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1. Experimental study of psi' decays to K+K- pi^0 and K+K- eta

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tapan, I., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. C., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: Using $(106\pm4)\times 10^6$ $\psip$ events accumulated with the BESIII detector at the BEPCII $e^+e^-$ collider, we present measurements of the branching fractions for psi' decays to $K^{+}K^{-}\pi^{0}$ and $K^{+}K^{-}\eta$. In these final states, the decay $\psi'\to K_2^{*}(1430)^+K^-+c.c.$ is observed for the first time, and its branching fraction is measured to be $(7.12\pm{0.62}{\rm (stat.)}^{+1.13}_{-0.61}{\rm (syst.)})\times 10^{-5}$, which indicates a violation of the helicity selection rule in $\psip$ decays. The branching fractions of $\psi'\to K^*(892)^+K^-+c.c., \phi\eta, \phi\pi^0$ are also measured. The measurements are used to test the QCD predictions on charmonium decays., Comment: 18 pages, 12 figures
Published: 2012
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2. First observation of the isospin violating decay $J/\psi\rightarrow \Lambda\bar{\Sigma}^{0}+c.c.$

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tapan, X. F. Tang I., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. C., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract: Using a sample of $(225.2\pm 2.8)\times 10^6$ $J/\psi$ events collected with the BESIII detector, we present results of a study of $J/\psi\rightarrow \gamma\Lambda\bar{\Lambda}$ and report the first observation of the isospin violating decay $J/\psi\rightarrow\Lambda\bar{\Sigma}^{0}+c.c.$, in which $\bar{\Sigma}^{0}$ decays to $\gamma \bar{\Lambda}$. The measured branching fractions are $\mathcal{B}(J/\psi\rightarrow\bar{\Lambda}\Sigma^{0}$) = $(1.46\pm0.11\pm0.12) \times10^{-5}$ and $\mathcal{B}(J/\psi\rightarrow\Lambda\bar{\Sigma^{0}}$) = $(1.37\pm0.12\pm0.11) \times10^{-5}$. We search for $\Lambda(1520) \rightarrow \gamma \Lambda$ decay, and find no evident signal, and an upper limit for the product branching fraction $\mathcal{B}(J/\psi\rightarrow\Lambda\bar{\Lambda}(1520)+c.c.)\times \mathcal{B}(\Lambda(1520)\rightarrow\gamma\Lambda)<4.1 \times10^{-6}$ is set at the 90% confidence level. We also report the observation of $\eta_{c}\rightarrow\Lambda\bar{\Lambda}$ in $J/\psi \rightarrow \gamma \eta_{c}$, $\eta_{c}\rightarrow\Lambda\bar{\Lambda}$ and measure the branching fraction $\mathcal{B}(\eta_{c}\rightarrow\Lambda\bar{\Lambda}) =(1.16\pm0.12 (stat)\pm0.19(syst)\pm0.28(PDG))\times10^{-3}$., Comment: 9 pages, 6 figures; This is a publication-version at Phys. Rev. D
Published: 2012
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3. First observation of the M1 transition $\psi(3686)\to \gamma\eta_c(2S)$

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, L., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: Using a sample of 106 million \psi(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: \psi(3686)\to\gamma\eta_c(2S). Analyses of the processes \psi(2S)\to \gamma\eta_c(2S) with \eta_c(2S)\to \K_S^0 K\pi and K^+K^-\pi^0 gave an \eta_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 \eta_c(2S) mass (M(\eta_c(2S))=3637.6\pm 2.9_\mathrm{stat}\pm 1.6_\mathrm{sys} MeV/c^2), width (\Gamma(\eta_c(2S))=16.9\pm 6.4_\mathrm{stat}\pm 4.8_\mathrm{sys} MeV), and the product branching fraction (\BR(\psi(3686)\to \gamma\eta_c(2S))\times \BR(\eta_c(2S)\to K\bar K\pi) = (1.30\pm 0.20_\mathrm{stat}\pm 0.30_\mathrm{sys})\times 10^{-5}). Combining our result with a BaBar measurement of \BR(\eta_c(2S)\to K\bar K \pi), we find the branching fraction of the M1 transition to be \BR(\psi(3686)\to\gamma\eta_c(2S)) = (6.8\pm 1.1_\mathrm{stat}\pm 4.5_\mathrm{sys})\times 10^{-4}., Comment: 7 pages, 1 figure, 1 table
Published: 2012
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4. Two-photon widths of the $\chi_{c0, 2}$ states and helicity analysis for $\chi_{c2}\ar\gamma\gamma$}

Author: BESIII Collaboration, Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ferroli, R. B., Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ulrich, M. U., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M. W., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: Based on a data sample of 106 M $\psi^{\prime}$ events collected with the BESIII detector, the decays $\psi^{\prime}\ar\gamma\chi_{c0, 2}$,$\chi_{c0, 2}\ar\gamma\gamma$ are studied to determine the two-photon widths of the $\chi_{c0, 2}$ states. The two-photon decay branching fractions are determined to be ${\cal B}(\chi_{c0}\ar\gamma\gamma) = (2.24\pm 0.19\pm 0.12\pm 0.08)\times 10^{-4}$ and ${\cal B}(\chi_{c2}\ar\gamma\gamma) = (3.21\pm 0.18\pm 0.17\pm 0.13)\times 10^{-4}$. From these, the two-photon widths are determined to be $\Gamma_{\gamma \gamma}(\chi_{c0}) = (2.33\pm0.20\pm0.13\pm0.17)$ keV, $\Gamma_{\gamma \gamma}(\chi_{c2}) = (0.63\pm0.04\pm0.04\pm0.04)$ keV, and $\cal R$ $=\Gamma_{\gamma \gamma}(\chi_{c2})/\Gamma_{\gamma \gamma}(\chi_{c0})=0.271\pm 0.029\pm 0.013\pm 0.027$, where the uncertainties are statistical, systematic, and those from the PDG ${\cal B}(\psi^{\prime}\ar\gamma\chi_{c0,2})$ 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 $\chi_{c2}\ar\gamma\gamma$ is measured for the first time to be $f_{0/2} =\Gamma^{\lambda=0}_{\gamma\gamma}(\chi_{c2})/\Gamma^{\lambda=2}_{\gamma\gamma}(\chi_{c2}) = 0.00\pm0.02\pm0.02$., Comment: 10 pages, 4 figures
Published: 2012
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5. Study of $J/\psi\to p\bar{p}$ and $J/\psi\to n\bar{n}$

Author: BESIII Collaboration, Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ferroli, R. B., Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ulrich, M. U., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M. W., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: The decays $J/\psi\to p\bar{p}$ and $J/\psi\to n\bar{n}$ have been investigated with a sample of 225.2 million $J/\psi$ events collected with the BESIII detector at the BEPCII $e^+e^-$ collider. The branching fractions are determined to be $\mathcal{B}(J/\psi\to p\bar{p})=(2.112\pm0.004\pm0.031)\times10^{-3}$ and $\mathcal{B}(J/\psi\to n\bar{n})=(2.07\pm0.01\pm0.17)\times10^{-3}$. Distributions of the angle $\theta$ between the proton or anti-neutron and the beam direction are well described by the form $1+\alpha\cos^2\theta$, and we find $\alpha=0.595\pm0.012\pm0.015$ for $J/\psi\to p\bar{p}$ and $\alpha=0.50\pm0.04\pm0.21$ for $J/\psi\to n\bar{n}$. Our branching-fraction results suggest a large phase angle between the strong and electromagnetic amplitudes describing the $J/\psi\to N\bar{N}$ decay., Comment: 16 pages, 13 figures, the 2nd version, submitted to PRD
Published: 2012
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6. Evidence for the Direct Two-Photon Transition from $\psi(3686)$ to $J/\psi$

Author: BESIII Collaboration, Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ferroli, R. B., Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ulrich, M. U., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M. W., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract: The two-photon transition $\psi(3686)\to\gamma\gamma J/\psi$ is studied in a sample of 106 million $\psi(3686)$ decays collected by the BESIII detector. The branching fraction is measured to be $(3.1\pm0.6(\unit{stat})^{+0.8}_{-1.0}(\unit{syst})) \times10^{-4}$ using $J/\psi\to e^+e^-$ and $J/\psi\to\mu^+\mu^-$ decays, and its upper limit is estimated to be $4.5\times10^{-4}$ at the 90% conference level. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the $\psi(3686)$ decay plane and the $J/\psi$ polarization in this decay are also studied. In addition, the product branching fractions of sequential $E1$ transitions $\psi(3686)\to\gamma\chi_{cJ}, \chi_{cJ}\to\gamma J/\psi (J=0,1,2)$ are reported., Comment: 6 pages, 3 figures, 2 tables
Published: 2012
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7. Precision measurement of the branching fractions of J/psi -> pi+pi-pi0 and psi' -> pi+pi-pi0

Author: BESIII Collaboration, Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ferroli, R. B. F. Baldini, Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, G., Denysenko, I., Destefanis, M., Ding, W. M. Ding, Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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., Liu, K. Y., Liu, S. B., Liu, X., Liu, X. H., Liu, Y. B., Liu, Yong, Liu, Z. A., Liu, Zhiqiang, Liu, Zhiqing, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ulrich, M. U., Varner, G. S., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Werner, M. W., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., 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., Zhao, G., Zhao, H. S., Zhao, Jingwei, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: We study the decays of the J/psi and psi' mesons to pi+pi-pi0 using data samples at both resonances collected with the BES III detector in 2009. We measure the corresponding branching fractions with unprecedented precision and provide mass spectra and Dalitz plots. The branching fraction for J/psi -> pi+pi-pi0 is determined to be (2.137 +- 0.004 (stat.) +0.058-0.056 (syst.) +0.027-0.026 (norm.))*10-2, and the branching fraction for psi' -> pi+pi-pi0 is measured as (2.14 +- 0.03 (stat.) +0.08-0.07 (syst.) +0.09-0.08 (norm.))*10-4. The J/psi decay is found to be dominated by an intermediate rho(770) state, whereas the psi' decay is dominated by di-pion masses around 2.2 GeV/c2, leading to strikingly different Dalitz distributions., Comment: 15 pages, 2 figures
Published: 2012
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8. First observation of $\eta(1405)$ decays into $f_{0}(980)\pi^0$

