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1. Observation of the decay Λc+→Σ−π+π+π0

Author: M. Ablikim, M.N. Achasov, S. Ahmed, M. Albrecht, A. Amoroso, F.F. An, Q. An, J.Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, O. Dorjkhaidav, Z.L. Dou, S.X. Du, P.F. Duan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, S. Fegan, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, S. Gu, Y.T. Gu, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guo, Z. Haddadi, S. Han, X.Q. Hao, F.A. Harris, K.L. He, X.Q. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, T. Hussain, W. Ikegami Andersson, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, T. Khan, P. Kiese, R. Kliemt, L. Koch, O.B. Kolcu, B. Kopf, M. Kornicer, M. Kuemmel, M. Kuhlmann, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, L. Lavezzi, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, Ke Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, Y.F. Long, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, G. Morello, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, A. Mustafa, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, J. Pellegrino, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, J.J. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Richter, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, J.J. Song, X.Y. Song, S. Sosio, C. Sowa, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.K. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, G.Y. Tang, X. Tang, I. Tapan, M. Tiemens, B.T. Tsednee, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, Dan Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W.P. Wang, X.F. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, Y. Xia, D. Xiao, H. Xiao, Y.J. Xiao, Z.J. Xiao, Y.G. Xie, Y.H. Xie, X.A. Xiong, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.H. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, Z.Y. You, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, Y.X. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou
Subjects: Branching fraction, Charmed baryon, Weak decays, e+e− annihilation, BESIII, Physics, QC1-999
Abstract: We report the first observation of the decay Λc+→Σ−π+π+π0, based on data obtained in e+e− annihilations with an integrated luminosity of 567 pb−1 at s=4.6 GeV. The data were collected with the BESIII detector at the BEPCII storage rings. The absolute branching fraction B(Λc+→Σ−π+π+π0) is determined to be (2.11±0.33(stat.)±0.14(syst.))%. In addition, an improved measurement of B(Λ+c→Σ−π+π+) is determined as (1.81±0.17(stat.)±0.09(syst.))%.
Published: 2017
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2. Observation of a00(980)−f0(980) Mixing

Author: L. Yang, Jiangbo Zhu, M. Qi, H. J. Yang, S. B. Liu, W. Gradl, M. Ripka, D. Y. Wang, J. Min, B. Kopf, K. L. He, M. Z. Wang, Jimin Zhao, P. L. Li, A. Pitka, Guangshun Huang, L. Yan, Zhiqing Liu, Kai Liu, T. Johansson, G. A. Chelkov, J. F. Chang, Y. H. Xie, J. Pellegrino, O. B. Kolcu, Y. Nefedov, X. Cai, L. Lavezzi, M. Maggiora, Ling Zhao, W. M. Song, Lei Zhao, Z. L. Hou, C. Sowa, Y. B. Zhao, W. Shan, X. Q. Hao, J. Dong, Xiao-Rui Lyu, T. Khan, Y. Q. Wang, M. Richter, Z. Ning, C. Z. Yuan, S. Nisar, C. J. Tang, M. Kuhlmann, Q. Liu, Y. Hu, Y. P. Lu, Michael Papenbrock, Z. A. Liu, G. Felici, C. Leng, X. Fang, D. Xiao, L. L. Ma, L. Gong, Bibo Ke, Z. L. Huang, W. B. Yan, Cui Li, A. Amoroso, Feng Liu, Jun-Yi Zhang, Y. P. Guo, M. Albrecht, H. Liang, M. Ablikim, M. N. Achasov, Z. P. Zhang, Z. J. Xiao, W. D. Li, Y. G. Gao, B. T. Tsednee, S. Pacetti, G. S. Varner, A. Dbeyssi, Zhuoming Li, D. W. Bennett, Zujian Wang, Y. Bai, Ke Wang, H. J. Li, Y. H. Zheng, J. Q. Zhang, Q. L. Xiu, Cong-Feng Qiao, X. Y. Jiang, M. M. Ma, Yunlong Zhang, A. Julin, D. Bettoni, L. J. Wu, H. J. Lu, I. Tapan, Ke Li, J. L. Zhang, F. De Mori, M. Y. Dong, Zahra Haddadi, S. Ahmed, Y. X. Yang, N. Yu. Muchnoi, P. F. Duan, J. G. Lu, R. Poling, Y. Pan, Jianping Zheng, Y. J. Mo, Y. H. Yan, J. Chai, S. Zhu, Yao Wang, J. W. Zhao, X. Y. Zhou, G. X. Sun, J. V. Bennett, X. S. Kang, Y. H. Zhang, Jianhao Zhang, M. Tiemens, F. E. Maas, H. B. Liu, Z. Jiao, Fu-Hu Liu, D. H. Zhang, I. Uman, Gianfranco Morello, Magnus Wolke, T. Hu, S. Gu, Y. C. Zhu, Y. F. Liang, Fenfen An, Q. Ouyang, S. S. Fang, B. L. Wang, X. F. Wang, Ke Liu, Z. G. Wang, O. Bakina, X. L. Ji, H. Y. Zhang, Haiwen Liu, D. P. Jin, J. H. Zou, M. Destefanis, Q. Zhao, T. Weber, X. N. Ma, X. L. Gao, J. F. Sun, Q. M. Ma, Y. B. Liu, Z. Y. Wang, A. Mustafa, Y. Z. Sun, T. C. Zhao, X. Y. Niu, Yaquan Fang, H. Xiao, E. Boger, Dayong Wang, N. Qin, Y. J. Mao, P. X. Shen, S. S. Sun, P. Larin, Z. Wu, T. Held, Shun-Jia Huang, H. X. Yang, G. F. Chen, Y. Yuan, Y. S. Zhu, X. S. Qin, Xiang Zhou, P. L. Wang, C. Dong, S. Sosio, X. L. Luo, Yu Zhang, M. Fritsch, R. Kliemt, I. Garzia, Xiaozhong Huang, Q. P. Ji, M. Kavatsyuk, S. Marcello, Y. Zeng, Zhiqing Zhang, Yanwei Wang, R. E. Mitchell, Gang Zhao, Liqing Xu, X. Y. Shen, Joachim Pettersson, F. Feldbauer, J. Y. Zhang, O. Dorjkhaidav, B. Garillon, Y. G. Xie, X. K. Zhou, Fang Liu, B. X. Zhang, F. Bianchi, C. Hu, Andrzej Kupsc, K. Schoenning, Q. Y. Li, B. S. Zou, Y. Ding, Jie Yu, X. Tang, I. Denysenko, S. X. Du, W. C. Yan, Z. L. Dou, Niklaus Berger, R. Farinelli, M. L. Chen, B. J. Liu, Q. A. Malik, G. Mezzadri, A. Yuncu, M. Rolo, J. G. Messchendorp, B. X. Yu, B. Y. Zhang, J. P. Dai, X. Q. He, H. L. Ma, W. Kühn, Y. B. Chen, J. Z. Zhang, Z. Y. You, Y. X. Xia, S. H. Zhu, D. M. Li, Zhi Zeng, Qiunan Xu, T. J. Min, K. J. Zhu, Z. A. Zhu, L. P. Zhou, Y. M. Ma, Z. P. Mao, J. J. Song, L. Sun, A. Q. Guo, G. Rong, M. Pelizaeus, T. Holtmann, H. S. Chen, C. P. Shen, G. Cibinetto, J. Y. Liu, J. Fang, Tao Li, Z. Gao, G. Y. Tang, Jin Li, H. L. Dai, Igor Boyko, Lei Zhang, X. H. Xie, Q. Gao, Y. N. Gao, Y. Zhang, Q. An, Ch. Rosner, L. Koch, Xuesong Liu, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, A. Khoukaz, M. Kuemmel, R. Baldini Ferroli, J. Z. Bai, F. A. Harris, W. P. Wang, H. Leithoff, F. Li, M. Alekseev, Z. H. Qin, F. C. Ma, Dan Wang, X. N. Li, Krisztian Peters, M. G. Zhao, Y. H. Yang, R. P. Guo, Haiping Peng, J. F. Qiu, L. Fava, G. R. Liao, B. Q. Wang, W. G. Li, Y. K. Sun, S. Spataro, X. P. Xu, X. B. Ji, P. Patteri, J. M. Bian, S. J. Zhao, Lei Li, Q. J. Xu, Bingxuan Liu, S. Jin, G. Li, G. F. Cao, J. C. Chen, Xuanhong Lou, Nasser Kalantar-Nayestanaki, C. D. Fu, C. Q. Feng, X. R. Chen, Z. Y. Deng, C. Morales Morales, Xingguo Li, K. Goetzen, V. Prasad, S. Han, L. H. Wu, M. Savrie, Yi Jin, L. Xia, Y. J. Xiao, Z. H. Wang, C. F. Redmer, C. Schnier, X. T. Huang, D. Y. Liu, Z. X. Meng, X. A. Xiong, A. A. Zafar, J. B. Jiao, Yuekun Heng, S. Q. Zhang, J. J. Xu, K. H. Rashid, Y. T. Liang, S. J. Chen, K. J. Li, H. R. Qi, J. S. Huang, C. X. Liu, Serkant Ali Cetin, S. Qian, Jialun Ping, K. Zhang, X. Y. Zhang, M. Lara, J. B. Liu, Y. J. Sun, G. F. Xu, Z. T. Sun, Xianglei Zhu, Y. Ban, P. Weidenkaff, F. H. Heinsius, S. P. Wen, X. R. Zhou, Cheng Li, J. H. Wei, X. Y. Song, M. H. Gu, H. Y. Sheng, C. X. Yu, B. Zheng, R. G. Ping, H. H. Liu, X. K. Chu, J. C. Li, Peilian Liu, Zhiyong Zhang, J. Zhuang, M. X. Luo, D. V. Dedovich, H. B. Li, A. G. Denig, C. L. Luo, C. C. Zhang, B. Zhong, L. B. Guo, H. Muramatsu, Ulrich Wiedner, M. Kornicer, T. Ma, A. Calcaterra, Z. G. Zhao, S. Fegan, H. H. Zhang, Z. J. Sun, I. B. Nikolaev, J. H. Yin, M. Shao, Y. T. Gu, E. Fioravanti, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, X. H. Mo, L. S. Wang, M. H. Ye, L. L. Wang, H. Cai, L. D. Liu, L. Y. Dong, W. J. Zheng, F. Nerling, S. L. Niu, F. Y. Li, X. Q. Li, Y. F. Long, M. Greco, K. Y. Liu, W. Ikegami Andersson, Y. F. Wang, T. Hussain, X. Y. Ma, W. X. Gong, X. H. Sun, P. Kiese, S. L. Olsen, R. A. Briere, X. S. Jiang, O. Cakir, and M. Bertani
Subjects: Physics, Meson, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Analytical chemistry, Pi, General Physics and Astronomy, 010306 general physics, 01 natural sciences
Abstract: We report the first observation of a(0)(0)(980)-f(0)(980) mixing in the decays of J/psi -> phi f(0)(980) -> phi a(0)(0)(980) -> phi eta pi(0) and chi(c1) -> a(0)(0)(980)pi(0) -> f(0)(980)pi(0)->pi(+)pi(-)pi(0), using data samples of 1.31 x 10(9) J/psi events and 4.48 x 10(8) psi (3686) events accumulated with the BESIII detector. The signals of f(0)(980) -> a(0)(0)(980) and a(0)(0)(980) -> f(0)(980) mixing are observed at levels of statistical significance of 7.4 sigma and 5.5 sigma, respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, g(a0K+K-) and g(f0K+K-), are estimated. The results improve the understanding of the nature of a(0)(0)(980) and f(0)(980).
Published: 2018

3. Study of η(1475) and X(1835) in radiative J/ψ decays to γϕ

Author: J. Min, D. J. Ambrose, H. B. Liu, Xiao-Rui Lyu, Y. B. Zhao, H. Liang, Q. P. Ji, B. Kopf, W. Shan, G. S. Varner, M. Albrecht, K. L. He, J. Dong, Bibo Ke, S. W. Han, W. D. Li, W. B. Yan, G. R. Liao, S. Pacetti, Jimin Zhao, Qiang Zhao, S. Nisar, X. L. Ji, P. L. Li, C. J. Tang, B. Q. Wang, Y. Hu, Ke Liu, Y. P. Lu, C. F. Redmer, Z. Y. Zhang, Y. F. Wang, S. B. Liu, Y. Nefedov, Q. A. Malik, G. Mezzadri, W. C. Yan, X. Q. He, T. Hussain, Fang Liu, X. Y. Ma, W. X. Gong, U. Wiedner, I. Denysenko, D. Xiao, Y. G. Xie, I. Tapan, M. N. Achasov, L. P. Zhou, Y. M. Ma, M. Qi, Magnus Wolke, Y. F. Liang, Z. L. Dou, Y. H. Yan, J. W. Zhao, Z. P. Mao, B. Y. Zhang, D. P. Jin, Y. C. Zhu, H. J. Yang, Y. Ding, T. Khan, C. H. Li, X. H. Sun, C. Leng, J. Fang, Tao Li, Dayong Wang, N. Qin, Z. A. Liu, J. Pellegrino, B. J. Liu, Z. Gao, S. L. Niu, P. L. Wang, X. Q. Li, Y. F. Long, Ch. Rosner, M. M. Ma, Xiaozhong Huang, M. Y. Dong, Y. H. Zheng, Cong-Feng Qiao, W. Kühn, O. Albayrak, Yuanning Gao, T. Held, Mario Greco, Z. G. Wang, X. L. Luo, M. Maggiora, Ling Zhao, X. Fang, L. Zotti, Z. Y. You, Z. A. Zhu, Yaquan Fang, Shou-hua Zhu, N. Yu. Muchnoi, F. Feldbauer, K. Y. Liu, Andrzej Kupsc, Lei Zhao, J. Chai, X. S. Kang, C. D. Fu, G. X. Sun, J. V. Bennett, H. Y. Zhang, Li Yan, J. H. Zou, Z. L. Hou, J. Q. Zhang, Z. B. Li, W. Ikegami Andersson, Yunlong Zhang, Y. H. Zhang, M. L. Chen, Y. J. Mao, H. X. Yang, I. Garzia, S. L. Olsen, P. Kiese, Z. Jiao, D. H. Zhang, S. S. Sun, M. Bertani, Z. Haddadi, Z. L. Huang, Feng Liu, Dan Wang, C. P. Shen, H. J. Lu, J. G. Lu, L. Yang, R. A. Briere, S. Gu, G. S. Huang, K. Schoenning, Q. Y. Li, B. S. Zou, Jun-Yi Zhang, Z. Y. Wang, I. Uman, X. S. Jiang, M. Ablikim, J. Z. Bai, F. E. Maas, J. F. Sun, D. Bettoni, Z. P. Zhang, R. Baldini Ferroli, W. P. Wang, L. J. Wu, Z. J. Xiao, T. Hu, J. L. Zhang, O. Cakir, P. L. Chen, S. Marcello, F. Bianchi, X. Y. Jiang, Z. Ning, Y. J. Mo, D. W. Bennett, Zujian Wang, J. P. Liu, E. H. Thorndike, Krisztian Peters, Y. Zeng, O. Bakina, R. E. Mitchell, Zhe Sun, M. Z. Wang, X. H. Liu, R. Farinelli, Jianping Zheng, X. K. Zhou, S. Zhu, J. G. Messchendorp, G. F. Chen, C. Z. Yuan, J. P. Dai, Qiunan Xu, P. X. Shen, Z. Wu, Y. X. Xia, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, W. Gradl, I. R. Boyko, X. N. Li, A. Q. Guo, Haiping Peng, S. X. Du, J. J. Song, Zhiqing Liu, Liqing Xu, X. Y. Shen, H. L. Ma, D. Y. Liu, D. M. Li, T. Johansson, Zhiqing Zhang, J. F. Chang, D. Y. Wang, J. Y. Zhang, O. B. Kolcu, X. Cai, L. Lavezzi, M. Destefanis, Ke Wang, G. Felici, H. Muramatsu, C. Hu, X. Tang, R. Poling, P. F. Duan, F. H. Heinsius, Gianfranco Morello, Fenfen An, M. Pelizaeus, Yao Wang, G. A. Chelkov, S. Ahmed, Y. X. Yang, Z. H. Qin, B. L. Wang, H. J. Li, Jia-Jia Qin, T. C. Zhao, Q. L. Xiu, K. J. Zhu, S. Q. Zhang, W. G. Li, A. G. Denig, Y. K. Sun, Tao Luo, A. Hafner, X. L. Gao, Y. Z. Sun, X. N. Ma, B. X. Yu, S. Spataro, Q. Ouyang, Zhi Zeng, Y. Y. Liu, C. Dong, S. Sosio, S. S. Fang, Y. K. Heng, Y. B. Liu, F. Y. Li, H. S. Chen, Alperen Yuncu, Jin Li, Gang Zhao, J. M. Bian, S. J. Zhao, X. P. Xu, X. B. Ji, H. M. Liu, M. Tiemens, Joachim Pettersson, H. L. Dai, Manuel Lara, M. Fritsch, T. Holtmann, J. Y. Liu, M. Kavatsyuk, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, Q. J. Xu, G. F. Cao, O. Dorjkhaidav, J. C. Chen, Xuanhong Lou, Q. Gao, Y. N. Gao, F. H. Liu, Y. Zhang, Nicolas Berger, P. Patteri, Nasser Kalantar-Nayestanaki, Y. X. Zhou, Yuehong Xie, B. X. Zhang, C. Morales Morales, Yue Pan, J. W. Zhang, M. G. Zhao, Y. H. Yang, R. P. Guo, X. Q. Hao, F. Li, F. C. Ma, J. F. Qiu, P. Larin, L. Fava, F. Nerling, M. Alekseev, G. Li, C. Q. Feng, X. R. Chen, Z. Y. Deng, M. Ripka, Xingguo Li, F. A. Harris, R. Kliemt, H. Leithoff, Jie Yu, T. J. Min, G. Cibinetto, S. Qian, Q. An, Jialun Ping, K. Zhang, X. Y. Zhang, J. B. Liu, Y. J. Sun, E. Boger, H. R. Qi, Y. P. Guo, Serkant Ali Cetin, G. F. Xu, J. B. Jiao, S. Jin, H. B. Li, B. Kloss, C. L. Luo, C. C. Zhang, X. Y. Song, B. Zhong, L. B. Guo, Lei Li, K. Goetzen, T. Ma, L. D. Liu, J. J. Xu, J. S. Huang, C. X. Liu, A. Calcaterra, Z. G. Zhao, S. Fegan, F. De Mori, X. Y. Zhou, H. H. Zhang, X. F. Wang, Z. J. Sun, H. Loehner, Q. M. Ma, X. Y. Niu, X. H. Mo, L. S. Wang, Y. Yuan, Y. S. Zhu, Yu Zhang, M. H. Ye, H. H. Liu, Q. Liu, Tristan Weber, L. L. Wang, H. Cai, J. C. Li, L. L. Ma, L. Gong, J. Zhuang, Ts Tsednee, L. G. Xia, A. Amoroso, M. X. Luo, I. B. Nikolaev, J. H. Yin, D. V. Dedovich, M. Shao, Y. T. Gu, A. Dbeyssi, L. H. Wu, M. Kornicer, M. Savrie, A. Julin, E. Fioravanti, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, Y. J. Xiao, J. S. Lange, L. Y. Dong, W. J. Zheng, Z. H. Wang, P. Musiol, C. Schnier, Y. Q. Wang, X. T. Huang, G. Rong, X. A. Xiong, A. A. Zafar, V. Prasad, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, X. R. Zhou, Cheng Li, K. H. Rashid, Y. T. Liang, S. J. Chen, K. J. Li, Xichao Ruan, M. H. Gu, H. Y. Sheng, C. X. Yu, B. Zheng, R. G. Ping, X. K. Chu, Peilian Liu, and Lingxuan Zhang
Subjects: Physics, 010308 nuclear & particles physics, Electron–positron annihilation, Sigma, 01 natural sciences, Gamma gamma, Nuclear physics, Angular distribution, 0103 physical sciences, Radiative transfer, High Energy Physics::Experiment, Invariant mass, 010306 general physics, Bar (unit)
Abstract: The decay J/psi -> gamma gamma phi is studied using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector. Two structures around 1475 MeV/c(2) and 1835 MeV/c(2) are observed in the gamma phi invariant mass spectrum for the first time. With a fit on the gamma phi invariant mass, which takes into account the interference between the two structures, and a simple analysis of the angular distribution, the structure around 1475 MeV/c(2) is found to favor an assignment as the eta(1475) and the mass and width for the structure around 1835 MeV/c(2) are consistent with the X(1835). The statistical significances of the two structures are 13.5 sigma and 6.3 sigma, respectively. The results indicate that both eta(1475) and X(1835) contain a sizeable s (s) over bar component.
Published: 2018

