qin, I. Denysenko, E. Boger, S. Pacetti, C. X. Liu, B. X. Yu, M. U. Ulrich, Y. M. Zhu, Guangyu Zhao, Y. K. Heng, J. W. Zhang, J. Fang, J. F. Chang, G. F. Cao, X. S. Jiang, H. B. Liu, B. S. Zou, H. Mao, P. Weidenkaff, Daniel P Cronin-Hennessy, Z. H. An, B. Spruck, F. Feldbauer, M. Qi, J. K. Becker, Yang Gao, Z. Wu, D. J. Ambrose, H. L. Tian, C. J. Tang, C. Motzko, S. L. Olsen, G. R. Lu, K. X. Zhao, Joong-Won Park, W. B. Yan, L. L. Jiang, Y. F. Wang, F. A. Harris, X. Y. Ma, Chunmei Zhang, Xueyong Shen, Zujian Wang, Zhi-Jun Sun, C. H. Li, J. Z. Bai, Y. T. Gu, R. A. Briere, Li Yan, L. K. Jia, Fu-Hu Liu, M. Y. Dong, Feng Li, Hai Liang, Yulei Han, Kunlun He, I. Boyko, Y. Zeng, Brent J. Liu, M. Destefanis, W. X. Gong, C. Q. Feng, B. Q. Wang, Y. Ma, C. P. Shen, Zhe Sun, Y. B. Chen, J. Z. Zhang, K. Wang, F. E. Maas, Z. G. Wang, H. Y. Zhang, and KVI - Center for Advanced Radiation Technology
Subjects: BOSONS, Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), ENERGIES, Electron–positron annihilation, GRAVITINO, FOS: Physical sciences, Supersymmetry, High Energy Physics - Experiment, law.invention, Nuclear physics, Pseudoscalar, High Energy Physics - Experiment (hep-ex), law, Sgoldstino, Radiative transfer, High Energy Physics::Experiment, Collider, Boson
Abstract: Using a data sample containing 1.06x10^8 psi' events collected with the BESIII detector at the BEPCII electron-positron collider, we search for a light exotic particle X in the process psi' -> pi^+ pi^- J/psi, J/psi -> gamma X, X -> mu^+ mu^-. This light particle X could be a Higgs-like boson A^0, a spin-1 U boson, or a pseudoscalar sgoldstino particle. In this analysis, we find no evidence for any mu^+mu^- mass peak between the mass threshold and 3.0 GeV/c^2. We set 90%-confidence-level upper limits on the product-branching fractions for J/psi -> gamma A^0, A^0 -> mu^+ mu^- which range from 4x10^{-7} to 2.1x10^{-5}, depending on the mass of A^0, for M(A^0), 7 pages, 3 figures, submitted to Physical Review D
Published: 2012

106. First Observation ofη(1405)Decays intof0(980)π0

Author: C. S. Ji, H. Liang, T. Yang, X. D. Ruan, M. Y. Dong, J. H. Zou, N. B. Li, M. Qi, H. L. Tian, S. S. Sun, Xiao-Tong Lu, J. M. Bian, Yin Xu, L. Y. Dong, L. H. Wu, Jürgen Becker, Z. Ning, X. L. Ji, S. P. Yu, G. A. Chelkov, J. B. Jiao, S. J. Zhao, W. Lai, R. E. Mitchell, Shan Wang, Talib Hussain, G. S. Varner, Hang Liu, Y. G. Xie, Y. F. Wang, H. L. Ma, M. H. Gu, S. X. Du, J. Zhong, Q. J. Xu, J. C. Chen, Q. L. Xiu, J. Z. Bai, H. Y. Sheng, D. M. Li, Y. H. Zheng, X. Wan, C. X. Yu, X. Y. Ma, W. X. Gong, Xiaobo Zhu, Cong-Feng Qiao, Zhiqiang Liu, Miao He, N. Yu. Muchnoi, Nasser Kalantar-Nayestanaki, B. Zheng, R. G. Ping, L. P. Zhou, Heng-Yun Ye, Y. H. Zhang, G. R. Liao, Q. G. Wen, C. H. Li, I. B. Nikolaev, K. H. Rashid, M. Bertani, Zhiqing Liu, Z. A. Liu, Z. P. Mao, H. J. Lu, M. Shao, Y. T. Gu, W. B. Yan, Y. X. Yang, Y. P. Chu, X. B. Ji, H. P. Cheng, J. Fang, S. B. Liu, Y. Nefedov, F. F. Jing, Z. Y. Wang, J. G. Lu, F. Li, M. N. Achasov, W. L. Yuan, B. Spruck, E. H. Thorndike, Y. Ban, J. F. Chang, S. Qian, Q. An, Jialun Ping, Q. Ouyang, Q. J. Li, Q. P. Ji, Y. T. Liang, S. P. Wen, X. H. Liu, S. S. Fang, X. Q. Li, X. Tang, Q. M. Ma, M. R. Shepherd, S. Pacetti, Y. B. Zhao, N. Wu, Krisztian Peters, Y. B. Liu, L. L. Wang, X. Y. Zhang, X. S. Qin, X. R. Zhou, J. P. Dai, A. Zallo, F. C. Ma, J. L. Fu, X. Cai, P. L. Wang, Z. H. An, M. G. Zhao, Y. Q. Wang, S. H. Zhang, M. Greco, X. Y. Shen, A. Sarantsev, Cheng Li, Shou-hua Zhu, M. Maggiora, Ling Zhao, C. L. Ma, X. R. Li, A. Zhemchugov, X. T. Huang, Q. Zhao, X. L. Luo, D. H. Wei, Y. Z. Sun, J. S. Lange, Lei Zhao, Z. Y. He, Z. L. Hou, Y. Yuan, Y. J. Sun, E. Boger, Y. S. Zhu, Y. Ding, A. A. Zafar, Z. G. Wang, H. Y. Zhang, K. Y. Liu, Z. B. Li, G. Rong, Yang Yang, Y. H. Guan, C. Geng, J. X. Zuo, G. F. Chen, J. F. Qiu, K. Li, T. Hu, G. R. Lu, J. Zhang, Fang Liu, J. Min, B. S. Zou, Z. A. Zhu, H. B. Liu, S. L. Olsen, R. A. Briere, J. Y. Zhang, X. S. Jiang, B. Huang, G. M. Xu, I. Denysenko, X. H. Mo, L. S. Wang, M. Kavatsyuk, C. J. Tang, D. H. Sun, Gang Zhao, T. J. Min, K. J. Zhu, L. K. Jia, Y. K. Heng, M. H. Ye, C. Z. Yuan, K. L. He, L. L. Jiang, Q. Liu, Qun-Yao Wang, Zhiyong Zhang, B. Wang, B. Y. Zhang, X. Liu, Xuantong Zhang, Y. P. Lu, M. Z. Wang, Y. P. Guo, S. J. Chen, B. X. Zhang, Q. A. Malik, F. A. Harris, Guangming Huang, G. Li, O. Bondarenko, Y. N. Gao, Y. Zhang, Z. Wu, C. D. Fu, C. Q. Feng, Z. P. Zheng, Wei Wu, Z. Y. Deng, Xingguo Li, B. Q. Wang, Y. L. Han, X. K. Zhou, HongSheng Zhao, Q. J. Wang, J. K. C. Leung, Jianping Zheng, M. Lv, Z. Xue, M. Destefanis, C. P. Shen, Feng Liu, Chang Liu, J. Q. Zhang, Z. P. Zhang, M. Ablikim, T. R. Zhang, S. L. Li, Y. H. Yan, H. M. Hu, Zujian Wang, D. Cronin-Hennessy, H. Mao, Nicolas Berger, J. W. Zhang, Y. S. Zhang, Yao Wang, X. Q. Hao, X. H. Zhao, Brent J. Liu, D. J. Ambrose, J. F. Sun, Y. Zeng, Zhe Sun, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, G. X. Sun, Li Yan, W. D. Li, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Cui Li, Jingwei Zhao, Y. F. Liang, D. P. Jin, H. B. Li, C. L. Luo, Y. J. Mao, Z. J. Xiao, H. X. Yang, H.S. Xu, Yuanbo Chen, Chun S. J. Pun, C. C. Zhang, B. Zhong, L. B. Guo, X. L. Wang, X. F. Wang, Huihui Liu, J. P. Liu, M. L. Chen, Lei Li, W. L. Ding Ding, J. G. Messchendorp, Ulrich Wiedner, A. Q. Guo, T. Ma, Yanping Huang, H. H. Liu, J. C. Li, J. Zhuang, M. X. Luo, D. V. Dedovich, Chuan Liu, W. G. Li, S. Spataro, X. P. Xu, C. Zhu, Zhenli Xu, K. Goetzen, W. Kuehn, H. M. Liu, J. F. Hu, G. F. Cao, A. Calcaterra, Z. G. Zhao, Tao Luo, H. H. Zhang, Z. J. Sun, B. X. Yu, H. Loehner, L. Zhang, S. Ma, D. Toth, H. S. Chen, J. S. Huang, Yong Liu, H. L. Dai, Igor Boyko, C. X. Liu, Ke Wang, G. F. Xu, M. Pelizaeus, S. Jin, X. Sun, R. Poling, V. V. Bytev, Julian Schulze, Joong-Won Park, X. Y. Song, Fenfen An, T. C. Zhao, Qi-Wen Lü, X. T. Liao, D. Alberto, R. Baldini Ferroli, and X. N. Li
Subjects: Nuclear physics, Physics, Particle physics, Meson, Isospin, Electron–positron annihilation, Mass spectrum, Pi, General Physics and Astronomy, High Energy Physics::Experiment
Abstract: The decays J/psi -> gamma pi(+)pi(-)pi(0) and J/psi ->gamma pi(0)pi(0)pi(0) are analyzed using a sample of 225 X 10(6) J/psi events collected with the BESIII detector. The decay of eta(1405) -> f(0)(980)pi(0) with a large isospin violation is observed for the first time. The width of the f(0)(980) observed in the dipion mass spectra is anomalously narrower than the world average. Decay rates for three-pion decays of the eta' are also measured precisely.
Published: 2012

107. Evidence for the direct two-photon transition from ψ(3686) to J/ψ

Author: M, Ablikim, M N, Achasov, D J, Ambrose, F F, An, Q, An, Z H, An, J Z, Bai, R B, Ferroli, Y, Ban, J, Becker, N, Berger, M B, Bertani, J M, Bian, E, Boger, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, A C, Calcaterra, G F, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, A, Denig, I, Denysenko, M, Destefanis, W M, Ding, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, J, Fang, S S, Fang, L, Fava, F, Feldbauer, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, W, Gradl, M, Greco, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, Y L, Han, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, T, Held, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, N, Kalantar-Nayestanaki, M, Kavatsyuk, W, Kuehn, W, Lai, J S, Lange, J K C, Leung, C H, Li, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, K, Li, Lei, Li, N B, Li, Q J, Li, S L, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, H, Liu, H B, Liu, H H, Liu, H M, Liu, H W, Liu, J P, Liu, Kun, Liu, Kai, Liu, K Y, Liu, P L, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y, Liu, Z A, Liu, Zhiqiang, Liu, Zhiqing, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, M, Lv, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, S, Ma, T, Ma, X Y, Ma, Y, Ma, F E, Maas, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, T J, Min, R E, Mitchell, X H, Mo, C, Morales Morales, C, Motzko, N Yu, Muchnoi, Y, Nefedov, C, Nicholson, I B, Nikolaev, Z, Ning, S L, Olsen, Q, Ouyang, S P, Pacetti, J W, Park, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, E, Prencipe, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, Y, Qin, Z H, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, E H, Thorndike, H L, Tian, D, Toth, M U, Ulrich, G S, Varner, B, Wang, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, Q J, Wang, S G, Wang, X F, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, P, Weidenkaff, Q G, Wen, S P, Wen, M W, Werner, U, Wiedner, L H, Wu, N, Wu, S X, Wu, W, Wu, Z, Wu, L G, Xia, Z J, Xiao, Y G, Xie, Q L, Xiu, G F, Xu, G M, Xu, H, Xu, Q J, Xu, X P, Xu, Y, Xu, Z R, Xu, F, Xue, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, T, Yang, Y, Yang, Y X, Yang, H, Ye, M, Ye, M H, Ye, B X, Yu, C X, Yu, J S, Yu, S P, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A Z, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J G, Zhang, J Q, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Y S, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, J W, Zhao, K X, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y M, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, and J X, Zuo
Subjects: Physics, Particle physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy
Abstract: The two-photon transition ψ(3686)→γγJ/ψ is studied in a sample of 1.06×10(8) ψ(3686) decays collected by the BESIII detector. The branching fraction is measured to be (3.1±0.6(stat)(-1.0)(+0.8)(syst))×10(-4) using J/ψ→e(+)e(-) and J/ψ→μ(+)μ(-) decays, and its upper limit is estimated to be 4.5×10(-4) at the 90% confidence level. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the ψ(3686) decay plane and the J/ψ polarization in this decay are also studied. In addition, the product branching fractions of sequential E1 transitions ψ(3686)→γχ(cJ) and χ(cJ)→γJ/ψ(J=0,1,2) are reported.
Published: 2012