Author: BESIII Collaboration, Ablikim, M., Achasov, M. N., Alberto, D., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ferroli, R. B. F. Baldini, Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, M., Ding, W. L. Ding, Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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., Liu, K. Y., Liu, Q., Liu, S. B., Liu, X., Liu, X. H., Liu, Y. B., Liu, Yong, Liu, Z. A., Liu, Zhiqiang, Liu, Zhiqing, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Muchnoi, N. Yu., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., Wu, L. H., Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., 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., Zhao, G., Zhao, H. S., 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: The decays $J/\psi \rightarrow \gamma \pi^+\pi^-\pi^0$ and $J/\psi \rightarrow \gamma \pi^0\pi^0\pi^0$ are analyzed using a sample of 225 million $\jpsi$ events collected with the BESIII detector. The decay of $\eta(1405)\ar f_{0}(980)\pi^0$ 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., Comment: Revtex, 6 pages, 4 eps figures, version accepted by Phys. Rev. Letters
Published: 2012
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9. Measurements of the mass and width of the eta_c using psi' -> gamma eta_c

Author: BESIII Collaboration, Ablikim, M., Achasov, M. N., Alberto, D., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ferroli, R. B., Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Bogera, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkova, G., Chen, G., Chen, H. S., Chen, H. X., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenkob, I., Destefanis, M., Ding, W. L., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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., Liu, K. Y., Liu, Q., Liu, S. B., Liu, X., Liu, X. H., Liu, Y. B., Liu, Yong, Liu, Z. A., Liu, Zhiqiang, Liu, Zhiqing, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Muchnoi, N. Yu., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacettic, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsevd, A., Schulze, J., Shao, M., Shene, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Varner, G. S., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., Wu, L. H., Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., 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., Zhao, G., Zhao, H. S., 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., Zhemchugova, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment
Abstract: The mass and width of the lowest lying S-wave spin singlet charmonium state, the eta_c, are measured using a data sample of 1.06x10^8 psi' decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates interference between the signal reaction, psi' -> gamma eta_c, and a non-resonant radiative background to successfully describe the line shape of the eta_c. We measure the eta_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., Comment: 7 pages, 1 figure, 1 table, matches Phys. Rev. Lett. version
Published: 2011
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10. Observation of $\chi_{c1}$ decays into vector meson pairs $\phi\phi$, $\omega\omega$, and $\omega\phi$

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., An, Z. H., Bai, J. Z., Baldini, R., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chelkova, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenkob, I., Destefanis, M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Duan, M. Y., Fan, R. R., Fang, J., Fang, S. S., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, M., Grishin, S., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kavatsyuk, M., Komamiya, S., Kuehn, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R, Liao, X. T., Liu, 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., Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, T., Ma, X., Ma, X. Y., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Mitchell, R. E., Mo, X. H., Muchnoi, N. Yu., Nefedov, Y., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsevc, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Sonoda, S., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., Wu, L. H., Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., Xu, G. F., Xu, G. M., Xu, H., Xu, Y., Xu, Z. R., Xu, Z. Z., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, T., Yang, Y., Yang, Y. X., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, L., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugova, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhong, L., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Zweber, P.
Subjects: High Energy Physics - Experiment
Abstract: Decays of $\chi_{c1}$ to vector meson pairs $\phi\phi$, $\omega\omega$ and $\omega\phi$ are observed for the first time using $(106\pm4)\times 10^6$ $\psip$ events accumulated at the BESIII detector at the BEPCII $e^+e^-$ collider. The branching fractions are measured to be $(4.4\pm 0.3\pm 0.5)\times 10^{-4}$, $(6.0\pm 0.3\pm 0.7)\times 10^{-4}$, and $(2.2\pm 0.6\pm 0.2)\times 10^{-5}$, for $\chi_{c1}\to \phi\phi$, $\omega\omega$, and $\omega\phi$, respectively. The observation of $\chi_{c1}$ decays into a pair of vector mesons $\phi\phi$, $\omega\omega$ and $\omega\phi$ indicates that the hadron helicity selection rule is significantly violated in $\chi_{cJ}$ decays. In addition, the measurement of $\chi_{cJ}\to \omega\phi$ gives the rate of doubly OZI-suppressed decay. Branching fractions for $\chi_{c0}$ and $\chi_{c2}$ decays into other vector meson pairs are also measured with improved precision., Comment: 4 pages, 2 figures
Published: 2011
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11. Observation of Two New N* Resonances in the Decay \psi(3686) \ar ppbarpi0

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., F. F., An, An, Q., Z. H., An, Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, Michela, M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Held, T., Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., C. H., Li, Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., H. B., Li, J. C., Li, Li, K., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, Liu, H., Liu, H. B., Liu, H. H., Liu, H. M., Liu, H. W., Liu, J. P., Liu, K. Y., Kai, Liu, Kun, Liu, Liu, P. L., Liu, S. B., Liu, X., Liu, X. H., Liu, Y., Liu, Y. B., Liu, Z. A., Zhiqiang, Liu, Zhiqing, Liu, Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, S., Ma, T., X. Y., Ma, Ma, Y., Maas, F. E., Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., X. H., Mo, Morales Morales, C., Motzko, C., Muchnoi, N. Y. u., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., L. H., Wu, Wu, N., S. X., Wu, Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., G. F., Xu, G. M., Xu, Xu, H., Q. J., Xu, X. P., Xu, Xu, Y., Z. R., Xu, Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yu, Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, G., Zhao, H. S., Zhao, J. W., Zhao, K. X., Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Published: 2013

12. First observation of the isospin violating decay J/psi -> Lambda(Sigma)over-bar(0) + c.c

Author: Ablikim, M., Achasov, M. N., Achasov, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Chen, J. C., Ma, Q. M., Geng, C., Goetzen, K., Gong, W. X., Varner, G. S., Zhang, C. C., Li, J. C., Gradl, W., Pacetti, S., Greco, M., Li, X. R., Gu, M. H., Gu, Y. T., Ma, S., Guan, Y. H., Wen, S. P., Zhang, D. H., Huang, G. M., Guo, A. Q., Guo, L. B., Jia, L. K., Guo, Y. P., Han, Y. L., Hao, X. Q., Park, J. W., Harris, F. A., Ma, T., Zhang, H. H., He, K. L., Lu, X. R., Boger, E., He, M., Werner, M., He, Z. Y., Jiang, L. L., Liang, H., Jiang, X. S., Jiao, J. B., Zhang, H. Y., Jiao, Z., Xia, L. G., Li, K., Jin, D. P., Jin, S., Peters, K., Zhao, Ling, Jing, F. F., Mo, X. H., Kalantar-Nayestanaki, N., Nefedov, Y., Kavatsyuk, M., Kuehn, W., Lai, W., Wang, B., Ma, X. Y., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Zhao, M. G., Hussain, T., Liu, B. J., Ping, J. L., Wu, L. H., Liu, C. L., Chen, G., Liu, C. X., Cai, X., Liu, C. Y., Bondarenko, O., Liu, F. H., Zhang, J., Liu, Fang, Liu, Feng, Zhao, Q., Liu, H., Liu, H. B., Wang, B. Q., Liu, H. H., Wu, N., Heng, Y. K., Ping, R. G., Zhang, J. Q., Liu, H. M., Liu, H. W., Liu, J. P., Liu, K. Y., Boyko, I., Li, W. D., Wang, K., Liu, Kai, Liu, Kun, Liu, P. L., Zhang, J. W., Ning, Z., Liu, S. B., Wu, S. X., Liu, X., Poling, R., Liu, X. H., Liu, Y., Wang, L. L., Liu, Y. B., Zhao, S. J., Lv, M., Liu, Z. A., Liu, Zhiqiang, Ma, Y., Briere, R. A., Liu, Zhiqing, Loehner, H., Wu, W., Lu, G. R., Wang, L. S., Lu, H. J., Tang, X., Li, C. H., Lu, J. G., Zhao, T. C., Lu, Q. W., Maas, F. E., Prencipe, E., Maggiora, M., Malik, Q. A., Mao, H., Zheng, J. P., Calcaterra, A., Mao, Y. J., Mao, Z. P., Xiao, Z. J., Hou, Z. L., Messchendorp, J. G., Wang, Z. G., Min, J., Min, T. J., Çakiır, O., Mitchell, R. E., Zhang, J. Y., Wang, M., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Hu, H. M., Qin, Y., Chen, M. L., Cronin-Hennessy, D., Qin, Z. H., Li, Q. J., Qiu, J. F., Li, G., Rashid, K. H., Li, Cheng, Rong, G., Çetin, S. A., Ruan, X. D., Hu, J. F., Sarantsev, A., Schaefer, B. D., Zhang, J. Z., Schulze, J., Zhao, Y. B., Lu, Y. P., Xie, Y. G., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Li, Cui, Pelizaeus, M., Cheng, H. P., Shepherd, M. R., Song, X. Y., Chang, J. F., Wiedner, U., Spataro, S., Zhao, Z. G., Spruck, B., Xiu, Q. L., Sun, D. H., Sun, G. X., Zhang, S. H., Sun, J. F., Hu, T., Sun, S. S., Sun, X. D., Wang, P., Li, D. M., Sun, Y. J., Sun, Y. Z., Zhemchugov, A., Sun, Z. J., Zhang, T. R., Chelkov, G., Morales, C. Morales, Sun, Z. T., Huang, B., Tang, C., Wang, P. L., Xu, G. F., Wang, Q., Wang, Q. J., Wang, S. G., Ji, C. S., Chen, H. S., Wang, X. L., Zheng, Y. H., Luo, C. L., Wang, Y. D., Zhao, K. X., Wang, Y. F., Wang, Y. Q., Li, H. B., Wang, Z., Zhang, X. J., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Luo, M. X., Xu, Z. R., Li, W. G., Li, Z. B., Xue, F., Xue, Z., Nicholson, C., Chen, S. J., Motzko, C., Yan, L., Bian, J. M., Yan, W. B., Bytev, V., Yan, Y. H., Yang, H. X., Yang, Y., Huang, J. S., Tang, X. F., Zheng, Z. P., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Muchnoi, N. Yu, Wu, Z., Yu, B. X., Chen, Y., Li, Lei, Zhao, X. H., Yu, C. X., Huang, X. T., Yu, J. S., Zhong, B., Yu, S. P., Yuan, C. Z., Yuan, W. L., Luo, T., Yuan, Y., Zafar, A. A., Zhang, X. Y., Muramatsu, H., Zallo, A., Zeng, Y., Huang, Y. P., Zhang, B. X., Li, N. B., Wang, Z. Y., Chen, Y. B., Luo, X. L., Zhang, B. Y., Zhang, Y., Zhong, J., Zhang, Y. H., Zhang, Y. S., Zhang, Z. P., Li, S. L., Zhang, Z. Y., Ji, Q., Thorndike, E. H., Zhao, G., Held, T., Chu, Y. P., Zhao, H. S., Nikolaev, I. B., Zhao, J. W., Zhou, L., Dai, H. L., Zhou, X. K., Zhou, X. R., Tian, H. L., Zhu, Y. C., Peng, H. P., Cao, G. F., Zhu, Y. M., Zhu, Y. S., Li, X. L., Wei, D. H., Zhu, Z. A., Lange, J. S., Zhuang, J., Li, F., Zou, B. S., Zou, J. H., Zou, J. X., Ma, C. L., Ji, X. B., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Weidenkaff, P., Zheng, B., Denysenko, I., Li, X. N., Olsen, S. L., Destefanis, M., Ma, F. C., Ding, W. M., Ji, X. L., Ding, Y., Dong, L. Y., Dong, M. Y., Toth, D., Du, S. X., Fang, J., Wen, Q. G., Fang, S. S., Fava, L., Ma, H. L., Feldbauer, F., Ouyang, Q., Zhao, Lei, Li, X. Q., Ullrich, M., Feng, C. Q., Uludağ Üniversitesi/Fen Edebiyat Fakültesi., Tapan, İlhan, and CCD-9486-2022
Subjects: Charmonium, Drift Chambers, Branching, Physics, Astronomy & astrophysics, Baryons, Physics, particles & fields, Electromagnetic decays
Abstract: Using a sample of (225.2 +/- 2.8) x 10(6) J/psi events collected with the BESIII detector, we present results of a study of J/psi -> gamma Lambda(Lambda) over bar and report the first observation of the isospin violating decay J/psi -> Lambda(Sigma) over bar (0) + c.c., in which (Sigma) over bar (0) decays to gamma (Lambda) over bar. The measured branching fractions are B(J/psi -> (Lambda) over bar Sigma(0)) = (1.46 +/- 0.11 +/- 0.12) x 10(-5) and B(J/psi -> Lambda(Sigma) over bar (0)) = (1.37 +/- 0.12 +/- 0.11) x 10(-5). We search for Lambda(1520) -> gamma Lambda decay, and find no evident signal, and an upper limit for the product branching fraction B(J/psi -> Lambda(Lambda) over bar (1520) + c.c) x B(Lambda(1520) -> gamma Lambda) < 4.1 x 10(-6) is set at the 90% confidence level. We also report the observation of eta(c) -> Lambda in J/psi -> gamma eta(c), eta(c) -> Lambda(Lambda) over bar and measure the branching fraction B(eta(c) -> Lambda(Lambda) over bar) = (1.16 +/- 0.12(stat) +/- 0.19(syst) +/- 0.28(PDG)) x 10(-3). Ministry of Science and Technology, China - 2009CB825200 National Natural Science Foundation of China (NSFC) - 10625524 / 10821063 / 10825524 / 10835001 / 10935007/ 11125525 / 11079008 / 11179007 Chinese Academy of Sciences - KJCX2-YW-N29 / KJCX2-YW-N45 Istituto Nazionale di Fisica Nucleare (INFN) United States Department of Energy (DOE) - DE-FG02-04ER41291 / DE-FG02-91ER40682 / DE-FG02-94ER40823 National Science Foundation (NSF) University of Groningen (RuG) Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt WCU of National Research Foundation of Korea - R32-2008-000-10155-0 Türkiye Cumhuriyeti Kalkınma Bakanlığı - DPT2006K-120470
Published: 2012