4. Observation of $a^{0}_{0}(980)$-$f_{0}(980)$ Mixing

Author: M, Ablikim, M N, Achasov, S, Ahmed, M, Albrecht, M, Alekseev, A, Amoroso, F F, An, Q, An, J Z, Bai, Y, Bai, O, Bakina, R, Baldini Ferroli, Y, Ban, D W, Bennett, J V, Bennett, N, Berger, M, Bertani, D, Bettoni, J M, Bian, F, Bianchi, E, Boger, I, Boyko, R A, Briere, H, Cai, X, Cai, O, Cakir, A, Calcaterra, G F, Cao, S A, Cetin, J, Chai, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, X R, Chen, Y B, Chen, X K, Chu, G, Cibinetto, H L, Dai, J P, Dai, A, Dbeyssi, D, Dedovich, Z Y, Deng, A, Denig, I, Denysenko, M, Destefanis, F, De Mori, Y, Ding, C, Dong, J, Dong, L Y, Dong, M Y, Dong, O, Dorjkhaidav, Z L, Dou, S X, Du, P F, Duan, J, Fang, S S, Fang, X, Fang, Y, Fang, R, Farinelli, L, Fava, S, Fegan, F, Feldbauer, G, Felici, C Q, Feng, E, Fioravanti, M, Fritsch, C D, Fu, Q, Gao, X L, Gao, Y, Gao, Y G, Gao, Z, Gao, B, Garillon, I, Garzia, K, Goetzen, L, Gong, W X, Gong, W, Gradl, M, Greco, M H, Gu, S, Gu, Y T, Gu, A Q, Guo, L B, Guo, R P, Guo, Y P, Guo, Z, Haddadi, S, Han, X Q, Hao, F A, Harris, K L, He, X Q, He, F H, Heinsius, T, Held, Y K, Heng, T, Holtmann, Z L, Hou, C, Hu, H M, Hu, T, Hu, Y, Hu, G S, Huang, J S, Huang, S H, Huang, X T, Huang, X Z, Huang, Z L, Huang, T, Hussain, W, Ikegami Andersson, Q, Ji, Q P, Ji, X B, Ji, X L, Ji, X S, Jiang, X Y, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, Y, Jin, T, Johansson, A, Julin, N, Kalantar-Nayestanaki, X L, Kang, X S, Kang, M, Kavatsyuk, B C, Ke, T, Khan, A, Khoukaz, P, Kiese, R, Kliemt, L, Koch, O B, Kolcu, B, Kopf, M, Kornicer, M, Kuemmel, M, Kuhlmann, A, Kupsc, W, Kühn, J S, Lange, M, Lara, P, Larin, L, Lavezzi, H, Leithoff, C, Leng, C, Li, Cheng, Li, D M, Li, F, Li, F Y, Li, G, Li, H B, Li, H J, Li, J C, Li, Jin, Li, K, Li, K J, Li, Lei, Li, P L, Li, P R, Li, Q Y, Li, T, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, D X, Lin, B, Liu, B J, Liu, C X, Liu, D, Liu, F H, Liu, Fang, Liu, Feng, Liu, H B, Liu, H H, Liu, H M, Liu, J B, Liu, J Y, Liu, K, Liu, K Y, Liu, Ke, Liu, L D, Liu, P L, Liu, Q, Liu, S B, Liu, X, Liu, Y B, Liu, Z A, Liu, Zhiqing, Liu, Y F, Long, X C, Lou, H J, Lu, J G, Lu, Y, Lu, Y P, Lu, C L, Luo, M X, Luo, X L, Luo, X R, Lyu, F C, Ma, H L, Ma, L L, Ma, M M, Ma, Q M, Ma, T, Ma, X N, Ma, X Y, Ma, Y M, Ma, F E, Maas, M, Maggiora, Q A, Malik, Y J, Mao, Z P, Mao, S, Marcello, Z X, Meng, J G, Messchendorp, G, Mezzadri, J, Min, T J, Min, R E, Mitchell, X H, Mo, Y J, Mo, C, Morales Morales, G, Morello, N Yu, Muchnoi, H, Muramatsu, A, Mustafa, Y, Nefedov, F, Nerling, I B, Nikolaev, Z, Ning, S, Nisar, S L, Niu, X Y, Niu, S L, Olsen, Q, Ouyang, S, Pacetti, Y, Pan, M, Papenbrock, P, Patteri, M, Pelizaeus, J, Pellegrino, H P, Peng, K, Peters, J, Pettersson, J L, Ping, R G, Ping, A, Pitka, R, Poling, V, Prasad, H R, Qi, M, Qi, S, Qian, C F, Qiao, N, Qin, X S, Qin, Z H, Qin, J F, Qiu, K H, Rashid, C F, Redmer, M, Richter, M, Ripka, M, Rolo, G, Rong, Ch, Rosner, A, Sarantsev, M, Savrié, C, Schnier, K, Schoenning, W, Shan, M, Shao, C P, Shen, P X, Shen, X Y, Shen, H Y, Sheng, J J, Song, W M, Song, X Y, Song, S, Sosio, C, Sowa, S, Spataro, G X, Sun, J F, Sun, L, Sun, S S, Sun, X H, Sun, Y J, Sun, Y K, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, G Y, Tang, X, Tang, I, Tapan, M, Tiemens, B T, Tsednee, I, Uman, G S, Varner, B, Wang, B L, Wang, D, Wang, D Y, Wang, Dan, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, W P, Wang, X F, Wang, Y, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z H, Wang, Z Y, Wang, T, Weber, D H, Wei, J H, Wei, P, Weidenkaff, S P, Wen, U, Wiedner, M, Wolke, L H, Wu, L J, Wu, Z, Wu, L, Xia, Y, Xia, D, Xiao, H, Xiao, Y J, Xiao, Z J, Xiao, X H, Xie, Y G, Xie, Y H, Xie, X A, Xiong, Q L, Xiu, G F, Xu, J J, Xu, L, Xu, Q J, Xu, Q N, Xu, X P, Xu, L, Yan, W B, Yan, W C, Yan, Y H, Yan, H J, Yang, H X, Yang, L, Yang, Y H, Yang, Y X, Yang, M, Ye, M H, Ye, J H, Yin, Z Y, You, B X, Yu, C X, Yu, J S, Yu, C Z, Yuan, Y, Yuan, A, Yuncu, A A, Zafar, Y, Zeng, Z, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J L, Zhang, J Q, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, K, Zhang, L, Zhang, S Q, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Y T, Zhang, Yu, Zhang, Z H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, J W, Zhao, J Y, Zhao, J Z, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, Y B, Zhao, Z G, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, W J, Zheng, Y H, Zheng, B, Zhong, L, Zhou, X, Zhou, X K, Zhou, X R, Zhou, X Y, Zhou, J, Zhu, K, Zhu, K J, Zhu, S, Zhu, S H, Zhu, X L, Zhu, Y C, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, and J H, Zou
Subjects: Subatomär fysik, High Energy Physics - Experiment (hep-ex), Physics and Astronomy (all), Subatomic Physics, FOS: Physical sciences, ddc:530, NO, High Energy Physics - Experiment
Abstract: Physical review letters 121(2), 022001 (2018). doi:10.1103/PhysRevLett.121.022001, We report the first observation of $a^{0}_{0}(980)$-$f_{0}(980)$ mixing in the decays of $J/\psi\to\phi f_{0}(980)\to\phi a^{0}_{0}(980)\to\phi\eta\pi^{0}$ and $\chi_{c1}\to a^{0}_{0}(980)\pi^{0}\to f_{0}(980)\pi^{0}\to\pi^{+}\pi^{-}\pi^{0}$, using data samples of $1.31\times10^{9}$ $J/\psi$ events and $4.48\times10^{8}$ $\psi(3686)$ events accumulated with the BESIII detector. The signals of $f_{0}(980)\to a^{0}_{0}(980)$ and $a^{0}_{0}(980)\to f_{0}(980)$ mixing are observed at levels of statistical significance of $7.4\sigma$ and $5.5\sigma$, respectively. The corresponding branching fractions and mixing intensities are measured and the constraint regions on the coupling constants, $g_{a_{0}K^{+}K^{-}}$ and $g_{f_{0}K^{+}K^{-}}$, are estimated. The results improve the understanding of the nature of $a^{0}_{0}(980)$ and $f_{0}(980)$., Published by APS, College Park, Md.
Published: 2018

5. Study of J/ψ and ψ(3686) decays to π+π−η′

Author: A. G. Denig, C. L. Luo, C. C. Zhang, B. Zhong, L. B. Guo, Jin Li, R. Kliemt, P. L. Li, J. Pellegrino, M. Maggiora, J. Zhu, H. Muramatsu, Ulrich Wiedner, Ling Zhao, Kai Liu, Z. X. Meng, X. A. Xiong, Lei Zhao, Z. L. Hou, T. Ma, Jie Yu, Klaus Peters, S. J. Chen, Z. H. Wang, M. G. Zhao, R. P. Guo, Y. H. Xie, W. G. Li, Y. H. Zheng, Cong-Feng Qiao, T. J. Min, K. J. Zhu, Y. K. Sun, J. C. Li, L. Zhang, Y. Nefedov, M. Richter, Z. Ning, P. Musiol, C. F. Redmer, C. Schnier, Bibo Ke, W. B. Yan, Q. P. Ji, Y. Ding, G. Cibinetto, Yunlong Zhang, G. Felici, S. Spataro, X. P. Xu, J. Zhuang, X. T. Huang, A. A. Zafar, G. Rong, V. Prasad, S. Han, L. H. Wu, M. Savrie, Yi Jin, L. Xia, Y. J. Xiao, N. Yu. Muchnoi, X. S. Kang, Y. Y. Liu, H. J. Lu, J. G. Lu, M. X. Luo, Yaquan Fang, D. Y. Liu, J. B. Jiao, B. J. Liu, J. M. Bian, S. J. Zhao, M. H. Gu, Y. H. Zhang, M. N. Achasov, D. Bettoni, C. Z. Yuan, D. V. Dedovich, S. Pacetti, Lei Li, H. M. Liu, J. L. Zhang, R. Poling, Cui Li, M. Kuhlmann, H. Y. Sheng, S. Q. Zhang, Y. X. Xia, S. H. Zhu, Q. J. Xu, X. L. Ji, G. A. Chelkov, W. Kühn, Jianping Zheng, S. L. Niu, C. X. Yu, G. F. Cao, P. L. Wang, F. De Mori, Ke Wang, Z. Y. You, S. Zhu, R. Farinelli, Z. Y. Wang, J. C. Chen, H. J. Li, F. E. Maas, Z. A. Zhu, Talib Hussain, F. Y. Li, Bingxuan Liu, X. Q. Li, Y. F. Long, M. Greco, Ke Li, A. Q. Guo, Nasser Kalantar-Nayestanaki, B. Zheng, R. G. Ping, A. Calcaterra, Z. G. Zhao, S. Fegan, Guangshun Huang, C. Morales Morales, Q. L. Xiu, Z. T. Sun, Z. A. Liu, H. L. Ma, T. Hu, S. Gu, X. Y. Zhou, F. Feldbauer, G. Li, L. Yan, D. M. Li, P. F. Duan, Z. G. Wang, H. H. Zhang, H. Y. Zhang, Z. J. Sun, C. P. Shen, M. Destefanis, Y. Ban, P. Weidenkaff, F. H. Heinsius, K. Schoenning, Q. Y. Li, B. S. Zou, G. R. Liao, L. J. Wu, A. Yuncu, X. K. Zhou, X. L. Luo, H. Leithoff, K. Y. Liu, Z. B. Li, W. Ikegami Andersson, G. Y. Tang, S. Qian, Jialun Ping, Jie Zhao, K. Zhang, G. F. Chen, X. Y. Zhang, C. D. Fu, Z. J. Xiao, Gianfranco Morello, Fenfen An, L. Zotti, S. P. Wen, M. Pelizaeus, X. S. Qin, F. Li, Y. G. Xie, C. Hu, Y. J. Mo, X. F. Wang, F. C. Ma, Niklaus Berger, G. Mezzadri, W. P. Wang, Y. B. Liu, Fang Liu, Q. M. Ma, O. Bakina, I. Denysenko, B. L. Wang, J. Y. Zhang, Y. F. Wang, D. X. Lin, B. Q. Wang, W. C. Yan, H. M. Hu, M. Lara, Z. H. Qin, J. B. Liu, X. R. Zhou, C. Q. Feng, A. Mustafa, X. R. Chen, Cheng Li, Z. Y. Deng, S. Ahmed, X. Tang, Y. X. Yang, Y. J. Sun, E. Boger, F. Bianchi, X. Q. He, S. X. Du, X. Y. Niu, Y. P. Lu, Z. L. Dou, B. Y. Zhang, X. Y. Ma, W. X. Gong, Jia-Jia Qin, J. W. Zhang, T. C. Zhao, Y. Yuan, Y. S. Zhu, Yu Zhang, Y. K. Heng, Xingguo Li, Xiaozhong Huang, M. Rolo, H. S. Chen, T. Weber, J. F. Qiu, Q. Liu, X. K. Chu, P. X. Shen, M. Y. Dong, J. Z. Bai, F. A. Harris, Q. Zhao, Y. Z. Sun, L. Koch, M. Kuemmel, X. H. Sun, M. Tiemens, Z. Wu, X. D. Ruan, L. L. Ma, L. Gong, L. Fava, A. Amoroso, J. H. Zou, I. Uman, Andrzej Kupsc, Xiang Zhou, Zhiqing Liu, M. L. Chen, Liqing Xu, X. Y. Shen, A. Khoukaz, Gang Zhao, L. P. Zhou, Y. M. Ma, R. Baldini Ferroli, P. Kiese, S. L. Olsen, R. A. Briere, Zhiqing Zhang, P. Larin, T. Johansson, J. F. Chang, S. S. Sun, X. Liu, H. R. Qi, Q. Ouyang, T. Holtmann, X. B. Ji, A. Dbeyssi, M. Kornicer, K. J. Li, S. S. Fang, Xiao-Rui Lyu, Y. G. Gao, G. S. Varner, X. S. Jiang, A. Julin, J. Y. Liu, Serkant Ali Cetin, R. E. Mitchell, X. L. Gao, P. Patteri, Z. P. Mao, Q. A. Malik, Dan Wang, Peilian Liu, X. N. Li, O. B. Kolcu, X. Cai, L. Lavezzi, J. F. Sun, Y. J. Mao, H. X. Yang, I. Garzia, C. Dong, C. Leng, O. Cakir, S. Sosio, Q. Gao, Y. N. Gao, Zhiyong Zhang, Haiping Peng, X. C. Lou, X. Q. Hao, Magnus Wolke, Huihui Liu, J. P. Liu, S. Marcello, Y. Zeng, Y. F. Liang, D. P. Jin, J. Fang, Tao Li, Joachim Pettersson, J. Q. Zhang, J. G. Messchendorp, B. X. Yu, Zhi Zeng, J. P. Dai, Dayong Wang, N. Qin, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Y. H. Yang, Qiunan Xu, J. J. Song, Z. Gao, L. Sun, X. H. Mo, L. S. Wang, H. L. Dai, Igor Boyko, Ch. Rosner, M. H. Ye, H. Liang, I. B. Nikolaev, L. L. Wang, H. Cai, Ke Liu, J. H. Yin, K. H. Rashid, M. Shao, Y. T. Gu, E. Fioravanti, H. B. Liu, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, L. D. Liu, L. Y. Dong, W. J. Zheng, F. Nerling, X. N. Ma, Y. T. Liang, M. Fritsch, M. Kavatsyuk, O. Dorjkhaidav, B. X. Zhang, M. Bertani, L. Yang, J. J. Xu, Yao Wang, T. Khan, J. S. Huang, X. Fang, Z. L. Huang, Feng Liu, C. X. Liu, M. Ablikim, W. Gradl, M. Ripka, D. Y. Wang, J. Min, B. Kopf, K. L. He, Jun-Yi Zhang, Y. P. Guo, Z. P. Zhang, M. Z. Wang, Jimin Zhao, D. W. Bennett, Zujian Wang, Y. Bai, M. Qi, G. F. Xu, H. J. Yang, S. Jin, C. Sowa, Y. B. Zhao, W. Shan, J. Dong, S. B. Liu, Y. Q. Wang, S. Nisar, C. J. Tang, Y. Hu, X. Y. Song, D. Xiao, X. Y. Jiang, M. M. Ma, Zahra Haddadi, Y. Pan, J. Chai, G. X. Sun, J. V. Bennett, K. Goetzen, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Y. Zhang, Q. An, Y. X. Zhou, A. Zhemchugov, I. Tapan, Y. H. Yan, J. W. Zhao, Y. C. Zhu, H. Xiao, T. Held, M. Albrecht, W. D. Li, B. T. Tsednee, and H. B. Li
Subjects: Physics, Particle physics, Annihilation, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, Analytical chemistry, Sigma, Lambda, 01 natural sciences, 0103 physical sciences, Pi, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: Using the data samples of 1.31 x 10(9) J/psi events and 4.48 x 10(8) psi(3686) events collected with the BESIII detector, partial wave analyses on the decays J/psi and psi(3686) pthornp -> pi(+)pi(-)eta' are performed with a relativistic covariant tensor amplitude approach. The dominant contribution is found to be J/psi and psi(3686) decays to rho eta' In the J/psi decay, the branching fraction B(J/psi -> rho eta') is determined to be (7.90 +/- 0.19(stat) +/- 0.49(sys)) x 10(-5). Two solutions are found in the psi(3686) decay, and the corresponding branching fraction B(psi(3686) -> rho eta') is (1.02 +/- 0.11(stat) +/- 0.24(sys)) x 10(-5) for the case of destructive interference, and (5.69 +/- 1.28(stat) +/- 2.36(sys)) x 10(-6) for constructive interference. As a consequence, the ratios of branching fractions between psi(3686) and J/psi decays to rho eta' are calculated to be (12.9 +/- 1.4(stat) +/- 3.1(sys))% and (7.2 +/- 1.6(stat) +/- 3.0(sys))%, respectively. We also determine the inclusive branching fractions of J/psi and psi(3686) decays to pi(+)pi(-)eta' to be (1.36 +/- 0.02(stat) +/- 0.08(sys)) x 10(-4) and (1.51 +/- 0.14(stat)) +/- 0.23(sys)) x 10(-5), respectively.
Published: 2017

6. Improved measurements of two-photon widths of the χcJ states and helicity analysis for χc2→γγ

Author: X. Y. Zhou, M. Bertani, L. J. Wu, L. Yang, Y. J. Mo, X. F. Wang, A. Yuncu, K. Goetzen, X. K. Zhou, D. Liu, Q. M. Ma, A. Mustafa, W. B. Yan, W. Gradl, M. Ripka, D. Bettoni, X. Y. Niu, C. Sowa, J. L. Zhang, Y. Yuan, Y. S. Zhu, I. Uman, T. Weber, D. Y. Wang, Yu Zhang, M. Kuemmel, W. Shan, S. Zhu, Q. P. Ji, Y. Q. Wang, M. L. Chen, S. Nisar, C. J. Tang, Y. Hu, Liqing Xu, G. Chelkov, P. L. Li, M. H. Gu, Y. P. Lu, L. Yan, Y. J. Mao, P. Larin, H. X. Yang, K. J. Zhu, X. Y. Shen, I. Garzia, D. Xiao, L. Koch, C. Leng, Kai Liu, M. Destefanis, M. Qi, A. Khoukaz, H. J. Yang, Z. G. Zhao, W. P. Wang, Q. Liu, X. D. Ruan, L. L. Ma, L. Gong, G. S. Huang, A. Amoroso, L. Zhang, Y. J. Sun, A. Dbeyssi, G. F. Xu, M. Kornicer, Y. Pan, R. Baldini Ferroli, A. Julin, S. Jin, R. Kliemt, J. B. Jiao, Huihui Liu, J. P. Liu, M. Albrecht, X. Y. Jiang, Dan Wang, H. Y. Sheng, S. B. Liu, Y. K. Heng, J. Q. Zhang, Y. Nefedov, M. M. Ma, Bibo Ke, C. Hu, X. Tang, Y. Ding, X. L. Gao, J. G. Messchendorp, W. D. Li, M. N. Achasov, B. J. Liu, Zahra Haddadi, C. X. Yu, V. Prasad, Y. X. Xia, S. H. Zhu, B. T. Tsednee, X. N. Ma, Zhenan Liu, Y. T. Liang, X. Y. Song, M. Rolo, Y. T. Zhang, J. P. Dai, S. Q. Zhang, Y. H. Zhang, S. Pacetti, Q. Ouyang, J. C. Li, Jie Yu, Talib Hussain, J. F. Sun, H. J. Lu, Cui Li, Q. An, B. Zheng, R. G. Ping, Qiunan Xu, J. J. Xu, Y. X. Zhou, X. S. Jiang, L. S. Wang, J. Chai, W. Kühn, G. X. Sun, J. V. Bennett, Ming Shao, X. R. Zhou, Z. Y. You, Z. A. Zhu, S. Marcello, F. E. Maas, M. Fritsch, D. P. Jin, I. Tapan, J. Pellegrino, Y. Zeng, X. K. Chu, W. G. Li, J. S. Huang, M. X. Luo, C. X. Liu, D. V. Dedovich, Ke Li, S. Han, Y. H. Yan, Sen Qian, S. Gu, O. Bakina, M. Kavatsyuk, Z. Jiao, Fu-Hu Liu, D. H. Zhang, L. L. Wang, H. Cai, G. F. Chen, G. Y. Tang, H. L. Dai, M. Maggiora, J. Zhu, Ling Zhao, R. Poling, P. F. Duan, J. Y. Zhang, M. H. Ye, Q. A. Malik, S. Spataro, X. P. Xu, Gianfranco Morello, L. Zhou, Y. Y. Liu, P. X. Shen, Jie Zhao, D. X. Lin, C. Dong, H. M. Hu, J. B. Liu, A. Zhemchugov, S. Sosio, Fenfen An, B. L. Wang, C. P. Shen, Fang Liu, O. Dorjkhaidav, B. Kopf, B. Y. Zhang, I. Denysenko, Xiaozhong Huang, Jun-Yi Zhang, Y. P. Guo, K. L. He, S. X. Du, Xiaofeng Zhu, J. Z. Zhang, Y. H. Yang, T. J. Min, T. C. Zhao, Z. P. Zhang, L. D. Liu, B. X. Zhang, Zhiqing Zhang, L. H. Wu, H. Xiao, Lei Zhao, Z. L. Hou, J. J. Song, G. Cibinetto, Z. L. Dou, L. Sun, X. Liu, H. R. Qi, Lei Li, Y. K. Sun, H. M. Liu, L. Y. Dong, Joachim Pettersson, Yunpeng Lu, Z. Gao, M. Z. Wang, Zhiyong Zhang, T. Held, G. Felici, K. J. Li, Z. H. Qin, J. Min, D. W. Bennett, Z. G. Wang, Xiao-Rui Lyu, W. J. Zheng, Z. Wu, Y. Bai, Serkant Ali Cetin, F. Nerling, M. Savrie, A. Calcaterra, Yi Jin, S. Fegan, Z. T. Sun, E. Boger, G. F. Cao, H. Y. Zhang, I. B. Nikolaev, Y. G. Gao, C. Z. Yuan, M. Kuhlmann, H. H. Zhang, J. P. Zheng, H. B. Liu, Y. Ban, P. Weidenkaff, F. H. Heinsius, Yao Wang, Jialun Ping, J. H. Zou, T. Khan, J. H. Yin, K. H. Rashid, K. Zhang, G. S. Varner, Y. T. Gu, Jin Li, B. X. Yu, X. Y. Zhang, H. B. Li, X. Cai, J. G. Lu, A. G. Denig, C. L. Luo, S. P. Wen, G. R. Liao, S. S. Sun, Y. J. Xiao, A. Q. Guo, H. S. Chen, C. C. Zhang, M. Lara, B. Zhong, L. B. Guo, Bingxuan Liu, X. S. Qin, B. Q. Wang, E. Fioravanti, Igor Boyko, H. Muramatsu, G. Li, Ulrich Wiedner, S. L. Niu, M. Y. Dong, J. Zhuang, T. Ma, X. C. Lou, O. B. Kolcu, R. E. Mitchell, C. Q. Feng, T. Hu, Y. B. Chen, Z. L. Huang, Feng Liu, Jia-Jia Qin, C. D. Fu, X. L. Kang, L. Xia, D. H. Wei, P. R. Li, M. Ablikim, J. S. Lange, X. R. Chen, Z. Y. Deng, X. H. Mo, Xingguo Li, Y. C. Zhu, M. G. Zhao, J. Z. Bai, R. P. Guo, Y. H. Xie, Andrzej Kupsc, X. B. Ji, M. Tiemens, P. Patteri, P. Musiol, C. F. Redmer, Y. G. Xie, J. M. Bian, C. Schnier, X. T. Huang, A. A. Zafar, S. J. Zhao, G. Rong, Z. X. Meng, X. A. Xiong, Q. J. Xu, J. C. Chen, W. X. Gong, Zhiqing Liu, Nasser Kalantar-Nayestanaki, C. Morales Morales, S. J. Chen, T. Johansson, F. C. Ma, Y. B. Zhao, Z. H. Wang, J. F. Qiu, L. Fava, S. Ahmed, Y. X. Yang, H. J. Li, Q. Zhao, Y. Z. Sun, J. Fang, Xiang Zhou, L. Lavezzi, X. L. Luo, Z. Zeng, F. Y. Li, X. Q. Li, Y. F. Long, M. Greco, Gang Zhao, T. Holtmann, X. Q. Hao, M. Ye, M. Richter, Y. F. Wang, H. P. Peng, P. L. Wang, J. Y. Liu, K. Y. Liu, Z. B. Li, Jing Dong, W. Ikegami Andersson, Q. Gao, Y. N. Gao, Y. Zhang, P. Kiese, S. L. Olsen, R. A. Briere, J. Z. Fan, X. Fang, Z. J. Xiao, P. L. Liu, H. Liang, L. Zotti, X. L. Ji, F. Bianchi, O. Cakir, X. Y. Ma, R. Farinelli, H. Leithoff, F. A. Harris, Q. L. Xiu, J. Z. Zhao, H. L. Ma, D. M. Li, M. Pelizaeus, J. W. Zhang, A. Sarantsev, X. H. Sun, Z. Wang, J. F. Chang, Magnus Wolke, Y. F. Liang, S. S. Fang, Dayong Wang, N. Qin, Y. B. Liu, Y. H. Zheng, Cong-Feng Qiao, N. Yu. Muchnoi, X. S. Kang, Z. Y. Wang, F. Feldbauer, Ke Wang, Ke Liu, X. N. Li, Yaquan Fang, K. Peters, J. W. Zhao, K. Schoenning, Q. Y. Li, B. S. Zou, Niklaus Berger, G. Mezzadri, F. Li, Cheng Li, X. Q. He, W. C. Yan, Y. M. Ma, Z. P. Mao, Tao Li, Z. J. Sun, Ch. Rosner, Zhe Ning, and F. De Mori
Subjects: Physics, Annihilation, 010308 nuclear & particles physics, 0103 physical sciences, Analytical chemistry, 010306 general physics, 01 natural sciences, Helicity, Gamma gamma
Abstract: Based on 448.1 x 10(6) Psi(3686) events collected with the BESIII detector, the decays Psi(3686) -> gamma chi(cJ), chi(cJ) -> gamma gamma(J = 0, 1, 2) are studied. The decay branching fractions of chi(c0,2) -> gamma gamma are measured to be B(chi(c0) -> gamma gamma) = (1.93 +/- 0.08 +/- 0.05 +/- 0.05) x 10(-4) and B(chi(c2) -> gamma gamma) = (3.10 +/- 0.09 +/- 0.07 +/- 0.11) x 10(-4) which correspond to two-photon decay widths of Gamma(gamma gamma)(chi(c0)) = 2.03 +/- 0.08 +/- 0.06 +/- 0.13 keV and Gamma(gamma gamma)(chi(c2)) = 0.60 +/- 0.02 +/- 0.01 +/- 0.04 keV with a ratio of R = Gamma(gamma gamma)(chi(c2))/Gamma(gamma gamma)(chi(c0)) = 0.295 +/- 0.014 +/- 0.007 +/- 0.027, where the uncertainties are statistical, systematic and associated with the uncertainties of B(Psi(3686) -> gamma chi(c0,2)) and the total widths Gamma(chi(c0,2)), respectively. For the forbidden decay of chi(c1) -> gamma gamma, no signal is observed, and an upper limit on the two-photon width is obtained to be Gamma(gamma gamma)(chi(c1)) gamma gamma is also measured to be f(0/2) = Gamma(lambda=0)(gamma gamma) (chi(c2))/Gamma(lambda=2)(gamma gamma) (chi(c2)) = (0.0 +/- 0.6 +/- 1.2) x 10(-2), where the uncertainties are statistical and systematic, respectively.
Published: 2017

