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1. Observation of Two NewN*Resonances in the Decayψ(3686)→pp¯π0

Author

S. J. Zhao, Zheng Wang, J. S. Lange, S. G. Wang, Jingwei Zhao, C. X. Yu, L. L. Wang, X. Y. Zhang, X. S. Jiang, H. B. Liu, B. S. Zou, J. F. Sun, Xingtao Huang, A. Denig, V. Bytev, Y. X. Yang, Y. Yuan, X. H. Mo, Q. J. Wang, J. P. Liu, Jianping Zheng, W. Gradl, M. L. Chen, J. L. Fu, H. Mao, Y. Qin, H. H. Zhang, Y. Z. Sun, T. C. Zhao, J. L. Ping, W. L. Yuan, P. Weidenkaff, S. H. Zhu, S. H. Zhang, Zhenyu Zhang, W. Lai, X. L. Ji, Zhiqiang Liu, Miao He, Q. An, P. L. Liu, M. Lv, J. G. Zhang, R. G. Ping, C. L. Ma, Daniel P Cronin-Hennessy, C. S. Ji, R. Poling, W. Kühn, P. Wang, T. Yang, S. X. Wu, I. Denysenko, E. Boger, S. Pacetti, B. X. Yu, Jianhao Zhang, Xiujuan Tang, Jie Yu, Guo-Ming Chen, Tao Hu, Lei Zhao, X. Q. Hao, Y. H. Yan, Wu Li, Jin Wang, Z. L. Hou, G. Rong, Xing Lu, J. Zhong, T. J. Min, Y. M. Zhu, X. R. Zhou, J. S. Huang, Z. J. Xiao, Z. H. An, B. Spruck, K. H. Rashid, L. Y. Dong, Niklaus Berger, E. Prencipe, S. P. Wen, Y. F. Liang, X. Liu, Z. H. Qin, M. Shao, Z. T. Sun, C. Morales Morales, R. E. Mitchell, Y. P. Guo, J. K. C. Leung, F. Feldbauer, X. S. Qin, Chang-Zheng Yuan, C. Nicholson, M. Y. Dong, X. L. Li, G. X. Sun, J. B. Jiao, Y. P. Chu, Junguang Lu, C. F. Qiao, Z. G. Zhao, M. R. Shepherd, Feng Xue, Cui Li, Y. T. Liang, J. Fang, B. Zheng, S. Spataro, M. Ullrich, M. Pelizaeus, X. D. Ruan, J. F. Chang, G. F. Cao, Y. J. Sun, D. H. Sun, Hua-Bin Li, M. Qi, Wei Li, X. L. Wang, J. K. Becker, Xu Zhang, Hao Liu, S. S. Sun, F. F. An, J. P. Dai, Y. H. Guan, X. H. Liu, J. C. Chen, Xie-Yan Song, J. Zhang, Ling Zhao, Guangyu Zhao, Hai Liang, Z. Y. He, Z. Xue, M. Kavatsyuk, Y. P. Lu, Kun Liu, Fang Liu, C. L. Luo, Lei Zhou, G. R. Liao, A. Zhemchugov, Yang Yang, Yulei Han, Li-Feng Wang, Y. K. Heng, D. Toth, Chunyan Zhu, Sai-Juan Chen, D. H. Zhang, Yang Gao, Shisong Fang, Yuehong Xie, Wei Wu, K. Peters, Kunlun He, Q. Ouyang, Q. J. Li, J. F. Hu, Z. P. Mao, G. M. Xu, Kai Liu, Z. A. Liu, G. S. Varner, M. Bertani, Z. Ning, H. Y. Zhang, Haiwen Liu, X. H. Zhao, B. Zhong, Yong’an