13. Two-photon widths of the chi(c0,2) states and helicity analysis for chi(c2) -> gamma gamma

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., Research unit Nuclear & Hadron Physics, and KVI - Center for Advanced Radiation Technology
Subjects: MODEL, E(+)E(-) COLLISIONS, EVENT GENERATOR, HEAVY QUARKONIA, DECAY-RATES, ANNIHILATION
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

14. First observation of the isospin violating decay $J/��\rightarrow ��\bar��^{0}+c.c.$

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cakir, O., Calcaterra, A., Cao, G. F., Cetin, S. A., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Muramatsu, H., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tapan, X. F. Tang I., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., Zhang, J. Q., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. C., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: Using a sample of $(225.2\pm 2.8)\times 10^6$ $J/��$ events collected with the BESIII detector, we present results of a study of $J/��\rightarrow ��\bar��$ and report the first observation of the isospin violating decay $J/��\rightarrow��\bar��^{0}+c.c.$, in which $\bar��^{0}$ decays to $��\bar��$. The measured branching fractions are $\mathcal{B}(J/��\rightarrow\bar��^{0}$) = $(1.46\pm0.11\pm0.12) \times10^{-5}$ and $\mathcal{B}(J/��\rightarrow��\bar{��^{0}}$) = $(1.37\pm0.12\pm0.11) \times10^{-5}$. We search for $��(1520) \rightarrow ��$ decay, and find no evident signal, and an upper limit for the product branching fraction $\mathcal{B}(J/��\rightarrow��\bar��(1520)+c.c.)\times \mathcal{B}(��(1520)\rightarrow��), 9 pages, 6 figures; This is a publication-version at Phys. Rev. D
Published: 2012
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15. Precision measurement of the branching fractions of J/ψ→π+π−π0 and ψ′→π+π−π0

Author: Ablikim, M., Achasov, M. N., Alberto, D., Ambrose, D. J., F. F., An, An, Q., Z. H., An, Bai, J. Z., Baldini Ferroli, R. B. F., Ban, Y., Becker, J., Berger, N., Bertani, M. B., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Fang, J., Fang, S. S., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., C. H., Li, Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., H. B., Li, J. C., Li, Li, K., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, 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., Yong, Liu, Liu, Z. A., Zhiqiang, Liu, Zhiqing, Liu, Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, S., Ma, T., X. Y., Ma, Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S. P., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ulrich, M. U., Varner, G. S., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Werner, M. W., Wiedner, U., L. H., Wu, Wu, N., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., G. F., Xu, G. M., Xu, Xu, H., Q. J., Xu, X. P., Xu, Xu, Y., Z. R., Xu, Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, S. P., Yu, Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A. Z., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., 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., Zhao, G., Zhao, H. S., Jingwei, Zhao, Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Published: 2012

16. First observation of the M1 transition $��(3686)\to ��_c(2S)$

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales, C. Morales, Motzko, C., Muchnoi, N. Yu., Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peng, H. P., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schaefer, B. D., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, L., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Subjects: High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract: Using a sample of 106 million ��(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: ��(3686)\to��_c(2S). Analyses of the processes ��(2S)\to ��_c(2S) with ��_c(2S)\to \K_S^0 K��and K^+K^-��^0 gave an ��_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 ��_c(2S) mass (M(��_c(2S))=3637.6\pm 2.9_\mathrm{stat}\pm 1.6_\mathrm{sys} MeV/c^2), width (��(��_c(2S))=16.9\pm 6.4_\mathrm{stat}\pm 4.8_\mathrm{sys} MeV), and the product branching fraction (\BR(��(3686)\to ��_c(2S))\times \BR(��_c(2S)\to K\bar K��) = (1.30\pm 0.20_\mathrm{stat}\pm 0.30_\mathrm{sys})\times 10^{-5}). Combining our result with a BaBar measurement of \BR(��_c(2S)\to K\bar K ��), we find the branching fraction of the M1 transition to be \BR(��(3686)\to��_c(2S)) = (6.8\pm 1.1_\mathrm{stat}\pm 4.5_\mathrm{sys})\times 10^{-4}., 7 pages, 1 figure, 1 table
Published: 2012
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17. Observation of χc1 Decays into Vector Meson Pairs ϕϕ, ωω, and ωϕ

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., Z. H., An, Bai, J. Z., Baldini, R., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chelkova, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenkob, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Duan, M. Y., Fan, R. R., Fang, J., Fang, S. S., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, Grishin, S., M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kavatsyuk, M., Komamiya, S., Kuehn, W., Lange, J. S., Leung, J. K. C., Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, 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., Yong, Liu, Liu, Z. A., Liu, Z. Q., Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, T., Ma, X., X. Y., Ma, Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Mitchell, R. E., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsevc, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Sonoda, S., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., G. F., Xu, G. M., Xu, Xu, H., Xu, Y., Z. R., Xu, Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, T., Yang, Y., Yang, Y. X., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, Yu, L., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, G., Zhao, H. S., Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhao, Z. L., Zhemchugova, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhong, L., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Zweber, P.
Published: 2011

18. First observation of the decays χcJ→π0π0π0π0

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., Z. H., An, Bai, J. Z., Ban, Y., Berger, N., Bian, J. M., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, L. P., Chen, M. L., Chen, P., Chen, S. J., Chen, Y. B., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Duan, M. Y., Fang, J., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, Grishin, S., Y. T., Gu, Guo, A. Q., Guo, L. B., Guo, Y. P., Han, S. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., X. W., Hu, Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jin, D. P., Jin, S., Komamiya, S., Kuehn, W., Lange, S., Leung, J. K. C., Li, C., D. M., Li, Li, F., Li, G., H. B., Li, Li, J., J. C., Li, Li, L., Q. J., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Y. X., Li, Z. B., Li, Liang, H., Liang, T. R., Liang, Y. T., Liang, Y. F., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, F., Liu, G. C., Liu, H., Liu, H. B., Liu, H. M., Liu, H. W., Liu, J., Liu, J. P., Liu, K., Liu, K. Y., Liu, Q., Liu, S. B., Liu, X. H., Liu, Y. B., Liu, Y. F., Liu, Y. W., Liu, Y., Liu, Z. A., G. R., Lu, J. G., Lü, Q. W., Lü, X. R., Lü, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, X., X. Y., Ma, Maggiora, Marco, Mao, Y. J., Mao, Z. P., Min, J., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Ning, F. P., Olsen, S. L., Ouyang, Q., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qiu, J. F., Rong, G., Ruan, X. D., Sarantsev, A., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Sonoda, S., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, B. Q., Wang, J. K., Wang, K., Wang, L. L., Wang, L. S., Wang, P., Wang, P. L., Wang, Q., Wang, S. G., Wang, X. D., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Y. M., Wu, Wu, Z., Xiao, Z. J., Xie, Y. G., G. F., Xu, G. M., Xu, Xu, H., Xu, M., X. P., Xu, Xu, Y., Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, P., Yang, S. M., Yang, Y. X., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, Yu, L., Yuan, C. Z., Yuan, Y., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, L., Zhang, S. H., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Z. P., Zhao, C., Zhao, H. S., Zhao, J. W., Zhao, L., Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, Z. L., Zhu, C., Zhu, K., Zhu, K. J., Zhu, Q. M., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Zweber, P.
Published: 2011