108. Spin-Parity Analysis ofpp¯Mass Threshold Structure inJ/ψandψ(3686)Radiative Decays

Author: N. Wu, Krisztian Peters, M. Bertani, Z. P. Zheng, K. Goetzen, W. Kuehn, Shou-hua Zhu, B. Q. Wang, C. P. Shen, Feng Liu, Chang Liu, O. Bondarenko, Jingwei Zhao, T. R. Zhang, Yin Xu, L. H. Wu, J. K. C. Leung, L. Zhang, B. S. Zou, H. M. Hu, H. L. Ma, D. M. Li, F. Li, Shan Wang, H. Mao, Tao Luo, Nicolas Berger, Z. G. Wang, H. Y. Zhang, Y. F. Liang, D. P. Jin, Y. Q. Wang, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, J. W. Zhang, D. J. Ambrose, P. L. Wang, M. H. Gu, A. Q. Guo, Y. H. Guan, G. F. Xu, J. B. Jiao, J. X. Zuo, G. F. Chen, F. C. Ma, Yao Wang, S. Jin, Y. J. Mao, H. Y. Sheng, Brent J. Liu, M. Qi, J. Z. Bai, X. L. Luo, J. Zhong, X. Q. Hao, H. L. Tian, J. Y. Zhang, G. S. Varner, Y. H. Zheng, Xiaobo Zhu, Cong-Feng Qiao, B. X. Yu, Zujian Wang, Y. S. Zhang, C. X. Yu, X. Y. Song, S. Ma, Hang Liu, B. Huang, H. H. Liu, B. Spruck, B. Zheng, R. G. Ping, Z. Ning, W. D. Li, M. Maggiora, Ling Zhao, Y. T. Liang, Q. A. Malik, X. H. Mo, D. Toth, L. S. Wang, X. H. Zhao, X. K. Zhou, Y. Zhang, H. S. Chen, Q. P. Ji, X. Q. Li, M. Greco, Meng Wang, N. Yu. Muchnoi, Y. K. Heng, Q. An, Y. Nefedov, Z. A. Liu, M. H. Ye, Q. M. Ma, Zhihao Xu, Chuan Liu, Heng-Yun Ye, Yuehong Xie, J. F. Sun, S. H. Zhang, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, Z. B. Li, H. X. Yang, H.S. Xu, A. Zallo, X. Y. Shen, J. M. Bian, Zhenyu Zhang, W. Lai, Y. P. Chu, Y. H. Zhang, Y. Ban, J. S. Huang, Yang Gao, Chun S. J. Pun, X. B. Ji, Wei Wu, A. Zhemchugov, J. Zhang, Shujun Zhao, Yong Liu, M. Kavatsyuk, J. Q. Zhang, C. X. Liu, H. L. Dai, Igor Boyko, Y. Ding, J. C. Li, Shisong Fang, Q. G. Wen, Cui Li, S. P. Wen, Y. Zeng, Zhe Sun, Y. Yuan, Y. S. Zhu, G. M. Xu, C. Z. Yuan, X. S. Qin, X. F. Wang, Huihui Liu, X. R. Zhou, G. R. Lu, J. P. Liu, J. F. Qiu, J. L. Fu, Zhiqing Liu, Cheng Li, Zhiyong Zhang, J. G. Messchendorp, Z. Y. Wang, Z. A. Zhu, X. L. Ji, Xiangdong Ruan, G. X. Sun, Li Yan, S. P. Yu, J. F. Chang, Y. B. Chen, J. Zhuang, B. X. Zhang, G. A. Chelkov, Z. Jiao, Fu-Hu Liu, D. H. Zhang, J. C. Chen, Y. X. Yang, E. H. Thorndike, W. G. Li, Xiaofeng Zhu, J. Z. Zhang, X. Liu, L. Y. Dong, Talib Hussain, Y. B. Zhao, S. B. Liu, S. L. Li, D. H. Sun, Xing Lu, Y. H. Yan, H. J. Lu, J. G. Lu, S. Spataro, X. P. Xu, G. R. Liao, H. H. Zhang, Nasser Kalantar-Nayestanaki, HongSheng Zhao, M. X. Luo, X. H. Liu, Q. J. Wang, R. Poling, C. Zhu, Ke Wang, D. Cronin-Hennessy, F. F. Jing, X. Cai, X. R. Li, J. Min, Z. J. Xiao, H. M. Liu, G. Li, Yulei Han, Q. Liu, Qun-Yao Wang, Jianping Zheng, H. B. Liu, J. F. Hu, M. Pelizaeus, C. J. Tang, X. Sun, M. R. Shepherd, Y. P. Guo, J. P. Dai, G. F. Cao, D. V. Dedovich, C. L. Ma, W. L. Yuan, Q. Ouyang, Julian Schulze, K. L. He, Sai-Juan Chen, T. Hu, Q. Zhao, M. Lv, K. Y. Liu, Joong-Won Park, M. G. Zhao, L. L. Jiang, Y. Z. Sun, C. Geng, S. X. Du, Y. B. Liu, C. D. Fu, Y. P. Lu, B. Wang, V. V. Bytev, Z. Xue, Fenfen An, N. B. Li, M. Destefanis, C. Q. Feng, Guangming Huang, F. A. Harris, Z. Wu, Qi-Wen Lü, S. Qian, Jialun Ping, I. B. Nikolaev, D. Alberto, L. L. Wang, T. C. Zhao, X. Y. Zhang, Q. L. Xiu, Z. Y. Deng, K. H. Rashid, M. Shao, Y. T. Gu, Y. J. Sun, E. Boger, Gang Zhao, Xingguo Li, Q. J. Li, X. T. Liao, Zhiqiang Liu, Miao He, L. P. Zhou, Z. P. Mao, Z. H. An, R. Baldini Ferroli, H. P. Cheng, Z. G. Zhao, J. Fang, K. J. Zhu, Xuantong Zhang, Xiujuan Tang, A. Sarantsev, D. H. Wei, J. S. Lange, Y. F. Wang, A. Calcaterra, C. S. Ji, Q. J. Xu, H. Liang, T. Yang, X. L. Wang, T. J. Min, Z. J. Sun, H. Loehner, X. N. Li, H. B. Li, C. L. Luo, Yuanbo Chen, K. Li, C. C. Zhang, M. L. Chen, B. Zhong, L. B. Guo, X. Y. Ma, Lei Li, W. L. Ding Ding, W. X. Gong, Ulrich Wiedner, Fang Liu, T. Ma, Yanping Huang, I. Denysenko, B. Y. Zhang, C. H. Li, M. Y. Dong, J. H. Zou, S. L. Olsen, R. A. Briere, S. S. Sun, X. S. Jiang, L. K. Jia, Jürgen Becker, R. E. Mitchell, W. B. Yan, M. N. Achasov, and S. Pacetti
Subjects: Physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, Analytical chemistry, Radiative transfer, General Physics and Astronomy, Parity (physics), Atomic physics, Quantum number, Production rate, Gamma gamma
Abstract: A partial wave analysis of the p (p) over bar mass-threshold enhancement in the reaction J/psi -> gamma p (p) over bar is used to determine its J(PC) quantum numbers to be 0(-+), its peak mass to be below threshold at M 1832(-5)(+19)(stat)(-17)(+18)(syst) +/- 19(model) MeV/c(2), and its total width to be Gamma gamma X(p)]BR[X(p (p) over bar) -> p (p) over bar] = [9:0(-1.1)(+0.4)(stat)(-5.0)(+1:5)(syst) +/- 2: 3(model)] x 10(-5). A similar analysis performed on psi(3686) -> gamma p (p) over bar decays shows, for the first time, the presence of a corresponding enhancement with a production rate relative to that for J/psi decays of R = [5.08(-0.45)(+0: 71)(stat)(-058)(+0: 67) (syst) +/- 0: 12(model)%.
Published: 2012

109. Search forηc′decays into vector meson pairs

Author: W. G. Li, N. B. Li, X. P. Xu, H. J. Lu, J. G. Lu, C. Zhu, S. Qian, Jialun Ping, L. L. Wang, S. Ma, X. H. Liu, T. Hu, X. Y. Zhang, X. R. Li, D. Toth, H. M. Liu, B. Wang, Y. Ding, Y. J. Sun, E. Boger, A. Zallo, Q. L. Xiu, J. F. Hu, J. P. Dai, Guangming Huang, F. Li, J. S. Huang, Z. Wu, G. F. Cao, C. L. Ma, J. K. C. Leung, Xiao-Tong Lu, G. R. Lu, Jiawei Zhao, Y. Q. Wang, J. Q. Zhang, P. L. Wang, X. L. Luo, C. X. Liu, X. T. Huang, M. Ablikim, A. A. Zafar, F. C. Ma, Y. H. Zheng, H. L. Ma, Z. A. Zhu, Y. Nefedov, H. Mao, Changjin Zhang, G. Rong, Y. H. Guan, Z. Z. Xu, Y. Xu, K. Y. Liu, Zhiyong Zhang, C. Geng, J. M. Bian, Zhenyu Zhang, W. Lai, D. M. Li, M. Maggiora, Ling Zhao, H. X. Yang, H.S. Xu, Yao Wang, X. Liu, Chun S. J. Pun, Q. Liu, Qun-Yao Wang, G. F. Xu, D. H. Sun, A. Calcaterra, C. S. Ji, C. P. Shen, Y. X. Yang, B. Huang, X. H. Mo, L. S. Wang, Lei Zhao, M. H. Ye, Z. J. Xiao, Y. P. Guo, S. Jin, Huihui Liu, Tao Luo, Xiang Li, Z. Y. He, Z. L. Hou, Yang Yang, F. Jing, X. Q. Hao, M. R. Shepherd, J. P. Liu, J. C. Chen, Y. L. Han, Z. P. Zheng, L. H. Wu, T. J. Min, K. J. Zhu, J. G. Messchendorp, S. L. Olsen, R. A. Briere, H. Liang, R. Baldini, Nasser Kalantar-Nayestanaki, Q. Zhao, T. Yang, X. S. Jiang, Xiaobo Zhu, Cong-Feng Qiao, X. L. Ji, S. P. Yu, G. A. Chelkov, X. Y. Song, Y.N. Gao, S. L. Li, Y. H. Yan, Q. M. Ma, L. K. Jia, M. H. Gu, J. B. Jiao, G. M. Xu, C. Z. Yuan, Z. G. Wang, B. X. Yu, Y. Z. Sun, H. Y. Sheng, H. Y. Zhang, J. Zhong, A. Q. Guo, Meng Wang, N. Yu. Muchnoi, Chang Liu, Z. G. Zhao, J. F. Qiu, D. Cronin-Hennessy, K. Goetzen, W. Kuehn, Heng-Yun Ye, C. X. Yu, Gang Zhao, J. X. Zuo, G. F. Chen, T. R. Zhang, J. Z. Bai, Y. W. Liu, Y. H. Zhang, Talib Hussain, Y. F. Wang, B. Zheng, X. L. Wang, R. G. Ping, Michela Greco, J. Y. Zhang, Y. J. Mao, HongSheng Zhao, Q. J. Wang, Y. S. Zhu, Z. A. Liu, Ye Yuan, Y. T. Liang, L. Y. Dong, X. Y. Ma, H. S. Chen, Shujun Zhao, R. Poling, H. M. Hu, Z. L. Zhao, Q. G. Wen, Y. Ban, Xiangdong Ruan, Zhihao Xu, W. X. Gong, Yong Liu, Chuan Liu, Jianping Zheng, W. L. Yuan, Q. Ouyang, L. Zhong, Z. Y. Wang, M. L. Chen, S. S. Fang, Y. P. Chu, X. B. Ji, Z. B. Li, J. Zhang, M. Kavatsyuk, S. P. Wen, X. S. Qin, X. R. Zhou, Y. K. Heng, H. L. Dai, Igor Boyko, J. L. Fu, Cheng Li, H. H. Zhang, Z. J. Sun, H. Loehner, Y. Zhang, Y. B. Liu, J. W. Zhang, C. H. Li, Q. An, I. B. Nikolaev, Wei Wu, S. J. Chen, O. Bondarenko, M. Lv, Y. G. Xie, A. Zhemchugov, Julian Schulze, Joong-Won Park, B. X. Zhang, Ke Wang, M. Pelizaeus, M. G. Zhao, Q. P. Ji, Z. Xue, X. Sun, K. H. Rashid, L. Zhang, G. Li, M. Shao, Y. T. Gu, X. B. Ma, M. Destefanis, V. V. Bytev, Qi-Wen Lü, S. X. Du, Feng Liu, Fenfen An, S. H. Zhang, C. D. Fu, X. Y. Shen, C. Q. Feng, D. Alberto, H. B. Li, Jingwei Zhao, C. L. Luo, Z. Y. Deng, Yuanbo Chen, Q. J. Li, X. Tang, Xingguo Li, W. D. Li, Shan Wang, X. T. Liao, C. C. Zhang, Shou-hua Zhu, Q. J. Xu, B. Zhong, L. B. Guo, Z. H. An, Y. F. Liang, Cui Li, A. Sarantsev, D. H. Wei, Lei Li, X. N. Li, Ulrich Wiedner, D. P. Jin, G. S. Varner, J. S. Lange, Hang Liu, Xuantong Zhang, T. Ma, Yanping Huang, H. H. Liu, J. C. Li, J. Zhuang, Q. A. Malik, M. X. Luo, D. V. Dedovich, B. S. Zou, Niklaus Berger, Zhiqiang Liu, Miao He, L. P. Zhou, Ting Zhao, Z. P. Mao, H. P. Cheng, J. Fang, J. F. Sun, K. Li, Fang Liu, Y. Zeng, Zhe Sun, I. Denysenko, J. Min, H. B. Liu, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Zhiqing Liu, B. Y. Zhang, K. L. He, J. F. Chang, N. Wu, Krisztian Peters, M. Qi, S. Pacetti, H. L. Tian, G. X. Sun, Li Yan, Z. Jiao, Fu-Hu Liu, D. H. Zhang, M. Y. Dong, Y. B. Zhao, B. Q. Wang, S. Spataro, S. B. Liu, C. J. Tang, X. Cai, Y. P. Lu, M. Bertani, J. H. Zou, Brent J. Liu, S. S. Sun, Zujian Wang, Jürgen Becker, B. Spruck, X. H. Zhao, R. E. Mitchell, W. B. Yan, M. N. Achasov, Y. S. Zhang, L. L. Jiang, F. A. Harris, Z. Ning, and X. K. Zhou
Subjects: Physics, Nuclear and High Energy Physics, Particle decay, Crystallography, Particle physics, Pair production, Meson, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, Vector meson, Dimensionless quantity
Abstract: The processes {eta}{sub c}{sup '{yields}{rho}0{rho}0}, K{sup *0}K{sup *0}, and {phi}{phi} are searched for using a sample of 1.06x10{sup 8} {psi}{sup '} events collected with the BESIII detector at the BEPCII collider. No signals are observed in any of the three final states. The upper limits on the decay branching fractions are determined to be B({eta}{sub c}{sup '}{yields}{rho}{sup 0}{rho}{sup 0})
Published: 2011