Liu, S. P. Yu, Shaodan Ma, X. T. Liao, A. Zallo, L. G. Xia, Qingming Ma, Kai Zhu, R. A. Briere, Feng Liu, Chang Liu, Y. S. Zhu, J. F. Qiu, H. Xu, X. P. Xu, F. C. Ma, G. M. Huang, J. Min, Chun S. J. Pun, D. Dedovich, T. R. Zhang, M. H. Gu, O. Bondarenko, D. J. Ambrose, J. Z. Bai, Y. T. Gu, M. G. Zhao, Y. J. Mao, D. M. Li, Shouguang Jin, Qian Wang, Y. P. Huang, G. Li, Y. D. Wang, X. N. Li, X. F. Wang, Zhen Wang, M. Ye, Huihui Liu, C. Motzko, C. Geng, L. Fava, Tao Luo, Xian Lun Zhu, S. L. Olsen, Li Yan, Talib Hussain, J. G. Messchendorp, G. R. Lu, C. D. Fu, A. Calcaterra, Q. L. Xiu, Jiangchao Li, Yi-Fang Zhao, Fu-Hu Liu, L. Zhang, H. S. Chen, Zong-Ping Zheng, H. Loehner, Joong-Won Park, Y. H. Zheng, W. B. Yan, H. L. Dai, J. Zhuang, S. X. Du, L. L. Jiang, Jun-Yi Zhang, G. F. Xu, L. H. Wu, M. X. Luo, G. Chelkov, B. X. Zhang, I. B. Nikolaev, Xueyong Shen, Zujian Wang, Y. S. Zhang, Xiaobo Zhu, Zhi-Jun Sun, Zhihao Xu, Chuan Liu, J. Schulze, J. M. Bian, N. Yu. Muchnoi, F. F. Jing, Y. H. Zhang, Q. W. Lu, K. Li, B. Huang, N. Kalantar-Nayestanaki, Y. Ding, E. H. Thorndike, Q. G. Wen, S. Qian, M. Maggiora, Bingxin Zhang, M. N. Achasov, J. X. Zuo, H. Y. Sheng, M. Greco, S. B. Liu, U. Wiedner, Lei Li, L. K. Jia, Z. P. Zhang, YongJu Chen, T. Ma, Jianguo Zhang, M. H. Ye, Yun-Zhi Zhang, H. P. Cheng, Y. Q. Wang, Z. A. Zhu, M. Ablikim, A. A. Zafar, X. B. Ji, K. Goetzen, Q. Ji, W. M. Ding, N. Wu, Feng Li, D. P. Jin, Y. F. Wang, F. A. Harris, B. Wang, Z. Y. Deng, Michael Werner, X. Y. Ma, Hang Liu, Chunmei Zhang, Q. J. Xu, D. H. Wei, C. H. Li, X. Q. Li, H. M. Hu, Hailong Ma, L. B. Guo, Z. Wu, Y. B. Chen, J. Z. Zhang, Y. B. Liu, K. Y. Liu, H. L. Tian, C. J. Tang, K. X. Zhao, K. Wang, P. L. Wang, X. L. Luo, C. Q. Feng, X. K. Zhou, B. Q. Wang, Y. Ma, H. S. Zhao, C. P. Shen, T. Held, H. J. Lu, Cunming Liu, I. Boyko, Y. Xu, N. B. Li, Y. Zeng, Q Zhao, H. Ye, Brent J. Liu, M. Destefanis, W. X. Gong, Zhibing Li, Y. Ban, Q. A. Malik, Zhiqing Liu, F. E. Maas, Cheng Li, A. Sarantsev, Y. Nefedov, X. D. Sun, H. X. Yang, K. J. Zhu, M. Wang, X. R. Li, A. Q. Guo, Z. Jiao, S. L. Li, R. B. Ferroli, J. H. Zou, and X. Cai