19. Study of a00(980)-f0(980) mixing

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., Z. H., An, Bai, J. Z., Baldini, R., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chen, G. Chelkov G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Duan, M. Y., Fan, R. R., Fang, J., Fang, S. S., Feldbauer, F., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, Grishin, S., M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kavatsyuk, M., Komamiya, S., Kuehn, W., Lange, J. S., Leung, J. K. C., Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, 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., Yong, Liu, Liu, Z. A., Liu, Z. Q., Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, T., Ma, X., X. Y., Ma, Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Mitchell, R. E., X. H., Mo, Motzko, C., Muchnoi, N. Y. u., Nefedov, Y., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Schulze, A. Sarantsev J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Sonoda, S., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, 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., Wei, D. H., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., G. F., Xu, G. M., Xu, Xu, H., Xu, Y., Z. R., Xu, Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, T., Yang, Y., Yang, Y. X., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, Yu, L., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, G., Zhao, H. S., Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhao, Z. L., Zheng, A. Zhemchugov B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhong, L., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Zweber, P.
Published: 2011

20. Observation of chi(cJ) decaying into the p(p)over-barK(+)K(-) final state

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

21. Higher-order multipole amplitude measurement in psi ' -> gamma chi(c2)

Author: Ablikim, M., Achasov, M. N., Alberto, D., F. F., An, An, Q., Z. H., An, Bai, J. Z., Baldini, R., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Fang, J., Fang, S. S., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., C. H., Li, Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., H. B., Li, J. C., Li, Li, K., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, 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., Yong, Liu, Liu, Z. A., Zhiqiang, Liu, Zhiqing, Liu, Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, S., Ma, T., Ma, X., X. Y., Ma, Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tian, H. L., Toth, D., Varner, G. S., Wang, 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. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., G. F., Xu, G. M., Xu, Xu, H., Q. J., Xu, X. P., Xu, Xu, Y., Z. R., Xu, Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, S. P., Yu, Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., 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., Zhao, G., Zhao, H. S., Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhao, Z. L., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhong, L., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Published: 2011

22. eta pi(+)pi(-) Resonant Structure around 1.8 GeV/c(2) and eta(1405) in J/psi -> omega eta pi(+)pi(-)

Author: Ablikim, M., Achasov, M. N., Alberto, D., F. F., An, An, Q., Z. H., An, Bai, J. Z., Baldini, R., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Fang, J., Fang, S. S., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar Nayestanaki, N., Kavatsyuk, M., Kuehn, W., Lai, W., Lange, J. S., Leung, J. K. C., C. H., Li, Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., H. B., Li, J. C., Li, Li, K., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, 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., Yong, Liu, Liu, Z. A., Zhiqiang, Liu, Zhiqing, Liu, Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, S., Ma, T., Ma, X., X. Y., Ma, Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Min, T. J., Mitchell, R. E., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tian, H. L., Toth, D., Varner, G. S., Wang, 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. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., G. F., Xu, G. M., Xu, Xu, H., Q. J., Xu, X. P., Xu, Xu, Y., Z. R., Xu, Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, S. P., Yu, Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J., 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., Zhao, G., Zhao, H. S., Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhao, Z. L., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhong, L., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Published: 2011

23. Search for CP and P violating pseudoscalar decays into pi pi

Author: Ablikim, M., Achasov, M. N., Alberto, D., An, Q., Z. H., An, Bai, J. Z., Baldini, R., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A. C., Cao, G. F., Cao, X. X., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Fan, R. R., Fang, J., Fang, S. S., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, Grishin, S., M. H., Gu, Y. T., Gu, Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Hao, X. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar Nayestanaki, N., Kavatsyuk, M., Komamiya, S., Kuehn, W., Lange, J. S., Leung, J. K. C., Cheng, Li, Cui, Li, D. M., Li, Li, F., Li, G., 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, Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Fang, Liu, Feng, Liu, 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., Yong, Liu, Liu, Z. A., Liu, Z. Q., Loehner, H., G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, T., Ma, X., X. Y., Ma, Maggiora, Marco, Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Messchendorp, J. G., Min, J., Mitchell, R. E., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Sonoda, S., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, 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., Wei, D. H., Wen, Q. G., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Wu, W., Wu, Z., Xiao, Z. J., Xie, Y. G., G. F., Xu, G. M., Xu, Xu, H., Xu, Y., Z. R., Xu, Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, T., Yang, Y., Yang, Y. X., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, Yu, L., Yu Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, G., Zhao, H. S., Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhao, Z. L., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhong, L., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., and Zuo, J. X.
Published: 2011

24. Observation of a ppbar mass threshold enhancement in Ψ' → π+π− J/Ψ(J/Ψ → γ p pbar) decay

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., Z. H., An, Bai, J. Z., Ban, Y., Berger, N., Bian, J. M., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, L. P., Chen, M. L., Chen, P., Chen, S. J., Chen, Y. B., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Duan, M. Y., Fang, J., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, Grishin, S., Y. T., Gu, Guo, A. Q., Guo, L. B., Guo, Y. P., Han, S. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., X. W., Hu, Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jin, D. P., Jin, S., Komamiya, S., Kuehn, W., Lange, S., Leung, J. K. C., Li, C., D. M., Li, Li, F., Li, G., H. B., Li, Li, J., J. C., Li, Li, L., Q. J., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Y. X., Li, Z. B., Li, Liang, H., Liang, T. R., Liang, Y. T., Liang, Y. F., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, F., Liu, G. C., Liu, H., Liu, H. B., Liu, H. M., Liu, H. W., Liu, J., Liu, J. P., Liu, K., Liu, K. Y., Liu, Q., Liu, S. B., Liu, X. H., Liu, Y. B., Liu, Y. F., Liu, Y. W., Liu, Y., Liu, Z. A., G. R., Lu, J. G., Lü, Q. W., Lü, X. R., Lü, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, X., X. Y., Ma, Maggiora, Marco, Mao, Y. J., Mao, Z. P., Min, J., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Ning, F. P., Olsen, S. L., Ouyang, Q., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qiu, J. F., Rong, G., Ruan, X. D., Sarantsev, A., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Sonoda, S., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, B. Q., Wang, J. K., Wang, K., Wang, L. L., Wang, L. S., Wang, P., Wang, P. L., Wang, Q., Wang, S. G., Wang, X. D., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Y. M., Wu, Wu, Z., Xiao, Z. J., Xie, Y. G., G. F., Xu, G. M., Xu, Xu, H., Xu, M., X. P., Xu, Xu, Y., Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, P., Yang, S. M., Yang, Y. X., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, Yu, L., Yuan, C. Z., Yuan, Y., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, L., Zhang, S. H., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Z. P., Zhao, C., Zhao, H. S., Zhao, J. W., Zhao, L., Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, Z. L., Zhu, C., Zhu, K., Zhu, K. J., Zhu, Q. M., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Zweber, P.
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, p(p)over-bar, Meson, Electron–positron annihilation, Astronomy and Astrophysics, Invariant mass, Atomic physics, Instrumentation, Resonance (particle physics), threshold enhancement
Abstract: The decay channel Ψ' → π+π− J/Ψ(J/Ψ → γp) is studied using a sample of 1.06 × 108 Ψ' events collected by the BESIII experiment at BEPCII. A strong enhancement at threshold is observed in the p invariant mass spectrum. The enhancement can be fitted with an S-wave Breit–Wigner resonance function with a resulting peak mass of M = 1861+6−13 (stat)+7−26 (syst) MeV/c2 and a narrow width that is Γ < 38 MeV/c2 at the 90% confidence level. These results are consistent with published BESII results. These mass and width values do not match with well established mesons.
Published: 2010

25. NEW PHYSICS OPPORTUNITIES IN THE CHARM/TAU REGION:THE BESIII — EXPERIMENT IN BEIJING

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., Z. H., An, Bai, J. Z., Ban, Y., Berger, N., Bian, J. M., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, L. P., Chen, M. L., Chen, P., Chen, S. J., Chen, Y. B., Chu, Y. P., Cronin Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, MARCO GIOVANNI, Ding, Y., Dong, L. Y., Dong, M. Y., S. X., Du, Duan, M. Y., Fang, J., Feng, C. Q., C. D., Fu, J. L., Fu, Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, Michela, Grishin, S., Y. T., Gu, Guo, A. Q., Guo, L. B., Guo, Y. P., Han, S. Q., Harris, F. A., K. L., He, He, M., Z. Y., He, Heng, Y. K., Hou, Z. L., H. M., Hu, J. F., Hu, Hu, T., X. W., Hu, Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., C. S., Ji, Ji, Q., X. B., Ji, X. L., Ji, Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jin, D. P., Jin, S., Komamiya, S., Kuehn, W., Lange, S., Leung, J. K. C., Li, C., D. M., Li, Li, F., Li, G., H. B., Li, Li, J., J. C., Li, Li, L., Q. J., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Y. X., Li, Z. B., Li, Liang, H., Liang, T. R., Liang, Y. T., Liang, Y. F., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, F., Liu, G. C., Liu, H., Liu, H. B., Liu, H. M., Liu, H. W., Liu, J., Liu, J. P., Liu, K., Liu, K. Y., Liu, Q., Liu, S. B., Liu, X. H., Liu, Y. B., Liu, Y. F., Liu, Y. W., Liu, Y., Liu, Z. A., G. R., Lu, J. G., Lü, Q. W., Lü, X. R., Lü, Y. P., Lu, Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, Ma, X., X. Y., Ma, Maggiora, Marco, Mao, Y. J., Mao, Z. P., Min, J., X. H., Mo, Muchnoi, N. Y. u., Nefedov, Y., Ning, F. P., Olsen, S. L., Ouyang, Q., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qiu, J. F., Rong, G., Ruan, X. D., Sarantsev, A., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Sonoda, S., Spataro, STEFANO GIOVANNI, Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, B. Q., Wang, J. K., Wang, K., Wang, L. L., Wang, L. S., Wang, P., Wang, P. L., Wang, Q., Wang, S. G., Wang, X. D., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Wen, S. P., Wiedner, U., L. H., Wu, Wu, N., Y. M., Wu, Wu, Z., Xiao, Z. J., Xie, Y. G., G. F., Xu, G. M., Xu, Xu, H., Xu, M., X. P., Xu, Xu, Y., Z. Z., Xu, Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, P., Yang, S. M., Yang, Y. X., Ye, M., M. H., Ye, B. X., Yu, C. X., Yu, Yu, L., Yuan, C. Z., Yuan, Y., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, L., Zhang, S. H., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Z. P., Zhao, C., Zhao, H. S., Zhao, J. W., Zhao, L., Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, Z. L., Zhu, C., Zhu, K., Zhu, K. J., Zhu, Q. M., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Zweber, P.
Published: 2010