7. Measurement of branching fractions for ψ(3686)→γη′ , γη , and γπ0

Author: A. Calcaterra, A. Q. Guo, G. Rong, R. Farinelli, H. L. Ma, R. Kliemt, D. M. Li, Zongyuan Wang, H. Muramatsu, X. Liu, M. Kuemmel, C. Leng, W. P. Wang, X. L. Ji, C. Sowa, A. Guskov, Y. B. Zhao, M. Pelizaeus, J. Libby, H. R. Qi, W. Shan, Z. H. Qin, L. J. Wu, J. Dong, Y. Q. Wang, Yaquan Fang, L. Koch, A. Khoukaz, Talib Hussain, S. Nisar, C. J. Tang, Y. Hu, X. Y. Shan, Jie Yu, J. Pellegrino, Y. P. Lu, Kai Liu, Z. A. Liu, Guo-Ming Chen, A. Pitka, Q. Ouyang, S. S. Fang, J. Zhu, Ling Zhao, W. M. Song, D. Xiao, Serkant Ali Cetin, Y. J. Mo, Jun-Yi Zhang, Yanwei Wang, Y. P. Guo, L. Zhang, Y. Nefedov, Z. G. Wang, M. H. Ye, Z. P. Zhang, Y. B. Liu, H. B. Li, X. Y. Jiang, M. M. Ma, J. C. Chen, Zahra Haddadi, Y. Pan, J. Chai, G. X. Sun, Z. Jiao, Fu-Hu Liu, D. H. Zhang, K. J. Zhu, D. Y. Liu, Dan Wang, R. Baldini Ferroli, D. W. Bennett, Zujian Wang, X. K. Zhou, Fang Liu, I. Denysenko, T. Holtmann, J. Y. Liu, C. L. Luo, A. Yuncu, Y. G. Xie, Zhiyong Zhang, K. Schoenning, Q. Y. Li, B. S. Zou, Niklaus Berger, Lei Zhao, Z. L. Hou, Y. J. Mao, H. X. Yang, I. Garzia, H. Y. Zhang, Haiwen Liu, Y. Bai, J. B. Jiao, Huanhuan Liu, G. Felici, W. C. Yan, J. Z. Bai, C. C. Zhang, Yuekun Heng, H. S. Chen, H. J. Lu, J. G. Lu, B. Zhong, H. Liang, I. B. Nikolaev, B. Garillon, Huihui Liu, S. X. Du, X. N. Li, J. Y. Zhang, Shun-Jia Huang, S. Q. Zhang, Z. L. Dou, B. Y. Zhang, J. F. Sun, F. Li, J. Q. Zhang, S. L. Niu, F. Y. Li, S. Marcello, Y. Zeng, Haiping Peng, F. E. Maas, T. Hu, Ulrich Wiedner, Cui Li, K. Goetzen, F. C. Ma, Q. Gao, Y. N. Gao, J. G. Messchendorp, M. Fritsch, J. H. Wei, L. D. Liu, M. Qi, Jianhao Zhang, A. Zhemchugov, L. Y. Dong, H. J. Li, Q. L. Xiu, Q. P. Ji, T. Ma, H. J. Yang, K. J. Li, Xiao-Rui Lyu, S. Gu, Liqing Xu, O. Bakina, Qiunan Xu, Bingxuan Liu, X. Q. Li, Y. F. Long, C. Z. Yuan, M. Greco, F. Bianchi, M. Kuhlmann, Jin Li, X. Y. Shen, S. Ahmed, Y. X. Yang, Kang Li, M. H. Gu, Y. G. Gao, W. J. Zheng, J. F. Qiu, Ke Liu, S. Qian, Jialun Ping, A. Amoroso, Yao Wang, Bibo Ke, W. B. Yan, W. G. Li, Y. K. Sun, P. L. Li, S. Spataro, X. P. Xu, Z. Y. Deng, K. Zhang, X. Y. Zhang, X. R. Chen, L. Fava, Xiaofeng Zhu, J. Z. Zhang, Y. H. Yang, J. J. Song, L. Sun, G. S. Varner, P. X. Shen, Y. Ding, Z. Wu, Gueorgui Chelkov, B. X. Yu, H. Y. Sheng, S. Pacetti, M. Lara, Q. Zhao, Dmitri Dedovich, Y. Z. Sun, Lei Li, P. L. Wang, B. J. Liu, D. Bettoni, Y. H. Zheng, F. Nerling, W. D. Li, Q. Liu, Cong-Feng Qiao, Yunlong Zhang, Zhiqing Zhang, K. Y. Liu, G. Mezzadri, Zhi Zeng, Yang Zhang, Xiang Zhou, Gang Zhao, Z. B. Li, W. Ikegami Andersson, H. Cai, X. Q. He, X. L. Luo, Y. J. Sun, B. T. Tsednee, M. G. Zhao, R. P. Guo, Y. H. Xie, J. P. Dai, Z. G. Zhao, S. Fegan, S. Jin, N. Yu. Muchnoi, Yao Zhang, G. Li, M. Ablikim, Sai-Juan Chen, Guangshun Huang, W. Kühn, Z. Y. You, Z. A. Zhu, C. D. Fu, T. Khan, L. Yan, M. Albrecht, Ke Li, C. Q. Feng, G. R. Liao, C. X. Yu, L. P. Zhou, X. S. Kang, M. Maggiora, J. H. Yin, K. H. Rashid, Y. M. Ma, J. L. Zhang, M. Shao, Y. T. Gu, Y. H. Zhang, J. J. Xu, I. Tapan, T. Weber, H. H. Zhang, Y. H. Yan, B. Q. Wang, S. J. Zhao, M. Y. Dong, Z. P. Mao, Y. F. Wang, L. L. Ma, J. W. Zhao, L. Gong, J. V. Bennett, C. P. Shen, Z. J. Sun, Y. C. Zhu, B. Zheng, R. G. Ping, Z. T. Sun, F. Feldbauer, Jianping Zheng, S. Zhu, M. Tiemens, Y. Zhang, H. B. Liu, J. S. Huang, Z. Y. Wang, J. Fang, Yi Chen, Z. L. Huang, Feng Liu, E. Fioravanti, Z. X. Meng, X. K. Chu, C. X. Liu, X. A. Xiong, Igor Boyko, Q. J. Xu, E. Boger, Z. Gao, X. Y. Ma, J. H. Zou, Xuanhong Lou, W. X. Gong, T. Held, J. C. Li, Xingguo Li, Nasser Kalantar-Nayestanaki, Ch. Rosner, X. Cai, S. B. Liu, G. F. Xu, A. Dbeyssi, S. S. Sun, C. Morales Morales, J. Zhuang, A. Sarantsev, G. F. Cao, D. H. Wei, P. R. Li, Ke Wang, J. S. Lange, A. Denig, M. X. Luo, X. H. Sun, X. S. Qin, X. N. Ma, Y. T. Liang, H. Leithoff, P. Weidenkaff, F. H. Heinsius, Klaus Peters, X. Y. Song, L. Yang, Orhan Cakir, P. Kiese, P. F. Duan, J. B. Liu, S. L. Olsen, R. E. Mitchell, Y. Ban, Gianfranco Morello, M. L. Chen, S. P. Wen, B. L. Wang, M. Kavatsyuk, T. C. Zhao, M. N. Achasov, X. S. Jiang, X. R. Zhou, O. Dorjkhaidav, Cheng Li, X. L. Gao, B. X. Zhang, M. Kornicer, M. Destefanis, Y. T. Tan, Q. A. Malik, X. B. Ji, W. Gradl, R. A. Briere, A. Julin, C. Dong, P. Patteri, S. Sosio, M. Ripka, X. H. Mo, L. S. Wang, F. De Mori, D. Y. Wang, Joachim Pettersson, J. Min, X. Y. Zhou, C. F. Redmer, B. Kopf, J. F. Hu, X. Tang, K. L. He, L. L. Wang, C. Schnier, R. Poling, M. Rolo, M. Z. Wang, Jimin Zhao, F. Cossio, X. T. Huang, Yu Zhang, A. A. Zafar, X. F. Wang, Q. M. Ma, V. Prasad, S. Han, A. Mustafa, X. Y. Niu, L. H. Wu, Y. Yuan, Y. S. Zhu, M. Bertani, M. Savrie, Yi Jin, L. Xia, Y. J. Xiao, T. Y. Qi, Y. X. Xia, S. H. Zhu, G. Cibinetto, I. Uman, P. Larin, G. Y. Tang, H. L. Dai, X. H. Xie, Jie Zhao, D. X. Lin, H. M. Hu, Q An, M. Alekseev, J. F. Chang, Magnus Wolke, Y. F. Liang, D. P. Jin, F. A. Harris, Zhiqing Liu, T. Johansson, Dayong Wang, N. Qin, O. B. Kolcu, Xiaozhong Huang, L. Lavezzi, X. Q. Hao, M. Richter, Z. Ning, Andrzej Kupsc, Michael Papenbrock, Z. J. Xiao, and F. F. An
Subjects: Physics, Electromagnetic calorimeter, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, High Energy Physics::Experiment, 010306 general physics, Branching (polymer chemistry), 01 natural sciences, Astrophysics::Galaxy Astrophysics
Abstract: Using a data sample of 448 x 10(6) psi(3686) events collected with the BESIII detector operating at the BEPCII storage ring, the decays psi(3686) -> gamma eta and psi(3686) -> gamma pi(0) are observed with a statistical significance of 7.3 sigma and 6.7 sigma, respectively. The branching fractions are measured to be B(psi(3686) -> gamma eta) = (0.85 +/- 0.18 +/- 0.05) x 10(-6) and B(psi(3686) ->gamma pi(0)) = (0.95 +/- 0.16 +/- 0.05) x 10(-6). In addition, we measure the branching fraction of psi(3686) -> gamma eta' to be B(psi(3686) -> gamma eta') = (125.1 +/- 2.2 +/- 6.2)x10(-6), which represents an improvement of precision over previous results.
Published: 2017

8. Evidence for e+e−→γηc(1S) at center-of-mass energies between 4.01 and 4.60 GeV

Author: Y. F. Wang, J. V. Bennett, X. Y. Ma, W. X. Gong, X. H. Sun, P. Larin, H. J. Lu, J. G. Lu, Yaquan Fang, Kai Liu, M. Kuemmel, F. E. Maas, Orhan Cakir, P. Kiese, S. L. Olsen, X. S. Jiang, R. Farinelli, S. L. Niu, F. Y. Li, X. Q. Li, Y. F. Long, M. Greco, X. N. Ma, T. Hu, K. Y. Liu, Z. B. Li, W. Ikegami Andersson, J. F. Chang, L. Zhang, S. Gu, D. Y. Liu, Y. Nefedov, J. B. Jiao, Y. T. Liang, H. L. Ma, D. M. Li, O. Bakina, Magnus Wolke, Yuekun Heng, Y. H. Zheng, K. J. Li, H. Muramatsu, Cong-Feng Qiao, Y. F. Liang, Xiao-Rui Lyu, K. Schoenning, Q. Y. Li, B. S. Zou, D. P. Jin, N. Yu. Muchnoi, X. S. Kang, Y. H. Zhang, Dan Wang, R. Kliemt, Cui Li, Z. Y. Wang, Yi Chen, P. X. Shen, X. K. Chu, Niklaus Berger, M. Pelizaeus, Dayong Wang, N. Qin, Z. Wu, J. Z. Bai, F. Feldbauer, G. Y. Tang, H. L. Dai, X. H. Xie, Gueorgui Chelkov, J. Pellegrino, Michael Papenbrock, Jie Zhao, D. X. Lin, H. M. Hu, J. Zhu, Ling Zhao, S. Q. Zhang, M. Albrecht, W. M. Song, M. Rolo, G. R. Liao, Lei Zhao, Y. G. Gao, Y. Ban, Z. L. Hou, Q An, Zhiqing Zhang, T. Holtmann, M. Fritsch, Q. Ouyang, M. Alekseev, B. Q. Wang, J. Y. Liu, Z. J. Xiao, T. Y. Qi, G. S. Varner, Jie Yu, Y. X. Xia, S. H. Zhu, J. F. Sun, J. Min, M. Kavatsyuk, C. Z. Yuan, H. B. Li, F. F. An, M. Kuhlmann, S. S. Fang, G. Cibinetto, A. Dbeyssi, S. Marcello, Guo-Ming Chen, Y. Zeng, C. L. Luo, M. N. Achasov, Q. Gao, Y. N. Gao, Ke Wang, B. Kopf, Jin Li, Y. Zhang, Xiaofeng Zhu, J. Z. Zhang, Y. H. Yang, J. J. Song, L. Sun, K. L. He, P. L. Li, A. Zhemchugov, Y. B. Liu, C. C. Zhang, O. Dorjkhaidav, X. L. Gao, T. J. Min, K. J. Zhu, M. Z. Wang, B. Zhong, L. B. Guo, M. G. Zhao, Jimin Zhao, S. Ahmed, Y. X. Yang, P. F. Duan, R. P. Guo, Y. H. Xie, Guangshun Huang, Gianfranco Morello, B. X. Zhang, L. Yan, A. Pitka, Q. A. Malik, Ulrich Wiedner, B. L. Wang, M. R. Shepherd, H. Liang, C. Dong, S. Sosio, Q. Zhao, Dmitri Dedovich, Y. Z. Sun, G. Felici, X. L. Ji, Xiang Zhou, T. C. Zhao, I. B. Nikolaev, Xiaozhong Huang, Gang Zhao, T. Ma, M. H. Ye, Andrzej Kupsc, Talib Hussain, Z. Y. Deng, A. Calcaterra, S. Qian, C. Leng, Jialun Ping, A. Amoroso, A. Q. Guo, G. Rong, J. P. Dai, K. Zhang, J. Q. Zhang, Z. G. Zhao, J. M. Bian, S. J. Zhao, Yanwei Wang, X. Y. Zhang, S. Fegan, A. Yuncu, Jianhao Zhang, X. B. Ji, Y. G. Xie, H. J. Li, M. Qi, J. H. Wei, S. X. Du, M. Lara, Ke Liu, H. H. Zhang, B. X. Yu, Z. L. Dou, H. J. Yang, Q. L. Xiu, P. Patteri, Q. J. Xu, X. Y. Jiang, Zhi Zeng, L. D. Liu, Joachim Pettersson, Z. J. Sun, Xuanhong Lou, M. M. Ma, J. C. Chen, H. Cai, Nasser Kalantar-Nayestanaki, L. Y. Dong, C. Morales Morales, Y. J. Sun, Z. G. Wang, F. Bianchi, H. Y. Zhang, Y. P. Lu, M. H. Gu, J. C. Li, Haiwen Liu, S. B. Liu, J. Y. Zhang, Zahra Haddadi, J. Zhuang, H. Y. Sheng, A. Denig, M. X. Luo, Y. Ding, L. Yang, Igor Boyko, M. Y. Dong, J. B. Liu, B. J. Liu, C. X. Yu, M. Tiemens, H. B. Liu, Y. Pan, Yao Wang, D. Bettoni, J. H. Zou, M. Destefanis, X. Cai, S. S. Sun, W. Gradl, W. Kühn, M. Ripka, X. S. Qin, J. Chai, D. Y. Wang, M. L. Chen, G. Mezzadri, Z. Y. You, W. J. Zheng, L. Koch, A. Khoukaz, B. Zheng, R. E. Mitchell, X. Q. He, Yu Zhang, Z. A. Zhu, G. X. Sun, R. G. Ping, Z. T. Sun, F. De Mori, L. P. Zhou, Y. M. Ma, Bingxuan Liu, S. Jin, R. Baldini Ferroli, Z. P. Mao, G. Li, C. P. Shen, M. Ablikim, Sai-Juan Chen, J. Fang, Tao Li, Z. Jiao, Fu-Hu Liu, D. H. Zhang, C. D. Fu, C. Q. Feng, Z. Gao, Ch. Rosner, F. Nerling, P. Weidenkaff, F. H. Heinsius, X. Y. Zhou, T. Khan, Xingguo Li, S. P. Wen, X. R. Zhou, R. Poling, Cheng Li, C. Sowa, Y. B. Zhao, W. Shan, X. N. Li, X. Fang, J. Dong, Peilian Liu, Zhiyong Zhang, X. F. Wang, Haiping Peng, Y. Q. Wang, S. Nisar, Z. L. Huang, Feng Liu, P. L. Wang, Q. M. Ma, C. J. Tang, X. L. Luo, Y. Hu, A. Mustafa, Z. A. Liu, X. H. Mo, L. S. Wang, Yunlong Zhang, D. Xiao, L. L. Wang, J. L. Zhang, Jianping Zheng, S. Zhu, X. Y. Niu, Jun-Yi Zhang, Y. P. Guo, Z. P. Zhang, J. H. Yin, K. H. Rashid, Y. Yuan, M. Shao, Y. T. Gu, Y. S. Zhu, M. Bertani, E. Fioravanti, D. W. Bennett, C. Hu, X. L. Kang, X. Tang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Zujian Wang, Y. Bai, X. Liu, L. J. Wu, Y. J. Mo, Z. H. Wang, H. R. Qi, H. S. Chen, T. Weber, Shun-Jia Huang, Q. P. Ji, Serkant Ali Cetin, Liqing Xu, X. Y. Shen, C. F. Redmer, C. Schnier, X. K. Zhou, Fang Liu, I. Denysenko, W. C. Yan, X. T. Huang, Q. Liu, K. Goetzen, B. Y. Zhang, A. A. Zafar, L. L. Ma, L. Gong, M. Kornicer, R. A. Briere, A. Julin, Bibo Ke, W. B. Yan, S. Pacetti, G. F. Xu, M. Maggiora, G. F. Cao, Ke Li, X. Y. Song, J. J. Xu, H. Leithoff, J. S. Huang, C. X. Liu, X. R. Chen, W. D. Li, B. T. Tsednee, Zhiqing Liu, T. Johansson, O. B. Kolcu, F. Li, L. Lavezzi, X. Q. Hao, I. Tapan, F. C. Ma, F. A. Harris, Y. H. Yan, M. Richter, Z. Ning, J. W. Zhao, V. Prasad, S. Han, Y. C. Zhu, W. P. Wang, H. Xiao, J. F. Qiu, E. Boger, T. Held, L. Fava, L. H. Wu, Z. H. Qin, M. Savrie, Yi Jin, W. G. Li, Y. K. Sun, L. Xia, Y. J. Xiao, S. Spataro, X. P. Xu, Lei Li, Y. J. Mao, H. X. Yang, I. Garzia, Z. X. Meng, X. A. Xiong, B. Garillon, Huihui Liu, J. G. Messchendorp, Klaus Peters, Qiunan Xu, and I. Uman
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Sigma, 01 natural sciences, Nuclear physics, Cross section (physics), 0103 physical sciences, High Energy Physics::Experiment, Center of mass, Born approximation, Nuclear Experiment, 010306 general physics
Abstract: We present first evidence for the process e(+)e(-) -> gamma eta(c)(1S) at six center-of-mass energies between 4.01 and 4.60 GeV using data collected by the BESIII experiment operating at BEPCII. We measure the Born cross section at each energy using a combination of twelve eta(c)(1S) decay channels. We also combine all six energies under various assumptions for the energy-dependence of the cross section. If the process is assumed to proceed via the Y(4260), we measure a peak Born cross section sigma(peak)(e(+)e(-) -> gamma eta(c)(1S)) = 2.11 +/- 0.49 (stat.) +/- 0.36 (syst.) pb with a statistical significance of 4.2 sigma.
Published: 2017