110. Higher-order multipole amplitude measurement inψ′→γχc2

Author: Y. Zhang, Q. An, Wei Wu, Y. B. Zhao, A. Zhemchugov, J. M. Bian, M. Greco, Y. L. Han, Zhenyu Zhang, W. Lai, Z. G. Zhao, Xiao-Tong Lu, H. L. Ma, D. M. Li, X. T. Liao, N. B. Li, Y. X. Yang, C. J. Tang, Y. Nefedov, J. K. C. Leung, M. R. Shepherd, Q. Zhao, Y. Z. Sun, Gang Zhao, Y. P. Lu, J. C. Chen, X. L. Ji, J. Min, Z. Z. Xu, Y. Xu, K. Y. Liu, S. P. Yu, G. A. Chelkov, Nasser Kalantar-Nayestanaki, H. Mao, Changjin Zhang, J. Z. Bai, R. Baldini, Y. H. Zheng, Y. S. Zhang, L. L. Jiang, HongSheng Zhao, Q. J. Wang, H. B. Liu, Talib Hussain, Xiaobo Zhu, Cong-Feng Qiao, K. L. He, M. H. Ye, Q. L. Xiu, H. X. Yang, H.S. Xu, Q. P. Ji, S. L. Li, Y. W. Liu, Y. G. Xie, J. F. Sun, Meng Wang, Y. H. Yan, Y. Zeng, Q. M. Ma, N. Yu. Muchnoi, P. L. Wang, Q. J. Xu, Yao Wang, F. A. Harris, Z. G. Wang, Q. Liu, Qun-Yao Wang, H. Y. Zhang, Feng Liu, S. H. Zhang, X. Y. Shen, Z. J. Sun, H. Loehner, Chun S. J. Pun, Heng-Yun Ye, S. X. Du, Qi-Wen Lü, H. M. Hu, Nicolas Berger, Y. S. Zhu, M. Bertani, J. W. Zhang, Y. H. Zhang, L. Y. Dong, Y. F. Wang, R. Poling, Jianping Zheng, M. Lv, Zhe Sun, X. L. Luo, J. X. Zuo, G. F. Chen, J. Q. Zhang, Zhiqing Liu, Y. P. Chu, Z. Xue, Xiangdong Ruan, Q. G. Wen, D. Cronin-Hennessy, J. Y. Zhang, Z. A. Liu, L. Zhang, Y. B. Chen, Shan Wang, Huihui Liu, J. F. Chang, X. B. Ji, Xiaofeng Zhu, J. Z. Zhang, A. Zallo, Z. Y. Wang, D. Alberto, J. P. Liu, Y. Ding, X. Y. Ma, S. Qian, Jialun Ping, M. Destefanis, H. J. Lu, J. G. Lu, W. X. Gong, G. R. Lu, Y. T. Liang, X. H. Liu, J. G. Messchendorp, Jiawei Zhao, X. N. Li, T. Hu, X. Cai, H. B. Li, L. L. Wang, X. Y. Zhang, G. S. Varner, Y. Ban, Y. K. Heng, N. Wu, Krisztian Peters, B. Wang, Hang Liu, J. P. Dai, Z. A. Zhu, Z. B. Li, X. Tang, S. P. Wen, I. B. Nikolaev, C. L. Ma, Xiang Li, Z. Ning, C. H. Li, D. H. Sun, C. L. Luo, Yuanbo Chen, X. S. Qin, X. R. Zhou, Guangming Huang, J. L. Fu, Z. Wu, K. H. Rashid, X. Q. Hao, C. P. Shen, J. Zhang, M. Kavatsyuk, W. G. Li, Ke Wang, M. Pelizaeus, X. Sun, Cheng Li, Y. J. Sun, M. Shao, Y. T. Gu, E. Boger, X. K. Zhou, C. Geng, M. G. Zhao, B. Q. Wang, C. C. Zhang, B. Zhong, L. B. Guo, T. J. Min, K. J. Zhu, S. L. Olsen, R. A. Briere, X. P. Xu, C. Zhu, F. F. Jing, F. Li, V. V. Bytev, S. Spataro, Q. J. Li, B. X. Zhang, Fenfen An, F. C. Ma, H. H. Zhang, M. Qi, H. L. Tian, X. S. Jiang, Z. H. An, Lei Li, Ulrich Wiedner, W. L. Yuan, Q. Ouyang, Z. P. Zheng, M. H. Gu, H. M. Liu, L. Zhong, G. Li, A. Sarantsev, D. H. Wei, L. K. Jia, S. S. Fang, J. F. Hu, H. Y. Sheng, Zhiyong Zhang, J. S. Lange, Tao Luo, Xuantong Zhang, Y. B. Liu, Y. H. Guan, C. D. Fu, G. F. Cao, Chang Liu, C. X. Yu, B. X. Yu, X. Liu, C. Q. Feng, Z. Y. Deng, A. Calcaterra, T. R. Zhang, J. F. Qiu, Brent J. Liu, A. Q. Guo, T. Ma, Yanping Huang, M. Maggiora, Ling Zhao, Z. J. Xiao, Y. P. Guo, B. Huang, B. Zheng, R. G. Ping, Xingguo Li, X. H. Mo, L. S. Wang, Lei Zhao, Z. Y. He, H. S. Chen, Shujun Zhao, Yong Liu, Z. L. Hou, Yang Yang, S. B. Liu, H. H. Liu, J. C. Li, Ye Yuan, H. L. Dai, Igor Boyko, Z. L. Zhao, Julian Schulze, J. B. Jiao, Chuan Liu, Joong-Won Park, Q. A. Malik, J. Zhuang, J. Zhong, M. X. Luo, G. M. Xu, C. Z. Yuan, K. Goetzen, W. Kuehn, D. V. Dedovich, W. D. Li, Cui Li, Zhenli Xu, G. F. Xu, S. Jin, X. Y. Song, S. Ma, X. R. Li, D. Toth, J. S. Huang, C. X. Liu, W. B. Yan, M. N. Achasov, S. Pacetti, M. Y. Dong, J. H. Zou, S. S. Sun, Jürgen Becker, R. E. Mitchell, K. Li, Fang Liu, I. Denysenko, B. Y. Zhang, Zujian Wang, B. Spruck, X. H. Zhao, G. X. Sun, Li Yan, Z. Jiao, Fu-Hu Liu, D. H. Zhang, X. L. Wang, M. L. Chen, L. H. Wu, Y.N. Gao, Jingwei Zhao, Y. F. Liang, D. P. Jin, Y. Q. Wang, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, S. J. Chen, O. Bondarenko, C. S. Ji, H. Liang, T. Yang, X. B. Ma, Shou-hua Zhu, B. S. Zou, Zhiqiang Liu, Miao He, L. P. Zhou, Ting Zhao, Z. P. Mao, H. P. Cheng, J. Fang, and Y. J. Mao
Subjects: Physics, Nuclear and High Energy Physics, Anomalous magnetic dipole moment, Meson, Magnetic moment, Electron–positron annihilation, Hadron, Order (ring theory), Nuclear physics, Particle decay, High Energy Physics::Experiment, Production (computer science), Astrophysics::Earth and Planetary Astrophysics, Atomic physics
Abstract: Using 106x10{sup 6} {psi}{sup '} events collected with the BESIII detector at the BEPCII storage ring, the higher-order multipole amplitudes in the radiative transition {psi}{sup '}{yields}{gamma}{chi}{sub c2}{yields}{gamma}{pi}{sup +}{pi}{sup -}/{gamma}K{sup +}K{sup -} are measured. A fit to the {chi}{sub c2} production and decay angular distributions yields M2=0.046{+-}0.010{+-}0.013 and E3=0.015{+-}0.008{+-}0.018, where the first errors are statistical and the second systematic. Here M2 denotes the normalized magnetic quadrupole amplitude and E3 the normalized electric octupole amplitude. This measurement shows evidence for the existence of the M2 signal with 4.4{sigma} statistical significance and is consistent with the charm quark having no anomalous magnetic moment.
Published: 2011

111. ηπ+π−Resonant Structure around1.8 GeV/c2andη(1405)inJ/ψ→ωηπ+π−

Author: K. Li, Fang Liu, Xiang Li, X. Q. Hao, Yao Wang, Y. H. Yan, I. Denysenko, N. Wu, Krisztian Peters, Y. Ding, D. Cronin-Hennessy, R. R. Fan, B. Y. Zhang, Y. W. Liu, Z. Ning, Shan Wang, P. L. Wang, X. L. Luo, S. L. Olsen, R. A. Briere, B. Q. Wang, H. H. Zhang, G. R. Lu, X. X. Cao, X. K. Zhou, S. Spataro, M. Bertani, H. J. Lu, J. G. Lu, F. Li, Z. A. Zhu, M. H. Ye, G. S. Varner, Hang Liu, J. F. Sun, F. C. Ma, X. S. Jiang, W. G. Li, L. K. Jia, T. Hu, J. Z. Bai, Y. H. Guan, H. M. Hu, X. P. Xu, Y. Zeng, C. Zhu, Zhe Sun, J. F. Chang, W. B. Yan, M. N. Achasov, D. H. Sun, X. B. Ma, L. Y. Dong, Nicolas Berger, X. L. Wang, M. Maggiora, Ke Wang, Ling Zhao, X. L. Ji, Y. T. Liang, X. Cai, R. Baldini, Lei Zhao, Z. Y. He, Z. L. Hou, M. H. Gu, Yang Yang, M. Pelizaeus, H. M. Liu, G. A. Chelkov, X. Sun, A. Calcaterra, Z. G. Zhao, S. Pacetti, S. Grishin, H. Y. Sheng, C. P. Shen, Y. B. Chen, Talib Hussain, Xiaofeng Zhu, J. Z. Zhang, Guangming Huang, Mingming Yang, J. W. Zhang, Y. J. Mao, J. F. Hu, M. Greco, G. F. Cao, Xiangdong Ruan, Z. J. Sun, H. Loehner, Z. Wu, G. M. Xu, M. L. Chen, X. Wan, Shou-hua Zhu, C. Z. Yuan, V. V. Bytev, Y. G. Xie, J. F. Qiu, M. Y. Dong, C. X. Yu, L. Zhang, H. B. Li, C. L. Luo, HongSheng Zhao, F. F. Jing, R. Poling, S. X. Du, G. X. Sun, Z. Z. Xu, Y. H. Zheng, Xiaobo Zhu, Cong-Feng Qiao, Yuanbo Chen, Jianping Zheng, L. L. Jiang, I. B. Nikolaev, J. Zhang, Li Yan, J. H. Zou, Y. Xu, K. Y. Liu, K. H. Rashid, X. R. Li, C. C. Zhang, B. Zhong, L. B. Guo, M. Kavatsyuk, Y. P. Chu, W. L. Yuan, S. S. Sun, Lei Li, Q. Ouyang, L. Zhong, M. Shao, Y. T. Gu, S. S. Fang, A. Zallo, X. B. Ji, F. A. Harris, H. X. Yang, H.S. Xu, Q. J. Li, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Ulrich Wiedner, Chun S. J. Pun, Meng Wang, Tao Luo, N. Yu. Muchnoi, T. Ma, Yanping Huang, Z. Xue, Z. L. Zhao, Jiawei Zhao, Jürgen Becker, H. H. Liu, B. S. Zou, Q. P. Ji, Z. H. An, J. K. C. Leung, J. C. Li, Y. B. Liu, B. X. Zhang, Y. F. Wang, Z. P. Zheng, C. S. Ji, Y. H. Zhang, B. X. Yu, Y. Zhang, Y. B. Zhao, Q. An, X. Y. Ma, Q. G. Wen, W. X. Gong, Julian Schulze, Wei Wu, A. Zhemchugov, N. B. Li, H. Liang, T. Yang, J. Zhuang, M. X. Luo, D. V. Dedovich, B. Zheng, R. G. Ping, G. C. Liu, H. S. Chen, Z. Y. Wang, A. Sarantsev, D. H. Wei, J. S. Lange, Shujun Zhao, Feng Liu, S. H. Zhang, X. Y. Shen, Yong Liu, R. E. Mitchell, Huihui Liu, J. P. Liu, J. G. Messchendorp, Y. X. Yang, A. Q. Guo, C. J. Tang, H. L. Dai, Igor Boyko, Zhenli Xu, Chang Liu, T. R. Zhang, Ye Yuan, M. R. Shepherd, S. P. Yu Yu, Y. P. Lu, G. Li, B. Huang, L. Yu, C. D. Fu, X. H. Mo, L. S. Wang, Q. Zhao, Y. Z. Sun, Jingwei Zhao, Q. M. Ma, C. Q. Feng, Zhibing Li, Z. Y. Deng, Gang Zhao, X. H. Liu, Chuan Liu, Z. A. Liu, X. T. Liao, Xiao-Tong Lu, Xingguo Li, Y. S. Zhu, J. P. Dai, W. D. Li, Zhiqiang Liu, Miao He, H. L. Ma, D. M. Li, C. L. Ma, L. P. Zhou, Y. F. Liang, D. P. Jin, Bing Liu, Qi-Wen Lü, Cui Li, K. J. Zhu, C. Geng, Ting Zhao, Z. P. Mao, G. F. Xu, Q. J. Xu, D. Alberto, H. P. Cheng, J. Fang, Y. Ban, S. Jin, X. N. Li, S. P. Wen, X. S. Qin, X. R. Zhou, J. L. Fu, Cheng Li, S. Sonoda, X. Y. Song, Q. Liu, Qun-Yao Wang, Zhiyong Zhang, X. Liu, Z. J. Xiao, Y. P. Guo, K. Goetzen, W. Kuehn, S. Qian, Jialun Ping, L. L. Wang, X. Y. Zhang, Y. J. Sun, D. Toth, J. S. Huang, J. B. Jiao, C. X. Liu, J. Zhong, M. Destefanis, X. Tang, Sachio Komamiya, M. G. Zhao, Xuantong Zhang, J. M. Bian, Zhenyu Zhang, J. C. Chen, Nasser Kalantar-Nayestanaki, Z. G. Wang, Q. A. Malik, H. Y. Zhang, J. X. Zuo, G. F. Chen, J. Y. Zhang, Y. K. Heng, J. Min, H. B. Liu, Y. Nefedov, K. L. He, M. Qi, H. L. Tian, S. B. Liu, L. H. Wu, Y.N. Gao, Y. Q. Wang, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, S. J. Chen, O. Bondarenko, Zujian Wang, B. Spruck, X. H. Zhao, and H. Mao
Subjects: Nuclear physics, Physics, Branching fraction, Electron–positron annihilation, Mass spectrum, Pi, Analytical chemistry, General Physics and Astronomy, High Energy Physics::Experiment, Nuclear Experiment, Omega
Abstract: We present results of a study of the decay J/psi -> omega eta pi(+)pi(-) using a sample of (225.2 +/- 2.8) x 10(6) J/psi events collected by the BESIII detector, and report the observation of a new process J/psi -> omega X(1870) with a statistical significance of 7.2 sigma, in which X(1870) decays to a(0)(+/-)(980)pi(-/+). Fitting to eta pi(+)pi(-) mass spectrum yields a mass M = 1877.3 +/- 6.3(stat)(-7.4)(+3.4)(syst) MeV/c(2), a width Gamma = 57 +/- 12(stat)(-4)(+19)(syst) MeV/c(2), and a product branching fraction B(J/psi -> omega X) x B(X -> a(0)(+/-)(980)pi(-/+)) x B(a(0)(+/-)(980)(->) eta pi(+/-)) = [1.50 +/- 0.26(stat)(-0.36)(+0.72)(syst)] x 10(-4). Signals for J/psi -> omega f(1)(1285) and J/psi -> omega eta(1405) are also clearly observed and measured.
Published: 2011