26. Branching fraction measurements of χc0 and χc2 to π0π0 and ηη

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

27. Precision measurement of the branching fractions of J/psi -> pi(+)pi(-)pi(0) and psi ' -> pi(+)pi(-)pi(0)

Author: Bondarenko, O., Chen, J. C., Chen, M. L., Dai, J. P., Gao, Y., Huang, J. S., Huang, X. T., Jia, L. K., Jin, S., Kalantar-Nayestanaki, N., Kavatsyuk, M., Lange, J. S., Li, F., Li, G., Li, H. B., Li, N. B., Li, S. L., Liang, H., Liang, Y. T., Liao, G. R., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, K., Liu, K. Y., Loehner, H., Lu, J. G., Luo, X. L., Ma, C. L., Messchendorp, J. G., Park, J. W., Sun, J. F., Sun, X. D., Sun, Z. J., Sun, Z. T., Tang, C. J., Tian, H. L., Wang, B., Wang, B. Q., Wang, Z. Y., Wu, L. H., Xu, H., Xu, Q. J., Xu, Y., Yuan, W. L., Yuan, Y., Zhang, J., Zhao, Lei, Zhao, S. J., Zhao, T. C., Zhou, X. R., Zhu, Y. S., Bondarenko, O., Chen, J. C., Chen, M. L., Dai, J. P., Gao, Y., Huang, J. S., Huang, X. T., Jia, L. K., Jin, S., Kalantar-Nayestanaki, N., Kavatsyuk, M., Lange, J. S., Li, F., Li, G., Li, H. B., Li, N. B., Li, S. L., Liang, H., Liang, Y. T., Liao, G. R., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, K., Liu, K. Y., Loehner, H., Lu, J. G., Luo, X. L., Ma, C. L., Messchendorp, J. G., Park, J. W., Sun, J. F., Sun, X. D., Sun, Z. J., Sun, Z. T., Tang, C. J., Tian, H. L., Wang, B., Wang, B. Q., Wang, Z. Y., Wu, L. H., Xu, H., Xu, Q. J., Xu, Y., Yuan, W. L., Yuan, Y., Zhang, J., Zhao, Lei, Zhao, S. J., Zhao, T. C., Zhou, X. R., and Zhu, Y. S.
Abstract: We study the decays of the J/psi and psi' mesons to pi(+)pi(-)pi(0) using data samples at both resonances collected with the BES III detector in 2009. We measure the corresponding branching fractions with unprecedented precision and provide mass spectra and Dalitz plots. The branching fraction for J/psi -> pi(+)pi(-)pi(0) is determined to be(2.137 +/- 0.004 (stat.)(-0.056)(+0.058) (syst.)(-0.026)(+0.027) (norm.)) x 10(-2),and the branching fraction for psi' -> pi(+)pi(-)pi(0) is measured as(2.14 +/- 0.03 (stat.)(-0.07)(+0.08) (syst.)(-0.08)(+0.09) (norm)) x 10(-4).The J/psi decay is found to be dominated by an intermediate rho(770) state, whereas the psi' decay is dominated by di-pion masses around 2.2 GeV/c(2), leading to strikingly different Dalitz distributions. (C) 2012 Elsevier B.V. All rights reserved.
Published: 2012

28. Determination of the number of J/ψ events with J/ψ → inclusive decays

Author: Ablikim, M., primary, Achasov, M. N., additional, Ambrose, D. J., additional, An, F. F., additional, An, Q., additional, An, Z. H., additional, Bai, J. Z., additional, Ban, Y., additional, Becker, J., additional, Berger, N., additional, Bertani, M., additional, Bian, J. M., additional, Boger, E., additional, Bondarenko, O., additional, Boyko, I., additional, Briere, R. A., additional, Bytev, V., additional, Cai, X., additional, Calcaterra, A., additional, Cao, G. F., additional, Chang, J. F., additional, Chelkov, G., additional, Chen, G., additional, Chen, H. S., additional, Chen, J. C., additional, Chen, M. L., additional, Chen, S. J., additional, Chen, Y., additional, Chen, Y. B., additional, Cheng, H. P., additional, Chu, Y. P., additional, Cronin-Hennessy, D., additional, Dai, H. L., additional, Dai, J. P., additional, Dedovich, D., additional, Deng, Z. Y., additional, Denig, A., additional, Denysenko, I., additional, Destefanis, M., additional, Ding, W. M., additional, Ding, Y., additional, Dong, L. Y., additional, Dong, M. Y., additional, Du, S. X., additional, Fang, J., additional, Fang, S. S., additional, Fava, L., additional, Feldbauer, F., additional, Feng, C. Q., additional, Ferroli, R. B., additional, Fu, C. D., additional, Fu, J. L., additional, Gao, Y., additional, Geng, C., additional, Goetzen, K., additional, Gong, W. X., additional, Gradl, W., additional, Greco, M., additional, Gu, M. H., additional, Gu, Y. T., additional, Guan, Y. H., additional, Guo, A. Q., additional, Guo, L. B., additional, Guo, Y.P., additional, Han, Y. L., additional, Hao, X. Q., additional, Harris, F. A., additional, He, K. L., additional, He, M., additional, He, Z. Y., additional, Heng, Y. K., additional, Held, T., additional, Hou, Z. L., additional, Hu, H. M., additional, Hu, J. F., additional, Hu, T., additional, Huang, B., additional, Huang, G. M., additional, Huang, J. S., additional, Huang, X. T., additional, Huang, Y. P., additional, Hussain, T., additional, Ji, C. S., additional, Ji, Q., additional, Ji, X. B., additional, Ji, X. L., additional, Jia, L. K., additional, Jiang, L. L., additional, Jiang, X. S., additional, Jiao, J. B., additional, Jiao, Z., additional, Jin, D. P., additional, Jin, S., additional, Jing, F. F., additional, Kalantar-Nayestanaki, N., additional, Kavatsyuk, M., additional, Kuehn, W., additional, Lai, W., additional, Lange, J. S., additional, Leung, J. K. C., additional, Li, C. H., additional, Li, Cheng, additional, Li, Cui, additional, Li, D. M., additional, Li, F., additional, Li, G., additional, Li, H. B., additional, Li, J. C., additional, Li, K., additional, Li, Lei, additional, Li, N. B., additional, Li, Q. J., additional, Li, S. L., additional, Li, W. D., additional, Li, W. G., additional, Li, X. L., additional, Li, X. N., additional, Li, X. Q., additional, Li, X. R., additional, Li, Z. B., additional, Liang, H., additional, Liang, Y. F., additional, Liang, Y. T., additional, Liao, G. R., additional, Liao, X. T., additional, Liu, B. J., additional, Liu, C. L., additional, Liu, C. X., additional, Liu, C. Y., additional, Liu, F. H., additional, Liu, Fang, additional, Liu, Feng, additional, Liu, H., additional, Liu, H. B., additional, Liu, H. H., additional, Liu, H. M., additional, Liu, H. W., additional, Liu, J. P., additional, Liu, K. Y., additional, Liu, Kai, additional, Liu, Kun, additional, Liu, P. L., additional, Liu, S. B., additional, Liu, X., additional, Liu, X. H., additional, Liu, Y., additional, Liu, Y. B., additional, Liu, Z. A., additional, Liu, Zhiqiang, additional, Liu, Zhiqing, additional, Loehner, H., additional, Lu, G. R., additional, Lu, H. J., additional, Lu, J. G., additional, Lu, Q. W., additional, Lu, X. R., additional, Lu, Y. P., additional, Luo, C. L., additional, Luo, M. X., additional, Luo, T., additional, Luo, X. L., additional, Lu, M., additional, Ma, C. L., additional, Ma, F. C., additional, Ma, H. L., additional, Ma, Q. M., additional, Ma, S., additional, Ma, T., additional, Ma, X. Y., additional, Ma, Y., additional, Maas, F. E., additional, Maggiora, M., additional, Malik, Q. A., additional, Mao, H., additional, Mao, Y. J., additional, Mao, Z. P., additional, Messchendorp, J. G., additional, Min, J., additional, Min, T. J., additional, Mitchell, R. E., additional, Mo, X. H., additional, Morales, C. Morales, additional, Motzko, C., additional, Muchnoi, N. Yu., additional, Nefedov, Y., additional, Nicholson, C., additional, Nikolaev, I. B., additional, Ning, Z., additional, Olsen, S. L., additional, Ouyang, Q., additional, Pacetti, S., additional, Park, J. W., additional, Pelizaeus, M., additional, Peng, H. P., additional, Peters, K., additional, Ping, J. L., additional, Ping, R. G., additional, Poling, R., additional, Prencipe, E., additional, Pun, C. S. J., additional, Qi, M., additional, Qian, S., additional, Qiao, C. F., additional, Qin, X. S., additional, Qin, Y., additional, Qin, Z. H., additional, Qiu, J. F., additional, Rashid, K. H., additional, Rong, G., additional, Ruan, X. D., additional, Sarantsev, A., additional, Schaefer, B. D., additional, Schulze, J., additional, Shao, M., additional, Shen, C. P., additional, Shen, X. Y., additional, Sheng, H. Y., additional, Shepherd, M. R., additional, Song, X. Y., additional, Spataro, S., additional, Spruck, B., additional, Sun, D. H., additional, Sun, G. X., additional, Sun, J. F., additional, Sun, S. S., additional, Sun, X. D., additional, Sun, Y. J., additional, Sun, Y. Z., additional, Sun, Z. J., additional, Sun, Z. T., additional, Tang, C. J., additional, Tang, X., additional, Thorndike, E. H., additional, Tian, H. L., additional, Toth, D., additional, Ullrich, M., additional, Varner, G. S., additional, Wang, B., additional, Wang, B. Q., additional, Wang, K., additional, Wang, L. L., additional, Wang, L. S., additional, Wang, M., additional, Wang, P., additional, Wang, P. L., additional, Wang, Q., additional, Wang, Q. J., additional, Wang, S. G., additional, Wang, X. F., additional, Wang, X. L., additional, Wang, Y. D., additional, Wang, Y. F., additional, Wang, Y. Q., additional, Wang, Z., additional, Wang, Z. G., additional, Wang, Z. Y., additional, Wei, D. H., additional, Weidenkaff, P., additional, Wen, Q. G., additional, Wen, S. P., additional, Werner, M., additional, Wiedner, U., additional, Wu, L. H., additional, Wu, N., additional, Wu, S. X., additional, Wu, W., additional, Wu, Z., additional, Xia, L. G., additional, Xiao, Z. J., additional, Xie, Y. G., additional, Xiu, Q. L., additional, Xu, G. F., additional, Xu, G. M., additional, Xu, H., additional, Xu, Q. J., additional, Xu, X. P., additional, Xu, Y., additional, Xu, Z. R., additional, Xue, F., additional, Xue, Z., additional, Yan, L., additional, Yan, W. B., additional, Yan, Y. H., additional, Yang, H. X., additional, Yang, T., additional, Yang, Y., additional, Yang, Y. X., additional, Ye, H., additional, Ye, M., additional, Ye, M. H., additional, Yu, B. X., additional, Yu, C. X., additional, Yu, J. S., additional, Yu, S. P., additional, Yuan, C. Z., additional, Yuan, W. L., additional, Yuan, Y., additional, Zafar, A. A., additional, Zallo, A., additional, Zeng, Y., additional, Zhang, B. X., additional, Zhang, B. Y., additional, Zhang, C. C., additional, Zhang, D. H., additional, Zhang, H. H., additional, Zhang, H. Y., additional, Zhang, J., additional, Zhang, J. G., additional, Zhang, J. Q., additional, Zhang, J. W., additional, Zhang, J. Y., additional, Zhang, J. Z., additional, Zhang, L., additional, Zhang, S. H., additional, Zhang, T. R., additional, Zhang, X. J., additional, Zhang, X. Y., additional, Zhang, Y., additional, Zhang, Y. H., additional, Zhang, Y. S., additional, Zhang, Z. P., additional, Zhang, Z. Y., additional, Zhao, G., additional, Zhao, H. S., additional, Zhao, J. W., additional, Zhao, K. X., additional, Zhao, Lei, additional, Zhao, Ling, additional, Zhao, M. G., additional, Zhao, Q., additional, Zhao, S. J., additional, Zhao, T. C., additional, Zhao, X. H., additional, Zhao, Y. B., additional, Zhao, Z. G., additional, Zheng, J. P., additional, Zhemchugov, A., additional, Zheng, Y. H., additional, Zheng, Z. P., additional, Zhong, B., additional, Zhong, J., additional, Zhou, L., additional, Zhou, X. K., additional, Zhou, X. R., additional, Zhu, C., additional, Zhu, K., additional, Zhu, K. J., additional, Zhu, S. H., additional, Zhu, X. L., additional, Zhu, X. W., additional, Zhu, Y. M., additional, Zhu, Y. S., additional, Zhu, Z. A., additional, Zhuang, J., additional, Zou, B. S., additional, Zou, J. H., additional, and Zuo, J. X., additional
Published: 2012
Full Text: View/download PDF