9. Branching fraction measurements of ψ(3686)→γχcJ

Author: P. L. Wang, X. L. Luo, Q. Liu, Tristan Weber, L. L. Ma, A. Q. Guo, X. Q. Hao, L. Gong, L. G. Xia, Andrzej Kupsc, M. L. Chen, Y. H. Xie, J. Pellegrino, P. Larin, Zhiqing Liu, W. P. Wang, A. Dbeyssi, L. J. Wu, M. Kornicer, M. Kuemmel, Y. F. Wang, D. Y. Liu, G. Li, Y. J. Mo, Ling Zhao, A. Julin, Lei Zhao, T. Johansson, J. F. Chang, H. J. Lu, J. G. Lu, Z. H. Qin, H. H. Liu, T. Hussain, X. Y. Ma, G. Y. Tang, O. B. Kolcu, W. X. Gong, Jia-Jia Qin, I. Uman, C. D. Fu, Z. J. Xiao, Q. P. Ji, I. R. Boyko, Manuel Lara, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, Z. L. Hou, J. C. Li, J. Zhuang, X. Cai, L. Lavezzi, F. E. Maas, T. Hu, I. Tapan, Y. H. Yan, R. Farinelli, H. L. Ma, D. M. Li, Liqing Xu, C. H. Li, X. H. Sun, F. H. Liu, Nicolas Berger, J. W. Zhang, Dan Wang, S. Gu, J. F. Sun, C. Q. Feng, X. R. Chen, Z. Y. Deng, M. Ripka, Y. J. Mao, H. X. Yang, I. Garzia, Magnus Wolke, Y. F. Liang, X. Y. Shen, D. P. Jin, J. Min, P. Kiese, Dayong Wang, N. Qin, H. B. Liu, M. Richter, Z. Ning, J. W. Zhao, Y. C. Zhu, O. Bakina, H. Liang, M. X. Luo, H. Muramatsu, M. Pelizaeus, Tao Luo, X. L. Gao, S. Marcello, Y. Zeng, Zhe Sun, R. A. Briere, T. Holtmann, F. Li, F. C. Ma, B. Kopf, J. P. Liu, Bibo Ke, D. V. Dedovich, Xingguo Li, C. Z. Yuan, H. R. Qi, J. G. Messchendorp, F. De Mori, Z. A. Liu, Q. Ouyang, G. S. Huang, X. S. Jiang, K. L. He, S. S. Fang, Y. Ding, B. J. Liu, S. B. Liu, J. Y. Liu, P. X. Shen, Z. Wu, X. Y. Zhou, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, X. K. Zhou, S. W. Han, Y. Nefedov, C. Dong, Y. B. Liu, Qiunan Xu, K. Goetzen, M. Kuhlmann, S. Sosio, Y. P. Guo, B. X. Yu, Zhi Zeng, J. J. Song, V. Prasad, W. Kühn, Xiao-Rui Lyu, W. B. Yan, H. Xiao, Zhiqing Zhang, S. Pacetti, Jimin Zhao, Q. Gao, Y. N. Gao, Y. X. Xia, Y. Zhang, P. L. Li, W. G. Li, A. G. Denig, T. Held, G. Felici, Y. K. Sun, Mario Greco, Z. Y. You, O. Cakir, S. Spataro, Y. X. Zhou, Y. Y. Liu, Serkant Ali Cetin, J. F. Qiu, X. F. Wang, J. Z. Bai, C. F. Redmer, Z. A. Zhu, Q. M. Ma, A. Mustafa, L. Fava, M. Bertani, Ke Liu, F. Y. Li, H. S. Chen, Q. A. Malik, G. Mezzadri, W. C. Yan, Alperen Yuncu, Jin Li, Z. Haddadi, L. Yang, Joachim Pettersson, G. S. Varner, H. M. Liu, F. Nerling, X. Y. Niu, Z. Gao, S. L. Niu, Y. Ban, P. Weidenkaff, H. J. Li, Y. Yuan, Y. S. Zhu, X. Q. Li, Yu Zhang, C. P. Shen, X. Q. He, H. L. Dai, Y. G. Gao, Q. L. Xiu, G. F. Cao, M. N. Achasov, L. P. Zhou, L. D. Liu, Y. F. Long, L. Zotti, Fang Liu, M. G. Zhao, Y. H. Yang, R. P. Guo, U. Wiedner, I. Denysenko, G. R. Liao, X. P. Xu, X. B. Ji, M. Tiemens, Y. M. Ma, B. Q. Wang, M. Maggiora, S. Ahmed, Y. X. Yang, M. Destefanis, C. Hu, A. Calcaterra, Z. G. Zhao, S. Fegan, Z. P. Mao, X. Tang, Ke Wang, C. Leng, P. Patteri, W. Gradl, S. P. Wen, J. Fang, Tao Li, J. J. Xu, K. Y. Liu, J. B. Jiao, H. H. Zhang, B. Y. Zhang, Z. J. Sun, G. A. Chelkov, D. Y. Wang, S. Q. Zhang, M. Qi, R. Kliemt, Z. B. Li, W. Ikegami Andersson, Q. Zhao, X. S. Qin, Y. Z. Sun, H. J. Yang, R. Poling, P. F. Duan, F. H. Heinsius, Z. G. Wang, Gianfranco Morello, Ch. Rosner, X. R. Zhou, X. L. Ji, Fenfen An, B. L. Wang, M. Y. Dong, Jie Yu, J. S. Huang, Cheng Li, C. X. Liu, T. C. Zhao, Yaquan Fang, Shou-hua Zhu, M. Albrecht, H. Y. Zhang, W. D. Li, T. J. Min, K. J. Zhu, Gang Zhao, J. H. Zou, Z. Y. Zhang, F. A. Harris, L. Koch, H. B. Li, S. S. Sun, H. Leithoff, G. Cibinetto, R. Baldini Ferroli, C. L. Luo, K. Schoenning, Q. Y. Li, B. S. Zou, J. Q. Zhang, Y. H. Zheng, Krisztian Peters, X. K. Chu, M. Z. Wang, Y. G. Xie, C. C. Zhang, B. T. Tsednee, B. Zhong, L. B. Guo, Yunlong Zhang, G. F. Chen, R. E. Mitchell, D. Bettoni, X. N. Li, J. Y. Zhang, Lei Li, J. L. Zhang, Haiping Peng, Z. L. Dou, Jianping Zheng, Cong-Feng Qiao, T. Ma, S. Zhu, N. Yu. Muchnoi, G. F. Xu, S. X. Du, S. Jin, Peilian Liu, Lingxuan Zhang, X. S. Kang, Y. H. Zhang, S. L. Olsen, Xichao Ruan, F. Bianchi, M. H. Gu, S. Qian, H. Y. Sheng, Q. An, Jialun Ping, A. Amoroso, C. X. Yu, Y. K. Heng, J. M. Bian, B. Zheng, R. G. Ping, X. Y. Song, Z. Y. Wang, K. Zhang, X. Y. Zhang, S. J. Zhao, J. B. Liu, Y. J. Sun, X. H. Liu, E. Boger, Y. P. Lu, Q. J. Xu, J. C. Chen, J. P. Dai, Xuanhong Lou, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, Yao Wang, T. Khan, X. Fang, F. Feldbauer, Z. L. Huang, Feng Liu, M. Ablikim, X. Y. Jiang, X. N. Ma, M. H. Ye, M. Fritsch, L. Y. Dong, M. Kavatsyuk, W. J. Zheng, I. B. Nikolaev, J. H. Yin, O. Dorjkhaidav, M. Shao, Y. T. Gu, B. X. Zhang, E. Fioravanti, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, X. H. Mo, L. S. Wang, L. L. Wang, H. Cai, L. H. Wu, M. Savrie, Y. J. Xiao, Z. H. Wang, P. Musiol, C. Schnier, Y. Q. Wang, X. T. Huang, G. Rong, X. A. Xiong, A. A. Zafar, C. Sowa, Y. B. Zhao, W. Shan, K. H. Rashid, J. Dong, Y. T. Liang, S. J. Chen, S. Nisar, K. J. Li, C. J. Tang, Y. Hu, D. Xiao, M. M. Ma, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, D. H. Zhang, Jun-Yi Zhang, Z. P. Zhang, D. W. Bennett, Zujian Wang, and Xiaozhong Huang
Subjects: Physics, Nuclear magnetic resonance, 010308 nuclear & particles physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences
Abstract: Using a sample of 106 million psi(3686) decays, the branching fractions of psi(3686) -> gamma chi(c0), psi(3686) -> gamma chi(c1), and psi(3686) -> gamma chi(c2) are measured with improved precision to be (9.389 +/- 0.014 +/- 0.332) %, (9.905 +/- 0.011 +/- 0.353) %, and (9.621 +/- 0.013 +/- 0.272) %, respectively, where the first uncertainties are statistical and the second ones are systematic. The product branching fractions of (psi 3686) -> gamma chi(c1), chi(c1) -> gamma J/psi (3686) -> gamma chi(c2), chi(c2) -> gamma J/psi and the branching fractions of chi(c1) -> gamma J/psi and chi(c2) -> gamma J/psi are also presented.
Published: 2017

10. Measurements of the absolute branching fractions forDs+→ηe+νeandDs+→η′e+νe

Author: H. J. Lu, J. G. Lu, Xiangdong Ruan, S. L. Niu, Q. Liu, Lei Zhao, F. Y. Li, X. Q. Li, Y. F. Long, L. L. Ma, L. Gong, L. Fava, F. E. Maas, M. Greco, T. Hu, A. Amoroso, O. Bakina, W. G. Li, P. L. Wang, X. L. Luo, A. Dbeyssi, J. H. Yin, Q. P. Ji, Y. J. Sun, P. X. Shen, Y. T. Gu, S. Spataro, X. P. Xu, Y. Y. Liu, K. Y. Liu, W. P. Wang, F. Bianchi, Z. L. Huang, Feng Liu, X. L. Ji, S. Ahmed, Y. X. Yang, Z. Wu, Zhigang Wang, L. W. Jiang, Lei Li, Z. B. Li, W. Ikegami Andersson, E. Fioravanti, M. Ablikim, G. A. Chelkov, L. J. Wu, Jun-Yi Zhang, A. Julin, Y. P. Guo, Zhiqing Zhang, X. Q. He, X. L. Gao, Jin Li, A. Zallo, X. L. Kang, A. Sarantsev, D. H. Wei, Q. Ouyang, Y. J. Mo, D. Liu, S. S. Fang, Y. B. Liu, Q. L. Xiu, G. F. Cao, J. S. Lange, Q. W. Zhao, A. Hafner, Q. Zhao, Zhe Zeng, P. Kiese, Y. Pan, M. H. Ye, H. H. Liu, Jia Xu, Y. Z. Sun, L. Zotti, Cheng Li, C. Hu, Xiang Zhou, X. Tang, F. De Mori, D. W. Bennett, Zujian Wang, X. A. Xiong, Z. T. Sun, M. Qi, Y. X. Xia, J. C. Li, S. L. Olsen, A. Yuncu, R. A. Briere, Yaquan Fang, Z. A. Liu, Zhiqing Liu, W. C. Yan, Jie Liu, L. D. Liu, X. N. Ma, I. Tapan, X. Y. Zhou, Gang Zhao, Y. T. Liang, Y. G. Xie, J. Zhuang, T. Weber, M. Shao, A. A. Zafar, S. B. Liu, Ke Wang, X. S. Jiang, Y. H. Guan, C. Leng, X. C. Lou, L. Y. Dong, M. X. Luo, Y. H. Yan, V. Prasad, S. X. Du, Y. Ban, T. Johansson, J. F. Chang, H. J. Yang, Z. G. Zhao, J. W. Zhao, W. J. Zheng, Yucheng Huang, D. V. Dedovich, Z. L. Dou, T. Holtmann, P. L. Li, G. Rong, P. Weidenkaff, F. H. Heinsius, W. M. Song, Y. C. Zhu, Kai Liu, X. F. Wang, K. H. Rashid, P. F. Duan, K. Schoenning, Q. Y. Li, Y. B. Zhao, O. Cakir, O. B. Kolcu, M. Fritsch, X. Cai, Q. M. Ma, Liqing Xu, X. Y. Shen, G. F. Xu, Klaus Peters, F. A. Harris, S. P. Wen, B. L. Wang, X. S. Qin, Q. Gao, Y. N. Gao, S. Jin, B. Kloss, W. Shan, Niklaus Berger, K. J. Zhu, Y. F. Wang, J. Z. Bai, J. Q. Zhang, E. H. Thorndike, M. Kavatsyuk, X. Y. Niu, T. Held, Y. Zhang, T. C. Zhao, Y. Yuan, Y. S. Zhu, Chi Zhang, M. G. Zhao, X. Q. Hao, S. J. Chen, R. P. Guo, Jie Zhao, D. X. Lin, H. M. Hu, H. Leithoff, G. S. Huang, Zhenghao Zhang, Z. H. Qin, Y. Nefedov, A. Zhemchugov, Y. Guo, Jia-Jia Qin, Jia-ju Zhang, Xiao-Rui Lyu, Y. Ding, B. S. Zou, I. B. Nikolaev, Y. Q. Wang, T. Hussain, F. C. Ma, X. Y. Ma, O. Dorjkhaidav, S. Nisar, C. J. Tang, Y. Hu, Y. P. Lu, D. J. Ambrose, Tao Luo, B. X. Zhang, Z. Ning, S. Han, Y. J. Mao, J. B. Liu, X. K. Chu, H. X. Yang, W. X. Gong, A. Calcaterra, S. Fegan, X. Y. Song, F. Feldbauer, I. Garzia, B. J. Liu, B. X. Yu, G. S. Varner, A. Q. Guo, D. Bettoni, X. H. Mo, Dan Wang, H. P. Peng, J. L. Zhang, R. Farinelli, M. Bertani, R. Poling, L. H. Wu, M. Savrie, D. Xiao, Cui Li, H. H. Zhang, Z. Haddadi, H. L. Ma, W. Kühn, Z. Y. You, X. Fang, M. Albrecht, S. H. Zhu, Z. A. Zhu, L. S. Wang, X. B. Ji, Jianping Zheng, J. P. Liu, J. F. Sun, J. F. Qiu, X. C. Chen, S. Zhu, S. Schumann, H. S. Chen, D. M. Li, Z. J. Sun, H. Loehner, B.Y. Wang, H. Xiao, L. Yang, Yao Wang, J. M. Bian, Zhenyu Zhang, S. J. Zhao, S. Marcello, Y. Zeng, P. Patteri, W. D. Li, Peilian Liu, X. Y. Jiang, Lingxuan Zhang, X. H. Sun, Jianhao Zhang, K. Goetzen, J. G. Messchendorp, M. Pelizaeus, H. L. Dai, Igor Boyko, L. L. Wang, H. Cai, Q. A. Malik, G. Mezzadri, M. M. Ma, J. P. Dai, F. Nerling, I. Uman, Bingxuan Liu, H. B. Li, M. Shi, J. Chai, W. Gradl, J. C. Chen, C. P. Shen, G. Cibinetto, X. R. Zhou, Yu Zhang, M. Destefanis, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, R. Baldini Ferroli, G. Li, M. Ripka, A. G. Denig, C. L. Luo, L. P. Zhou, Nasser Kalantar-Nayestanaki, P. Musiol, B. Y. Zhang, D. Y. Wang, C. C. Zhang, C. Morales Morales, Q. J. Xu, Y. M. Ma, Z. P. Mao, M. H. Gu, C. D. Fu, C. Dong, S. Sosio, P. Larin, J. Min, C. F. Redmer, Xiaocong Ai, B. Zhong, L. B. Guo, X. R. Chen, C. Schnier, X. T. Huang, Z. G. Wang, H. Y. Zhang, X. N. Li, Z. Y. Deng, Haiwen Liu, H. P. Cheng, L. Xia, J. Fang, Tao Li, Joachim Pettersson, B. Kopf, J. Liu, W. B. Yan, C. X. Yu, K. L. He, G. X. Sun, J. V. Bennett, H. Muramatsu, Xingguo Li, Ulrich Wiedner, Y. H. Zheng, Cong-Feng Qiao, G. F. Chen, X. K. Zhou, O. Albayrak, D. H. Zhang, Ch. Rosner, R. Kliemt, Z. Jiao, Fu-Hu Liu, C. Q. Feng, M. Z. Wang, Jimin Zhao, R. G. Ping, G. R. Liao, J. F. Hu, J. Y. Zhang, Jie Yu, Y. B. Li, N. Yu. Muchnoi, B. Zheng, X. S. Kang, Y. H. Zhang, M. Kornicer, T. Ma, Z. Gao, J. S. Huang, C. X. Liu, T. J. Min, Y. K. Heng, Z. Y. Wang, L. Yan, Y. T. Zhang, M. Maggiora, Ling Zhao, Z. L. Hou, H. Y. Sheng, C. Z. Yuan, X. Liu, H. R. Qi, Z. J. Xiao, Serkant Ali Cetin, J. B. Jiao, Jianmin Dong, S. Q. Zhang, Fang Liu, Q. An, I. Denysenko, S. Qian, Jialun Ping, K. Zhang, X. Y. Zhang, M. Lara, E. Boger, Hao-Lin Li, M. Y. Dong, M. Tiemens, H. B. Liu, J. H. Zou, S. S. Sun, R. E. Mitchell, Bibo Ke, M. N. Achasov, Giulietto Felici, S. Pacetti, Ke Li, H. Liang, P. L. Chen, F. F. An, Magnus Wolke, Y. F. Liang, D. P. Jin, Dayong Wang, N. Qin, Xiaozhong Huang, Andrzej Kupsc, W. L. Yuan, and M. L. Chen
Subjects: Physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Atomic physics, Nuclear Experiment, 010306 general physics, Branching (polymer chemistry), 01 natural sciences
Abstract: By analyzing 482 pb(-1) of e(+)e(-) collision data collected at root s = 4.009 GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions for the semileptonic decays D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e) to be B(D-s(+) -> eta e(+)nu(e)) = (2.30 +/- 0.31 +/- 0.08)% and B(D-s(+) -> eta ' e(+)nu(e)) = (0.93 +/- 0.30 +/- 0.05)%, respectively, and their ratio B(D-s(+) -> eta ' e(+)nu(e)) / B(D-s(+) -> eta ' e(+)nu(e)) = 0.40 +/- 0.14 +/- 0.02, where the first uncertainties are statistical and the second ones are systematic. The results are in good agreement with previous measurements within uncertainties; they can be used to determine the eta-eta' mixing angle and improve upon the D-s(+) semileptonic branching ratio precision.
Published: 2016