Subjects
Baryon, Nuclear physics, Physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, Analytical chemistry, General Physics and Astronomy, Resonance, Bar (unit)
Abstract

Based on 106 x 10(6)psi(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of psi(3686) -> p (p) over bar pi(0) is performed. The branching fraction of this channel has been determined to be B psi(3686) -> p (p) over bar pi(0) = (1.65 +/- 0.03 +/- 0.15) x 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/c(2) and width of 340(-30-58)(+30+110) MeV/c(2), and one 5/2(-) resonance with a mass of 2570(-10-10)(+19+34) MeV/c(2) and width of 250(-24-21)(+14+69) MeV/c(.)(2) 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. DOI: 10.1103/PhysRevLett.110.022001

Published
2013

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

Author

C. Q. Feng, L. Zhang, Z. Jiao, Z. A. Zhu, B. Q. Wang, M. Bertani, Y. Ma, C. P. Shen, B. Zhong, J. Q. Zhang, Zhe Sun, X. S. Qin, C. Nicholson, Qingming Ma, Zhiqing Liu, Y. B. Chen, Feng Liu, Chang Liu, J. Z. Zhang, M. Ullrich, X. D. Ruan, H. H. Liu, T. R. Zhang, K. Wang, Kun Liu, Shisong Fang, F. F. An, Y. H. Guan, X. H. Liu, X. H. Mo, M. H. Gu, L. Yu, X. R. Li, Q. J. Wang, J. P. Liu, Y. P. Guo, J. K. C. Leung, G. Li, A. Q. Guo, Jianping Zheng, W. L. Yuan, Ling Zhao, H. Loehner, J. B. Jiao, M. Lv, J. G. Zhang, X. T. Liao, Y. P. Chu, Junguang Lu, C. F. Qiao, J. Z. Bai, Y. T. Gu, J. C. Chen, Lei Zhao, Z. Y. He, G. Chelkov, Yang Yang, C. L. Ma, H. Xu, F. C. Ma, I. Boyko, Y. Zeng, J. Zhuang, L. H. Wu, M. X. Luo, Y. H. Yan, Z. Ning, X. L. Wang, X. S. Jiang, J. S. Huang, C. Geng, A. Zhemchugov, R. A. Briere, D. H. Zhang, H. B. Liu, S. L. Li, R. B. Ferroli, C. S. Ji, T. Yang, L. Y. Dong, L. K. Jia, I. Denysenko, E. Boger, B. X. Zhang, Y. J. Mao, Niklaus Berger, S. Pacetti, Zhiqiang Liu, Miao He, Q. An, B. X. Yu, D. P. Jin, W. Kuehn, J. F. Hu, X. L. Li, S. X. Wu, B. S. Zou, T. J. Min, Xiujuan Tang, X. N. Li, Brent J. Liu, M. Destefanis, Feng Li, G. M. Xu, H. M. Hu, H. Mao, Haiping Peng, X. Cai, Y. T. Liang, Zhihao Xu, Chuan Liu, Zong-Ping Zheng, Z. H. Qin, J. H. Zou, Xie-Yan Song, W. X. Gong, G. M. Huang, D. J. Ambrose, Chang-Zheng Yuan, P. Weidenkaff, J. Zhang, M. Kavatsyuk, A. Sarantsev, Tao Luo, B. Wang, Z. Y. Deng, Daniel P Cronin-Hennessy, Xingtao Huang, A. Denig, Q. Ouyang, Sai-Juan Chen, K. Li, Michael Werner, E. H. Thorndike, Chun S. J. Pun, V. Bytev, Li Yan, H. L. Ma, C. Motzko, S. L. Olsen, Y. Qin, M. Shao, Xian Lun