29. Evidence forψ′Decays intoγπ0andγη

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

30. Measurements ofhc(P11)inψ′Decays

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

31. Branching fraction measurements ofχc0andχc2toπ0π0andηη

Author: Ablikim, M., primary, Achasov, M. N., additional, An, L., additional, An, Q., additional, An, Z. H., additional, Bai, J. Z., additional, Ban, Y., additional, Berger, N., additional, Bian, J. M., additional, Boyko, I., additional, Briere, R. A., additional, Bytev, V., additional, Cai, X., additional, Cao, G. F., additional, Cao, X. X., additional, Chang, J. F., additional, Chelkov, G., additional, Chen, G., additional, Chen, H. S., additional, Chen, J. C., additional, Chen, L. P., additional, Chen, M. L., additional, Chen, P., additional, Chen, S. J., additional, Chen, Y. B., additional, Chu, Y. P., additional, Cronin-Hennessy, D., additional, Dai, H. L., additional, Dai, J. P., additional, Dedovich, D., additional, Deng, Z. Y., additional, Denysenko, I., additional, Destefanis, M., additional, Ding, Y., additional, Dong, L. Y., additional, Dong, M. Y., additional, Du, S. X., additional, Duan, M. Y., additional, Fang, J., additional, Feng, C. Q., additional, Fu, C. D., additional, Fu, J. L., additional, Gao, Y., additional, Geng, C., additional, Goetzen, K., additional, Gong, W. X., additional, Greco, M., additional, Grishin, S., additional, Gu, Y. T., additional, Guo, A. Q., additional, Guo, L. B., additional, Guo, Y. P., additional, Han, S. Q., additional, Harris, F. A., additional, He, K. L., additional, He, M., additional, He, Z. Y., additional, Heng, Y. K., additional, Hou, Z. L., additional, Hu, H. M., additional, Hu, J. F., additional, Hu, T., additional, Hu, X. W., additional, Huang, B., additional, Huang, G. M., additional, Huang, J. S., additional, Huang, X. T., additional, Huang, Y. P., additional, Ji, C. S., additional, Ji, Q., additional, Ji, X. B., additional, Ji, X. L., additional, Jia, L. K., additional, Jiang, L. L., additional, Jiang, X. S., additional, Jiao, J. B., additional, Jin, D. P., additional, Jin, S., additional, Komamiya, S., additional, Kuehn, W., additional, Lange, S., additional, Leung, J. K. C., additional, Li, Cheng, additional, Li, Cui, additional, Li, D. M., additional, Li, F., additional, Li, G., additional, Li, H. B., additional, Li, J., additional, Li, J. C., additional, Li, Lei, additional, Li, Lu, additional, Li, Q. J., additional, Li, W. D., additional, Li, W. G., additional, Li, X. L., additional, Li, X. N., additional, Li, X. Q., additional, Li, X. R., additional, Li, Y. X., additional, Li, Z. B., additional, Liang, H., additional, Liang, T. R., additional, Liang, Y. T., additional, Liang, Y. F., additional, Liao, G. R, additional, Liao, X. T., additional, Liu, B. J., additional, Liu, C. L., additional, Liu, C. X., additional, Liu, C. Y., additional, Liu, F. H., additional, Liu, Fang, additional, Liu, Feng, additional, Liu, G. C., additional, Liu, H., additional, Liu, H. B., additional, Liu, H. M., additional, Liu, H. W., additional, Liu, J., additional, Liu, J. P., additional, Liu, K., additional, Liu, K. Y, additional, Liu, Q., additional, Liu, S. B., additional, Liu, X. H., additional, Liu, Y. B., additional, Liu, Y. F., additional, Liu, Y. W., additional, Liu, Yong, additional, Liu, Z. A., additional, Lu, G. R., additional, Lu, J. G., additional, Lu, Q. W., additional, Lu, X. R., additional, Lu, Y. P., additional, Luo, C. L., additional, Luo, M. X., additional, Luo, T., additional, Luo, X. L., additional, Ma, C. L., additional, Ma, F. C., additional, Ma, H. L., additional, Ma, Q. M., additional, Ma, X., additional, Ma, X. Y., additional, Maggiora, M., additional, Mao, Y. J., additional, Mao, Z. P., additional, Min, J., additional, Mo, X. H., additional, Muchnoi, N. Yu., additional, Nefedov, Y., additional, Ning, F. P., additional, Olsen, S. L., additional, Ouyang, Q., additional, Pelizaeus, M., additional, Peters, K., additional, Ping, J. L., additional, Ping, R. G., additional, Poling, R., additional, Pun, C. S. J., additional, Qi, M., additional, Qian, S., additional, Qiao, C. F., additional, Qiu, J. F., additional, Rong, G., additional, Ruan, X. D., additional, Sarantsev, A., additional, Shao, M., additional, Shen, C. P., additional, Shen, X. Y., additional, Sheng, H. Y., additional, Sonoda, S., additional, Spataro, S., additional, Spruck, B., additional, Sun, D. H., additional, Sun, G. X., additional, Sun, J. F., additional, Sun, S. S., additional, Sun, X. D., additional, Sun, Y. J., additional, Sun, Y. Z., additional, Sun, Z. J., additional, Sun, Z. T., additional, Tang, C. J., additional, Tang, X., additional, Tang, X. F., additional, Tian, H. L., additional, Toth, D., additional, Varner, G. S., additional, Wan, X., additional, Wang, B. Q., additional, Wang, J. K., additional, Wang, K., additional, Wang, L. L., additional, Wang, L. S., additional, Wang, P., additional, Wang, P. L., additional, Wang, Q., additional, Wang, S. G., additional, Wang, X. D., additional, Wang, X. L., additional, Wang, Y. D., additional, Wang, Y. F., additional, Wang, Y. Q., additional, Wang, Z., additional, Wang, Z. G., additional, Wang, Z. Y., additional, Wei, D. H., additional, Wen, S. P., additional, Wiedner, U., additional, Wu, L. H., additional, Wu, N., additional, Wu, W., additional, Wu, Y. M., additional, Wu, Z., additional, Xiao, Z. J., additional, Xie, Y. G., additional, Xu, G. F., additional, Xu, G. M., additional, Xu, H., additional, Xu, Min, additional, Xu, Ming, additional, Xu, X. P., additional, Xu, Y., additional, Xu, Z. Z., additional, Xue, Z., additional, Yan, L., additional, Yan, W. B., additional, Yan, Y. H., additional, Yang, H. X., additional, Yang, M., additional, Yang, P., additional, Yang, S. M., additional, Yang, Y. X., additional, Ye, M., additional, Ye, M. H., additional, Yu, B. X., additional, Yu, C. X., additional, Yu, L., additional, Yuan, C. Z., additional, Yuan, Y., additional, Zeng, Y., additional, Zhang, B. X., additional, Zhang, B. Y., additional, Zhang, C. C., additional, Zhang, D. H., additional, Zhang, H. H., additional, Zhang, H. Y., additional, Zhang, J. W., additional, Zhang, J. Y., additional, Zhang, J. Z., additional, Zhang, L., additional, Zhang, S. H., additional, Zhang, X. Y., additional, Zhang, Y., additional, Zhang, Y. H., additional, Zhang, Z. P., additional, Zhao, C., additional, Zhao, H. S., additional, Zhao, Jiawei, additional, Zhao, Jingwei, additional, Zhao, Lei, additional, Zhao, Ling, additional, Zhao, M. G., additional, Zhao, Q., additional, Zhao, S. J., additional, Zhao, T. C., additional, Zhao, X. H., additional, Zhao, Y. B., additional, Zhao, Z. G., additional, Zhemchugov, A., additional, Zheng, B., additional, Zheng, J. P., additional, Zheng, Y. H., additional, Zheng, Z. P., additional, Zhong, B., additional, Zhong, J., additional, Zhou, L., additional, Zhou, Z. L., additional, Zhu, C., additional, Zhu, K., additional, Zhu, K. J., additional, Zhu, Q. M., additional, Zhu, X. W., additional, Zhu, Y. S., additional, Zhu, Z. A., additional, Zhuang, J., additional, Zou, B. S., additional, Zou, J. H., additional, Zuo, J. X., additional, and Zweber, P., additional
Published: 2010
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32. Observation of a $p\bar{p}$ mass threshoud enhancement in $\psi^\prime\to\pi^+\pi^-J/\psi(J/\psi\to\gamma p\bar{p})$ decay