11. Observation ofJ/ψ→γηπ0

Author: F. Li, F. C. Ma, Yaquan Fang, M. Greco, M. Qi, Shou-hua Zhu, Bibo Ke, H. J. Yang, H. B. Li, B. Kloss, C. L. Luo, W. B. Yan, X. K. Zhou, J. F. Qiu, L. Fava, C. C. Zhang, B. Zhong, L. B. Guo, S. Pacetti, F. Nerling, K. Schoenning, Q. Y. Li, B. S. Zou, Lei Li, T. Ma, Yanping Huang, C. Hu, Magnus Wolke, X. Tang, R. Baldini Ferroli, Krisztian Peters, M. Z. Wang, Y. F. Liang, H. J. Lu, D. P. Jin, J. G. Lu, X. L. Ji, Y. F. Wang, Zhiqing Liu, Y. J. Mao, H. X. Yang, T. Hussain, X. N. Li, M. Y. Dong, F. De Mori, M. Bertani, Z. Haddadi, L. Yang, I. Garzia, Dayong Wang, N. Qin, X. Y. Ma, Haiping Peng, Z. Y. Zhang, W. X. Gong, P. L. Wang, T. Johansson, J. F. Chang, R. Kliemt, J. P. Liu, O. B. Kolcu, Y. H. Guan, J. G. Messchendorp, Ke Wang, I. Uman, J. H. Zou, F. E. Maas, T. Hu, H. H. Liu, W. Gradl, X. Y. Zhou, X. L. Li, Y. G. Xie, S. S. Sun, J. C. Li, K. J. Zhu, C. H. Li, F. A. Harris, X. Cai, G. Felici, H. Liang, X. H. Sun, Jie Yu, Z. J. Xiao, Z. P. Zhang, H. Leithoff, K. Goetzen, G. S. Huang, S. B. Liu, P. L. Chen, Q. P. Ji, G. A. Chelkov, T. J. Min, Z. L. Dou, Dan Wang, X. F. Wang, R. Poling, G. Cibinetto, A. Q. Guo, Q. M. Ma, P. F. Duan, F. H. Heinsius, W. M. Song, Yunlong Zhang, D. Y. Wang, Fenfen An, B. L. Wang, T. C. Zhao, D. Bettoni, W. P. Wang, P. Kiese, Z. H. Qin, Jia-Jia Qin, J. Zhuang, M. X. Luo, D. V. Dedovich, R. E. Mitchell, R. A. Briere, J. Pellegrino, H. J. Li, P. X. Shen, J. L. Zhang, S. Ahmed, Y. X. Yang, Z. Wu, Y. Nefedov, M. Shi, L. J. Wu, Q. L. Xiu, Fang Liu, Tao Luo, X. Y. Niu, X. S. Jiang, W. G. Li, A. G. Denig, Y. Yuan, Y. S. Zhu, Jianping Zheng, G. Li, J. Min, Yu Zhang, G. R. Liao, Xiao-Rui Lyu, S. Zhu, L. Zotti, Xiaozhong Huang, U. Wiedner, I. Denysenko, S. Spataro, M. Maggiora, Ling Zhao, Q. A. Malik, G. Mezzadri, W. C. Yan, X. Q. He, M. M. Ma, Y. Y. Liu, O. Cakir, Lei Zhao, Z. L. Hou, M. N. Achasov, Zhiqing Zhang, L. P. Zhou, A. Calcaterra, Z. G. Zhao, S. Fegan, Y. H. Zheng, Cong-Feng Qiao, H. M. Liu, O. Albayrak, C. D. Fu, B. X. Yu, Zhi Zeng, X. A. Xiong, J. F. Hu, C. Q. Feng, X. R. Chen, G. F. Cao, H. B. Liu, Q. Liu, Tristan Weber, Z. Y. Deng, M. Ripka, L. L. Ma, L. Gong, S. X. Du, Z. Gao, S. L. Niu, K. Y. Liu, X. Q. Li, Y. F. Long, Y. J. Mo, Y. M. Ma, Z. P. Mao, Andrzej Kupsc, B. Kopf, H. P. Cheng, X. L. Luo, J. F. Sun, C. Leng, H. H. Zhang, J. Fang, Tao Li, N. Yu. Muchnoi, Z. J. Sun, H. Loehner, X. S. Kang, Y. H. Zhang, J. J. Zhang, B. Y. Zhang, S. Q. Zhang, F. Y. Li, G. S. Varner, M. Destefanis, H. S. Chen, K. L. He, L. G. Xia, A. Amoroso, Alperen Yuncu, Jin Li, S. W. Han, S. Marcello, Y. Zeng, M. L. Chen, Zhe Sun, A. Dbeyssi, J. Chai, Ch. Rosner, C. Z. Yuan, S. L. Olsen, J. Z. Bai, A. A. Zafar, H. L. Dai, Jiaxi Liu, F. Bianchi, G. X. Sun, J. V. Bennett, Li Yan, Z. B. Li, G. F. Xu, Jimin Zhao, S. Jin, X. L. Gao, M. Kornicer, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, A. Julin, Z. Y. Wang, S. Qian, Q. An, Jialun Ping, A. Hafner, Q. Zhao, E. H. Thorndike, Y. Z. Sun, Z. Jiao, D. H. Zhang, J. Q. Zhang, I. R. Boyko, C. F. Redmer, X. P. Xu, X. B. Ji, M. Tiemens, Y. B. Zhao, K. Zhang, C. Dong, S. Sosio, W. Shan, P. Patteri, X. H. Liu, J. P. Dai, J. Dong, D. Y. Liu, Liqing Xu, X. Y. Shen, Y. Ding, S. Nisar, X. C. Chen, Joachim Pettersson, Y. N. Guo, C. J. Tang, Y. Hu, X. Y. Song, Y. P. Lu, B. J. Liu, L. D. Liu, S. Schumann, X. Y. Zhang, Gang Zhao, D. Xiao, W. Kühn, Z. Y. You, Z. A. Zhu, Jun-Yi Zhang, J. J. Xu, D. J. Ambrose, Q. Ouyang, S. S. Fang, J. S. Huang, D. W. Bennett, Zujian Wang, Y. B. Liu, C. X. Liu, Yao Wang, C. P. Shen, J. B. Liu, R. Farinelli, Y. J. Sun, E. Boger, H. L. Ma, D. M. Li, H. Muramatsu, M. Pelizaeus, T. Holtmann, H. R. Qi, K. H. Rashid, J. Y. Liu, Y. P. Guo, Q. Gao, Serkant Ali Cetin, Y. N. Gao, Y. Zhang, M. Albrecht, J. B. Jiao, Y. T. Liang, W. D. Li, S. J. Chen, K. J. Li, X. N. Ma, A. Zallo, B. Wang, M. Fritsch, M. Kavatsyuk, I. Tapan, L. H. Wu, O. Dorjkhaidav, M. Savrie, B. X. Zhang, Y. H. Yan, J. W. Zhao, Y. J. Xiao, X. Fang, F. Feldbauer, Z. A. Liu, Z. L. Huang, Feng Liu, Y. C. Zhu, Z. H. Wang, M. Ablikim, X. Y. Jiang, P. Musiol, Xiaocong Ai, C. Schnier, Y. Q. Wang, X. T. Huang, G. Rong, H. Xiao, T. Held, V. Prasad, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, X. R. Zhou, Cheng Li, X. K. Chu, M. H. Ye, L. Y. Dong, W. J. Zheng, Peilian Liu, I. B. Nikolaev, Lingxuan Zhang, J. H. Yin, M. Shao, Y. T. Gu, E. Fioravanti, Xichao Ruan, Yang Li, M. H. Gu, X. L. Kang, A. Sarantsev, D. H. Wei, J. S. Lange, Q. W. Zhao, H. Y. Sheng, C. X. Yu, B. Zheng, R. G. Ping, X. H. Mo, L. S. Wang, L. L. Wang, H. Cai, Manuel Lara, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, F. H. Liu, Nicolas Berger, J. W. Zhang, X. Q. Hao, Z. G. Wang, H. Y. Zhang, G. F. Chen, P. Larin, J. Y. Zhang, Y. K. Heng, J. M. Bian, S. J. Zhao, Y. X. Xia, Q. J. Xu, J. C. Chen, Xuanhong Lou, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, M. G. Zhao, R. P. Guo, and Z. Ning
Subjects: Physics, Combinatorics, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, 010306 general physics, 01 natural sciences
Abstract: We present the first study of the process $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\eta}{\ensuremath{\pi}}^{0}$ using $(223.7\ifmmode\pm\else\textpm\fi{}1.4)\ifmmode\times\else\texttimes\fi{}1{0}^{6}$ $J/\ensuremath{\psi}$ events accumulated with the BESIII detector at the BEPCII facility. The branching fraction for $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\eta}{\ensuremath{\pi}}^{0}$ is measured to be $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\eta}{\ensuremath{\pi}}^{0})=(2.14\ifmmode\pm\else\textpm\fi{}0.18(\text{stat})\ifmmode\pm\else\textpm\fi{}0.25(\text{syst}))\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}5}$. With a Bayesian approach, the upper limits of the branching fractions $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}{a}_{0}(980),{a}_{0}(980)\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{0})$ and $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}{a}_{2}(1320),{a}_{2}(1320)\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{0})$ are determined to be $2.5\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}6}$ and $6.6\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}6}$ at the 95% confidence level, respectively. All of these measurements are given for the first time.
Published: 2016

12. Performance of a gas radiator ring imaging Cherenkov detector using multi-anode photomultiplier tubes

Author: R. Nandakumar, N. Menaa, H. Muramatsu, K. Zhang, C. Boulahouache, K. Randrianarivony, S. Blusk, R. Sia, J. Butt, Marina Artuso, R. Mountain, O. Dorjkhaidav, Tomasz Skwarnicki, Jing Wang, and Sheldon Stone
Subjects: Physics, Nuclear and High Energy Physics, Photomultiplier, Physics::Instrumentation and Detectors, Cherenkov detector, business.industry, BTeV experiment, Charged particle, Ring-imaging Cherenkov detector, Anode, law.invention, Optics, law, Radiator (engine cooling), High Energy Physics::Experiment, business, Instrumentation, Cherenkov radiation
Abstract: We report on tests of a novel ring imaging Cherenkov (RICH) detection system consisting of a 3-m-long gaseous C 4 F 8 O radiator, a focusing mirror, and a photon detector array based on Hamamatsu multi-anode photomultiplier tubes. This system was developed to identify charged particles in the momentum range from 3 to 70 GeV/c for the BTeV experiment.
Published: 2006

13. Publisher’s Note: Observation of a narrow resonance of mass2.46 GeV/c2decaying toDs+π0and confirmation of theDsJ(2317)state [Phys. Rev. D68, 032002 (2003)]

Author: J. B. Thayer, L. Hsu, L. Breva-Newell, T. O. Meyer, Mats A Selen, A. J. Sadoff, S. B. Athar, N. Lowrey, D. Cinabro, B. Gittelman, J. C. Williams, Thomas Ferguson, T. K. Pedlar, D. L. Hartill, Ian Shipsey, D. Z. Besson, J. E. Duboscq, K. W. Edwards, V. Potlia, F. Liu, C. Boulahouache, Ron Poling, K. K. Gan, T. Skwarnicki, James Mueller, D. G. Cassel, E. A. Eckhart, S. McGee, B. K. Heltsley, R. Nandakumar, C. S. Park, A. M. Smith, C. Plager, H. Stoeck, J. G. Thayer, M. R. Shepherd, S. P. Pappas, W. Park, B. I. Eisenstein, C. Gwon, E. H. Thorndike, C. Sedlack, J. Pivarski, Horst Severini, J. Urheim, R. A. Briere, V. Pavlunin, D. Urner, E. I. Shibata, R. Ehrlich, T. Wilksen, J. C. Wang, Kamal K. Seth, Shuwang Li, A. H. Mahmood, G. Bonvicini, J. P. Alexander, J. R. Patterson, D. Riley, R. Mountain, Hans J. Vogel, P. Skubic, M. E. Watkins, E. von Toerne, A. Bornheim, H. Mahlke-Krüger, K. M. Ecklund, A. J.R. Weinstein, P. Zweber, T. E. Coan, K. E. Arms, G. S. Huang, M. Dubrovin, John Yelton, Z. Metreveli, S. Nam, R. S. Galik, Y. S. Gao, J. J. Thaler, Veronique Boisvert, S. J. Richichi, S. B. Anderson, Ryszard Stroynowski, D. L. Kreinick, Marina Artuso, I. Danko, B. Sanghi, Yuichi Kubota, Andreas Warburton, Karl Berkelman, H. Muramatsu, V. Savinov, L. Gibbons, Sheldon Stone, H. Schwarthoff, Paul Avery, V. V. Frolov, Amiran Tomaradze, C. J. Stepaniak, G. Tatishvili, Werner Sun, O. Dorjkhaidav, Daniel P Cronin-Hennessy, N. E. Adam, S. Blusk, A. Magerkurth, George D Gollin, E. Dambasuren, June Hyuk Lee, D. H. Miller, S. A. Dytman, S. E. Csorna, G. P. Chen, C. D. Jones, J. W. Hinson, S. W. Gray, Elliot Lipeles, J. Kandaswamy, M. Weinberger, D. Peterson, D. T. Gong, N. B. Mistry, I. Karliner, and A. Shapiro
Subjects: Gravitation, Physics, Nuclear and High Energy Physics, Particle decay, Classical mechanics, Quantum mechanics, State (functional analysis), Resonance (particle physics), Cosmology
Published: 2007

14. Publisher’s Note: Search fore+e−→Λb0Λb0near threshold [Phys. Rev. D71, 012004 (2005)]

Author: Jing Wang, D. Riley, B. W. Lang, D. H. Miller, Radia Redjimi, R. Nandakumar, M. Dubrovin, G. S. Adams, J. J. Thaler, Ryszard Stroynowski, H. Schwarthoff, N. Lowrey, Yuichi Kubota, P. U. E. Onyisi, O. Dorjkhaidav, T. O. Meyer, S. E. Csorna, T. K. Pedlar, D. Cronin-Hennessy, D. Cinabro, Z. Li, B. Gittelman, B. Sanghi, S. A. Dytman, I. Danko, V. E. Kuznetsov, J. P. Cummings, L. Hsu, L. Breva-Newell, Marina Artuso, Sean A Dobbs, D. Z. Besson, V. Potlia, N. E. Adam, A. W. Scott, D. M. Asner, Rishi Patel, K. Zhang, E. H. Thorndike, J. B. Thayer, K. K. Seth, C. Sedlack, L. K. Gibbons, D. Hertz, I. Karliner, J. E. Duboscq, K. W. Edwards, G. Bonvicini, R. Mountain, J. P. Alexander, W. Park, Paul Avery, G. Tatishvili, S. Stone, Werner Sun, F. Liu, D. Y.J. Kim, S. W. Gray, M. Cravey, A. H. Mahmood, Mats A Selen, D. G. Cassel, A. J. Sadoff, G. P. Chen, C. Cawlfield, R. S. Galik, S. Blusk, K. E. Arms, G. S. Huang, I. P. J. Shipsey, R. Poling, C. D. Jones, Juliet Ritchie Patterson, H. Stoeck, V. Crede, J. E. Ramirez, S. P. Pappas, B. I. Eisenstein, J. Pivarski, J. C. Williams, Thomas Ferguson, John Yelton, W. Love, M. Chasse, T. Wilksen, D. L. Hartill, S. Mehrabyan, James E Wiss, N. Menaa, Amiran Tomaradze, T. E. Coan, S. Stroiney, Jonathan L. Rosner, K. M. Ecklund, J. Kandaswamy, M. Weinberger, J. A. Ernst, C. J. Stepaniak, D. Peterson, D. L. Kreinick, D. T. Gong, C. S. Park, Richard Gray, V. Savinov, L. Fields, K. Y. Gao, Li Jingyuan, Jamila Bashir Butt, B. K. Heltsley, R. Ehrlich, M. E. Watkins, A. Bornheim, G. D. Gollin, J. G. Thayer, H. Mahlke-Krüger, Z. Metreveli, Y. S. Gao, James Mueller, K. K. Gan, T. Skwarnicki, V. Pavlunin, D. Urner, E. I. Shibata, J. Napolitano, P. Rubin, R. Sia, Alan D. Lopez, P. Zweber, Hans J. Vogel, Horst Severini, R. A. Briere, Shuwang Li, A. J.R. Weinstein, P. Naik, C. Boulahouache, A. M. Smith, H. Mendez, S. B. Athar, Karl Berkelman, H. Muramatsu, Anders Ryd, M. R. Shepherd, and E. Dambasuren
Subjects: Physics, Nuclear and High Energy Physics, Mathematical physics
Published: 2007

15. Publisher’s Note: Searches forCPviolation andππSwave in the Dalitz-plot analysis ofD0→π+π−π0[Phys. Rev. D72, 031102 (2005)]

Author: K. K. Gan, T. Skwarnicki, D. Riley, W. Love, V. E. Kuznetsov, Ian Shipsey, T. O. Meyer, E. H. Thorndike, H. Mendez, G. Bonvicini, J. P. Alexander, R. S. Galik, T. K. Pedlar, M. Dubrovin, P. Naik, T. E. Coan, Rishi Patel, Melissa Beth Anderson, T. Klein, K. K. Seth, J. P. Cummings, C. Plager, C. Sedlack, N. Lowrey, D. Cinabro, C. Boulahouache, Yuichi Kubota, D. Z. Besson, S. Stroiney, Jonathan L. Rosner, G. P. Chen, A. W. Scott, P. Rubin, S. B. Athar, A. H. Mahmood, Ryszard Stroynowski, B. Gittelman, S. Blusk, R. Sia, Sheldon Stone, G. Tatishvili, Werner Sun, G. S. Adams, R. A. Briere, R. Mountain, Karl Berkelman, H. Muramatsu, Paul Avery, K. E. Arms, Radia Redjimi, Z. Li, R. Gray, D. M. Asner, Xin Shi, Amiran Tomaradze, D. G. Cassel, Anders Ryd, D. Cronin-Hennessy, L. Hsu, M. R. Shepherd, D. L. Hartill, V. Potlia, C. D. Jones, S. E. Csorna, David Miller, L. Breva-Newell, I. Danko, B. Sanghi, L. K. Gibbons, C. S. Park, K. Randrianarivony, M. E. Watkins, J. Pivarski, R. Poling, J. Napolitano, Peter K. Zweber, D. Hertz, J. Kandaswamy, M. Weinberger, J. E. Duboscq, K. W. Edwards, A. Bornheim, V. Pavlunin, R. Nandakumar, D. Urner, J.Ritchie Patterson, F. Liu, M. Chasse, N. Menaa, L. Fields, J. A. Ernst, A. M. Smith, D. Y.J. Kim, James E Wiss, O. Dorjkhaidav, E. Dambasuren, D. Peterson, B. I. Eisenstein, Jing Wang, H. Schwarthoff, S. W. Gray, D. T. Gong, Sean A Dobbs, G. S. Huang, N. E. Adam, H. Stoeck, V. Crede, S. P. Pappas, J. E. Ramirez, S. Mehrabyan, B. W. Lang, J. C. Williams, Thomas Ferguson, Alan D. Lopez, S. A. Dytman, Hans J. Vogel, Junjie Chen, John Yelton, A. J.R. Weinstein, J. Hietala, Marina Artuso, C. Cawlfield, K. Y. Gao, Mats A Selen, Jamila Bashir Butt, A. J. Sadoff, K. Zhang, Z. Metreveli, Y. S. Gao, James Mueller, W. Park, R. Ehrlich, H. Mahlke-Krüger, T. Wilksen, Horst Severini, Shuwang Li, K. M. Ecklund, Peter Onyisi, B. K. Heltsley, Q. He, I. Karliner, G. D. Gollin, D. L. Kreinick, V. Savinov, and Li Jingyuan
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, S-wave, Pi, Dalitz plot, CP violation
Published: 2007

16. Measurement of the direct photon momentum spectrum inΥ(1S),Υ(2S), andΥ(3S)decays

Author: S. Blusk, S. B. Athar, Dong-Hyun Kim, K. M. Weaver, K. Y. Gao, L. Breva-Newell, Hans J. Vogel, Junjie Chen, J. E. Duboscq, K. W. Edwards, John Yelton, T. K. Pedlar, J. Hietala, J. Pivarski, E. A. Phillips, James E Wiss, J. Kandaswamy, V. Crede, R. Gray, G. Tatishvili, James Mueller, P. Rubin, D. Peterson, J. Williams, G. C. Moneti, B. Sanghi, M. Cravey, Amiran Tomaradze, T. O. Meyer, R. Sia, Werner Sun, D. T. Gong, K. E. Arms, H. Schwarthoff, E. H. Thorndike, T. E. Coan, G. P. Chen, Anders Ryd, Mats A Selen, K. M. Ecklund, K. Zhang, J. A. Ernst, A. J. Weinstein, J. Butt, J. P. Cummings, S. Stroiney, Jonathan L. Rosner, Tomasz Skwarnicki, D. Urner, S. P. Pappas, Kamal K. Seth, G. Bonvicini, J. P. Alexander, M. E. Watkins, D. L. Kreinick, H. Stoeck, D. L. Hartill, D. Cronin-Hennessy, M. Weinberger, Ryszard Stroynowski, I. P.J. Shipsey, A. J. Sadoff, Z. Metreveli, D. Z. Besson, Marina Artuso, R. A. Briere, I. Danko, Peter K. Zweber, Sheldon Stone, A. W. Scott, T. Wilksen, S. Henderson, M. R. Shepherd, Paul Avery, N. Menaa, X. Shi, C. S. Park, R. S. Galik, C. Cawlfield, Z. Li, O. Dorjkhaidav, V. Savinov, H. Mendez, Adolf Bornheim, S. Mehrabyan, G. S. Huang, C. Sedlack, Li Jingyuan, Sean A Dobbs, F. Liu, L. Fields, V. Potlia, R. Redjimi, D. Riley, D. G. Cassel, R. Ehrlich, D. M. Asner, L. K. Gibbons, R. Patel, D. Hertz, J. Napolitano, V. E. Kuznetsov, B. K. Heltsley, R. Nandakumar, A. Lopez, M. Dubrovin, G. D. Gollin, H. Mahlke-Krüger, C. Boulahouache, Yuichi Kubota, B. W. Lang, D. H. Miller, T. Klein, A. Smith, I. Karliner, P. Naik, G. S. Adams, Karl Berkelman, B. I. Eisenstein, H. Muramatsu, S. E. Csorna, W. Love, J. E. Ramirez, Thomas Ferguson, N. Lowrey, D. Cinabro, B. Gittelman, K. Randrianarivony, R. Mountain, E. J. White, S. A. Dytman, Juliet Ritchie Patterson, N. E. Adam, S. W. Gray, Horst Severini, Shuwang Li, Peter Onyisi, R. Poling, Q. He, V. Pavlunin, Y. S. Gao, C. D. Jones, and J. C. Wang
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, Electron–positron annihilation, Perturbative QCD, Photon spectra, 01 natural sciences, Isospin, 0103 physical sciences, Strong coupling, Cornell Electron Storage Ring, 010306 general physics
Abstract: Using data taken with the CLEO III detector at the Cornell Electron Storage Ring, we have investigated the direct photon spectrum in the decays $\ensuremath{\Upsilon}(1\mathrm{S})\ensuremath{\rightarrow}\ensuremath{\gamma}gg$, $\ensuremath{\Upsilon}(2\mathrm{S})\ensuremath{\rightarrow}\ensuremath{\gamma}gg$, $\ensuremath{\Upsilon}(3\mathrm{S})\ensuremath{\rightarrow}\ensuremath{\gamma}gg$. The latter two of these are first measurements. Our analysis procedures differ from previous ones in the following ways: (a) background estimates (primarily from ${\ensuremath{\pi}}^{0}$ decays) are based on isospin symmetry rather than a determination of the ${\ensuremath{\pi}}^{0}$ spectrum, which permits measurement of the $\ensuremath{\Upsilon}(2\mathrm{S})$ and $\ensuremath{\Upsilon}(3\mathrm{S})$ direct photon spectra without explicit corrections for ${\ensuremath{\pi}}^{0}$ backgrounds from, e.g., ${\ensuremath{\chi}}_{bJ}$ states, (b) we estimate the branching fractions with a parametrized functional form (exponential) used for the background, and c) we use the high-statistics sample of $\ensuremath{\Upsilon}(2\mathrm{S})\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\pi}\ensuremath{\Upsilon}(1\mathrm{S})$ to obtain a tagged sample of $\ensuremath{\Upsilon}(1\mathrm{S})\ensuremath{\rightarrow}\ensuremath{\gamma}+X$ events, for which there are no QED backgrounds. We determine values for the ratio of the inclusive direct photon decay rate to that of the dominant three-gluon decay $\ensuremath{\Upsilon}\ensuremath{\rightarrow}ggg\text{ }\text{ }({R}_{\ensuremath{\gamma}}=B(gg\ensuremath{\gamma})/B(ggg))$ to be ${R}_{\ensuremath{\gamma}}(1\mathrm{S})=(2.70\ifmmode\pm\else\textpm\fi{}0.01\ifmmode\pm\else\textpm\fi{}0.13\ifmmode\pm\else\textpm\fi{}0.24)%$, ${R}_{\ensuremath{\gamma}}(2\mathrm{S})=(3.18\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.22\ifmmode\pm\else\textpm\fi{}0.41)%$, and ${R}_{\ensuremath{\gamma}}(3\mathrm{S})=(2.72\ifmmode\pm\else\textpm\fi{}0.06\ifmmode\pm\else\textpm\fi{}0.32\ifmmode\pm\else\textpm\fi{}0.37)%$, where the errors shown are statistical, systematic, and theoretical model dependent, respectively. Given a value of ${Q}^{2}$, one can estimate a value for the strong coupling constant ${\ensuremath{\alpha}}_{s}({Q}^{2})$ from ${R}_{\ensuremath{\gamma}}$.
Published: 2006