Zhu, C. D. Fu, N. Yu. Muchnoi, Y. Nefedov, D. H. Sun, Hang Liu, J. S. Lange, L. B. Guo, M. G. Zhao, T. C. Zhao, J. L. Ping, X. D. Sun, R. Poling, G. R. Lu, X. F. Wang, Huihui Liu, Fu-Hu Liu, Y. H. Zhang, Q. W. Lu, H. X. Yang, K. J. Zhu, Jingwei Zhao, A. Calcaterra, X. W. Zhu, O. Bondarenko, Yu-Bin Liu, H. H. Zhang, Jiangchao Li, Z. G. Zhao, Yuanbo Chen, Q. J. Xu, J. G. Messchendorp, S. B. Liu, Joong-Won Park, Q. G. Wen, Xuantong Zhang, C. X. Liu, L. Fava, Y. X. Yang, S. H. Zhang, H. L. Dai, Jie Yu, D. H. Wei, Yao Wang, Y. Yuan, Q. L. Xiu, E. Prencipe, Z. Y. Wang, M. Maggiora, Lei Li, G. X. Sun, W. G. Li, M. Wang, S. X. Du, Guo-Ming Chen, Z. L. Hou, Y. B. Liu, Z. P. Zhang, B. D. Schaefer, Y. Ban, S. G. Wang, J. Schulze, M. Y. Dong, X. L. Ji, S. P. Yu, S. P. Wen, Y. F. Liang, Y. Z. Sun, Q. A. Malik, S. H. Zhu, J. M. Bian, Z. H. An, B. Spruck, Z. Xue, T. Ma, Q. Ji, C. X. Yu, Y. Ding, Haosheng Chen, Talib Hussain, P. L. Wang, G. F. Xu, S. Qian, J. F. Sun, M. R. Shepherd, F. Feldbauer, Hai Liang, P. L. Liu, Feng Xue, Cui Li, Hua-Bin Li, M. Qi, J. K. Becker, Y. Xu, N. B. Li, Q. J. Li, Q Zhao, H. M. Liu, M. Pelizaeus, H. Ye, G. S. Varner, Y. Zhang, Yulei Han, Yuehong Xie, Xing Lu, Wei Wu, F. E. Maas, J. Zhong, H. P. Cheng, X. Q. Li, Kunlun He, Kai Liu, Yang Gao, Ka-Yuet Liu, N. Wu, Y. Q. Wang, Zhibing Li, M. Ablikim, C. L. Luo, A. A. Zafar, W. B. Yan, L. L. Jiang, X. L. Luo, Fang Liu, Lei Zhou, X. K. Zhou, Xueyong Shen, Zujian Wang, Y. S. Zhang, H. S. Zhao, Zhi-Jun Sun, X. P. Xu, T. Held, H. J. Lu, D. M. Li, B. Y. Zhang, Y. H. Zheng, I. B. Nikolaev, F. F. Jing, M. N. Achasov, J. X. Zuo, Z. G. Wang, H. Y. Zhang, Guangyu Zhao, R. E. Mitchell, J. Y. Zhang, J. P. Dai, J. Min, Chunyan Zhu, D. Dedovich, Shaodan Ma, Shouguang Jin, Yi-Fang Zhao, Y. P. Huang, W. Gradl, W. Lai, Y. K. Heng, J. W. Zhang, X. Q. Hao, Tao Hu, B. Huang, Zhiyong Zhang, L. S. Wang, N. Kalantar-Nayestanaki, M. H. Ye, K. H. Rashid, X. Liu, C. Morales Morales, H. Y. Sheng, S. Spataro, M. Greco, U. Wiedner, Y. P. Lu, G. R. Liao, D. Toth, S. J. Zhao, L. L. Wang, X. Y. Zhang, M. L. Chen, R. G. Ping, S. S. Sun, X. B. Ji, K. Goetzen, Z. P. Mao, X. H. Zhao, W. M. Ding, J. Fang, J. F. Chang, G. F. Cao, G. Rong, Z. A. Liu, Y. M. Zhu, X. R. Zhou, J. L. Fu, Cheng Li, Z. J. Xiao, B. Zheng, Y. J. Sun, Wei Li, Qun-Yao Wang, K. Peters, A. Zallo, L. G. Xia, Y. S. Zhu, J. F. Qiu, Z. Wu, H. L. Tian, C. J. Tang, K. X. Zhao, Y. F. Wang, F. A. Harris, X. Y. Ma, Chunmei Zhang, and C. H. Li