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

33. Observation of a p(p)over-bar mass threshold enhancement in psi ' -> pi(+)pi(-)J/psi(J/psi -> gamma p(p)over-bar) decay

Author: Ablikim, M., Achasov, M. N., An, L., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Berger, N., Bian, J. M., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Cao, G. F., Cao, X. X., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, L. P., Chen, M. L., Chen, P., Chen, S. J., Chen, Y. B., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denysenko, I., Destefanis, M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Duan, M. Y., Fang, J., Feng, C. Q., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Greco, M., Grishin, S., Gu, Y. T., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, S. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Hu, X. W., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jin, D. P., Jin, S., Komamiya, S., Kuehn, W., Lange, S., Leung, J. K. C., Li, C., Li, D. M., Li, F., Li, G., Li, H. B., Li, J., Li, J. C., Li, L., Li, Q. J., Li, W. D., Li, W. G., Li, X. L., Li, X. N., Li, X. Q., Li, X. R., Li, Y. X., Li, Z. B., Liang, H., Liang, T. R., Liang, Y. T., Liang, Y. F., Liao, G. R., Liao, X. T., Liu, B. J., Liu, C. L., Liu, C. X., Liu, C. Y., Liu, F. H., Liu, F., Liu, G. C., Liu, H., Liu, H. B., Liu, H. M., Liu, H. W., Liu, J., Liu, J. P., Liu, K., Liu, K. Y., Liu, Q., Liu, S. B., Liu, X. H., Liu, Y. B., Liu, Y. F., Liu, Y. W., Liu, Y., Liu, Z. A., Lu, G. R., Lue, J. G., Lue, Q. W., Lue, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, X., Ma, X. Y., Maggiora, M., Mao, Y. J., Mao, Z. P., Min, J., Mo, X. H., Muchnoi, N. Yu, Nefedov, Y., Ning, F. P., Olsen, S. L., Ouyang, Q., Pelizacus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qiu, J. F., Rong, G., Ruan, X. D., Sarantsev, A., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Sonoda, S., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Tang, X. F., Tian, H. L., Toth, D., Varner, G. S., Wan, X., Wang, B. Q., Wang, J. K., Wang, K., Wang, L. L., Wang, L. S., Wang, P., Wang, P. L., Wang, Q., Wang, S. G., Wang, X. D., Wang, X. L., Wang, Y. D., Wang, Y. F., Wang, Y. Q., Wang, Z., Wang, Z. G., Wang, Z. Y., Wei, D. H., Wen, S. P., Ulrich Wiedner, Wu, L. H., Wu, N., Wu, Y. M., Wu, Z., Xiao, Z. J., Xie, Y. G., Xu, G. F., Xu, G. M., Xu, H., Xu, M., Xu, X. P., Xu, Y., Xu, Z. Z., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, M., Yang, P., Yang, S. M., Yang, Y. X., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, L., Yuan, C. Z., Yuan, Y., Zeng, Y., Zhang, B. X., Zhang, B. Y., Zhang, C. C., Zhang, D. H., Zhang, H. H., Zhang, H. Y., Zhang, J. W., Zhang, J. Y., Zhang, J. Z., Zhang, L., Zhang, S. H., Zhang, X. Y., Zhang, Y., Zhang, Y. H., Zhang, Z. P., Zhao, C., Zhao, H. S., Zhao, J. W., Zhao, L., Zhao, M. G., Zhao, Q., Zhao, S. J., Zhao, T. C., Zhao, X. H., Zhao, Y. B., Zhao, Z. G., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, Z. L., Zhu, C., Zhu, K., Zhu, K. J., Zhu, Q. M., Zhu, X. W., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., Zweber, P., and Besiii, Collaboration

34. Observation of chi(c1) decays into vector meson pairs phiphi, omegaomega, and omegaphi

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

35. etapi+ pi- resonant structure around 1.8 GeV/c(2) and eta(1405) in J/psi omegaetapi+ pi

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

36. Observation of two new N* resonances in the decay psi(3686)pppi0

Author: Ablikim, M., Achasov, M. N., Ambrose, D. J., An, F. F., An, Q., An, Z. H., Bai, J. Z., Ban, Y., Becker, J., Berger, N., Bertani, M., Bian, J. M., Boger, E., Bondarenko, O., Boyko, I., Briere, R. A., Bytev, V., Cai, X., Calcaterra, A., Cao, G. F., Chang, J. F., Chelkov, G., Chen, G., Chen, H. S., Chen, J. C., Chen, M. L., Chen, S. J., Chen, Y., Chen, Y. B., Cheng, H. P., Chu, Y. P., Cronin-Hennessy, D., Dai, H. L., Dai, J. P., Dedovich, D., Deng, Z. Y., Denig, A., Denysenko, I., Destefanis, M., Ding, W. M., Ding, Y., Dong, L. Y., Dong, M. Y., Du, S. X., Fang, J., Fang, S. S., Fava, L., Feldbauer, F., Feng, C. Q., Ferroli, R. B., Fu, C. D., Fu, J. L., Gao, Y., Geng, C., Goetzen, K., Gong, W. X., Gradl, W., Greco, M., Gu, M. H., Gu, Y. T., Guan, Y. H., Guo, A. Q., Guo, L. B., Guo, Y. P., Han, Y. L., Hao, X. Q., Harris, F. A., He, K. L., He, M., He, Z. Y., Held, T., Heng, Y. K., Hou, Z. L., Hu, H. M., Hu, J. F., Hu, T., Huang, B., Huang, G. M., Huang, J. S., Huang, X. T., Huang, Y. P., Hussain, T., Ji, C. S., Ji, Q., Ji, X. B., Ji, X. L., Jia, L. K., Jiang, L. L., Jiang, X. S., Jiao, J. B., Jiao, Z., Jin, D. P., Jin, S., Jing, F. F., Kalantar-Nayestanaki, N., Kavatsyuk, M., Kuhn, W., Lai, W., Lange, J. S., Leung, J. K. C., Li, 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., Liang, H., Liang, Y. F., Liang, Y. T., Liao, G. R., Liao, X. T., Liu, 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, Loehner, H., Lu, G. R., Lu, H. J., Lu, J. G., Lu, Q. W., Lu, X. R., Lu, Y. P., Luo, C. L., Luo, M. X., Luo, T., Luo, X. L., Lv, M., Ma, C. L., Ma, F. C., Ma, H. L., Ma, Q. M., Ma, S., Ma, T., Ma, X. Y., Ma, Y., Maas, F. E., Maggiora, M., Malik, Q. A., Mao, H., Mao, Y. J., Mao, Z. P., Johan Messchendorp, Min, J., Min, T. J., Mitchell, R. E., Mo, X. H., Morales Morales, C., Motzko, C., Muchnoi, N. Yu, Nefedov, Y., Nicholson, C., Nikolaev, I. B., Ning, Z., Olsen, S. L., Ouyang, Q., Pacetti, S., Park, J. W., Pelizaeus, M., Peters, K., Ping, J. L., Ping, R. G., Poling, R., Prencipe, E., Pun, C. S. J., Qi, M., Qian, S., Qiao, C. F., Qin, X. S., Qin, Y., Qin, Z. H., Qiu, J. F., Rashid, K. H., Rong, G., Ruan, X. D., Sarantsev, A., Schulze, J., Shao, M., Shen, C. P., Shen, X. Y., Sheng, H. Y., Shepherd, M. R., Song, X. Y., Spataro, S., Spruck, B., Sun, 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., Tang, C. J., Tang, X., Thorndike, E. H., Tian, H. L., Toth, D., Ullrich, M., Varner, G. S., Wang, 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., Wei, D. H., Weidenkaff, P., Wen, Q. G., Wen, S. P., Werner, M., Wiedner, U., Wu, L. H., Wu, N., Wu, S. X., Wu, W., Wu, Z., Xia, L. G., Xiao, Z. J., Xie, Y. G., Xiu, Q. L., Xu, G. F., Xu, G. M., Xu, H., Xu, Q. J., Xu, X. P., Xu, Y., Xu, Z. R., Xue, F., Xue, Z., Yan, L., Yan, W. B., Yan, Y. H., Yang, H. X., Yang, T., Yang, Y., Yang, Y. X., Ye, H., Ye, M., Ye, M. H., Yu, B. X., Yu, C. X., Yu, J. S., Yu, S. P., Yuan, C. Z., Yuan, W. L., Yuan, Y., Zafar, A. A., Zallo, A., Zeng, Y., Zhang, 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., Zhao, 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., Zhemchugov, A., Zheng, B., Zheng, J. P., Zheng, Y. H., Zheng, Z. P., Zhong, B., Zhong, J., Zhou, L., Zhou, X. K., Zhou, X. R., Zhu, C., Zhu, K., Zhu, K. J., Zhu, S. H., Zhu, X. L., Zhu, X. W., Zhu, Y. M., Zhu, Y. S., Zhu, Z. A., Zhuang, J., Zou, B. S., Zou, J. H., Zuo, J. X., and Besiii Collaboration

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

Author: Ablikim M, Achasov MN, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ban Y, Becker J, Berger N, Bertani M, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra A, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feldbauer F, Feng CQ, Ferroli RB, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kühn W, Lai W, Lange JS, Leung JK, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu KY, Liu K, Liu K, Liu PL, Liu SB, Liu X, Liu XH, Liu Y, Liu YB, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Ma Y, Maas FE, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Morales Morales C, Motzko C, Muchnoi NY, Nefedov Y, Nicholson C, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Ullrich M, Varner GS, Wang B, Wang BQ, Wang JX, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Weidenkaff P, Wen QG, Wen SP, Werner M, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue F, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JG, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao JW, Zhao KX, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YM, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, and Zuo JX
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: 2013
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38. Evidence for the direct two-photon transition from ψ(3686) to J/ψ.