17. Erratum: Measurement of Absolute Hadronic Branching Fractions ofDMesons ande+e−→DD¯Cross Sections atEc.m.=3773 MeV[Phys. Rev. Lett.95, 121801 (2005)]

Author: Hans J. Vogel, T. O. Meyer, N. Lowrey, D. Cinabro, J. Kandaswamy, M. Weinberger, Z. Li, J. P. Cummings, M. E. Watkins, Junjie Chen, G. Tatishvili, Werner Sun, D. Z. Besson, K. Y. Gao, B. Gittelman, Horst Severini, R. A. Briere, Z. Metreveli, V. Potlia, Mats A Selen, T. K. Pedlar, Jamila Bashir Butt, Shuwang Li, D. Peterson, Dong Hee Kim, Rishi Patel, A. J. Sadoff, R. Mountain, D. Hertz, Karl Berkelman, K. M. Weaver, H. Muramatsu, L. Hsu, T. Wilksen, D. T. Gong, T. Skwarnicki, Y. S. Gao, D. Riley, L. Breva-Newell, S. W. Gray, D. G. Cassel, D. L. Hartill, C. Sedlack, B. Sanghi, L. Gibbons, E. H. Thorndike, M. Dubrovin, C. S. Park, Richard Gray, Q. He, R. Poling, I. Karliner, K. Zhang, S. Mehrabyan, N. Menaa, S. B. Athar, J. E. Duboscq, K. W. Edwards, Anders Ryd, G. Bonvicini, M. R. Shepherd, H. Mendez, Yuichi Kubota, B. I. Eisenstein, J. P. Alexander, K. M. Ecklund, Marina Artuso, Amiran Tomaradze, W. Love, M. Chasse, V. E. Kuznetsov, L. Fields, O. Dorjkhaidav, D. M. Asner, K. Randrianarivony, S. A. Dytman, James E Wiss, G. P. Chen, J. Pivarski, T. Klein, E. A. Phillips, D. L. Kreinick, P. Rubin, J. E. Ramirez, C. Cawlfield, James Mueller, George D Gollin, V. Pavlunin, John Yelton, P. U. E. Onyisi, R. Sia, J. R. Patterson, F. Liu, A. M. Smith, I. P. J. Shipsey, D. Urner, J. Hietala, J. A. Ernst, G. S. Huang, C. D. Jones, J. C. Williams, Thomas Ferguson, G. S. Adams, X. Shi, P. Naik, Sean A Dobbs, W. Park, P. Zweber, N. E. Adam, C. Boulahouache, S. Blusk, Radia Redjimi, S. E. Csorna, H. Stoeck, V. Crede, R. Ehrlich, J. Napolitano, V. Savinov, E. Dambasuren, B. W. Lang, D. H. Miller, Li Jingyuan, Kamal K. Seth, A. Lopez, H. Mahlke-Krüger, B. K. Heltsley, Sheldon Stone, Paul Avery, D. Cronin-Hennessy, I. Danko, A. H. Mahmood, T. E. Coan, S. Stroiney, Jonathan L. Rosner, M. Cravey, R. Nandakumar, J. C. Wang, A. W. Scott, and H. Schwarthoff
Subjects: Physics, Nuclear physics, Annihilation, Meson, Branching fraction, Hadron, General Physics and Astronomy, Elementary particle, Boson, Lepton, Dimensionless quantity
Published: 2006

18. Observation ofψ(3770)→γχc1→γγJ/ψ

Author: N. Lowrey, D. L. Kreinick, Rishi Patel, D. Cinabro, B. Gittelman, D. M. Asner, Patterson, C. Sedlack, Li Jingyuan, H. Stoeck, K. Y. Gao, D. Urner, R. Nandakumar, E. H. Thorndike, Jamila Bashir Butt, T. O. Meyer, E. A. Phillips, P. Rubin, R. Sia, G. P. Chen, M. E. Watkins, Alan D. Lopez, Hans J. Vogel, P. U. E. Onyisi, G. Bonvicini, J. P. Alexander, Radia Redjimi, James Mueller, P. Naik, T. Wilksen, A. Lincoln, P. Zweber, Xin Shi, Junjie Chen, J. P. Cummings, L. K. Gibbons, J. Pivarski, J. E. Ramirez, Amiran Tomaradze, K. M. Ecklund, Horst Severini, R. A. Briere, T. Skwarnicki, R. S. Galik, C. Boulahouache, D. Hertz, J. C. Williams, D. Z. Besson, Thomas Ferguson, B. Sanghi, R. Mountain, Anders Ryd, D. Riley, Shuwang Li, Crede, Michael T. Anderson, James E Wiss, I. P. J. Shipsey, M. R. Shepherd, D. Cronin-Hennessy, I. Danko, M. Dubrovin, R. Ehrlich, Z. Li, F. Liu, C. D. Jones, A. W. Scott, H. Mendez, D. Y.J. Kim, T. K. Pedlar, J. Napolitano, Marina Artuso, D. G. Cassel, B. K. Heltsley, K. M. Weaver, Yuichi Kubota, L. Breva-Newell, S. B. Athar, H. Mahlke-Krüger, C. S. Park, Richard Gray, G. D. Gollin, J. E. Duboscq, K. W. Edwards, K. Randrianarivony, L. Fields, A. M. Smith, Z. Metreveli, G. S. Huang, T. E. Coan, S. Stroiney, Jonathan L. Rosner, R. Poling, Y. S. Gao, E. J. White, S. A. Dytman, B. I. Eisenstein, W. Love, G. Tatishvili, Werner Sun, S. W. Gray, V. E. Kuznetsov, T. Klein, Karl Berkelman, H. Muramatsu, O. Dorjkhaidav, Sean A Dobbs, Savinov, N. E. Adam, S. Blusk, Jing Wang, B. W. Lang, D. H. Miller, G. S. Adams, S. E. Csorna, S. Mehrabyan, K. Zhang, Potlia, K. K. Seth, Sheldon Stone, Paul Avery, C. Cawlfield, J. Kandaswamy, M. Weinberger, Pavlunin, H. Schwarthoff, J. A. Ernst, D. Peterson, D. T. Gong, Mats A Selen, A. J. Sadoff, John Yelton, J. Hietala, D. L. Hartill, N. Menaa, Q. He, and I. Karliner
Subjects: Physics, Branching fraction, Analytical chemistry, General Physics and Astronomy, Cornell Electron Storage Ring
Abstract: From e(+)e(-) collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-DD(_) decay Psi(3770))-->gammachi(c1) with a statistical significance of 6.6 standard deviations, using the two-photon cascades to J/Psi and J/Psi-->l(+)l(-). We determine sigma(e(=)e(-)-->Psi(3770))xBeta(Psi(3770)-->gammachi(c1))=(18.0 +/- 3.3 +/- 2.5) pb and branching fraction Beta(Psi(3770)-->gammachi(c1)=(2.8 +/- 0.5+/-0.4) x 10(-3). We set 90% C.L. upper limits for the transition to chi(c2) (chi(c0)): sigma x Beta pi(+)pi(-)J/Psi)=1.5 +/- 0.3 +/- 0.3 (>1.0 at 90% C.L.), which bears upon the interpretation of X(3872).
Published: 2006

19. Two-photon width of the charmonium state X_(c2)

Author: C. S. Park, L. Fields, M. R. Shepherd, Jing Wang, T. E. Coan, A. J. Weinstein, S. Stroiney, I. P.J. Shipsey, G. Tatishvili, Jonathan L. Rosner, Tomasz Skwarnicki, B. W. Lang, T. O. Meyer, D. H. Miller, G. S. Huang, R. Gray, V. Potlia, S. W. Gray, F. Liu, R. Redjimi, S. P. Pappas, Amiran Tomaradze, J. P. Cummings, C. Boulahouache, L. K. Gibbons, J. Napolitano, T. K. Pedlar, D. Z. Besson, R. Patel, D. Hertz, Juliet Ritchie Patterson, N. E. Adam, A. W. Scott, Anders Ryd, K. M. Ecklund, E. A. Phillips, P. Rubin, E. J. White, D. Riley, O. Dorjkhaidav, Kamal K. Seth, J. Kandaswamy, S. Mehrabyan, G. S. Adams, Xin Shi, R. Sia, S. E. Csorna, E. H. Thorndike, Horst Severini, Sean A Dobbs, J. Butt, S. A. Dytman, M. E. Watkins, K. W. Edwards, Marina Artuso, Adolf Bornheim, J. A. Ernst, Mats A Selen, C. Sedlack, G. P. Chen, S. Blusk, G. Bonvicini, J. P. Alexander, H. Stoeck, B. K. Heltsley, V. E. Kuznetsov, R. A. Briere, M. Dubrovin, J. E. Duboscq, Shuwang Li, K. E. Arms, K. Zhang, D. Peterson, Peter Onyisi, J. E. Ramirez, D. L. Kreinick, L. Breva-Newell, A. J. Sadoff, Y. S. Gao, Sheldon Stone, T. Wilksen, Z. Li, T. Klein, Z. Metreveli, Paul Avery, R. S. Galik, P. Naik, R. Mountain, B. Sanghi, D. T. Gong, D. Cronin-Hennessy, V. Savinov, R. Poling, Karl Berkelman, Q. He, I. Danko, V. Pavlunin, D. M. Asner, Li Jingyuan, C. Cawlfield, H. Muramatsu, John Yelton, J. Hietala, J. Pivarski, Werner Sun, A. Smith, H. Schwarthoff, D. G. Cassel, K. Y. Gao, D. L. Hartill, Yuichi Kubota, C. D. Jones, Peter K. Zweber, James E Wiss, A. Lincoln, N. Menaa, Thomas Ferguson, I. Karliner, Alan D. Lopez, Hans J. Vogel, B. I. Eisenstein, W. Love, M. Weinberger, Junjie Chen, N. Lowrey, D. Cinabro, James Mueller, J. Williams, H. Mendez, S. B. Athar, Dong-Hyun Kim, K. Randrianarivony, M. Anderson, R. Ehrlich, and H. Mahlke-Krüger
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Positron, Radiative decay, Resonance, State (functional analysis), Particle identification
Abstract: The two-photon width of X_(c2)^3P_2 state of charmonium has been measured using 14.4 fb^(-1) of e^+e^-data taken at √s =9.46–11.30 GeV with the CLEO III detector. The yy-fusion reaction studied is e^+e^- → e^+e^-yy, → yy X_(c2) → yJ/Ψ → ye^+e^-(µ^+µ^-). We measure Г_(yy) (X_(c2))B(X_(c2)) → y J/Ψ)B(J/Ψ → e^+e^- + µ^+µ^-)= 13.2 ± 1.4(stat)± 1.1(syst) eV, and obtain Г yy(Xc2)= 559 ± 57(stat) ± 48(syst) ± 36(br) eV. This result is in excellent agreement with the result of -fusion measurement by Belle and is consistent with that of the pp → X_(c2) → yy measurement, when they are both reevaluated using the recent CLEO result for the radiative decay X_(c2) → J/Ψ .
Published: 2006

20. Observation ofψ(3770)→ππJ/ψand Measurement ofΓee[ψ(2S)]

Author: E. H. Thorndike, G. Tatishvili, T. O. Meyer, John Yelton, J. Hietala, G. Bonvicini, J. P. Alexander, V. Crede, R. S. Galik, D. Cronin-Hennessy, Anders Ryd, T. K. Pedlar, J. Pivarski, J. P. Cummings, E. A. Phillips, P. Rubin, V. Potlia, D. Urner, I. Danko, R. Redjimi, C. S. Park, H. Mendez, R. Sia, L. K. Gibbons, D. Z. Besson, L. Fields, N. Lowrey, D. L. Hartill, Peter K. Zweber, Kamal K. Seth, R. Patel, D. Cinabro, D. Hertz, K. Y. Gao, J. Butt, Y. S. Gao, S. B. Athar, N. Menaa, S. Mehrabyan, T. E. Coan, S. Stroiney, I. P.J. Shipsey, B. Gittelman, P. Naik, James Mueller, V. E. Kuznetsov, Dong-Hyun Kim, Jonathan L. Rosner, Tomasz Skwarnicki, K. M. Ecklund, Marina Artuso, R. Mountain, J. Williams, Karl Berkelman, H. Muramatsu, K. W. Edwards, M. E. Watkins, Sheldon Stone, Paul Avery, W. Love, K. M. Weaver, Hans J. Vogel, L. Breva-Newell, Junjie Chen, F. Liu, B. Sanghi, J. A. Ernst, D. L. Kreinick, T. Klein, Z. Li, R. Ehrlich, A. J. Sadoff, Mats A Selen, C. Boulahouache, D. G. Cassel, T. Wilksen, Juliet Ritchie Patterson, M. R. Shepherd, A. Lopez, X. Shi, Werner Sun, N. E. Adam, A. W. Scott, I. Karliner, H. Mahlke-Krüger, C. D. Jones, R. Nandakumar, J. E. Ramirez, G. S. Huang, R. Gray, J. Napolitano, B. I. Eisenstein, Amiran Tomaradze, H. Schwarthoff, J. C. Wang, Z. Metreveli, Horst Severini, V. Savinov, Thomas Ferguson, A. Smith, Shuwang Li, Li Jingyuan, Peter Onyisi, K. Randrianarivony, R. Poling, Q. He, M. Anderson, V. Pavlunin, B. K. Heltsley, G. D. Gollin, B. W. Lang, D. H. Miller, K. Zhang, G. S. Adams, S. E. Csorna, J. Kandaswamy, O. Dorjkhaidav, S. W. Gray, D. Peterson, James E Wiss, D. T. Gong, C. Cawlfield, Sean A Dobbs, S. Blusk, J. E. Duboscq, E. J. White, S. A. Dytman, G. P. Chen, H. Stoeck, R. A. Briere, D. M. Asner, C. Sedlack, M. Weinberger, D. Riley, M. Dubrovin, and Yuichi Kubota
Subjects: Physics, Crystallography, Particle physics, Particle decay, Antiparticle, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, High Energy Physics::Experiment, Quarkonium, Dimensionless quantity
Abstract: We observe signals for the decays {psi}(3770){yields}XJ/{psi} from data acquired with the CLEO detector operating at the CESR e{sup +}e{sup -} collider with {radical}(s)=3773 MeV. We measure the following branching fractions B({psi}(3770){yields}XJ/{psi}) and significances: (189{+-}20{+-}20)x10{sup -5} (11.6{sigma}) for X={pi}{sup +}{pi}{sup -} (80{+-}25{+-}16)x10{sup -5} (3.4{sigma}) for X={pi}{sup 0}{pi}{sup 0}, and (87{+-}33{+-}22)x10{sup -5} (3.5{sigma}) for X={eta}, where the errors are statistical and systematic, respectively. The radiative return process e{sup +}e{sup -}{yields}{gamma}{psi}(2S) populates the same event sample and is used to measure {gamma}{sub ee}[{psi}(2S)]=(2.54{+-}0.03{+-}0.11) keV.
Published: 2006

21. Radiative decays of theΥ(1S)to a pair of charged hadrons

Author: D. L. Kreinick, G. Tatishvili, T. O. Meyer, Y. S. Gao, Anders Ryd, A. J. Sadoff, D. Riley, T. Wilksen, I. P.J. Shipsey, X. Shi, A. Smith, J. Napolitano, James E Wiss, J. P. Cummings, O. Dorjkhaidav, Mats A Selen, M. Dubrovin, E. A. Phillips, P. Rubin, C. S. Park, V. Savinov, D. Z. Besson, Sean A Dobbs, E. H. Thorndike, R. Sia, J. Butt, G. S. Adams, H. Mendez, C. Boulahouache, E. J. White, Li Jingyuan, D. L. Hartill, G. Bonvicini, M. R. Shepherd, C. D. Jones, S. E. Csorna, S. A. Dytman, K. Y. Gao, Ryszard Stroynowski, J. P. Alexander, S. P. Pappas, Peter K. Zweber, N. Menaa, James Mueller, J. Williams, Yuichi Kubota, L. Fields, P. Naik, F. Liu, Karl Berkelman, J. C. Wang, H. Muramatsu, B. Sanghi, Z. Li, Werner Sun, K. M. Ecklund, Marina Artuso, V. Crede, D. Urner, K. Zhang, J. E. Ramirez, R. S. Galik, S. Blusk, T. E. Coan, H. Schwarthoff, D. Cronin-Hennessy, S. B. Athar, G. S. Huang, V. Potlia, A. J. Weinstein, S. Stroiney, J. E. Duboscq, Jonathan L. Rosner, Tomasz Skwarnicki, I. Danko, R. Redjimi, M. E. Watkins, Adolf Bornheim, C. Sedlack, A. W. Scott, L. K. Gibbons, Kamal K. Seth, S. W. Gray, Thomas Ferguson, Dong-Hyun Kim, R. Mountain, S. Mehrabyan, R. Patel, D. Hertz, B. K. Heltsley, G. P. Chen, H. Stoeck, R. A. Briere, T. K. Pedlar, R. Ehrlich, G. D. Gollin, N. Lowrey, K. M. Weaver, M. Cravey, B. W. Lang, D. Cinabro, D. H. Miller, John Yelton, J. Hietala, L. Breva-Newell, A. Lopez, B. Gittelman, W. Love, H. Mahlke-Krüger, J. Pivarski, Juliet Ritchie Patterson, N. E. Adam, Z. Metreveli, K. W. Edwards, K. E. Arms, J. A. Ernst, Horst Severini, V. E. Kuznetsov, K. Randrianarivony, Shuwang Li, Peter Onyisi, D. M. Asner, R. Poling, Q. He, D. G. Cassel, V. Pavlunin, T. Klein, I. Karliner, B. I. Eisenstein, Hans J. Vogel, Junjie Chen, R. Gray, Amiran Tomaradze, J. Kandaswamy, D. Peterson, D. T. Gong, C. Cawlfield, R. Nandakumar, Sheldon Stone, Paul Avery, and M. Weinberger
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, Radiative transfer, Cornell Electron Storage Ring, Helicity, Particle identification
Abstract: Using data obtained with the CLEO III detector, running at the Cornell Electron Storage Ring (CESR), we report on a new study of exclusive radiative Υ(1S) decays into the final states γπ^+π^-, γK^+K^-, and γpp . We present branching ratio measurements for the decay modes Υ(1S)→γf_2(1270), Υ(1S)→γf′_2(1525), and Υ(1S)→γK^+K^-; helicity production ratios for f_2(1270) and f′_2(1525); upper limits for the decay Υ(1S)→γf_J(2200), with f_J(2220)→π^+π^-, K^+K^-, pp ; and an upper limit for the decay Υ(1S)→γX(1860), with X(1860)→γpp .
Published: 2006

22. Search for Exclusive Multibody Non-DD¯Decays at theψ(3770)Resonance

Author: R. Nandakumar, T. K. Pedlar, W. Love, I. P.J. Shipsey, Peter Onyisi, Z. Metreveli, D. G. Cassel, Z. Li, R. Mountain, V. E. Kuznetsov, R. Poling, I. Karliner, B. I. Eisenstein, G. Tatishvili, T. O. Meyer, Q. He, V. Pavlunin, E. H. Thorndike, M. R. Shepherd, J. P. Cummings, V. Potlia, T. Klein, R. Redjimi, L. K. Gibbons, John Yelton, J. Hietala, D. Z. Besson, G. Bonvicini, Juliet Ritchie Patterson, N. E. Adam, J. P. Alexander, R. Patel, D. Hertz, K. M. Ecklund, J. Pivarski, R. Gray, Werner Sun, S. Blusk, G. S. Huang, H. Schwarthoff, Horst Severini, A. Smith, D. L. Kreinick, Marina Artuso, A. J. Sadoff, James Mueller, T. Wilksen, Amiran Tomaradze, R. S. Galik, D. Urner, J. E. Ramirez, J. E. Duboscq, J. Williams, F. Liu, D. Cronin-Hennessy, Shuwang Li, A. W. Scott, I. Danko, K. Y. Gao, V. Savinov, K. M. Weaver, D. M. Asner, Sheldon Stone, Xin Shi, Paul Avery, Li Jingyuan, L. Breva-Newell, Mats A Selen, S. Mehrabyan, K. W. Edwards, J. Napolitano, Thomas Ferguson, B. K. Heltsley, R. Ehrlich, C. Sedlack, O. Dorjkhaidav, E. A. Phillips, B. Sanghi, P. Rubin, G. D. Gollin, R. Sia, Sean A Dobbs, D. L. Hartill, Alan D. Lopez, Peter K. Zweber, J. Butt, V. Crede, C. Boulahouache, Hans J. Vogel, H. Mahlke-Krüger, N. Menaa, Kamal K. Seth, Junjie Chen, K. Randrianarivony, H. Mendez, S. B. Athar, N. Lowrey, D. Cinabro, M. Weinberger, B. Gittelman, M. E. Watkins, Dong-Hyun Kim, D. Riley, M. Dubrovin, G. S. Adams, S. E. Csorna, Yuichi Kubota, J. Kandaswamy, J. A. Ernst, D. Peterson, D. T. Gong, C. Cawlfield, B. W. Lang, D. H. Miller, James E Wiss, K. Zhang, Anders Ryd, T. E. Coan, S. Stroiney, Jonathan L. Rosner, Tomasz Skwarnicki, E. J. White, P. Naik, Karl Berkelman, H. Muramatsu, S. A. Dytman, C. S. Park, G. P. Chen, H. Stoeck, R. A. Briere, L. Fields, S. W. Gray, M. Cravey, C. D. Jones, J. C. Wang, and Y. S. Gao
Subjects: Nuclear physics, Physics, Particle physics, Electron–positron annihilation, Detector, General Physics and Astronomy, High Energy Physics::Experiment, Resonance (particle physics), Storage ring, Particle identification
Abstract: Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present searches for 25 charmless decay modes of the psi(3770), mostly multibody final states. No evidence for charmless decays is found.
Published: 2006