112. Observation ofχc1Decays into Vector Meson Pairsϕϕ,ωω, andωϕ

Author: Z. G. Wang, J. F. Sun, H. Y. Zhang, P. L. Wang, Qi-Wen Lü, Tao Luo, J. X. Zuo, Y. Zeng, J. K. C. Leung, Zhe Sun, G. F. Chen, M. Maggiora, Ling Zhao, A. Q. Guo, J. Y. Zhang, Y. Q. Wang, B. X. Yu, J. B. Jiao, F. A. Harris, W. B. Yan, Y. J. Mao, H. X. Yang, H.S. Xu, Chun S. J. Pun, Lei Zhao, Z. Y. He, Z. L. Hou, J. P. Liu, S. Grishin, Y. B. Chen, J. G. Messchendorp, Z. P. Zhang, J. Zhong, Xiaofeng Zhu, J. Z. Zhang, X. Tang, X. T. Huang, M. Qi, S. Pacetti, J. C. Li, L. L. Jiang, H. L. Tian, H. S. Chen, N. B. Li, Q. A. Malik, B. Spruck, Y. Ding, Z. P. Zheng, G. Rong, X. H. Liu, B. J. Liu, F. Li, Yong Liu, F. C. Ma, J. Zhuang, H. L. Dai, M. X. Luo, Y. K. Heng, Zhiqiang Liu, Miao He, D. V. Dedovich, Feng Liu, Chang Liu, Xiang Liu, J. P. Dai, Y. H. Guan, G. R. Lu, X. X. Cao, C. Z. Yuan, L. An, R. R. Fan, Shan Wang, S. Sonoda, N. Wu, M. N. Achasov, X. T. Liao, L. P. Zhou, Sachio Komamiya, C. L. Ma, G. F. Xu, M. Ablikim, T. R. Zhang, S. Jin, K. J. Zhu, L. Yu, Z. J. Xiao, Z. A. Zhu, J. F. Qiu, Y. W. Liu, Guofa Xu, M. Shao, Y. T. Gu, Xuantong Zhang, Zhenli Xu, Z. P. Mao, G. R. Liao, A. A. Zafar, M. Y. Dong, A. Zallo, H. J. Lu, J. G. Lu, C. Geng, S. B. Liu, Q. J. Li, D. H. Sun, Y. C. Xu, Z. L. Zhao, Y. Nefedov, W. D. Li, Y. P. Guo, Krisztian Peters, Lingxuan Zhang, Qun-Yao Wang, B. Q. Wang, X. Y. Song, H. P. Cheng, C. P. Shen, J. Fang, M. Z. Wang, R. Baldini, G. S. Varner, Q. M. Ma, Y. B. Zhao, D. Toth, H. B. Li, J. Z. Bai, C. L. Luo, J. F. Chang, M. Kavatsyuk, Yuanbo Chen, Hang Liu, T. Hu, Julian Schulze, Cui Li, Z. H. An, F. F. Jing, C. C. Zhang, B. Zhong, L. B. Guo, Lei Li, X. L. Li, HongSheng Zhao, X. N. Li, S. Qian, Q. An, Jialun Ping, Jianping Zheng, C. S. Ji, Y. P. Chu, Z. A. Liu, X. Y. Zhang, Y. J. Sun, B. X. Zhang, H. Mao, X. Cai, Jingwei Zhao, W. L. Yuan, Q. Ouyang, L. Zhong, Y. H. Yan, A. Sarantsev, D. H. Wei, J. S. Lange, Y. H. Zheng, Xiaobo Zhu, Cong-Feng Qiao, N. Yu. Muchnoi, Y. H. Zhang, Y. Ban, S. S. Fang, D. Cronin-Hennessy, Hao Liu, J. S. Huang, C. X. Liu, G. A. Chelkov, X. B. Ji, H. Liang, S. L. Olsen, T. Yang, Q. G. Wen, Y. F. Liang, T. Ma, Yanping Huang, Q. P. Ji, J. H. Zou, Guangming Huang, C. J. Tang, Y. Yuan, Y. S. Zhu, M. G. Zhao, Y. H. Yang, S. S. Sun, Y. P. Lu, D. P. Jin, Mingming Yang, I. R. Boyko, M. H. Ye, X. L. Ji, S. P. Wen, Y. B. Liu, X. S. Qin, X. R. Zhou, K. Goetzen, W. Kuehn, Z. Y. Wang, K. H. Rashid, S. X. Du, K. Y. Liu, Z. Xue, M. Y. Duan, Z. G. Zhao, Yao Wang, J. L. Fu, Y. T. Liang, Cheng Li, S. H. Zhang, X. Y. Shen, Z. Y. Zhang, Z. Wu, Ke Wang, X. Sun, X. L. Luo, Z. Ning, H. H. Zhang, Y. N. Gao, Z. J. Sun, Q. Liu, M. Destefanis, Xichao Ruan, H. Loehner, G. Li, S. J. Chen, Y. Zhang, M. H. Gu, Jürgen Becker, J. M. Bian, H. Y. Sheng, R. Poling, V. V. Bytev, Y. G. Xie, R. E. Mitchell, X. L. Wang, X. Wan, S. J. Zhao, C. D. Fu, Jun-Yi Zhang, C. Q. Feng, C. X. Yu, X. B. Ma, Z. Y. Deng, M. L. Chen, T. C. Zhao, L. Y. Dong, Fang Liu, U. Wiedner, B. Zheng, R. G. Ping, Wei Wu, G. C. Liu, Chuan Liu, W. G. Li, L. H. Wu, J. C. Chen, S. Spataro, C. Zhu, H. M. Liu, I. Denysenko, M. Greco, Shou-hua Zhu, J. F. Hu, Zujian Wang, G. F. Cao, Xiao-Tong Lu, B. Y. Zhang, X. R. Li, H. L. Ma, B. S. Zou, X. H. Zhao, D. M. Li, B. Huang, X. H. Mo, L. S. Wang, M. Pelizaeus, Y. X. Yang, O. Bondarenko, M. R. Shepherd, P. Zweber, L. L. Wang, G. X. Sun, Li Yan, Q. Zhao, Y. Z. Sun, Z. Jiao, D. H. Zhang, Gang Zhao, Alexey Zhemchugov, H. M. Hu, F. H. Liu, Nicolas Berger, J. W. Zhang, Jiawei Zhao, X. K. Zhou, X. Q. Hao, X. Q. Li, Z. Z. Xu, Z. B. Li, Y. F. Wang, T. Hussain, X. Y. Ma, W. X. Gong, R. A. Briere, X. S. Jiang, L. K. Jia, J. Min, H. B. Liu, K. L. He, and M. Bertani
Subjects: Physics, Particle physics, Hadron, General Physics and Astronomy, High Energy Physics::Experiment, Vector meson, Omega, Helicity
Abstract: Using $(106\ifmmode\pm\else\textpm\fi{}4)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(3686)$ events accumulated with the BESIII detector at the BEPCII ${e}^{+}{e}^{\ensuremath{-}}$ collider, we present the first measurement of decays of ${\ensuremath{\chi}}_{c1}$ to vector meson pairs $\ensuremath{\phi}\ensuremath{\phi}$, $\ensuremath{\omega}\ensuremath{\omega}$, and $\ensuremath{\omega}\ensuremath{\phi}$. The branching fractions are measured to be $(4.4\ifmmode\pm\else\textpm\fi{}0.3\ifmmode\pm\else\textpm\fi{}0.5)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, $(6.0\ifmmode\pm\else\textpm\fi{}0.3\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, and $(2.2\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}0.2)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$, for ${\ensuremath{\chi}}_{c1}\ensuremath{\rightarrow}\ensuremath{\phi}\ensuremath{\phi}$, $\ensuremath{\omega}\ensuremath{\omega}$, and $\ensuremath{\omega}\ensuremath{\phi}$, respectively, which indicates that the hadron helicity selection rule is significantly violated in ${\ensuremath{\chi}}_{\mathrm{cJ}}$ decays. In addition, the measurement of ${\ensuremath{\chi}}_{\mathrm{cJ}}\ensuremath{\rightarrow}\ensuremath{\omega}\ensuremath{\phi}$ provides the first indication of the rate of doubly OZI-suppressed ${\ensuremath{\chi}}_{\mathrm{cJ}}$ decay. Finally, we present improved measurements for the branching fractions of ${\ensuremath{\chi}}_{c0}$ and ${\ensuremath{\chi}}_{c2}$ to vector meson pairs.
Published: 2011

113. Search forCPandPviolating pseudoscalar decays intoππ

Author: H. Mao, T. Hussain, X. Y. Ma, W. X. Gong, H. H. Liu, X. Tang, J. C. Li, J. Zhuang, Yao Wang, Yin Xu, A. Zallo, J. F. Sun, Y. J. Mao, H. X. Yang, H.S. Xu, M. X. Luo, L. H. Wu, M. Qi, H. L. Tian, Chun S. J. Pun, D. V. Dedovich, Y. Zeng, M. Bertani, B. Huang, X. H. Mo, L. S. Wang, S. B. Liu, Zhe Sun, Z. G. Wang, F. Li, H. Y. Zhang, C. S. Ji, Z. Ning, Y.N. Gao, Z. A. Liu, S. Grishin, Y. H. Yan, X. L. Ji, G. A. Chelkov, Y. B. Chen, M. H. Ye, F. C. Ma, Xiaofeng Zhu, J. Z. Zhang, H. Liang, T. Yang, Jiawei Zhao, K. J. Zhu, Xuantong Zhang, J. P. Liu, Zhenli Xu, S. L. Olsen, R. A. Briere, J. X. Zuo, J. Min, H. B. Liu, Y. Zhang, Q. An, J. K. C. Leung, G. F. Chen, X. S. Jiang, D. Cronin-Hennessy, J. G. Messchendorp, K. L. He, Jingwei Zhao, Tiefu Zhao, Q. P. Ji, Xiangdong Ruan, Q. Liu, Z. P. Zheng, Wei Wu, A. Zhemchugov, Y. Ban, L. K. Jia, X. K. Zhou, G. C. Liu, X. R. Li, D. Toth, J. Y. Zhang, A. Calcaterra, Z. G. Zhao, S. Qian, Jialun Ping, Y. F. Liang, Feng Liu, S. H. Zhang, X. Y. Shen, P. L. Wang, D. P. Jin, S. P. Wen, X. S. Qin, X. R. Zhou, J. F. Qiu, Y. W. Liu, Ke Wang, R. Baldini, Xiao-Tong Lu, Z. J. Sun, H. Loehner, Xiang Li, X. Sun, L. L. Wang, X. Y. Zhang, L. Y. Dong, Y. Ding, W. G. Li, C. Zhu, X. Q. Hao, X. H. Liu, J. L. Fu, Cheng Li, HongSheng Zhao, Y. G. Xie, Y. K. Heng, M. Greco, L. Zhang, Z. L. Zhao, Q. A. Malik, X. L. Luo, G. R. Lu, Zhiqiang Liu, Miao He, Y. Q. Wang, Chang Liu, H. L. Ma, R. Poling, J. M. Bian, D. M. Li, Zhenyu Zhang, J. F. Chang, J. S. Huang, H. B. Li, C. L. Luo, C. X. Liu, X. X. Cao, Yuanbo Chen, Julian Schulze, H. M. Liu, Z. A. Zhu, X. T. Huang, M. Ablikim, L. P. Zhou, G. Rong, J. F. Hu, Jianping Zheng, H. J. Lu, J. G. Lu, S. X. Du, M. H. Gu, C. C. Zhang, G. X. Sun, Li Yan, G. F. Cao, H. Y. Sheng, X. Cai, V. V. Bytev, D. H. Sun, Y. J. Sun, X. Wan, Z. P. Mao, H. P. Cheng, J. Fang, C. P. Shen, M. Pelizaeus, T. Hu, A. A. Zafar, I. B. Nikolaev, T. R. Zhang, L. Yu, Z. Z. Xu, K. Y. Liu, Y. Nefedov, Z. Xue, J. P. Dai, C. X. Yu, B. Zhong, L. B. Guo, Lei Li, Ulrich Wiedner, C. L. Ma, J. C. Chen, Z. Jiao, Fu-Hu Liu, D. H. Zhang, H. M. Hu, H. H. Zhang, M. Shao, Y. T. Gu, Mingming Yang, M. Destefanis, R. R. Fan, Y. X. Yang, Shan Wang, Nasser Kalantar-Nayestanaki, T. Ma, N. Wu, Krisztian Peters, Nicolas Berger, K. H. Rashid, A. Q. Guo, W. D. Li, Q. J. Li, B. Zheng, Yanping Huang, J. W. Zhang, X. B. Ma, R. G. Ping, Guangming Huang, Y. H. Guan, Z. H. An, M. R. Shepherd, Sachio Komamiya, Z. Wu, S. J. Chen, Y. T. Liang, O. Bondarenko, Cui Li, A. Sarantsev, D. H. Wei, J. S. Lange, Q. Zhao, Y. Z. Sun, Shou-hua Zhu, X. F. Tang, M. Maggiora, Ling Zhao, S. Sonoda, L. L. Jiang, G. S. Varner, Q. M. Ma, X. T. Liao, Z. B. Li, N. B. Li, G. R. Liao, Hang Liu, Chuan Liu, Zujian Wang, Qi-Wen Lü, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, B. Q. Wang, Gang Zhao, J. B. Jiao, Y. Yuan, Y. S. Zhu, C. Geng, B. S. Zou, J. Zhang, M. Kavatsyuk, D. Alberto, K. Goetzen, W. Kuehn, Qun-Yao Wang, S. Spataro, B. Spruck, X. H. Zhao, F. A. Harris, J. Zhong, X. N. Li, Y. B. Zhao, G. M. Xu, Tao Luo, C. Z. Yuan, M. G. Zhao, B. X. Yu, B. X. Zhang, Brent J. Liu, H. S. Chen, C. J. Tang, S. P. Yu Yu, Shujun Zhao, Yong Liu, H. L. Dai, Igor Boyko, Y. P. Lu, Kai Liu, J. Z. Bai, G. F. Xu, S. Jin, X. Y. Song, Y. H. Zheng, Xiaobo Zhu, Cong-Feng Qiao, Meng Wang, N. Yu. Muchnoi, Y. H. Zhang, Y. P. Chu, F. F. Jing, X. B. Ji, Q. G. Wen, Z. Y. Wang, G. Li, W. L. Yuan, Q. Ouyang, L. Zhong, C. D. Fu, C. Q. Feng, Z. Y. Deng, Xingguo Li, S. S. Fang, Y. B. Liu, X. L. Wang, M. L. Chen, Zhiyong Zhang, X. Liu, Z. J. Xiao, Y. P. Guo, M. Y. Dong, J. H. Zou, S. S. Sun, Jürgen Becker, R. E. Mitchell, Fang Liu, I. Denysenko, B. Y. Zhang, W. B. Yan, M. N. Achasov, S. Pacetti, and Y. F. Wang
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, Hadron, Analytical chemistry, Elementary particle, Quarkonium, Particle decay, Pi, CP violation, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Using a sample of (225.2 +/- 2.8) x 10(6) J/psi events collected with the Beijing Spectrometer at the Beijing Electron-Positron Collider, CP and P violating decays of eta, eta', and eta(c) into pi(+)pi(-) and pi(0)pi(0) are searched for in J/psi radiative decays. No significant eta, eta', or eta(c) signal is observed, and 90% confidence level upper limits of B(eta -> pi(+)pi(-)) pi(+)pi(-)) pi(+)pi(-)) pi(+)pi(-)) pi(0)pi(0)) pi(0)pi(0))
Published: 2011

114. ηπ+ π- resonant structure around 1.8 GeV/c(2) and η(1405) in J/ψ → ωηπ+ π

Author: M, Ablikim, M N, Achasov, D, Alberto, Q, An, Z H, An, J Z, Bai, R, Baldini, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, A C, Calcaterra, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, R R, Fan, J, Fang, S S, Fang, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, N, Kalantar-Nayestanaki, M, Kavatsyuk, S, Komamiya, W, Kuehn, J S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, K, Li, Lei, Li, N B, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H H, Liu, H M, Liu, H W, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y W, Liu, Yong, Liu, Z A, Liu, Z Q, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, T, Ma, X, Ma, X Y, Ma, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, R E, Mitchell, X H, Mo, N Yu, Muchnoi, Y, Nefedov, I B, Nikolaev, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, Q G, Wen, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Q J, Xu, X P, Xu, Y, Xu, Z R, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, T, Yang, Y, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, S P Yu, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, Z L, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, and J X, Zuo
Abstract: We present results of a study of the decay J/ψ → ωηπ+ π- using a sample of (225.2 ± 2.8) × 10(6) J/ψ events collected by the BESIII detector, and report the observation of a new process J/ψ → ωX(1870) with a statistical significance of 7.2σ, in which X(1870) decays to a(0)(±)(980)π±. Fitting to ηπ+ π- mass spectrum yields a mass M = 1877.3 ± 6.3(stat)(-7.4)(+3.4)(syst) MeV/c(2), a width Γ = 57 ± 12(stat)(-4)(+19)(syst) MeV/c(2), and a product branching fraction B(J/ψ → ωX) × B(X→a(0)(±)(980)π±) × B(a(0) (±)(980) → ηπ±) = [1.50 ± 0.26(stat)(-0.36)(+0.72) (syst)] × 10(-4). Signals for J/ψ → ωf(1)(1285) and J/ψ → ω η(1405) are also clearly observed and measured.
Published: 2011