Subjects
Physics, Branching fraction, Electron–positron annihilation, Excited state, Analytical chemistry, General Physics and Astronomy
Abstract

Using a sample of 106×10(6) ψ(3686) events collected with the BESIII detector at the BEPCII storage ring, we have made the first measurement of the M1 transition between the radially excited charmonium S-wave spin-triplet and the radially excited S-wave spin-singlet states: ψ(3686)→γη(c)(2S). Analyses of the processes ψ(3686)→γη(c)(2S) with η(c)(2S)→K(S)(0)K(±)π(∓) and K(+)K(-)π(0) give an η(c)(2S) signal with a statistical significance of greater than 10 standard deviations under a wide range of assumptions about the signal and background properties. The data are used to obtain measurements of the η(c)(2S) mass (M(η(c)(2S))=3637.6±2.9(stat)±1.6(syst) MeV/c(2)), width (Γ(η(c)(2S))=16.9±6.4(stat)±4.8(syst) MeV), and the product branching-fraction (B(ψ(3686)→γη(c)(2S))×B(η(c)(2S)→KKπ)=(1.30±0.20(stat)±0.30(syst))×10(-5)). Combining our result with a BABAR measurement of B(η(c)(2S)→KKπ), we find the branching fraction of the M1 transition to be B(ψ(3686)→γη(c)(2S))=(6.8±1.1(stat)±4.5(syst))×10(-4).

Published
2012

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

Author

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

Abstract

Based on 106×10(6)ψ(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of ψ(3686)→ppπ0 is performed. The branching fraction of this channel has been determined to be B(ψ(3686)→ppπ0)=(1.65±0.03±0.15)×10(-4). In this decay, 7 N* intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2+ resonance with a mass of 2300(-30-0)(+40+109) MeV/c2 and width of 340(-30-58)(+30+110) MeV/c2, and one 5/2- resonance with a mass of 2570(-10-10)(+19+34) MeV/c2 and width of 250(-24-21)(+14+69) MeV/c2. For the remaining 5 N* intermediate resonances [N(1440), N(1520), N(1535), N(1650) and N(1720)], the analysis yields mass and width values that are consistent with those from established resonances.

Published
2012

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

Author

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

Subjects
Physics, Particle physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy
Abstract

The two-photon transition ψ(3686)→γγJ/ψ is studied in a sample of 1.06×10(8) ψ(3686) decays collected by the BESIII detector. The branching fraction is measured to be (3.1±0.6(stat)(-1.0)(+0.8)(syst))×10(-4) using J/ψ→e(+)e(-) and J/ψ→μ(+)μ(-) decays, and its upper limit is estimated to be 4.5×10(-4) at the 90% confidence level. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the ψ(3686) decay plane and the J/ψ polarization in this decay are also studied. In addition, the product branching fractions of sequential E1 transitions ψ(3686)→γχ(cJ) and χ(cJ)→γJ/ψ(J=0,1,2) are reported.

Published
2012

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

Author

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

Abstract

We present results of a study of the decay J/ψ → ωηπ+ π- using a sample of (225.2 ± 2.8) × 10(6) J/ψ events collected by the BESIII detector, and report the observation of a new process J/ψ → ωX(1870) with a statistical significance of 7.2σ, in which X(1870) decays to a(0)(±)(980)π±. Fitting to ηπ+ π- mass spectrum yields a mass M = 1877.3 ± 6.3(stat)(-7.4)(+3.4)(syst) MeV/c(2), a width Γ = 57 ± 12(stat)(-4)(+19)(syst) MeV/c(2), and a product branching fraction B(J/ψ → ωX) × B(X→a(0)(±)(980)π±) × B(a(0) (±)(980) → ηπ±) = [1.50 ± 0.26(stat)(-0.36)(+0.72) (syst)] × 10(-4). Signals for J/ψ → ωf(1)(1285) and J/ψ → ω η(1405) are also clearly observed and measured.

Published
2011

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

Author

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

Abstract

Using (106±4)×10⁻⁶ ψ(3686) events accumulated with the BESIII detector at the BEPCII e⁺e⁻ collider, we present the first measurement of decays of χ(c1) to vector meson pairs φφ, ωω, and ωφ. The branching fractions are measured to be (4.4±0.3±0.5)×10⁻⁴, (6.0±0.3±0.7)×10⁻⁴, and (2.2±0.6±0.2)×10⁻⁵, for χ(c1)→φφ, ωω, and ωφ, respectively, which indicates that the hadron helicity selection rule is significantly violated in χ(cJ) decays. In addition, the measurement of χ(cJ)→ωφ provides the first indication of the rate of doubly OZI-suppressed χ(cJ) decay. Finally, we present improved measurements for the branching fractions of χ(c0) and χ(c2) to vector meson pairs.