23. Experimental study ofχb(2P)→ππχb(1P)

Author: Adolf Bornheim, C. Sedlack, G. P. Chen, H. Stoeck, R. A. Briere, E. H. Thorndike, B. K. Heltsley, James E Wiss, R. Gray, Amiran Tomaradze, Sheldon Stone, Paul Avery, Z. Li, D. Riley, M. E. Watkins, K. E. Arms, C. D. Jones, M. R. Shepherd, W. Love, G. Bonvicini, J. P. Alexander, H. Schwarthoff, R. S. Galik, C. S. Park, H. Mendez, L. Fields, D. L. Kreinick, V. Potlia, M. Dubrovin, Yuichi Kubota, M. Weinberger, Kamal K. Seth, G. S. Huang, G. Tatishvili, T. O. Meyer, N. Lowrey, R. Redjimi, L. K. Gibbons, A. J. Sadoff, T. Wilksen, D. Cinabro, Hans J. Vogel, R. Patel, D. Hertz, D. Cronin-Hennessy, A. Lincoln, Junjie Chen, J. A. Ernst, E. J. White, X. Shi, S. B. Athar, I. Danko, D. L. Hartill, S. P. Pappas, K. M. Weaver, I. P.J. Shipsey, J. P. Cummings, L. Breva-Newell, S. A. Dytman, R. Mountain, D. Z. Besson, J. Kandaswamy, Peter K. Zweber, V. Savinov, R. Ehrlich, D. G. Cassel, Li Jingyuan, J. Napolitano, T. E. Coan, N. Menaa, P. Naik, T. K. Pedlar, D. Peterson, F. Liu, Karl Berkelman, H. Muramatsu, A. J. Weinstein, S. Stroiney, A. Lopez, S. W. Gray, D. T. Gong, I. Karliner, Anders Ryd, Jonathan L. Rosner, Tomasz Skwarnicki, H. Mahlke-Krüger, Dong Hee Kim, B. I. Eisenstein, C. Cawlfield, K. M. Ecklund, K. Randrianarivony, K. Y. Gao, M. Anderson, A. Smith, Z. Metreveli, E. A. Phillips, P. Rubin, C. Boulahouache, R. Sia, J. E. Ramirez, J. Butt, Thomas Ferguson, Marina Artuso, James Mueller, J. Williams, Mats A Selen, K. W. Edwards, S. Mehrabyan, B. Sanghi, John Yelton, J. Hietala, J. Pivarski, A. W. Scott, S. Blusk, J. E. Duboscq, G. S. Adams, D. M. Asner, S. E. Csorna, O. Dorjkhaidav, Sean A Dobbs, Jing Wang, B. W. Lang, D. H. Miller, K. Zhang, Peter Onyisi, Werner Sun, R. Poling, Q. He, V. Pavlunin, V. E. Kuznetsov, T. Klein, Y. S. Gao, T. Engelmore, Juliet Ritchie Patterson, N. E. Adam, Horst Severini, and Shuwang Li
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Pion, Pi, Decay chain, Lepton
Abstract: We have searched for the di-pion transition chi_b(2P) -> pi pi chi_b(1P) in the CLEO III sample of Upsilon(3S) decays in the exclusive decay chain: Upsilon(3S) -> gamma chi_b(2P), chi_b(2P) -> pi pi chi_b(1P), chi_b(1P) -> gamma Upsilon(1S), Upsilon(1S) -> lepton pairs. Our studies include both pi+ pi- and pi0 pi0, each analyzed both in fully reconstructed events and in events with one pion undetected. We show that the null hypothesis is not substantiated. Under reasonable assumptions, we find the partial decay width to be Gamma[chi_b(2P) -> pi pi chi_b(1P)] = (0.83 +/- 0.22 +/- 0.08 +/- 0.19) keV, with the uncertainties being statistical, internal CLEO systematics, and common systematics from outside sources.
Published: 2006

24. Observation ofBsProduction at theΥ(5S)Resonance

Author: G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, A. Bornheim, S. P. Pappas, A. J. Weinstein, D. M. Asner, K. W. Edwards, R. A. Briere, G. P. Chen, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, V. Crede, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, L. Gibbons, B. Gittelman, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, M. R. Shepherd, S. Stroiney, W. M. Sun, D. Urner, T. Wilksen, K. M. Weaver, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, G. D. Gollin, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Williams, J. Wiss, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, S. Z. Li, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, K. Arms, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, Y. Maravin, M. Artuso, C. Boulahouache, S. Blusk, J. Butt, O. Dorjkhaidav, J. Li, N. Menaa, R. Mountain, R. Nandakumar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, and S. E. Csorna
Subjects: Physics, Particle physics, Annihilation, Meson production, Meson, General Physics and Astronomy, Resonance, Sigma, High Energy Physics::Experiment, Production (computer science), Cornell Electron Storage Ring, Nuclear Experiment
Abstract: Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the Bs meson in e+e- annihilation at the Upsilon(5S) resonance. We find 14 candidates consistent with Bs decays into final states with a J/psi or a Ds(*)-. The probability that we have observed a background fluctuation is less than 8x10e-10. We have established that at the energy of the Upsilon(5S) resonance Bs meson production proceeds predominantly through the creation of Bs*Bs* pairs. We find sigma(e+e- -> Bs*Bs*) = [0.11 (+0.04-0.03)(stat.)+/-0.02(syst.)] nb, and set the following limits: sigma(e+e- -> BsBs) / sigma(e+e- -> Bs*Bs*) BsBs*) / sigma(e+e- -> Bs*Bs*) < 0.16 at the 90% confidence level. The mass of the Bs* meson is measured to be M(Bs*) = [5.414 +/- 0.001(stat.) +/- 0.003(syst.)] GeV.
Published: 2006

25. Decay of theψ(3770)to light hadrons

Author: G. Tatishvili, T. O. Meyer, Juliet Ritchie Patterson, N. E. Adam, J. P. Cummings, Anders Ryd, D. Z. Besson, V. E. Kuznetsov, K. Zhang, M. Weinberger, Horst Severini, Shuwang Li, T. Klein, E. H. Thorndike, B. W. Lang, James E Wiss, John Yelton, D. Riley, D. H. Miller, I. P.J. Shipsey, Werner Sun, J. Hietala, J. Pivarski, G. Bonvicini, J. P. Alexander, M. Dubrovin, Yuichi Kubota, S. Blusk, G. D. Gollin, R. Nandakumar, R. S. Galik, J. Kandaswamy, H. Schwarthoff, Y. S. Gao, T. E. Coan, S. Stroiney, Jonathan L. Rosner, Tomasz Skwarnicki, G. S. Adams, Hans J. Vogel, A. Smith, M. R. Shepherd, T. K. Pedlar, S. E. Csorna, D. Peterson, Mats A Selen, D. T. Gong, C. Sedlack, Brian Heltsley, Junjie Chen, S. Mehrabyan, K. M. Ecklund, D. L. Hartill, R. Ehrlich, J. E. Duboscq, Z. Li, V. Potlia, R. Redjimi, C. S. Park, Peter K. Zweber, D. Cronin-Hennessy, P. Naik, J. Napolitano, L. K. Gibbons, Peter Onyisi, D. L. Kreinick, H. Mendez, I. Danko, N. Menaa, G. S. Huang, E. J. White, C. D. Jones, A. J. Sadoff, R. Patel, D. Hertz, E. A. Phillips, P. Rubin, L. Fields, T. Wilksen, R. Sia, A. Lopez, X. Shi, J. Butt, Karl Berkelman, R. Poling, Q. He, V. Pavlunin, K. W. Edwards, S. A. Dytman, G. P. Chen, J. C. Wang, H. Muramatsu, V. Savinov, D. M. Asner, H. Stoeck, A. Lincoln, R. A. Briere, H. Mahlke-Krüger, S. B. Athar, K. M. Weaver, Li Jingyuan, C. Boulahouache, C. Cawlfield, K. Y. Gao, Dong-Hyun Kim, L. Breva-Newell, Marina Artuso, B. Sanghi, M. E. Watkins, D. Urner, S. W. Gray, O. Dorjkhaidav, James Mueller, A. W. Scott, Sheldon Stone, Paul Avery, J. Williams, Sean A Dobbs, Z. Metreveli, F. Liu, V. Crede, Kamal K. Seth, R. Mountain, W. Love, D. G. Cassel, I. Karliner, B. I. Eisenstein, K. Randrianarivony, M. Anderson, N. Lowrey, D. Cinabro, B. Gittelman, J. E. Ramirez, Thomas Ferguson, J. A. Ernst, R. Gray, and Amiran Tomaradze
Subjects: Combinatorics, Physics, High Energy Physics - Experiment (hep-ex), Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Hadron, FOS: Physical sciences, Production (computer science), Omega, High Energy Physics - Experiment
Abstract: We describe a search for psi(3770) decay to two-body non-DDbar final states in e+e- data produced by the CESR collider and analyzed with the CLEO-c detector. Vector-pseudoscalar production of Rho0Pi0, Rho+Pi-, OmegaPi0, PhiPi0, RhoEta, OmegaEta, PhiEta, RhoEtaPrime, OmegaEtaPrime, PhiEtaPrime, Kstar0 K0bar, and Kstar+K- is studied along with that of BOnePi (BOne0Pi0 and BOne+Pi-) and Pi+Pi-Pi0. A statistically significant signal is found for PhiEta, at an excess cross section of (2.4 +- 0.6) pb [Gamma_{PhiEta} (psi(3770)) =(74 +- 16)Mev], and a suggestive suppression of Pi+Pi-Pi0 and RhoPi. We conclude with form factor determinations for OmegaPi0, RhoEta, and RhoEtaPrime., Comment: 11 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2005/, Submitted to PRL
Published: 2006

26. Precision Measurements of the Timelike Electromagnetic Form Factors of Pion, Kaon, and Proton

Author: K. M. Weaver, L. Breva-Newell, D. Riley, D. L. Kreinick, A. J. Sadoff, K. Randrianarivony, J. Kandaswamy, D. G. Cassel, T. Wilksen, M. Anderson, Sheldon Stone, Paul Avery, C. Boulahouache, M. Dubrovin, K. W. Edwards, T. K. Pedlar, Xin Shi, G. Tatishvili, T. O. Meyer, J. A. Ernst, K. Zhang, D. L. Hartill, V. E. Kuznetsov, V. Savinov, D. Peterson, Y. S. Gao, I. Karliner, Li Jingyuan, D. T. Gong, Yuichi Kubota, J. E. Ramirez, T. E. Coan, J. P. Cummings, S. W. Gray, Peter K. Zweber, V. Potlia, I. Danko, E. H. Thorndike, B. I. Eisenstein, Kamal K. Seth, R. Redjimi, C. Cawlfield, G. P. Chen, A. J. Weinstein, H. Stoeck, R. A. Briere, M. Weinberger, S. Stroiney, Thomas Ferguson, W. Love, T. Klein, G. Bonvicini, J. P. Alexander, Jonathan L. Rosner, Tomasz Skwarnicki, B. Sanghi, D. Z. Besson, N. Menaa, L. K. Gibbons, K. M. Ecklund, N. Lowrey, S. Mehrabyan, F. Liu, R. Patel, D. Hertz, D. Cinabro, R. S. Galik, M. E. Watkins, M. R. Shepherd, C. D. Jones, R. Gray, James Mueller, Werner Sun, Amiran Tomaradze, E. J. White, J. Williams, B. W. Lang, J. C. Wang, B. K. Heltsley, A. Lincoln, D. H. Miller, S. A. Dytman, R. Mountain, G. S. Huang, K. Y. Gao, Marina Artuso, Ian Shipsey, K. E. Arms, Z. Metreveli, A. W. Scott, G. S. Adams, Adolf Bornheim, Helmut Vogel, C. Sedlack, S. E. Csorna, C. S. Park, L. Fields, R. Ehrlich, John Yelton, J. Hietala, H. Mahlke-Krüger, J. Pivarski, Z. Li, Mats A Selen, Peter Onyisi, J. Napolitano, D. M. Asner, R. Poling, Q. He, V. Pavlunin, E. A. Phillips, Alan D. Lopez, P. Rubin, R. Sia, Junjie Chen, J. Butt, Juliet Ritchie Patterson, N. E. Adam, H. Mendez, S. B. Athar, Horst Severini, A. Smith, Dong-Hyun Kim, Shuwang Li, Anders Ryd, P. Naik, Karl Berkelman, H. Muramatsu, H. Schwarthoff, James E Wiss, S. P. Pappas, O. Dorjkhaidav, Daniel P Cronin-Hennessy, Sean A Dobbs, S. Blusk, and J. E. Duboscq
Subjects: Quantum chromodynamics, Physics, Particle physics, Annihilation, Proton, Electron–positron annihilation, FOS: Physical sciences, General Physics and Astronomy, Perturbative QCD, large-momentum-transfer, exclusive processes, quantum chromodynamics, pseudoscalar mesons, perturbative qcd, scaling laws, detector, gev2, q2, Particle identification, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, Positron, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Using 20.7 pb^-1 of e+e- annihilation data taken at sqrt{s} = 3.671 GeV with the CLEO-c detector, precision measurements of the electromagnetic form factors of the charged pion, charged kaon, and proton have been made for timelike momentum transfer of |Q^2| = 13.48 GeV^2 by the reaction e+e- to h+h-. The measurements are the first ever with identified pions and kaons of |Q^2| > 4 GeV^2, with the results F_pi(13.48 GeV^2) = 0.075+-0.008(stat)+-0.005(syst) and F_K(13.48 GeV^2) = 0.063+-0.004(stat)+-0.001(syst). The result for the proton, assuming G^p_E = G^p_M, is G^p_M(13.48 GeV^2) = 0.014+-0.002(stat)+-0.001(syst), which is in agreement with earlier results., 9 pages postscript,also available through thishttp://www.lns.cornell.edu/public/CLNS/2005/, Submitted to PRL
Published: 2005

27. Evidence forBs()B¯s()Production at theΥ(5S)Resonance

Author: W. Love, E. A. Phillips, D. Riley, K. Randrianarivony, P. Rubin, R. Sia, J. Butt, James E Wiss, E. H. Thorndike, M. Dubrovin, I. P.J. Shipsey, B. K. Heltsley, M. E. Watkins, G. Bonvicini, J. P. Alexander, G. D. Gollin, D. Cronin-Hennessy, A. Smith, I. Danko, J. Napolitano, N. Lowrey, D. Cinabro, H. Schwarthoff, Werner Sun, D. G. Cassel, B. Gittelman, Yuichi Kubota, S. Mehrabyan, Y. S. Gao, S. P. Pappas, Ryszard Stroynowski, K. M. Ecklund, F. Liu, Adolf Bornheim, R. S. Galik, C. Sedlack, I. Karliner, Z. Li, R. Ehrlich, D. L. Kreinick, C. S. Park, A. J. Sadoff, B. I. Eisenstein, Alan D. Lopez, Hans J. Vogel, T. Wilksen, Xin Shi, V. Crede, K. W. Edwards, Junjie Chen, V. Potlia, H. Mahlke-Krüger, J. E. Ramirez, V. E. Kuznetsov, V. Savinov, K. E. Arms, C. Boulahouache, R. Redjimi, R. Mountain, L. Fields, L. K. Gibbons, K. Y. Gao, M. Weinberger, T. K. Pedlar, K. M. Weaver, Li Jingyuan, Anders Ryd, R. Patel, D. Hertz, B. Sanghi, James Mueller, L. Breva-Newell, T. Klein, Thomas Ferguson, J. Williams, D. Urner, R. Gray, Z. Metreveli, M. Cravey, M. R. Shepherd, A. W. Scott, C. D. Jones, T. E. Coan, A. J. Weinstein, S. Stroiney, P. Naik, Amiran Tomaradze, Jonathan L. Rosner, Tomasz Skwarnicki, G. S. Huang, Karl Berkelman, J. C. Wang, H. Muramatsu, H. Mendez, S. B. Athar, G. Tatishvili, T. O. Meyer, Dong-Hyun Kim, J. P. Cummings, D. Z. Besson, John Yelton, J. Hietala, J. Pivarski, C. Cawlfield, J. Kandaswamy, Mats A Selen, J. A. Ernst, D. L. Hartill, Peter K. Zweber, D. Peterson, O. Dorjkhaidav, N. Menaa, D. T. Gong, Sean A Dobbs, S. Blusk, J. E. Duboscq, D. M. Asner, K. Zhang, G. S. Adams, S. E. Csorna, B. W. Lang, Marina Artuso, D. H. Miller, Peter Onyisi, R. Poling, Q. He, V. Pavlunin, Juliet Ritchie Patterson, N. E. Adam, Horst Severini, Shuwang Li, K. K. Seth, Sheldon Stone, Paul Avery, S. W. Gray, R. Nandakumar, G. P. Chen, H. Stoeck, R. A. Briere, E. J. White, and S. A. Dytman
Subjects: Physics, Particle decay, Pair production, Meson, Electron–positron annihilation, Hadron, Analytical chemistry, General Physics and Astronomy, Resonance, Cornell Electron Storage Ring, Atomic physics, Particle identification
Abstract: We use data collected by the CLEO III detector at the Cornell Electron Storage Ring to measure the inclusive yields of D(s) mesons as B(Y(5S) --> D(s)X) = (44-7 +/- 4.2 +/- 9.9)% and B(Y(4S) --> D(s)X) = (18.1 +/- 0.5 +/- 2.8)%. From these measurements, we make a model dependent estimate of the ratio of B(s)*B(s)* to the total bb quark pair production of (16.0 +/- 2.6 +/- 5.8)% at the Y(5S) energy.
Published: 2005

28. Improved Measurement ofB(D+→μ+ν)and the Pseudoscalar Decay ConstantfD+

Author: G. Tatishvili, T. O. Meyer, J. P. Cummings, D. Z. Besson, H. Schwarthoff, K. Y. Gao, Marina Artuso, I. P.J. Shipsey, C. Sedlack, B. K. Heltsley, James E Wiss, R. Nandakumar, D. Riley, G. D. Gollin, Z. Metreveli, A. W. Scott, M. Dubrovin, D. Cronin-Hennessy, J. Napolitano, F. Liu, Xin Shi, D. L. Kreinick, V. E. Kuznetsov, E. A. Phillips, I. Danko, Y. S. Gao, K. W. Edwards, G. P. Chen, P. Rubin, Anders Ryd, Yuichi Kubota, A. J. Sadoff, T. Wilksen, R. Sia, K. M. Weaver, M. Weinberger, J. Butt, H. Stoeck, R. A. Briere, B. Sanghi, V. Crede, L. Breva-Newell, R. Ehrlich, C. Cawlfield, G. S. Adams, C. D. Jones, A. Smith, T. Klein, H. Mahlke-Krüger, V. Savinov, T. K. Pedlar, Li Jingyuan, James Mueller, J. Williams, D. G. Cassel, Werner Sun, K. M. Ecklund, N. Lowrey, D. Cinabro, B. Gittelman, M. R. Shepherd, P. Naik, I. Karliner, E. H. Thorndike, S. E. Csorna, E. J. White, John Yelton, J. Hietala, Karl Berkelman, H. Muramatsu, G. S. Huang, S. A. Dytman, J. Pivarski, D. L. Hartill, B. I. Eisenstein, G. Bonvicini, J. P. Alexander, S. W. Gray, K. K. Seth, Sheldon Stone, Peter K. Zweber, Paul Avery, K. Randrianarivony, N. Menaa, M. Anderson, J. Kandaswamy, J. A. Ernst, J. E. Ramirez, D. Peterson, H. Mendez, S. B. Athar, D. T. Gong, B. W. Lang, W. Love, Thomas Ferguson, D. H. Miller, Dong-Hyun Kim, O. Dorjkhaidav, D. Urner, Mats A Selen, J. C. Wang, A. Lincoln, K. Zhang, Sean A Dobbs, C. S. Park, R. Gray, L. Fields, Amiran Tomaradze, S. Blusk, Alan D. Lopez, Hans J. Vogel, C. Boulahouache, T. E. Coan, S. Stroiney, Jonathan L. Rosner, Junjie Chen, J. E. Duboscq, Peter Onyisi, T. Skwarnicki, R. Poling, Q. He, V. Pavlunin, D. M. Asner, Z. Li, Juliet Ritchie Patterson, N. E. Adam, S. Mehrabyan, Horst Severini, M. E. Watkins, R. Mountain, Shuwang Li, V. Potlia, R. Redjimi, L. K. Gibbons, R. Patel, and D. Hertz
Subjects: Physics, Particle decay, Antiparticle, Particle physics, Muon, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, Hadron, Analytical chemistry, General Physics and Astronomy, Resonance, B meson
Abstract: We extract a relatively precise value for the decay constant of the D{sup +} meson by measuring B(D{sup +}{yields}{mu}{sup +}{nu})=(4.40{+-}0.66{sub -0.12}{sup +0.09})x10{sup -4} using 281 pb{sup -1} of data taken on the {psi}(3770) resonance with the CLEO-c detector. We find f{sub D{sup +}}=(222.6{+-}16.7{sub -3.4}{sup +2.8}) MeV, and compare with current theoretical calculations. We also set a 90% confidence upper limit on B(D{sup +}{yields}e{sup +}{nu})
Published: 2005