115. Observation ofχcJdecaying into thepp¯K+K−final state

Author: Y. T. Liang, Z. B. Li, J. Zhang, M. Kavatsyuk, B. X. Zhang, Y. J. Mao, Y. Zhang, Q. An, Wei Wu, A. Zhemchugov, G. C. Liu, Y. W. Liu, Xiao-Tong Lu, M. Y. Dong, Y. H. Yan, H. L. Ma, D. M. Li, D. Cronin-Hennessy, Z. A. Liu, Y. X. Yang, J. H. Zou, K. J. Zhu, M. R. Shepherd, H. H. Zhang, Y. Ban, Q. Zhao, Y. Z. Sun, S. S. Sun, Y. Nefedov, J. F. Chang, Gang Zhao, G. Li, S. P. Wen, Y. H. Guan, X. S. Qin, X. R. Zhou, J. K. C. Leung, C. D. Fu, J. L. Fu, C. Q. Feng, W. D. Li, M. Maggiora, Ling Zhao, X. Cai, Cheng Li, Z. Y. Deng, Cui Li, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, Mingming Yang, Xingguo Li, Y. Ding, Jürgen Becker, J. Z. Bai, M. H. Gu, G. M. Xu, H. Y. Sheng, G. R. Lu, X. X. Cao, Xiangdong Ruan, R. E. Mitchell, X. Wan, P. L. Wang, L. L. Jiang, Qi-Wen Lü, C. Z. Yuan, Y. P. Chu, Z. A. Zhu, C. X. Yu, X. B. Ji, Y. F. Wang, D. H. Sun, B. Zheng, R. G. Ping, D. Alberto, K. H. Rashid, Brent J. Liu, X. Y. Ma, S. Sonoda, M. Shao, Y. T. Gu, W. X. Gong, F. A. Harris, Q. J. Li, W. B. Yan, Q. Liu, Qun-Yao Wang, Z. Ning, N. Wu, Krisztian Peters, M. N. Achasov, Q. P. Ji, Z. H. An, S. Qian, Jialun Ping, L. L. Wang, X. Y. Zhang, Feng Liu, X. K. Zhou, A. Sarantsev, D. H. Wei, J. S. Lange, S. H. Zhang, G. R. Liao, X. Y. Shen, S. Pacetti, B. Q. Wang, C. P. Shen, M. Greco, F. Li, S. Spataro, J. F. Sun, B. Huang, X. L. Ji, X. H. Mo, L. S. Wang, Y. Zeng, Y. J. Sun, G. A. Chelkov, Zhe Sun, F. C. Ma, Talib Hussain, M. H. Ye, Z. Z. Xu, S. Grishin, Y. B. Chen, K. Y. Liu, Xiaofeng Zhu, J. Z. Zhang, P. Zweber, L. An, S. J. Chen, O. Bondarenko, X. F. Tang, Y. G. Xie, Q. M. Ma, Yin Xu, S. L. Olsen, S. X. Du, R. A. Briere, Fang Liu, Zhiyong Zhang, J. F. Qiu, L. H. Wu, X. S. Jiang, I. Denysenko, Y.N. Gao, L. K. Jia, R. R. Fan, Shan Wang, Y. Yuan, Y. S. Zhu, X. Liu, L. Y. Dong, Z. L. Zhao, G. S. Varner, B. Y. Zhang, Hang Liu, Z. J. Xiao, Y. P. Guo, Julian Schulze, Y. Q. Wang, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, J. B. Jiao, J. Zhong, Y. B. Zhao, G. F. Xu, S. Jin, C. J. Tang, Y. P. Lu, H. X. Yang, H.S. Xu, Chun S. J. Pun, X. Y. Song, J. P. Liu, K. Goetzen, W. Kuehn, J. G. Messchendorp, G. X. Sun, Li Yan, W. G. Li, Z. Jiao, Fu-Hu Liu, D. H. Zhang, X. H. Liu, C. Zhu, J. P. Dai, D. Toth, H. M. Liu, C. L. Ma, J. F. Hu, G. F. Cao, Zujian Wang, A. Q. Guo, C. Geng, B. Spruck, X. H. Zhao, J. S. Huang, Chuan Liu, C. X. Liu, Y. H. Zheng, Xiaobo Zhu, Cong-Feng Qiao, Meng Wang, N. Yu. Muchnoi, Y. H. Zhang, Q. G. Wen, Z. Y. Wang, K. Liu, H. Mao, Yao Wang, Z. P. Zheng, Chang Liu, T. R. Zhang, L. Yu, Z. G. Wang, H. Y. Zhang, J. X. Zuo, G. F. Chen, J. Y. Zhang, Xiang Li, Y. K. Heng, Sachio Komamiya, X. Q. Hao, H. B. Li, M. G. Zhao, C. L. Luo, Yuanbo Chen, C. S. Ji, J. M. Bian, Zhenyu Zhang, H. Liang, C. C. Zhang, B. Zhong, L. B. Guo, T. Yang, A. Zallo, Tao Luo, Lei Li, J. C. Chen, Nasser Kalantar-Nayestanaki, Ulrich Wiedner, B. X. Yu, Jiawei Zhao, Zhiqiang Liu, Miao He, H. J. Lu, J. G. Lu, L. P. Zhou, T. Ma, Yanping Huang, Z. P. Mao, T. Hu, H. P. Cheng, J. Fang, H. S. Chen, Shujun Zhao, Yong Liu, N. B. Li, X. B. Ma, J. Min, H. L. Dai, Igor Boyko, H. B. Liu, Shou-hua Zhu, Ke Wang, Z. G. Zhao, K. L. He, X. R. Li, M. Pelizaeus, X. Sun, Guangming Huang, B. S. Zou, H. M. Hu, V. V. Bytev, Nicolas Berger, F. F. Jing, Z. Wu, M. Qi, H. L. Tian, J. W. Zhang, W. L. Yuan, Q. Ouyang, L. Zhong, S. S. Fang, Z. J. Sun, H. Loehner, Y. B. Liu, X. T. Liao, S. B. Liu, L. Zhang, X. L. Luo, M. Bertani, H. H. Liu, J. C. Li, J. Zhuang, M. X. Luo, D. V. Dedovich, X. N. Li, Jingwei Zhao, Tiefu Zhao, Zhenli Xu, Y. F. Liang, D. P. Jin, X. L. Wang, M. L. Chen, Q. A. Malik, X. Tang, Xuantong Zhang, R. Baldini, HongSheng Zhao, R. Poling, Jianping Zheng, Z. Xue, and M. Destefanis
Subjects: Physics, Baryon, Nuclear and High Energy Physics, Nuclear magnetic resonance, Meson, Analytical chemistry, High Energy Physics::Experiment, Lambda
Abstract: First measurements of the decays of the three chi(cJ) states to p (p) over barK(+)K(-) final states are presented. Intermediate phi -> K+K- and Lambda(1520) -> pK(-) resonance states are observed, and branching fractions for chi(cJ) -> (p) over barK(+) Lambda(1520), Lambda(1520)(Lambda) over bar (1520) phi p (p) over bar are reported. We also measure branching fractions for direct chi(cJ) ! p (p) over barK(+)K(-) decays. These are first observations of chi(cJ) decays to unstable baryon resonances and provide useful information about the chi(cJ) states. The experiment uses samples of chi(cJ) mesons produced via radiative transitions from 106 x 10(6) psi' mesons collected in the BESIII detector at the BEPCII e(+)e- collider.
Published: 2011

116. Study of chi(cJ) radiative decays into a vector meson

Author: Z. A. Liu, H. Mao, Y. Ban, Yao Wang, Xiangdong Ruan, S. P. Wen, Y. X. Yang, X. S. Qin, X. R. Zhou, J. L. Fu, Cheng Li, Youchang Yang, Y. T. Liang, Y. B. Zhao, Y. Ding, M. R. Shepherd, A. Q. Guo, J. K. C. Leung, Z. B. Li, H. B. Li, G. R. Lu, Q. Zhao, Y. Z. Sun, C. L. Luo, Yuanbo Chen, X. X. Cao, J. Zhang, M. Kavatsyuk, N. B. Li, Zhiqiang Liu, Miao He, Z. A. Zhu, L. P. Zhou, Ting Zhao, Z. P. Mao, H. P. Cheng, J. Fang, C. C. Zhang, B. Zhong, L. B. Guo, Lei Li, Gang Zhao, Y. Nefedov, F. Li, M. H. Gu, C. J. Tang, Ulrich Wiedner, Y. P. Lu, Y. H. Yan, X. Tang, B. X. Zhang, C. S. Ji, D. H. Sun, M. H. Ye, G. Li, F. C. Ma, Y. H. Zheng, H. Y. Sheng, X. Wan, X. L. Ji, T. Ma, Yanping Huang, Ye Yuan, G. A. Chelkov, Xiaobo Zhu, Cong-Feng Qiao, D. Cronin-Hennessy, A. Zallo, Y. W. Liu, H. Liang, T. Yang, Z. P. Zheng, L. An, Meng Wang, C. D. Fu, C. Q. Feng, J. F. Qiu, C. X. Yu, Xiao-Tong Lu, Talib Hussain, H. H. Liu, J. C. Li, J. Zhuang, N. Yu. Muchnoi, Z. Y. Deng, B. Zheng, R. G. Ping, Ke Wang, M. Pelizaeus, X. B. Ma, Jiawei Zhao, L. L. Jiang, Q. M. Ma, Zhihao Xu, Chuan Liu, Y. H. Zhang, M. X. Luo, X. Sun, D. V. Dedovich, Z. L. Zhao, Shou-hua Zhu, K. J. Zhu, M. Qi, X. R. Li, H. L. Ma, L. Y. Dong, J. F. Sun, Xingguo Li, Julian Schulze, Xuantong Zhang, S. Sonoda, H. X. Yang, H.S. Xu, H. L. Tian, D. M. Li, P. L. Wang, B. S. Zou, Q. G. Wen, Y. G. Xie, S. X. Du, Niklaus Berger, Zhiyong Zhang, Y. S. Zhu, Chang Liu, G. X. Sun, J. Z. Bai, S. L. Olsen, R. A. Briere, Chun S. J. Pun, X. L. Luo, Z. Y. Wang, X. L. Wang, Y. J. Mao, F. A. Harris, Y. Zeng, G. F. Xu, T. R. Zhang, Li Yan, L. Yu, X. S. Jiang, Qi-Wen Lü, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Y. P. Chu, Q. Liu, Qun-Yao Wang, X. Liu, D. Alberto, Zhe Sun, V. V. Bytev, J. P. Liu, R. R. Fan, Shan Wang, X. B. Ji, Xiang Li, J. M. Bian, Zhenyu Zhang, S. Jin, X. H. Liu, X. Q. Hao, L. K. Jia, W. D. Li, S. Grishin, H. H. Zhang, Q. P. Ji, Z. J. Xiao, J. G. Messchendorp, B. Huang, X. H. Mo, L. S. Wang, Y. B. Chen, Y. P. Guo, Xiaofeng Zhu, J. Z. Zhang, G. S. Varner, Hang Liu, H. J. Lu, J. G. Lu, Z. G. Zhao, J. P. Dai, Y. Zhang, Feng Liu, Fang Liu, X. T. Liao, F. Jing, Q. An, R. Baldini, J. F. Chang, I. Denysenko, S. H. Zhang, X. Y. Shen, P. Zweber, Bing Liu, Wei Wu, A. Zhemchugov, C. L. Ma, M. L. Chen, G. C. Liu, Cui Li, J. C. Chen, T. Hu, Y. H. Guan, Z. J. Sun, H. Loehner, W. G. Li, X. Cai, J. B. Jiao, K. H. Rashid, M. Shao, Y. T. Gu, L. Zhang, S. B. Liu, Zujian Wang, Nasser Kalantar-Nayestanaki, C. Geng, X. N. Li, B. Y. Zhang, HongSheng Zhao, Mingming Yang, Q. J. Li, J. Min, X. Y. Song, J. Zhong, M. Maggiora, Ling Zhao, C. Zhu, Z. H. An, Tao Luo, B. Spruck, H. B. Liu, Guangming Huang, Z. Wu, X. H. Zhao, S. J. Chen, Z. Z. Xu, O. Bondarenko, Y. Xu, K. Y. Liu, M. Y. Dong, A. Sarantsev, D. H. Wei, B. X. Yu, J. S. Lange, Lei Zhao, H. M. Liu, Jingwei Zhao, Sachio Komamiya, Michela Greco, R. Poling, Jianping Zheng, X. F. Tang, Z. Ning, J. H. Zou, K. L. He, Y. F. Wang, H. S. Chen, J. F. Hu, Z. Y. He, Z. L. Hou, Shujun Zhao, G. F. Cao, Yong Liu, H. L. Dai, Igor Boyko, S. S. Sun, H. M. Hu, K. Goetzen, W. Kuehn, S. Qian, Jialun Ping, W. L. Yuan, X. Y. Ma, Q. Ouyang, L. L. Wang, L. Zhong, Y. F. Liang, W. X. Gong, Jürgen Becker, D. P. Jin, X. K. Zhou, X. Y. Zhang, R. E. Mitchell, Z. Xue, M. Bertani, Y. J. Sun, W. B. Yan, M. N. Achasov, J. W. Zhang, S. S. Fang, Y. B. Liu, S. Pacetti, G. M. Xu, C. Z. Yuan, M. G. Zhao, N. Wu, Krisztian Peters, L. H. Wu, M. Destefanis, Q. A. Malik, Z. G. Wang, H. Y. Zhang, Y.N. Gao, G. R. Liao, B. Q. Wang, D. Toth, J. X. Zuo, C. P. Shen, G. F. Chen, J. Y. Zhang, S. Spataro, J. S. Huang, C. X. Liu, Y. Q. Wang, Y. K. Heng, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, and KVI - Center for Advanced Radiation Technology
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Radiative transfer, Vector meson, Omega, DETECTOR, High Energy Physics - Experiment
Abstract: The decays $\chi_{cJ}\to\gamma V$ ($V=\phi, \rho^0, \omega$) are studied with a sample of radiative $\psip\to\gamma\chi_{cJ}$ events in a sample of $(1.06\pm0.04)\times 10^{8} \psip$ events collected with the BESIII detector. The branching fractions are determined to be: ${\cal B}(\chi_{c1}\to \gamma\phi)=(25.8\pm 5.2\pm 2.3)\times 10^{-6}$, ${\cal B}(\chi_{c1}\to \gamma\rho^0)=(228\pm 13\pm 22)\times 10^{-6}$, and ${\cal B}(\chi_{c1}\to \gamma\omega)=(69.7\pm 7.2\pm 6.6)\times 10^{-6}$. The decay $\chi_{c1}\to \gamma\phi$ is observed for the first time. Upper limits at the 90% confidence level on the branching fractions for $\chi_{c0}$ and $\chict$ decays into these final states are determined. In addition, the fractions of the transverse polarization component of the vector meson in $\chi_{c1}\to \gamma V$ decays are measured to be $0.29_{-0.12-0.09}^{+0.13+0.10}$ for $\chi_{c1}\to \gamma\phi$, $0.158\pm 0.034^{+0.015}_{-0.014}$ for $\chi_{c1}\to \gamma\rho^0$, and $0.247_{-0.087-0.026}^{+0.090+0.044}$ for $\chi_{c1}\to \gamma\omega$, respectively. The first errors are statistical and the second ones are systematic., Comment: 8 pages, 3 figures
Published: 2011

117. Observation of χ(c1) decays into vector meson pairs φφ, ωω, and ωφ

Author: M, Ablikim, M N, Achasov, L, An, Q, An, Z H, An, J Z, Bai, R, Baldini, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, M Y, Duan, R R, Fan, J, Fang, S S, Fang, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, M, Kavatsyuk, S, Komamiya, W, Kuehn, J S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, Lei, Li, N B, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H M, Liu, H W, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y W, Liu, Yong, Liu, Z A, Liu, Z Q, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, T, Ma, X, Ma, X Y, Ma, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, R E, Mitchell, X H, Mo, N Yu, Muchnoi, Y, Nefedov, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, X F, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, Q G, Wen, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Y, Xu, Z R, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, T, Yang, Y, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, Z L, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, J X, Zuo, and P, Zweber
Abstract: Using (106±4)×10⁻⁶ ψ(3686) events accumulated with the BESIII detector at the BEPCII e⁺e⁻ collider, we present the first measurement of decays of χ(c1) to vector meson pairs φφ, ωω, and ωφ. The branching fractions are measured to be (4.4±0.3±0.5)×10⁻⁴, (6.0±0.3±0.7)×10⁻⁴, and (2.2±0.6±0.2)×10⁻⁵, for χ(c1)→φφ, ωω, and ωφ, respectively, which indicates that the hadron helicity selection rule is significantly violated in χ(cJ) decays. In addition, the measurement of χ(cJ)→ωφ provides the first indication of the rate of doubly OZI-suppressed χ(cJ) decay. Finally, we present improved measurements for the branching fractions of χ(c0) and χ(c2) to vector meson pairs.
Published: 2011