Published
2011

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

Author

HY Zhang, Z. Xue, H. M. Hu, Zong-Ping Zheng, M. Qi, M. Y. Dong, Haosheng Chen, F. F. Jing, B. Zhong, L. B. Guo, W. L. Yuan, S. S. Sun, Z. Ning, P. L. Wang, X. L. Luo, H. S. Zhao, Y. B. Liu, X. B. Ma, Y. Xu, N. B. Li, Q Zhao, Meng Wang, N. Yu. Muchnoi, Hai Liang, L. An, Yang Gao, S. G. Wang, F. Feldbauer, Qingming Ma, M. H. Ye, J. C. Chen, M. Y. Duan, D. P. Jin, Chang Liu, C. Q. Feng, C. X. Yu, Zhibing Li, Y. H. Zhang, Q. W. Lu, A. Zhemchugov, Kunlun He, K. Peters, Z. P. Mao, X. L. Wang, R. R. Fan, T. R. Zhang, Chang-Zheng Yuan, D. H. Zhang, X. H. Zhao, Shou-hua Zhu, X. K. Zhou, J. F. Hu, C. Motzko, J. H. Zou, X. B. Ji, K. Goetzen, Y. H. Yan, J. F. Sun, L. Yu, G. X. Sun, W. G. Li, S. L. Olsen, G. Li, Z. Y. Wang, X. Q. Li, W. Kuehn, Hang Liu, J. S. Huang, X. R. Li, M. Maggiora, M. Bertani, C. P. Shen, X. Q. Hao, D. H. Sun, H. Loehner, Z. L. Zhao, G. R. Lu, X. T. Liao, H. Xu, Y. Q. Wang, M. Ablikim, F. C. Ma, D. H. Wei, J. Z. Bai, Y. T. Gu, G. Rong, G. M. Huang, S. J. Zhao, Julian Schulze, Z. Wu, H. H. Zhang, I. Boyko, L. L. Wang, Yi-Fang Zhao, L. Zhang, Q. J. Li, H. M. Liu, X. Y. Zhang, Z. Z. Xu, Y. Zeng, X. L. Ji, J. F. Qiu, M. L. Chen, A. A. Zafar, Xie-Yan Song, B. Huang, Y. H. Guan, L. S. Wang, L. Y. Dong, Niklaus Berger, Yao Wang, G. S. Varner, H. L. Ma, K. Y. Liu, H. L. Tian, C. J. Tang, Z. H. An, M. Shao, H. H. Liu, X. H. Liu, B. Spruck, Ling Zhong, Z. A. Zhu, B. Q. Wang, H. Y. Sheng, Xingtao Huang, M. Greco, P. Zweber, U. Wiedner, Y. J. Mao, V. Bytev, Feng Liu, S. P. Wen, Li Yan, Ling Zhao, Q. Ouyang, Shisong Fang, K. H. Rashid, Y. F. Liang, C. S. Ji, Z. Jiao, Fu-Hu Liu, Y. F. Wang, J. Zhuang, L. H. Wu, R. G. Ping, F. A. Harris, Lei Zhao, Z. Y. He, Yang Yang, Q. Liu, X. L. Li, X. S. Jiang, Brent J. Liu, T. Yang, M. X. Luo, X. D. Ruan, W. B. Yan, L. L. Jiang, M. Destefanis, Cui Li, J. P. Dai, Chunyan Zhu, T. Hussain, X. Y. Ma, H. B. Liu, B. S. Zou, C. X. Liu, Y. S. Zhu, I. Denysenko, Y. T. Liang, X. F. Tang, Z. G. Zhao, Y. X. Yang, J. S. Lange, G. M. Xu, Chunmei Zhang, W. X. Gong, C. Geng, Xueyong Shen, Guangyu Zhao, H. Mao, J. Zhang, M. Kavatsyuk, Zujian Wang, H. J. Lu, Zhiyong Zhang, G. Chelkov, H. L. Dai, M. R. Shepherd, X. X. Cao, X. Liu, Y. W. Liu, T. C. Zhao, J. L. Ping, Y. Z. Sun, Zhi-Jun Sun, S. X. Du, R. Poling, B. X. Yu, Yuanbo Chen, S. B. Liu, Z. Y. Deng, Y. K. Heng, J. W. Zhang, J. M. Bian, Q. A. Malik, Jingwei Zhao, Lei Li, Hua-Bin Li, Z. P. Zhang, Y. Ding, Zhiqiang