Author: Ablikim M, Achasov MN, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denig A, Denysenko I, Destefanis M, Ding WM, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Fava L, Feldbauer F, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Gradl W, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Held T, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JK, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu PL, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Ma Y, Maas FE, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Morales Morales C, Motzko C, Muchnoi NY, Nefedov Y, Nicholson C, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Prencipe E, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qin Y, Qin ZH, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Ulrich MU, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Weidenkaff P, Wen QG, Wen SP, Werner MW, Wiedner U, Wu LH, Wu N, Wu SX, Wu W, Wu Z, Xia LG, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue F, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu JS, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JG, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao JW, Zhao KX, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YM, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, and Zuo JX
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
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39. Measurements of the mass and width of the η(c) using the decay ψ(3686)→γη(c).

Author: Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen HX, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JK, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, and Zuo JX
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
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40. First observation of η(1405) decays into f(0)(980)π0.

Author: Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Baldini Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JK, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wan X, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, and Zuo JX
Abstract: The decays J/ψ → γ π+ π- π0 and J/ψ → γ π0 π0 π0 are analyzed using a sample of 225×10(6) J/ψ events collected with the BESIII detector. The decay of η(1405) → f(0)(980)π0 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 η' are also measured precisely.
Published: 2012
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41. Spin-parity analysis of pp¯ mass threshold structure in J/ψ and ψ(3686) radiative decays.

Author: Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Baldini Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JK, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, and Zuo JX
Abstract: A partial wave analysis of the pp¯ mass-threshold enhancement in the reaction J/ψ→γpp¯ 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 Γ<76 MeV/c(2) at the 90% C.L. The product of branching ratios is measured to be BR[J/ψ→γX(pp¯)]BR[X(pp¯)→pp¯]=[9.0(-1.1)(+0.4)(stat)(-5.0)(+1.5)(syst)±2.3(model)]×10(-5). A similar analysis performed on ψ(3686)→γpp¯ decays shows, for the first time, the presence of a corresponding enhancement with a production rate relative to that for J/ψ decays of R=[5.08(-0.45)(+0.71)(stat)(-3.58)(+0.67)(syst)±0.12(model)]%.
Published: 2012
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42. ηπ+ π- resonant structure around 1.8 GeV/c(2) and η(1405) in J/ψ → ωηπ+ π-.

Author: Ablikim M, Achasov MN, Alberto D, An Q, An ZH, Bai JZ, Baldini R, Ban Y, Becker J, Berger N, Bertani M, Bian JM, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Cao XX, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Y, Dong LY, Dong MY, Du SX, Fan RR, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Grishin S, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Komamiya S, Kuehn W, Lange JS, Leung JK, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu GC, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu YW, Liu Y, Liu ZA, Liu ZQ, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Ma CL, Ma FC, Ma HL, Ma QM, Ma T, Ma X, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Sonoda S, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tian HL, Toth D, Varner GS, Wan X, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang SG, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xu ZZ, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang M, Yang T, Yang Y, Yang YX, Ye M, Ye MH, Yu BX, Yu CX, Yu L, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhao ZL, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhong L, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, and Zuo JX
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
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43. Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/ψ→γπ+π-η'.

Author: Ablikim M, Achasov MN, An L, An Q, An ZH, Bai JZ, Baldini R, Ban Y, Becker J, Berger N, Bertani M, Bian JM, Boyko I, Briere RA, Bytev V, Cai X, Cao GF, Cao XX, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Y, Dong LY, Dong MY, Du SX, Duan MY, Fan RR, Fang J, Fang SS, Feldbauer F, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Grishin S, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kavatsyuk M, Komamiya S, Kuehn W, Lange JS, Leung JK, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li L, Li NB, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu GC, Liu H, Liu HB, Liu HM, Liu HW, Liu JP, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu YW, Liu Y, Liu ZA, Liu ZQ, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Ma CL, Ma FC, Ma HL, Ma QM, Ma T, Ma X, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Mitchell RE, Mo XH, Motzko C, Muchnoi NY, Nefedov Y, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Sonoda S, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tang XF, Tian HL, Toth D, Varner GS, Wan X, Wang BQ, Wang K, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang SG, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xu GF, Xu GM, Xu H, Xu Y, Xu ZR, Xu ZZ, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang M, Yang T, Yang Y, Yang YX, Ye M, Ye MH, Yu BX, Yu CX, Yu L, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhao ZL, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhong L, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX, and Zweber P
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
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44. Evidence for ψ' decays into γπ0 and γη.

Author: Ablikim M, Achasov MN, An L, An Q, An ZH, Bai JZ, Baldini R, Ban Y, Becker J, Berger N, Bertani M, Bian JM, Boyko I, Briere RA, Bytev V, Cai X, Cao GF, Cao XX, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Y, Dong LY, Dong MY, Du SX, Duan MY, Fan RR, Fang J, Fang SS, Feldbauer F, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Grishin S, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kavatsyuk M, Komamiya S, Kuehn W, Lange JS, Leung JK, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li L, Li NB, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu GC, Liu H, Liu HB, Liu HM, Liu HW, Liu JP, Liu K, Liu KY, Liu Q, Liu SB, Liu XH, Liu YB, Liu YW, Liu Y, Liu ZA, Liu ZQ, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Ma CL, Ma FC, Ma HL, Ma QM, Ma T, Ma X, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Mitchell RE, Mo XH, Motzko C, Muchnoi NY, Nefedov Y, Ning Z, Olsen SL, Ouyang Q, Pacetti S, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Sonoda S, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tang XF, Tian HL, Toth D, Varner GS, Wan X, Wang BQ, Wang K, Wang LL, Wang LS, Wang P, Wang PL, Wang Q, Wang SG, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xu GF, Xu GM, Xu H, Xu Y, Xu ZR, Xu ZZ, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang M, Yang T, Yang Y, Yang YX, Ye M, Ye MH, Yu BX, Yu CX, Yu L, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo A, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhao ZL, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhong L, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX, and Zweber P
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
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45. Measurements of h(c)(1P(1)) in psi' decays.

Author: Ablikim M, Achasov MN, An L, An Q, An ZH, Bai JZ, Ban Y, Berger N, Bian JM, Boyko I, Briere RA, Bytev V, Cai X, Cao GF, Cao XX, Chang JF, Chelkov G, Chen G, Chen HS, Chen JC, Chen LP, Chen ML, Chen P, Chen SJ, Chen YB, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding Y, Dong LY, Dong MY, Du SX, Duan MY, Fang J, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Grishin S, Gu YT, Guo AQ, Guo LB, Guo YP, Han SQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Hu XW, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jin DP, Jin S, Komamiya S, Kuehn W, Lange S, Leung JK, Li C, Li C, Li DM, Li F, Li G, Li HB, Li J, Li JC, Li L, Li L, Li QJ, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li YX, Li ZB, Liang H, Liang TR, Liang YT, Liang YF, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu GC, Liu H, Liu HB, Liu HM, Liu HW, Liu J, Liu JP, Liu K, Liu KY, Liu Q, Liu SB, Liu XH, Liu YB, Liu YF, Liu YW, Liu Y, Liu ZA, Lu GR, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Ma CL, Ma FC, Ma HL, Ma QM, Ma X, Ma XY, Maggiora M, Mao YJ, Mao ZP, Min J, Mo XH, Muchnoi NY, Nefedov Y, Ning FP, Olsen SL, Ouyang Q, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CS, Qi M, Qian S, Qiao CF, Qiu JF, Rong G, Ruan XD, Sarantsev A, Shao M, Shen CP, Shen XY, Sheng HY, Sonoda S, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Tang XF, Tian HL, Toth D, Varner GS, Wan X, Wang BQ, Wang JK, Wang K, Wang LL, Wang LS, Wang P, Wang PL, Wang Q, Wang SG, Wang XD, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu YM, Wu Z, Xiao ZJ, Xie YG, Xu GF, Xu GM, Xu H, Xu M, Xu M, Xu XP, Xu Y, Xu ZZ, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang M, Yang P, Yang SM, Yang YX, Ye M, Ye MH, Yu BX, Yu CX, Yu L, Yuan CZ, Yuan Y, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang XY, Zhang Y, Zhang YH, Zhang ZP, Zhao C, Zhao HS, Zhao J, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou ZL, Zhu C, Zhu K, Zhu KJ, Zhu QM, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX, and Zweber P
Abstract: We present measurements of the charmonium state h(c)(1P(1)) made with 106x10(6) psi' events collected by BESIII at BEPCII. Clear signals are observed for psi'-->pi0 h(c) with and without the subsequent radiative decay h(c)-->gamma eta(c). First measurements of the absolute branching ratios B(psi'-->pi0 h(c)) = (8.4+/-1.3+/-1.0) x 10(-4) and B(h(c)-->gamma eta(c)) = (54.3+/-6.7+/-5.2)% are presented. A statistics-limited determination of the previously unmeasured h(c) width leads to an upper limit Gamma(h(c))<1.44 MeV (90% confidence). Measurements of M(h(c)) = 3525.40+/-0.13+/-0.18 MeV/c2 and B(psi'-->pi0 h(c)) x B(h(c)-->gamma eta(c)) = (4.58+/-0.40+/-0.50) x 10(-4) are consistent with previous results.
Published: 2010
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