118. Confirmation of theX(1835)and Observation of the ResonancesX(2120)andX(2370)inJ/ψ→γπ+π−η′

Author: HY Zhang, Z. Xue, H. M. Hu, Zong-Ping Zheng, M. Qi, M. Y. Dong, Haosheng Chen, F. F. Jing, B. Zhong, L. B. Guo, W. L. Yuan, S. S. Sun, Z. Ning, P. L. Wang, X. L. Luo, H. S. Zhao, Y. B. Liu, X. B. Ma, Y. Xu, N. B. Li, Q Zhao, Meng Wang, N. Yu. Muchnoi, Hai Liang, L. An, Yang Gao, S. G. Wang, F. Feldbauer, Qingming Ma, M. H. Ye, J. C. Chen, M. Y. Duan, D. P. Jin, Chang Liu, C. Q. Feng, C. X. Yu, Zhibing Li, Y. H. Zhang, Q. W. Lu, A. Zhemchugov, Kunlun He, K. Peters, Z. P. Mao, X. L. Wang, R. R. Fan, T. R. Zhang, Chang-Zheng Yuan, D. H. Zhang, X. H. Zhao, Shou-hua Zhu, X. K. Zhou, J. F. Hu, C. Motzko, J. H. Zou, X. B. Ji, K. Goetzen, Y. H. Yan, J. F. Sun, L. Yu, G. X. Sun, W. G. Li, S. L. Olsen, G. Li, Z. Y. Wang, X. Q. Li, W. Kuehn, Hang Liu, J. S. Huang, X. R. Li, M. Maggiora, M. Bertani, C. P. Shen, X. Q. Hao, D. H. Sun, H. Loehner, Z. L. Zhao, G. R. Lu, X. T. Liao, H. Xu, Y. Q. Wang, M. Ablikim, F. C. Ma, D. H. Wei, J. Z. Bai, Y. T. Gu, G. Rong, G. M. Huang, S. J. Zhao, Julian Schulze, Z. Wu, H. H. Zhang, I. Boyko, L. L. Wang, Yi-Fang Zhao, L. Zhang, Q. J. Li, H. M. Liu, X. Y. Zhang, Z. Z. Xu, Y. Zeng, X. L. Ji, J. F. Qiu, M. L. Chen, A. A. Zafar, Xie-Yan Song, B. Huang, Y. H. Guan, L. S. Wang, L. Y. Dong, Niklaus Berger, Yao Wang, G. S. Varner, H. L. Ma, K. Y. Liu, H. L. Tian, C. J. Tang, Z. H. An, M. Shao, H. H. Liu, X. H. Liu, B. Spruck, Ling Zhong, Z. A. Zhu, B. Q. Wang, H. Y. Sheng, Xingtao Huang, M. Greco, P. Zweber, U. Wiedner, Y. J. Mao, V. Bytev, Feng Liu, S. P. Wen, Li Yan, Ling Zhao, Q. Ouyang, Shisong Fang, K. H. Rashid, Y. F. Liang, C. S. Ji, Z. Jiao, Fu-Hu Liu, Y. F. Wang, J. Zhuang, L. H. Wu, R. G. Ping, F. A. Harris, Lei Zhao, Z. Y. He, Yang Yang, Q. Liu, X. L. Li, X. S. Jiang, Brent J. Liu, T. Yang, M. X. Luo, X. D. Ruan, W. B. Yan, L. L. Jiang, M. Destefanis, Cui Li, J. P. Dai, Chunyan Zhu, T. Hussain, X. Y. Ma, H. B. Liu, B. S. Zou, C. X. Liu, Y. S. Zhu, I. Denysenko, Y. T. Liang, X. F. Tang, Z. G. Zhao, Y. X. Yang, J. S. Lange, G. M. Xu, Chunmei Zhang, W. X. Gong, C. Geng, Xueyong Shen, Guangyu Zhao, H. Mao, J. Zhang, M. Kavatsyuk, Zujian Wang, H. J. Lu, Zhiyong Zhang, G. Chelkov, H. L. Dai, M. R. Shepherd, X. X. Cao, X. Liu, Y. W. Liu, T. C. Zhao, J. L. Ping, Y. Z. Sun, Zhi-Jun Sun, S. X. Du, R. Poling, B. X. Yu, Yuanbo Chen, S. B. Liu, Z. Y. Deng, Y. K. Heng, J. W. Zhang, J. M. Bian, Q. A. Malik, Jingwei Zhao, Lei Li, Hua-Bin Li, Z. P. Zhang, Y. Ding, Zhiqiang Liu, Miao He, Daniel P Cronin-Hennessy, R. A. Briere, Xing Lu, A. Zallo, Q. An, Y. Zhang, J. Zhong, T. Ma, S. Qian, Yuehong Xie, Wei Wu, Zhe Sun, G. C. Liu, L. K. Jia, Jiawei Zhao, Y. Yuan, H. P. Cheng, J. Fang, J. F. Chang, S. Grishin, Feng Li, Y. B. Chen, J. Z. Zhang, G. F. Cao, K. Wang, Q. Ji, Jürgen Becker, N. Wu, R. E. Mitchell, M. N. Achasov, J. X. Zuo, S. Pacetti, Fang Liu, Lei Zhou, D. M. Li, B. Y. Zhang, Cheng Li, Y. H. Zheng, X. N. Li, Tao Luo, Xian Lun Zhu, C. D. Fu, Jiangchao Li, Yong Liu, G. F. Xu, M. Pelizaeus, C. L. Luo, B. X. Zhang, Zhihao Xu, Chuan Liu, Chun S. J. Pun, M. G. Zhao, J. P. Liu, J. G. Messchendorp, A. Q. Guo, Mingming Yang, Z. A. Liu, Tao Hu, X. S. Qin, X. R. Zhou, J. L. Fu, Z. J. Xiao, M. H. Gu, Z. G. Wang, X. Wan, B. Zheng, J. Y. Zhang, J. Min, Y. J. Sun, D. Dedovich, Wei Li, S. Sonoda, Shouguang Jin, X. Tang, Y. P. Huang, Sachio Komamiya, Qun-Yao Wang, A. Sarantsev, S. Spataro, Y. Nefedov, X. D. Sun, H. X. Yang, K. J. Zhu, Xuantong Zhang, Y. Ban, Y. P. Lu, G. R. Liao, D. Toth, R. Baldini, X. H. Mo, Jianping Zheng, X. W. Zhu, C. L. Ma, S. H. Zhang, Guo-Ming Chen, Z. L. Hou, Sai-Juan Chen, Y. P. Guo, J. K. C. Leung, J. B. Jiao, Y. P. Chu, Junguang Lu, C. F. Qiao, and X. Cai
Subjects: Physics, Nuclear physics, Particle physics, Pion, Meson, Electron–positron annihilation, Hadron, Mass spectrum, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Quarkonium, Spectral line
Abstract: With a sample of (225.2 +/- 2.8) x 10(6) J/psi events registered in the BESIII detector, J/psi -> gamma pi(+)pi(-)eta' is studied using two eta' decay modes: eta' -> pi(+)pi(-)eta and eta' -> gamma rho(0). The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20 sigma. In addition, in the pi(+)pi(-)eta' invariant-mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2 sigma and 6.4 sigma, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.
Published: 2011

119. Study ofa00(980)−f0(980)mixing

Author: C. Zhu, Y. Ding, J. F. Sun, Fang Liu, Y. H. Yan, H. M. Liu, I. Denysenko, Y. Zeng, G. R. Lu, J. F. Hu, D. Cronin-Hennessy, Zhe Sun, X. X. Cao, G. F. Cao, Y. H. Zheng, Xiaobo Zhu, Cong-Feng Qiao, B. Y. Zhang, Xiangdong Ruan, G. F. Xu, Z. A. Zhu, Meng Wang, N. Yu. Muchnoi, Y. H. Zhang, S. Grishin, S. Jin, Z. G. Wang, D. H. Sun, F. Li, F. C. Ma, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, L. An, J. F. Qiu, Z. L. Zhao, Julian Schulze, Y. X. Yang, H. X. Yang, H.S. Xu, Z. Ning, H. Y. Zhang, H. Mao, Y. H. Guan, P. Zweber, X. Y. Song, Z. Y. Wang, J. Min, J. X. Zuo, G. F. Chen, Chun S. J. Pun, P. L. Wang, Qi-Wen Lü, M. Y. Dong, A. Zallo, M. R. Shepherd, H. B. Liu, J. P. Liu, D. Toth, M. Maggiora, Ling Zhao, Lei Zhao, Z. Y. He, X. K. Zhou, Yao Wang, J. Y. Zhang, J. H. Zou, S. S. Sun, K. L. He, X. H. Liu, W. D. Li, C. S. Ji, J. G. Messchendorp, Y. Nefedov, Q. Zhao, Y. Z. Sun, H. Liang, Jiawei Zhao, Jürgen Becker, Z. L. Hou, Yang Yang, S. J. Chen, G. X. Sun, Li Yan, J. S. Huang, J. P. Dai, Gang Zhao, X. L. Wang, C. L. Ma, M. Greco, C. X. Liu, R. E. Mitchell, X. T. Liao, H. B. Li, C. L. Luo, Yuanbo Chen, Y. J. Mao, T. Yang, Y. K. Heng, Xiang Li, X. Q. Hao, M. Qi, A. Q. Guo, Z. Jiao, Fu-Hu Liu, D. H. Zhang, X. F. Tang, W. B. Yan, Z. P. Zheng, M. N. Achasov, Q. P. Ji, H. L. Tian, F. F. Jing, M. L. Chen, C. Geng, J. M. Bian, Zhenyu Zhang, R. Baldini, R. R. Fan, Shan Wang, C. C. Zhang, B. Zhong, L. B. Guo, W. L. Yuan, G. M. Xu, S. Pacetti, Y. B. Zhao, K. Goetzen, W. Kuehn, Q. Ouyang, L. Zhong, Feng Liu, C. Z. Yuan, S. H. Zhang, S. S. Fang, Lei Li, Ulrich Wiedner, Y. B. Liu, Zhiqiang Liu, Miao He, Z. Z. Xu, J. C. Chen, L. P. Zhou, Chang Liu, Jingwei Zhao, X. Y. Shen, L. H. Wu, Ye Yuan, Ting Zhao, Z. P. Mao, H. P. Cheng, X. N. Li, N. B. Li, J. Fang, Y. Xu, K. Y. Liu, HongSheng Zhao, S. B. Liu, L. L. Jiang, Y. Zhang, Q. An, Y. F. Liang, B. Huang, X. H. Mo, L. S. Wang, M. H. Ye, Y. W. Liu, Tao Luo, D. P. Jin, K. J. Zhu, M. Bertani, Q. M. Ma, X. B. Ma, T. R. Zhang, Y.N. Gao, H. M. Hu, Wei Wu, A. Zhemchugov, Shou-hua Zhu, Chuan Liu, Brent J. Liu, C. J. Tang, R. Poling, Sachio Komamiya, Y. P. Lu, Nicolas Berger, X. R. Li, G. C. Liu, B. X. Yu, L. Yu, X. L. Luo, J. W. Zhang, B. S. Zou, Y. S. Zhu, Jianping Zheng, Xiao-Tong Lu, H. S. Chen, Y. F. Wang, Shujun Zhao, M. G. Zhao, Yong Liu, H. L. Dai, Igor Boyko, N. Wu, Krisztian Peters, K. H. Rashid, Y. T. Liang, M. Shao, Y. T. Gu, F. A. Harris, H. L. Ma, D. M. Li, Z. B. Li, J. Z. Bai, G. R. Liao, Q. J. Li, Ke Wang, M. Pelizaeus, X. Sun, H. H. Zhang, G. A. Chelkov, G. S. Varner, B. Q. Wang, J. Zhang, Z. Xue, C. P. Shen, M. Kavatsyuk, S. Spataro, V. V. Bytev, Y. Q. Wang, Z. H. An, A. Sarantsev, D. H. Wei, X. T. Huang, Zujian Wang, M. Ablikim, J. S. Lange, A. A. Zafar, G. Rong, M. Destefanis, B. X. Zhang, B. Spruck, X. H. Zhao, Hang Liu, J. F. Chang, X. Y. Ma, X. Tang, W. X. Gong, X. Cai, L. Y. Dong, Mingming Yang, Y. P. Chu, Xuantong Zhang, X. B. Ji, Q. A. Malik, G. Li, C. D. Fu, T. Ma, Yanping Huang, C. Q. Feng, H. H. Liu, J. C. Li, Z. Y. Deng, J. Zhuang, M. X. Luo, D. V. Dedovich, S. L. Olsen, Xingguo Li, Zhenli Xu, X. L. Ji, R. A. Briere, M. Y. Duan, Z. G. Zhao, Z. J. Sun, H. Loehner, Talib Hussain, X. S. Jiang, L. Zhang, L. K. Jia, Y. G. Xie, S. X. Du, S. Sonoda, Q. Liu, Qun-Yao Wang, M. H. Gu, H. Y. Sheng, X. Wan, C. X. Yu, B. Zheng, R. G. Ping, Z. A. Liu, Y. Ban, Cui Li, S. P. Wen, X. S. Qin, X. R. Zhou, J. L. Fu, Cheng Li, H. J. Lu, J. G. Lu, T. Hu, Guangming Huang, Z. Wu, J. K. C. Leung, J. B. Jiao, J. Zhong, S. Qian, Jialun Ping, L. L. Wang, X. Y. Zhang, Y. J. Sun, Zhiyong Zhang, X. Liu, Z. J. Xiao, Y. P. Guo, and W. G. Li
Subjects: Physics, Nuclear and High Energy Physics, Nuclear magnetic resonance, Branching fraction, Analytical chemistry
Abstract: Using samples of 2.25 X 10(8) J/psi events and 1.06 X 108 psi' events collected with the BES III detector, we study the f(0)(980) -> a(0)(0)(980) and a(0)(0)(980) -> f(0)(980) transitions in the processes J/psi -> phi f(0)(980) -> phi a(0)(0)(980) and chi(c1) -> pi(0)a(0)(0)(980) -> pi(0)f(0)(980), respectively. Evidence for f(0)(980) -> a(0)(0)(980) is found with a significance of 3.4 sigma, while in the case of a(0)(0)(980) -> f(0)(980) transition, the significance is 1.9 sigma. Measurements and upper limits of both branching ratios and mixing intensities are determined.
Published: 2011