Liu, Miao He, Daniel P Cronin-Hennessy, R. A. Briere, Xing Lu, A. Zallo, Q. An, Y. Zhang, J. Zhong, T. Ma, S. Qian, Yuehong Xie, Wei Wu, Zhe Sun, G. C. Liu, L. K. Jia, Jiawei Zhao, Y. Yuan, H. P. Cheng, J. Fang, J. F. Chang, S. Grishin, Feng Li, Y. B. Chen, J. Z. Zhang, G. F. Cao, K. Wang, Q. Ji, Jürgen Becker, N. Wu, R. E. Mitchell, M. N. Achasov, J. X. Zuo, S. Pacetti, Fang Liu, Lei Zhou, D. M. Li, B. Y. Zhang, Cheng Li, Y. H. Zheng, X. N. Li, Tao Luo, Xian Lun Zhu, C. D. Fu, Jiangchao Li, Yong Liu, G. F. Xu, M. Pelizaeus, C. L. Luo, B. X. Zhang, Zhihao Xu, Chuan Liu, Chun S. J. Pun, M. G. Zhao, J. P. Liu, J. G. Messchendorp, A. Q. Guo, Mingming Yang, Z. A. Liu, Tao Hu, X. S. Qin, X. R. Zhou, J. L. Fu, Z. J. Xiao, M. H. Gu, Z. G. Wang, X. Wan, B. Zheng, J. Y. Zhang, J. Min, Y. J. Sun, D. Dedovich, Wei Li, S. Sonoda, Shouguang Jin, X. Tang, Y. P. Huang, Sachio Komamiya, Qun-Yao Wang, A. Sarantsev, S. Spataro, Y. Nefedov, X. D. Sun, H. X. Yang, K. J. Zhu, Xuantong Zhang, Y. Ban, Y. P. Lu, G. R. Liao, D. Toth, R. Baldini, X. H. Mo, Jianping Zheng, X. W. Zhu, C. L. Ma, S. H. Zhang, Guo-Ming Chen, Z. L. Hou, Sai-Juan Chen, Y. P. Guo, J. K. C. Leung, J. B. Jiao, Y. P. Chu, Junguang Lu, C. F. Qiao, and X. Cai

Subjects
Physics, Nuclear physics, Particle physics, Pion, Meson, Electron–positron annihilation, Hadron, Mass spectrum, General Physics and Astronomy, High Energy Physics::Experiment, Elementary particle, Quarkonium, Spectral line
Abstract

With a sample of (225.2 +/- 2.8) x 10(6) J/psi events registered in the BESIII detector, J/psi -> gamma pi(+)pi(-)eta' is studied using two eta' decay modes: eta' -> pi(+)pi(-)eta and eta' -> gamma rho(0). The X(1835), which was previously observed by BESII, is confirmed with a statistical significance that is larger than 20 sigma. In addition, in the pi(+)pi(-)eta' invariant-mass spectrum, the X(2120) and the X(2370), are observed with statistical significances larger than 7.2 sigma and 6.4 sigma, respectively. For the X(1835), the angular distribution of the radiative photon is consistent with expectations for a pseudoscalar.

Published
2011

8. Evidence forψ′Decays intoγπ0andγη

Author

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

Subjects
Physics, General Physics and Astronomy
Published
2010

9. Measurements of h(c)(1P(1)) in psi' decays

Author

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

Abstract

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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