120. First observation of the decaysχcJ→π0π0π0π0

Author: Tao Luo, Zhiyong Zhang, Q. P. Ji, X. Liu, Xiaobo Zhu, Cong-Feng Qiao, M. Bertani, Z. J. Xiao, Feng Liu, S. H. Zhang, Meng Wang, S. L. Olsen, R. A. Briere, N. Yu. Muchnoi, X. Y. Shen, N. Wu, Krisztian Peters, Xiangdong Ruan, G. R. Liao, Y. P. Guo, B. X. Yu, B. Q. Wang, C. P. Shen, S. Spataro, J. Z. Bai, A. Zallo, R. Baldini, W. G. Li, J. F. Sun, Y. Zeng, Zhe Sun, X. S. Jiang, S. Grishin, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Y. H. Zhang, Jingwei Zhao, H. Mao, Z. Ning, C. Zhu, Y. F. Liang, D. P. Jin, L. K. Jia, Y. P. Chu, Brent J. Liu, HongSheng Zhao, R. Poling, H. H. Liu, J. C. Li, Z. Y. Wang, W. D. Li, J. B. Jiao, H. S. Chen, Shujun Zhao, Yong Liu, H. L. Dai, Igor Boyko, Jianping Zheng, Jiawei Zhao, J. Zhong, J. Zhuang, X. B. Ji, Y. Ding, H. M. Liu, Cui Li, M. X. Luo, K. Y. Liu, Z. Xue, G. R. Lu, X. L. Wang, X. X. Cao, J. F. Hu, D. V. Dedovich, Z. A. Zhu, X. H. Liu, M. Destefanis, Yao Wang, X. K. Zhou, G. F. Cao, D. H. Sun, G. Li, J. M. Bian, Zhenyu Zhang, J. P. Dai, Y. H. Yan, M. L. Chen, Michela Greco, C. L. Ma, H. X. Yang, H.S. Xu, P. L. Wang, Qi-Wen Lü, Z. Z. Xu, C. D. Fu, M. Qi, D. Cronin-Hennessy, Y. Xu, Chun S. J. Pun, C. Q. Feng, Alexey Zhemchugov, H. M. Hu, Z. Y. Deng, C. Geng, H. L. Tian, Y. H. Guan, H. B. Li, C. L. Luo, M. Maggiora, Ling Zhao, Yuanbo Chen, J. P. Liu, Q. M. Ma, Xingguo Li, J. W. Zhang, Lei Zhao, Z. Y. He, K. Goetzen, Z. L. Hou, Yang Yang, J. C. Chen, H. J. Lu, J. G. Lu, Y. S. Zhu, W. Kuehn, J. G. Messchendorp, C. C. Zhang, L. L. Jiang, G. M. Xu, C. Z. Yuan, T. Hu, B. Zhong, L. B. Guo, X. L. Ji, Lei Li, G. A. Chelkov, Y. W. Liu, Talib Hussain, F. Li, F. C. Ma, Y. H. Zheng, S. B. Liu, Z. A. Liu, F. A. Harris, L. An, Guangming Huang, Z. G. Wang, Ulrich Wiedner, Z. Wu, H. Y. Zhang, J. Min, Y. Ban, J. F. Qiu, Y. Nefedov, Y. G. Xie, H. H. Zhang, H. B. Liu, S. J. Chen, C. Motzko, J. K. C. Leung, Z. L. Zhao, Q. A. Malik, S. P. Wen, J. F. Chang, X. F. Tang, T. Ma, X. S. Qin, X. R. Zhou, Yanping Huang, K. L. He, J. L. Fu, S. X. Du, Julian Schulze, Cheng Li, J. X. Zuo, K. J. Zhu, X. Cai, G. F. Chen, S. Qian, Jialun Ping, Zujian Wang, L. L. Wang, R. R. Fan, Mingming Yang, Shan Wang, Y. Q. Wang, X. Y. Zhang, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, Y. J. Sun, J. Y. Zhang, B. Spruck, X. L. Luo, X. H. Zhao, D. Toth, Y. F. Wang, Xiang Li, X. Q. Hao, G. S. Varner, Y. X. Yang, Hang Liu, X. Y. Ma, X. Tang, W. X. Gong, J. S. Huang, C. X. Liu, Y. K. Heng, Y. B. Zhao, L. H. Wu, Xuantong Zhang, Y.N. Gao, S. Sonoda, C. J. Tang, M. R. Shepherd, Y. P. Lu, G. F. Xu, S. Jin, Y. T. Liang, Z. B. Li, B. Huang, X. H. Mo, L. S. Wang, Q. Zhao, M. H. Ye, J. Zhang, G. X. Sun, Li Yan, X. Y. Song, M. Kavatsyuk, F. Jing, Z. Jiao, Fu-Hu Liu, D. H. Zhang, P. Zweber, B. X. Zhang, Z. P. Zheng, F. Feldbauer, Chang Liu, Y. Z. Sun, L. Y. Dong, T. R. Zhang, L. Yu, Q. Liu, Qun-Yao Wang, K. H. Rashid, M. Shao, Y. T. Gu, Q. J. Li, Z. H. An, A. Sarantsev, D. H. Wei, J. S. Lange, N. B. Li, Gang Zhao, M. H. Gu, H. Y. Sheng, X. Wan, C. X. Yu, M. Y. Duan, B. Zheng, R. G. Ping, Z. G. Zhao, Z. J. Sun, H. Loehner, L. Zhang, Xiao-Tong Lu, W. L. Yuan, Q. Ouyang, L. Zhong, S. S. Fang, H. L. Ma, D. M. Li, Y. B. Liu, Sachio Komamiya, Y. J. Mao, M. G. Zhao, Y. Zhang, Q. An, Wei Wu, G. C. Liu, M. Y. Dong, Zhiqiang Liu, Miao He, X. T. Liao, L. P. Zhou, J. H. Zou, Ting Zhao, Z. P. Mao, S. S. Sun, H. P. Cheng, J. Fang, Jürgen Becker, X. B. Ma, R. E. Mitchell, X. N. Li, Shou-hua Zhu, X. R. Li, W. B. Yan, M. N. Achasov, B. S. Zou, Niklaus Berger, S. Pacetti, A. Q. Guo, Ye Yuan, Zhihao Xu, Chuan Liu, Fang Liu, I. Denysenko, C. S. Ji, H. Liang, T. Yang, Ke Wang, M. Pelizaeus, X. Sun, B. Y. Zhang, and V. V. Bytev
Subjects: Physics, Nuclear and High Energy Physics, Particle decay, Particle physics, Particle properties, Meson, Branching fraction, Analytical chemistry, Pi
Abstract: We present a study of the P-wave spin-triplet charmonium chi(cJ) decays (J = 0, 1, 2) into pi(0)pi(0)pi(0)pi(0). The analysis is based on 106 x 10(6) psi' decays recorded with the BESIII detector at the BEPCII electron positron collider. The decay into the pi(0)pi(0)pi(0)pi(0) hadronic final state is observed for the first time. We measure the branching fractions B(chi(c0) -> pi(0)pi(0)pi(0)pi(0)) = (3.34 +/- 0.06 +/- 0.44) X 10(-3), B(chi(c1) -> pi(0)pi(0)pi(0)pi(0)) = (0.57 +/- 0.03 +/- 0.08) X 10(-3), and B(chi(c2) -> pi(0)pi(0)pi(0)pi(0)) = (1.21 +/- 0.05 +/- 0.16) X 10(-3), where the uncertainties are statistical and systematical, respectively.
Published: 2011

121. Measurement of the matrix element for the decay η′→ηπ+π

Author: F. Li, Xiaobo Zhu, F. C. Ma, Meng Wang, N. Yu. Muchnoi, Z. Ning, Y. H. Zhang, L. An, C. J. Tang, Q. G. Wen, Kunlun He, Xiao-Yang Zhang, X. T. Liao, H. Xu, H. H. Zhang, Z. Y. Wang, D. Cronin-Hennessy, J. F. Qiu, M. Greco, X. K. Zhou, Z. L. Zhao, Yao Wang, X. Q. Li, Z. Z. Xu, X. H. Liu, J. P. Dai, H. J. Lu, J. G. Lu, K. Y. Liu, C. L. Ma, C. Geng, Y. Q. Wang, Y. Yuan, Julian Schulze, X. N. Li, L. L. Jiang, X. L. Li, M. Ablikim, A. A. Zafar, G. Rong, Y. S. Zhu, Xueyong Shen, Y. T. Liang, N. B. Li, Zujian Wang, Zhi-Jun Sun, R. R. Fan, Shan Wang, Y. H. Guan, H. B. Liu, Y. H. Yan, J. F. Chang, C. S. Ji, Y. F. Wang, Ke Wang, Yin Xu, B. Spruck, X. H. Zhao, H. Liang, T. Yang, Xiangdong Ruan, T. Hu, M. Maggiora, Ling Zhao, M. Pelizaeus, M. Y. Duan, X. Sun, K. Goetzen, Jingwei Zhao, Tiefu Zhao, P. L. Wang, Qi-Wen Lü, X. Y. Ma, Z. G. Zhao, Y. Nefedov, Zhibing Li, L. H. Wu, G. S. Varner, Hang Liu, X. Cai, Q. P. Ji, J. Zhang, M. Kavatsyuk, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, V. V. Bytev, H. Mao, W. Kuehn, W. X. Gong, G. X. Sun, Li Yan, Mingming Yang, W. D. Li, M. H. Ye, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Feng Liu, Guangming Huang, Z. Wu, A. Q. Guo, X. L. Luo, X. B. Ma, H. L. Ma, D. M. Li, Cui Li, X. Q. Hao, B. X. Zhang, Y. F. Liang, D. P. Jin, Tao Luo, G. M. Xu, C. Z. Yuan, H. Loehner, J. Zhuang, Shou-hua Zhu, Y. Ding, S. L. Olsen, J. F. Sun, X. L. Ji, R. A. Briere, Xian Lun Zhu, B. X. Yu, J. S. Huang, X. R. Li, F. A. Harris, J. K. C. Leung, W. B. Yan, G. R. Lu, Y. W. Liu, X. S. Jiang, G. A. Chelkov, X. X. Cao, Talib Hussain, Y. X. Yang, B. S. Zou, L. K. Jia, M. Qi, L. Y. Dong, Jiangchao Li, L. Zhang, H. S. Chen, H. H. Liu, H. L. Tian, Z. A. Zhu, Qingming Ma, M. N. Achasov, Chang Liu, Shisong Fang, Xingtao Huang, Yong Liu, M. R. Shepherd, H. L. Dai, Igor Boyko, Zhiqiang Liu, Miao He, D. H. Sun, Xing Lu, T. R. Zhang, D. Toth, J. Zhong, Q. Zhao, Y. Z. Sun, L. P. Zhou, L. Yu, Brent J. Liu, S. X. Du, M. X. Luo, Yang Gao, Z. P. Mao, H. P. Cheng, J. Fang, X. L. Wang, D. V. Dedovich, Gang Zhao, F. F. Jing, Y. J. Mao, S. B. Liu, Xie-Yan Song, M. Bertani, Ling Zhong, C. X. Liu, S. Pacetti, Y. Zhang, Q. An, Yuehong Xie, Wei Wu, W. L. Yuan, G. C. Liu, Q. Ouyang, Zhihao Xu, Chuan Liu, H. B. Li, Yi-Fang Zhao, C. L. Luo, Yuanbo Chen, Alexey Zhemchugov, H. M. Hu, N. Wu, Krisztian Peters, Y. B. Liu, Nicolas Berger, C. C. Zhang, B. Zhong, L. B. Guo, O. Bondarenko, X. F. Tang, J. W. Zhang, H. X. Yang, Lei Li, Ulrich Wiedner, B. Huang, X. H. Mo, L. S. Wang, Chun S. J. Pun, G. R. Liao, A. Zallo, T. Ma, Yanping Huang, B. Q. Wang, J. P. Liu, C. P. Shen, Jiawei Zhao, P. Zweber, S. Spataro, J. G. Messchendorp, J. Z. Bai, K. H. Rashid, Y. Zeng, M. Shao, Y. T. Gu, Zhe Sun, W. G. Li, Fang Liu, S. Grishin, Q. J. Li, Y. B. Chen, J. Z. Zhang, Y. P. Guo, C. Zhu, Z. H. An, I. Denysenko, A. Sarantsev, D. H. Wei, J. S. Lange, H. M. Liu, Y. P. Chu, J. F. Hu, X. B. Ji, C. F. Qiao, G. F. Cao, B. Y. Zhang, Cheng Li, Y. H. Zheng, Z. A. Liu, M. Y. Dong, S. H. Zhang, Y. Ban, Q. A. Malik, S. P. Wen, X. S. Qin, X. R. Zhou, J. L. Fu, J. H. Zou, Y. J. Sun, K. J. Zhu, S. S. Sun, S. Sonoda, Jürgen Becker, Q. Liu, Qun-Yao Wang, R. E. Mitchell, G. Li, Sai-Juan Chen, M. H. Gu, X. Tang, C. D. Fu, C. Q. Feng, H. Y. Sheng, X. Wan, C. X. Yu, Z. Y. Deng, B. Zheng, R. G. Ping, Xuantong Zhang, R. Baldini, HongSheng Zhao, R. Poling, Jianping Zheng, Z. Xue, M. Destefanis, Sachio Komamiya, M. G. Zhao, Y. P. Lu, Z. G. Wang, H. Y. Zhang, J. X. Zuo, G. F. Chen, J. Y. Zhang, J. Min, Y. K. Heng, J. M. Bian, Zhenyu Zhang, J. C. Chen, J. B. Jiao, Zhiyong Zhang, X. Liu, Z. J. Xiao, S. J. Zhao, S. Qian, Jialun Ping, L. L. Wang, M. L. Chen, G. F. Xu, S. Jin, and Zong-Ping Zheng
Subjects: Physics, Nuclear and High Energy Physics, Branching fraction, Electron–positron annihilation, Monte Carlo method, Detector, Dalitz plot, Sample (graphics), law.invention, Nuclear physics, law, High Energy Physics::Experiment, Matrix element, Nuclear Experiment, Collider
Abstract: The Dalitz plot of eta' -> eta pi(+)pi(-) decay is studied using (225.2 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector at the BEPCII e(+)e(-) collider. With the largest sample of eta' decays to date, the parameters of the Dalitz plot are determined in a generalized and a linear representation. Also, the branching fraction of J/psi -> gamma eta' is determined to be (4.84 +/- 0.03 +/- 0.24) x 10(-3), where the first error is statistical and the second systematic.
Published: 2011

122. Confirmation of the X(1835) and Observation of the Resonances X(2120) and X(2370) in J/ψ→γπ+π-η′

Author: M, Ablikim, M N, Achasov, L, An, Q, An, Z H, An, J Z, Bai, R, Baldini, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, I, Boyko, R A, Briere, V, Bytev, X, Cai, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, M Y, Duan, R R, Fan, J, Fang, S S, Fang, F, Feldbauer, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, M, Kavatsyuk, S, Komamiya, W, Kuehn, J S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, Lei, Li, N B, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H M, Liu, H W, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y W, Liu, Yong, Liu, Z A, Liu, Z Q, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, T, Ma, X, Ma, X Y, Ma, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, R E, Mitchell, X H, Mo, C, Motzko, N Yu, Muchnoi, Y, Nefedov, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, X F, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Y, Xu, Z R, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, T, Yang, Y, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, Z L, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, J X, Zuo, and P, Zweber
Subjects: BARYONIUM, GLUEBALL
Abstract: With a sample of (225.2±2.8)×10(6) J/ψ events registered in the BESIII detector, J/ψ→γπ(+)π(-)η(') is studied using two η(') decay modes: η(')→π(+)π(-)η and η(')→γρ(0). The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20σ. In addition, in the π(+)π(-)η(') invariant-mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2σ and 6.4σ, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.
Published: 2011

123. Evidence forψ′Decays intoγπ0andγη

Author: M. Ablikim, M. N. Achasov, L. An, Q. An, Z. H. An, J. Z. Bai, R. Baldini, Y. Ban, J. Becker, N. Berger, M. Bertani, J. M. Bian, I. Boyko, R. A. Briere, V. Bytev, X. Cai, G. F. Cao, X. X. Cao, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, Y. Chen, Y. B. Chen, H. P. Cheng, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, D. Dedovich, Z. Y. Deng, I. Denysenko, M. Destefanis, Y. Ding, L. Y. Dong, M. Y. Dong, S. X. Du, M. Y. Duan, R. R. Fan, J. Fang, S. S. Fang, F. Feldbauer, C. Q. Feng, C. D. Fu, J. L. Fu, Y. Gao, C. Geng, K. Goetzen, W. X. Gong, M. Greco, S. Grishin, M. H. Gu, Y. T. Gu, Y. H. Guan, A. Q. Guo, L. B. Guo, Y. P. Guo, X. Q. Hao, F. A. Harris, K. L. He, M. He, Z. Y. He, Y. K. Heng, Z. L. Hou, H. M. Hu, J. F. Hu, T. Hu, B. Huang, G. M. Huang, J. S. Huang, X. T. Huang, Y. P. Huang, T. Hussain, C. S. Ji, Q. Ji, X. B. Ji, X. L. Ji, L. K. Jia, L. L. Jiang, X. S. Jiang, J. B. Jiao, Z. Jiao, D. P. Jin, S. Jin, F. F. Jing, M. Kavatsyuk, S. Komamiya, W. Kuehn, J. S. Lange, J. K. C. Leung, Cheng Li, Cui Li, D. M. Li, F. Li, G. Li, H. B. Li, J. C. Li, Lei Li, N. B. Li, Q. J. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, X. R. Li, Z. B. Li, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, X. T. Liao, B. J. Liu, C. L. Liu, C. X. Liu, C. Y. Liu, F. H. Liu, Fang Liu, Feng Liu, G. C. Liu, H. Liu, H. B. Liu, H. M. Liu, H. W. Liu, J. P. Liu, K. Liu, K. Y. Liu, Q. Liu, S. B. Liu, X. H. Liu, Y. B. Liu, Y. W. Liu, Yong Liu, Z. A. Liu, Z. Q. Liu, H. Loehner, G. R. Lu, H. J. Lu, J. G. Lu, Q. W. Lu, X. R. Lu, Y. P. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, C. L. Ma, F. C. Ma, H. L. Ma, Q. M. Ma, T. Ma, X. Ma, X. Y. Ma, M. Maggiora, Q. A. Malik, H. Mao, Y. J. Mao, Z. P. Mao, J. G. Messchendorp, J. Min, R. E. Mitchell, X. H. Mo, C. Motzko, N. Yu. Muchnoi, Y. Nefedov, Z. Ning, S. L. Olsen, Q. Ouyang, S. Pacetti, M. Pelizaeus, K. Peters, J. L. Ping, R. G. Ping, R. Poling, C. S. J. Pun, M. Qi, S. Qian, C. F. Qiao, X. S. Qin, J. F. Qiu, K. H. Rashid, G. Rong, X. D. Ruan, A. Sarantsev, J. Schulze, M. Shao, C. P. Shen, X. Y. Shen, H. Y. Sheng, M. R. Shepherd, X. Y. Song, S. Sonoda, S. Spataro, B. Spruck, D. H. Sun, G. X. Sun, J. F. Sun, S. S. Sun, X. D. Sun, Y. J. Sun, Y. Z. Sun, Z. J. Sun, Z. T. Sun, C. J. Tang, X. Tang, X. F. Tang, H. L. Tian, D. Toth, G. S. Varner, X. Wan, B. Q. Wang, K. Wang, L. L. Wang, L. S. Wang, P. Wang, P. L. Wang, Q. Wang, S. G. Wang, X. L. Wang, Y. D. Wang, Y. F. Wang, Y. Q. Wang, Z. Wang, Z. G. Wang, Z. Y. Wang, D. H. Wei, S. P. Wen, U. Wiedner, L. H. Wu, N. Wu, W. Wu, Z. Wu, Z. J. Xiao, Y. G. Xie, G. F. Xu, G. M. Xu, H. Xu, Y. Xu, Z. R. Xu, Z. Z. Xu, Z. Xue, L. Yan, W. B. Yan, Y. H. Yan, H. X. Yang, M. Yang, T. Yang, Y. Yang, Y. X. Yang, M. Ye, M. H. Ye, B. X. Yu, C. X. Yu, L. Yu, C. Z. Yuan, W. L. Yuan, Y. Yuan, A. A. Zafar, A. Zallo, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. H. Zhang, H. Y. Zhang, J. Zhang, J. W. Zhang, J. Y. Zhang, J. Z. Zhang, L. Zhang, S. H. Zhang, T. R. Zhang, X. J. Zhang, X. Y. Zhang, Y. Zhang, Y. H. Zhang, Z. P. Zhang, Z. Y. Zhang, G. Zhao, H. S. Zhao, Jiawei Zhao, Jingwei Zhao, Lei Zhao, Ling Zhao, M. G. Zhao, Q. Zhao, S. J. Zhao, T. C. Zhao, X. H. Zhao, Y. B. Zhao, Z. G. Zhao, Z. L. Zhao, A. Zhemchugov, B. Zheng, J. P. Zheng, Y. H. Zheng, Z. P. Zheng, B. Zhong, J. Zhong, L. Zhong, L. Zhou, X. K. Zhou, X. R. Zhou, C. Zhu, K. Zhu, K. J. Zhu, S. H. Zhu, X. L. Zhu, X. W. Zhu, Y. S. Zhu, Z. A. Zhu, J. Zhuang, B. S. Zou, J. H. Zou, J. X. Zuo, and P. Zweber
Subjects: Physics, General Physics and Astronomy
Published: 2010

124. Evidence for ψ′ Decays into γπ0 and γη

Author: M, Ablikim, M N, Achasov, L, An, Q, An, Z H, An, J Z, Bai, R, Baldini, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, I, Boyko, R A, Briere, V, Bytev, X, Cai, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, M Y, Duan, R R, Fan, J, Fang, S S, Fang, F, Feldbauer, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, M, Kavatsyuk, S, Komamiya, W, Kuehn, J S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, Lei, Li, N B, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H M, Liu, H W, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X H, Liu, Y B, Liu, Y W, Liu, Yong, Liu, Z A, Liu, Z Q, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, T, Ma, X, Ma, X Y, Ma, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, R E, Mitchell, X H, Mo, C, Motzko, N Yu, Muchnoi, Y, Nefedov, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, X F, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, K, Wang, L L, Wang, L S, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Y, Xu, Z R, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, T, Yang, Y, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, Z L, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, J X, Zuo, and P, Zweber
Abstract: The decays ψ'→γπ(0), γη and γη' are studied using data collected with the BESIII detector at the BEPCII e(+)e(-) collider. The processes ψ'→γπ(0) and ψ'→γη are observed for the first time with signal significances of 4.6σ and 4.3σ, respectively. The branching fractions are determined to be B(ψ'→γπ(0))=(1.58±0.40±0.13)×10(-6), B(ψ'→γη)=(1.38±0.48±0.09)×10(-6), and B(ψ'→γη')=(126±3±8)×10(-6), where the first errors are statistical and the second ones systematic.
Published: 2010

125. Activation and mechanism of Clostridium septicum alpha toxin

Author: Jimmy D. Ballard, W.-L. Yuan, Bruce L. Kagan, Y. Sokolov, and Rodney K. Tweten
Subjects: Cell Membrane Permeability, Bacterial Toxins, Molecular Sequence Data, Biology, medicine.disease_cause, Cleavage (embryo), Microbiology, Hemolysin Proteins, Clostridium, medicine, Trypsin, Amino Acid Sequence, Molecular Biology, Molecular mass, Toxin, Erythrocyte Membrane, biology.organism_classification, Molecular biology, Clostridium septicum, Membrane, Mechanism of action, Biochemistry, Potassium, medicine.symptom, medicine.drug
Abstract: Clostridium septicum produces a single lethal factor, alpha toxin (AT), which is a cytolytic protein with a molecular mass of approximately 48 kDa. The 48 kDa toxin was found to be an inactive protoxin (ATpro) which could be activated via a carboxy-terminal cleavage with trypsin. The cleavage site was located approximately 4 kDa from the carboxy-terminus. Proteolytically activated ATpro had a specific activity of approximately 1.5 x 10(6) haemolytic units mg-1. The trypsin-activated toxin (ATact) was haemolytic, stimulated a prelytic release of potassium ions from erythrocytes which was followed by haemoglobin release, induced channel formation in planar membranes and aggregated into a complex of M(r) > 210,000 on erythrocyte membranes. ATpro did not exhibit these properties. ATact formed pores with a diameter of at least 1.3-1.6 nm. We suggest that pore formation on target cell membranes is responsible for the cytolytic activity of alpha toxin.
Published: 1993

126. Effect of dexamethasone on Coxsackievirus B2-infected rat beating heart cells in culture

Author: Z. X. Gong, J. Y. Shen, H. Z. Chen, T. S. Zhow, Y. Z. Yang, Q. Guo, and W. L. Yuan
Subjects: medicine.medical_specialty, Myocarditis, medicine.drug_class, Coxsackievirus, In Vitro Techniques, Virus, Dexamethasone, Andrology, Cytopathogenic Effect, Viral, Internal medicine, medicine, Animals, Aspartate Aminotransferases, Cells, Cultured, Cytopathic effect, biology, business.industry, Myocardium, Rats, Inbred Strains, medicine.disease, biology.organism_classification, Myocardial Contraction, In vitro, Enterovirus B, Human, Rats, Microscopy, Electron, Endocrinology, Cell culture, Corticosteroid, Cardiology and Cardiovascular Medicine, business, medicine.drug
Abstract: The effects of dexamethasone on cultured rat beating heart cells experimentally infected with coxsackievirus B2 were investigated at an early stage (1–3 days) post challenge. Changes in the release of the cardiac enzyme, aspartate amino-transferase (AST), beating %, cytopathic effect (CPE), virus titre, ultrastructure and alterations of the electrical activity were evaluated. The protective effects of dexamethasone on infected cells were abolished except the release of AST at 5 days post infection. These results suggest that steroids may benefit patients with severe myocarditis if conventional therapy for protection of the myocardium and modulation of immunologic function are concomitantly given.
Published: 1991

127. [Influence of dexamethasone on electrical activities in cultured rat beating myocardial cells infected with Coxsackie B-2 virus]

Author: W L, Yuan, H Z, Chen, Y Z, Yang, X Y, Yang, Y S, Lin, P Y, Jin, and T S, Zhou
Subjects: Myocardium, Action Potentials, Animals, Heart, Rats, Inbred Strains, Cells, Cultured, Dexamethasone, Enterovirus B, Human, Rats
Abstract: The effects of dexamethasone (Dex) on electrical activities in cultured rat beating myocardial cells infected with 100 TCID-50 Coxsackie B-2 virus (CB2V) was evaluated by conventional intracellular microelectrode technique. The frequency began to increase, the beating % decreased, and multiform arrhythmias were shown in the infected group 24 h post-challenge. Meanwhile, the cytopathic effect (CPE) appeared rapidly from 1+ to 3+. In the infected and Dex-treated group, the beating % was higher and the arrhythmias and CPE were less than in the infected group at the same intervals. The numbers of non-beating cells increased parallel to the incubation time in the infected group. Decreases of maximal diastolic potential (MDP), maximal upstroke rate (Vmax), overshoot (OS) and action potential amplitude (APA), and abbreviation of action potential duration (APD50 and APD100) in infected and Dex-treated group were less than those in control group during 24-96 h post-challenge. Premature beats, tachycardia, bradycardia and fibrillation occurred in the early stages after infection. It is surmised that steroids can probably save the lives of patients with severe myocarditis if Dex was supplemented.
Published: 1990

128. Effect of astragalus membranaceus on electric activities of cultured rat beating heart cells infected with Coxsackie B-2 virus

Author: W L, Yuan, H Z, Chen, Y Z, Yang, X Y, Yang, Y S, Lin, P Y, Jin, and T S, Zhou
Subjects: Myocardium, Action Potentials, Animals, Heart, Rats, Inbred Strains, Astragalus propinquus, Microelectrodes, Cells, Cultured, Drugs, Chinese Herbal, Enterovirus B, Human, Rats
Abstract: Astragalus membranaceus (AM) which has a protective effect on rat beating heart cells infected experimentally with Coxsackie B-2 virus was evaluated on the basis of changes in morphologic and electric activity of the cells. Rhythm, beating frequency, beating percentage, cardiac cellular damage and cytopathic effects (CPE) were monitored every 24 h after challenge; electric activities parameters were measured by conventional intracellular microelectrode technique. Significant protective effects were demonstrated when AM was given in the early period of infection. The results suggest that AM should be valuable in preventing and treating acute myocarditis caused by Coxsackie B virus.
Published: 1990

129. [Effect of Astragalus membranaceus on electrical activities of coxsackie B-2 virus-infected rat myocardial cells in culture]

Author: W L, Yuan, H Z, Chen, and T S, Zhou
Subjects: Electrophysiology, Heart Rate, Myocardium, Animals, Rats, Inbred Strains, Astragalus propinquus, Microelectrodes, Cells, Cultured, Drugs, Chinese Herbal, Enterovirus B, Human, Rats
Abstract: Beating Myocardial cell cultures of neonatal rats were prepared in vitro and infected with coxsackie B-2 virus. The cells were evaluated in the post-infected period for changes in beating percentage and cytopathic effect (CPE), alterations in the electrical activities by standard microelectrode techniques, and the protective effect of Astragalus membranaceus (AM) on coxsackie B-2 virus-infected neonatal rat myocardial cell cultures was observed. The beating percentage began to decrease in the infected group at 24 hr and only 27.9 +/- 18.6% was beating at 96 hr after virus challenge, premature beats, tachycardia and fibrillation occurred commonly during the experiment. Meanwhile the CPE appeared rapidly from 1+-3+ at the same interval. Resting potential, action potential amplitude, duration and rate of uptake were shown a significant decrease through 24-96 hr (P less than 0.01). In contrast, the beating and electrical activities were nearly normal and less CPE was shown in myocardial cells treated with AM 1 hr after virus challenge through 24-96 hr (P less than 0.05). The results suggest that AM may be valuable in prophylaxis and treatment of acute coxsackie B-2 virus caused myocarditis.
Published: 1989

130. A study on tea-pigment in prevention of atherosclerosis

Author: F Q, Lou, M F, Zhang, X G, Zhang, J M, Liu, and W L, Yuan
Subjects: Male, Thromboxane B2, Tea, Arteriosclerosis, Animals, Anticoagulants, Pigments, Biological, Rabbits, Blood Coagulation, Catechin, Muscle, Smooth, Vascular, Platelet Aggregation Inhibitors
Abstract: Since Lou Fu-qing et al first reported that tea had effect on the prevention of atherosclerosis (AS) in the 1960s, we have conducted experimental and clinical studies, and found that tea-pigment (TP) could reduce blood coagulability, increase fibrinolysis, prevent platelet adhesion and aggregation, and decrease cholesterol content in aortic walls in vivo (P less than 0.01). In addition, TP was shown to inhibit the proliferation of cultured human aortic smooth muscle cells in normal and elevated LDL circumstance in vitro (P less than 0.01), and decreased the level of T x B2 in platelet-rich plasma and remote myocardial infarction patients (P less than 0.01). TP can be used in the prevention of AS.
Published: 1989

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130 results on '"W. L. Yuan"'

101. First Observation of theM1Transitionψ(3686)→γηc(2S)

102. Observation of two new N* resonances in the decay ψ(3686)→ppπ0

103. Two-photon widths of theχc0,2states and helicity analysis forχc2→γγ

104. Measurements of the Mass and Width of theηcUsing the Decayψ(3686)→γηc

105. Search for a light exotic particle inJ/ψradiative decays

106. First Observation ofη(1405)Decays intof0(980)π0

107. Evidence for the direct two-photon transition from ψ(3686) to J/ψ

108. Spin-Parity Analysis ofpp¯Mass Threshold Structure inJ/ψandψ(3686)Radiative Decays

109. Search forηc′decays into vector meson pairs

110. Higher-order multipole amplitude measurement inψ′→γχc2

111. ηπ+π−Resonant Structure around1.8 GeV/c2andη(1405)inJ/ψ→ωηπ+π−

112. Observation ofχc1Decays into Vector Meson Pairsϕϕ,ωω, andωϕ

113. Search forCPandPviolating pseudoscalar decays intoππ

114. ηπ+ π- resonant structure around 1.8 GeV/c(2) and η(1405) in J/ψ → ωηπ+ π

115. Observation ofχcJdecaying into thepp¯K+K−final state

116. Study of chi(cJ) radiative decays into a vector meson

117. Observation of χ(c1) decays into vector meson pairs φφ, ωω, and ωφ

118. Confirmation of theX(1835)and Observation of the ResonancesX(2120)andX(2370)inJ/ψ→γπ+π−η′

119. Study ofa00(980)−f0(980)mixing

120. First observation of the decaysχcJ→π0π0π0π0

121. Measurement of the matrix element for the decay η′→ηπ+π

122. Confirmation of the X(1835) and Observation of the Resonances X(2120) and X(2370) in J/ψ→γπ+π-η′

123. Evidence forψ′Decays intoγπ0andγη

124. Evidence for ψ′ Decays into γπ0 and γη

125. Activation and mechanism of Clostridium septicum alpha toxin

126. Effect of dexamethasone on Coxsackievirus B2-infected rat beating heart cells in culture

127. [Influence of dexamethasone on electrical activities in cultured rat beating myocardial cells infected with Coxsackie B-2 virus]

128. Effect of astragalus membranaceus on electric activities of cultured rat beating heart cells infected with Coxsackie B-2 virus

129. [Effect of Astragalus membranaceus on electrical activities of coxsackie B-2 virus-infected rat myocardial cells in culture]

130. A study on tea-pigment in prevention of atherosclerosis

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