29. Observation of theP11state of charmonium

Author: D. L. Hartill, Ron Poling, Peter K. Zweber, N. Menaa, B. W. Lang, D. H. Miller, G. Tatishvili, T. O. Meyer, Werner Sun, V. E. Kuznetsov, T. Klein, C. Cawlfield, K. Y. Gao, M. R. Shepherd, Z. Li, A. H. Mahmood, E. A. Phillips, P. Rubin, J. P. Cummings, R. Sia, K. Randrianarivony, G. P. Chen, C. S. Park, K. Zhang, H. Mendez, D. Z. Besson, J. Butt, H. Stoeck, K. M. Ecklund, S. B. Athar, E. H. Thorndike, R. Mountain, M. Weinberger, R. A. Briere, Dong-Hyun Kim, P. Naik, L. Fields, V. Potlia, R. Redjimi, N. Lowrey, D. Cinabro, H. Schwarthoff, G. Bonvicini, V. Crede, L. K. Gibbons, G. S. Adams, J. P. Alexander, O. Dorjkhaidav, B. Gittelman, Mats A Selen, Karl Berkelman, H. Muramatsu, G. S. Huang, I. Danko, R. Patel, D. Hertz, S. E. Csorna, D. Urner, R. S. Galik, T. E. Coan, Y. S. Gao, R. Ehrlich, Daniel P Cronin-Hennessy, R. Nandakumar, Sean A Dobbs, Alan D. Lopez, S. Stroiney, Hans J. Vogel, B. K. Heltsley, K. M. Weaver, Anders Ryd, James E Wiss, T. K. Pedlar, Jonathan L. Rosner, M. E. Watkins, L. Breva-Newell, J. Kandaswamy, Junjie Chen, G. D. Gollin, I. P.J. Shipsey, J. A. Ernst, S. W. Gray, D. Riley, M. Cravey, W. Love, John Yelton, J. E. Ramirez, D. Peterson, J. Hietala, H. Mahlke-Krüger, M. Dubrovin, Marina Artuso, K. W. Edwards, D. T. Gong, J. Napolitano, J. Pivarski, C. Boulahouache, D. L. Kreinick, A. J. Sadoff, K. K. Seth, T. Wilksen, Thomas Ferguson, E. J. White, F. Liu, Sheldon Stone, Paul Avery, Yuichi Kubota, D. M. Asner, S. A. Dytman, D. G. Cassel, James Mueller, S. Blusk, J. Williams, C. Sedlack, S. Mehrabyan, J. E. Duboscq, V. Savinov, Li Jingyuan, W. Park, R. Gray, I. Karliner, A. Smith, Amiran Tomaradze, Z. Metreveli, B. I. Eisenstein, T. Skwarnicki, J. C. Wang, A. W. Scott, Xin Shi, Peter Onyisi, Q. He, V. Pavlunin, B. Sanghi, C. D. Jones, Juliet Ritchie Patterson, N. E. Adam, Horst Severini, and Shuwang Li
Subjects: Physics, Nuclear and High Energy Physics, Crystallography, Annihilation, Branching fraction, Particle interaction, Atomic physics, Hyperfine structure
Abstract: The spin-singlet P-wave state of charmonium, h{sub c}({sup 1}P{sub 1}), has been observed in the decay {psi}(2S){yields}{pi}{sup 0}h{sub c} followed by h{sub c}{yields}{gamma}{eta}{sub c}. Inclusive and exclusive analyses of the M(h{sub c}) spectrum have been performed. Two complementary inclusive analyses select either a range of energies for the photon emitted in h{sub c}{yields}{gamma}{eta}{sub c} or a range of values of M({eta}{sub c}). These analyses, consistent with one another within statistics, yield M(h{sub c})=[3524.9{+-}0.7 (stat){+-}0.4 (sys)] MeV/c{sup 2} and a product of the branching ratios B{sub {psi}}({psi}(2S){yields}{pi}{sup 0}h{sub c})xB{sub h}(h{sub c}{yields}{gamma}{eta}{sub c})=[3.5{+-}1.0 (stat){+-}0.7 (sys)]x10{sup -4}. When the {eta}{sub c} is reconstructed in seven exclusive decay modes, 17.5{+-}4.5 h{sub c} events are seen with an average mass M(h{sub c})=[3523.6{+-}0.9 (stat){+-}0.5 (sys)] MeV/c{sup 2}, and B{sub {psi}}B{sub h}=[5.3{+-}1.5 (stat){+-}1.0 (sys)]x10{sup -4}. If combined, the inclusive and exclusive data samples yield an overall mass M(h{sub c})=[3524.4{+-}0.6 (stat){+-}0.4 (sys)] MeV/c{sup 2} and product of branching ratios B{sub {psi}}B{sub h}=[4.0{+-}0.8 (stat){+-}0.7 (sys)]x10{sup -4}. The h{sub c} mass implies a P-wave hyperfine splitting {delta}M{sub HF}(1P){identical_to} -M(1{sup 1}P{sub 1})=[1.0{+-}0.6 (stat){+-}0.4 (sys)] MeV/c{sup 2}.
Published: 2005

30. Search for Rare and Forbidden DecaysD+→h±e∓e+

Author: G. P. Chen, O. Dorjkhaidav, Sean A Dobbs, H. Stoeck, R. A. Briere, R. Nandakumar, G. Tatishvili, E. H. Thorndike, S. Blusk, J. E. Duboscq, T. O. Meyer, D. M. Asner, James E Wiss, G. Bonvicini, John Yelton, J. Hietala, H. Mendez, J. P. Alexander, S. B. Athar, J. P. Cummings, J. Pivarski, D. L. Hartill, Dong-Hyun Kim, D. Z. Besson, J. Napolitano, T. E. Coan, F. Liu, Peter K. Zweber, M. Weinberger, N. Menaa, S. Stroiney, R. Gray, E. A. Phillips, Jonathan L. Rosner, Tomasz Skwarnicki, Ian Shipsey, P. Rubin, R. S. Galik, Xin Shi, M. R. Shepherd, Amiran Tomaradze, R. Sia, S. W. Gray, K. K. Seth, K. W. Edwards, J. Butt, R. Ehrlich, Alan D. Lopez, C. Sedlack, Hans J. Vogel, V. Potlia, R. Redjimi, Sheldon Stone, D. Riley, Paul Avery, V. Crede, D. Cronin-Hennessy, L. K. Gibbons, T. K. Pedlar, R. Patel, I. Danko, M. Dubrovin, D. Hertz, Marina Artuso, E. J. White, G. S. Huang, S. A. Dytman, B. Sanghi, C. S. Park, Mats A Selen, Junjie Chen, Yuichi Kubota, H. Mahlke-Krüger, A. Smith, C. Boulahouache, Z. Metreveli, M. E. Watkins, L. Fields, Z. Li, J. Kandaswamy, K. M. Ecklund, J. A. Ernst, A. W. Scott, D. L. Kreinick, G. S. Adams, A. J. Sadoff, T. Wilksen, D. Peterson, K. M. Weaver, S. E. Csorna, S. Mehrabyan, V. Savinov, D. T. Gong, Li Jingyuan, L. Breva-Newell, C. Cawlfield, B. K. Heltsley, Jing Wang, K. Y. Gao, D. Urner, B. W. Lang, D. H. Miller, James Mueller, J. Williams, K. Zhang, V. E. Kuznetsov, T. Klein, George D Gollin, H. Schwarthoff, Werner Sun, C. D. Jones, Y. S. Gao, M. Cravey, W. Love, R. Mountain, D. G. Cassel, Juliet Ritchie Patterson, I. Karliner, B. I. Eisenstein, N. E. Adam, Horst Severini, Shuwang Li, Peter Onyisi, R. Poling, Q. He, V. Pavlunin, N. Lowrey, P. Naik, D. Cinabro, B. Gittelman, Karl Berkelman, H. Muramatsu, K. Randrianarivony, J. E. Ramirez, Thomas Ferguson, and Anders Ryd
Subjects: Semileptonic decay, Physics, Particle physics, Meson, High Energy Physics::Phenomenology, Hadron, Analytical chemistry, General Physics and Astronomy, Resonance, Quarkonium, Particle identification, Particle decay, Pion, High Energy Physics::Experiment
Abstract: Using 0.8 x 10(6) D+ D- pairs collected with the CLEO-c detector at the psi(3770) resonance, we have searched for flavor-changing neutral current and lepton-number-violating decays of D+ mesons to final states with dielectrons. We find no indication of either, obtaining 90% confidence level upper limits of B(D+ --> pi+ e+ e-) pi- e+ d+) K+ e+ e-) K- e+ e+) < 4.5 x 10(-6).
Published: 2005

31. Branching-fraction measurements ofψ(2S)decay to baryon-antibaryon final states

Author: S. Blusk, H. Schwarthoff, C. Cawlfield, N. Lowrey, D. Cinabro, B. Gittelman, J. E. Duboscq, T. E. Coan, S. Stroiney, Jonathan L. Rosner, Tomasz Skwarnicki, D. L. Hartill, A. H. Mahmood, Peter Onyisi, W. Love, Werner Sun, V. Potlia, R. Redjimi, M. Cravey, E. H. Thorndike, Peter K. Zweber, N. Menaa, B. K. Heltsley, G. D. Gollin, V. Crede, L. K. Gibbons, R. Patel, D. Hertz, S. Mehrabyan, G. Bonvicini, J. P. Alexander, A. Smith, James E Wiss, G. P. Chen, C. Sedlack, James Mueller, J. Williams, D. L. Kreinick, A. J. Sadoff, T. Wilksen, C. Boulahouache, H. Stoeck, R. A. Briere, M. E. Watkins, W. Park, C. S. Park, J. Napolitano, B. W. Lang, D. H. Miller, L. Fields, G. Tatishvili, T. O. Meyer, R. Ehrlich, H. Mendez, S. B. Athar, V. Savinov, H. Mahlke-Krüger, A. W. Scott, T. K. Pedlar, J. Kandaswamy, Z. Li, J. P. Cummings, D. Z. Besson, K. Randrianarivony, P. Naik, J. A. Ernst, Li Jingyuan, I. P.J. Shipsey, R. Nandakumar, Karl Berkelman, H. Muramatsu, Xin Shi, C. D. Jones, D. Peterson, D. T. Gong, Dong-Hyun Kim, K. W. Edwards, O. Dorjkhaidav, Anders Ryd, J. C. Wang, Sean A Dobbs, F. Liu, D. M. Asner, Y. S. Gao, Z. Metreveli, K. Y. Gao, D. Urner, D. Cronin-Hennessy, I. Danko, B. Sanghi, K. K. Seth, Sheldon Stone, E. A. Phillips, P. Rubin, R. Sia, Paul Avery, J. Butt, E. J. White, S. A. Dytman, G. S. Adams, R. Poling, Q. He, V. Pavlunin, J. E. Ramirez, Marina Artuso, S. W. Gray, S. E. Csorna, Thomas Ferguson, Mats A Selen, Juliet Ritchie Patterson, N. E. Adam, R. Gray, R. Mountain, Amiran Tomaradze, Horst Severini, D. G. Cassel, Shuwang Li, K. Zhang, John Yelton, J. Hietala, I. Karliner, J. Pivarski, B. I. Eisenstein, K. M. Ecklund, Alan D. Lopez, Hans J. Vogel, D. Riley, Junjie Chen, M. Dubrovin, V. E. Kuznetsov, Yuichi Kubota, T. Klein, M. Weinberger, K. M. Weaver, L. Breva-Newell, M. R. Shepherd, and G. S. Huang
Subjects: Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Particle physics, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Hyperon, Sigma, Lambda, Omega, Particle identification
Abstract: Using 3.08x10{sup 6} {psi}(2S) decays observed in e{sup +}e{sup -} collisions by the CLEO detector, we present the results of a study of the {psi}(2S) decaying into baryon-antibaryon final states. We report the most precise measurements of the following eight modes: pp, {lambda}{lambda}, {sigma}{sup +}{sigma}{sup +} (first observation), {sigma}{sup 0}{sigma}{sup 0}, {xi}{sup -}{xi}{sup -}, and {xi}{sup 0}{xi}{sup 0} (first observation), and place upper limits for the modes {xi}(1530){sup 0}{xi}(1530){sup 0} and {omega}{sup -}{omega}{sup -}.
Published: 2005

32. Search for exclusive multibody non- decays at the resonance

Author: G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Cravey, J P, Cummings, I, Danko, J, Napolitano, Q, He, H, Muramatsu, C S, Park, E H, Thorndike, T E, Coan, Y S, Gao, F, Liu, M, Artuso, C, Boulahouache, S, Blusk, J, Butt, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, M E, Watkins, J L, Rosner, N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, R S, Galik, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, T, Wilksen, K M, Weaver, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, E J, White, J, Williams, J, Wiss, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, H, Severini, D M, Asner, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, and J, Ramirez
Abstract: Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present searches for 25 charmless decay modes of the psi(3770), mostly multibody final states. No evidence for charmless decays is found.
Published: 2005

33. Observation of Psi(3770)--gammachi(c1)--gammagammaJ/Psi

Author: T E, Coan, Y S, Gao, F, Liu, M, Artuso, C, Boulahouache, S, Blusk, J, Butt, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, A, Lincoln, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, M E, Watkins, J L, Rosner, N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, R S, Galik, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, T, Wilksen, K M, Weaver, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, E J, White, J, Williams, J, Wiss, D M, Asner, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, H, Severini, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, J, Ramirez, G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Anderson, J P, Cummings, I, Danko, J, Napolitano, Q, He, H, Muramatsu, C S, Park, and E H, Thorndike
Abstract: From e(+)e(-) collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-DD(_) decay Psi(3770))--gammachi(c1) with a statistical significance of 6.6 standard deviations, using the two-photon cascades to J/Psi and J/Psi--l(+)l(-). We determine sigma(e(=)e(-)--Psi(3770))xBeta(Psi(3770)--gammachi(c1))=(18.0 +/- 3.3 +/- 2.5) pb and branching fraction Beta(Psi(3770)--gammachi(c1)=(2.8 +/- 0.5+/-0.4) x 10(-3). We set 90% C.L. upper limits for the transition to chi(c2) (chi(c0)): sigma x Beta5.7 pb (282 pb) and Beta0.9 x 10(-3) (44 x 10(-3)). We also determine Gamma(Psi(3770)gammachi(c1))/Gamma(Psi(3770)--pi(+)pi(-)J/Psi)=1.5 +/- 0.3 +/- 0.3 (1.0 at 90% C.L.), which bears upon the interpretation of X(3872).
Published: 2005

34. Measurement of Absolute Hadronic Branching Fractions ofDMesons ande+e−→DD¯Cross Sections atEc.m.=3773 MeV

Author: E. H. Thorndike, G. S. Adams, V. Potlia, R. Redjimi, G. Bonvicini, J. P. Alexander, S. E. Csorna, L. K. Gibbons, James Mueller, J. Williams, Peter Onyisi, R. Patel, D. Hertz, R. Ehrlich, W. Park, H. Mahlke-Krüger, E. A. Phillips, P. Rubin, D. Riley, H. Schwarthoff, Q. He, V. Pavlunin, Mats A Selen, S. Mehrabyan, Z. Metreveli, S. Blusk, E. Dambasuren, R. Sia, R. Mountain, G. Tatishvili, T. O. Meyer, J. E. Duboscq, R. Gray, J. Butt, C. Cawlfield, M. Chasse, M. Dubrovin, I. P.J. Shipsey, B. W. Lang, Amiran Tomaradze, I. Danko, K. M. Ecklund, W. Love, James E Wiss, D. H. Miller, M. E. Watkins, T. E. Coan, Juliet Ritchie Patterson, N. E. Adam, T. K. Pedlar, S. Stroiney, V. E. Kuznetsov, Jonathan L. Rosner, Tomasz Skwarnicki, J. P. Cummings, Horst Severini, B. K. Heltsley, P. Naik, Sheldon Stone, Alan D. Lopez, C. D. Jones, Hans J. Vogel, Junjie Chen, A. W. Scott, G. D. Gollin, Paul Avery, K. M. Weaver, L. Hsu, T. Klein, D. Z. Besson, Shuwang Li, S. W. Gray, D. L. Kreinick, O. Dorjkhaidav, A. J. Sadoff, L. Breva-Newell, Z. Li, J. C. Wang, K. Zhang, D. Urner, Karl Berkelman, H. Muramatsu, T. Wilksen, Yuichi Kubota, A. H. Mahmood, X. Shi, F. Liu, Werner Sun, D. M. Asner, H. Mendez, S. B. Athar, John Yelton, C. S. Park, J. Hietala, Daniel P Cronin-Hennessy, Sean A Dobbs, V. Savinov, K. W. Edwards, M. Weinberger, Li Jingyuan, K. Y. Gao, Dong-Hyun Kim, L. Fields, M. R. Shepherd, J. Pivarski, C. Boulahouache, J. Napolitano, V. Crede, D. L. Hartill, B. Sanghi, Ron Poling, Marina Artuso, R. Nandakumar, C. Sedlack, G. S. Huang, Peter K. Zweber, N. Menaa, Kamal K. Seth, J. Kandaswamy, M. Cravey, Anders Ryd, Y. S. Gao, S. A. Dytman, J. A. Ernst, G. P. Chen, H. Stoeck, D. Peterson, R. A. Briere, D. T. Gong, A. Smith, D. G. Cassel, I. Karliner, B. I. Eisenstein, N. Lowrey, D. Cinabro, B. Gittelman, J. E. Ramirez, Thomas Ferguson, and K. Randrianarivony
Subjects: Physics, Antiparticle, Particle decay, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Atomic physics, Dimensionless quantity
Abstract: Using $55.8\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collisions recorded at the $\ensuremath{\psi}(3770)$ resonance with the CLEO-c detector at CESR, we determine absolute hadronic branching fractions of charged and neutral $D$ mesons using a double tag technique. Among measurements for three ${D}^{0}$ and six ${D}^{+}$ modes, we obtain reference branching fractions $\mathcal{B}({D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+})=(3.91\ifmmode\pm\else\textpm\fi{}0.08\ifmmode\pm\else\textpm\fi{}0.09)%$ and $\mathcal{B}({D}^{+}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+})=(9.5\ifmmode\pm\else\textpm\fi{}0.2\ifmmode\pm\else\textpm\fi{}0.3)%$, where the uncertainties are statistical and systematic, respectively. Final state radiation is included in these branching fractions by allowing for additional, unobserved, photons in the final state. Using a determination of the integrated luminosity, we also extract the cross sections $\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0})=(3.60\ifmmode\pm\else\textpm\fi{}{0.07}_{\ensuremath{-}0.05}^{+0.07})\text{ }\text{ }\mathrm{nb}$ and $\ensuremath{\sigma}({e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{+}{D}^{\ensuremath{-}})=(2.79\ifmmode\pm\else\textpm\fi{}{0.07}_{\ensuremath{-}0.04}^{+0.10})\text{ }\text{ }\mathrm{nb}$.
Published: 2005

35. Observation of thehc(P11)State of Charmonium

Author: E. H. Thorndike, G. Bonvicini, Peter Onyisi, G. S. Adams, M. R. Shepherd, J. P. Alexander, S. E. Csorna, Q. He, V. Pavlunin, K. Zhang, C. Sedlack, G. S. Huang, I. P.J. Shipsey, R. S. Galik, P. Naik, B. W. Lang, D. H. Miller, Werner Sun, Juliet Ritchie Patterson, N. E. Adam, G. Tatishvili, K. Randrianarivony, T. O. Meyer, O. Dorjkhaidav, Xin Shi, D. G. Cassel, S. W. Gray, Karl Berkelman, H. Muramatsu, Horst Severini, Daniel P Cronin-Hennessy, Sean A Dobbs, M. Cravey, K. M. Weaver, L. Breva-Newell, J. Kandaswamy, G. P. Chen, H. Stoeck, R. A. Briere, J. A. Ernst, D. Urner, R. Nandakumar, Shuwang Li, J. P. Cummings, T. K. Pedlar, I. Karliner, D. Z. Besson, D. Peterson, D. L. Hartill, Ron Poling, Peter K. Zweber, K. W. Edwards, F. Liu, D. M. Asner, James E Wiss, D. T. Gong, H. Schwarthoff, A. Smith, B. I. Eisenstein, J. E. Ramirez, J. C. Wang, R. Gray, N. Menaa, C. Cawlfield, Amiran Tomaradze, Z. Li, C. Boulahouache, B. Sanghi, V. E. Kuznetsov, S. Blusk, D. Riley, V. Crede, R. Mountain, J. E. Duboscq, Thomas Ferguson, T. Klein, S. Mehrabyan, V. Potlia, K. K. Seth, R. Redjimi, W. Love, L. K. Gibbons, C. D. Jones, Sheldon Stone, Mats A Selen, R. Patel, Paul Avery, D. Hertz, Y. S. Gao, M. Dubrovin, T. Skwarnicki, N. Lowrey, D. Cinabro, Marina Artuso, John Yelton, J. Hietala, J. Pivarski, Anders Ryd, A. W. Scott, J. Napolitano, Yuichi Kubota, M. Weinberger, B. Gittelman, E. A. Phillips, P. Rubin, R. Sia, E. J. White, J. Butt, C. S. Park, S. A. Dytman, L. Fields, M. E. Watkins, T. E. Coan, S. Stroiney, Jonathan L. Rosner, K. Y. Gao, H. Mendez, S. B. Athar, K. M. Ecklund, D. L. Kreinick, A. J. Sadoff, T. Wilksen, Dong-Hyun Kim, V. Savinov, Li Jingyuan, B. K. Heltsley, G. D. Gollin, Alan D. Lopez, Hans J. Vogel, Junjie Chen, A. H. Mahmood, R. Ehrlich, I. Danko, H. Mahlke-Krüger, Z. Metreveli, James Mueller, J. Williams, and W. Park
Subjects: Physics, Hadronic decay, Particle physics, Crystallography, Electron–positron annihilation, General Physics and Astronomy, High Energy Physics::Experiment, State (functional analysis), Nuclear Experiment, Hyperfine structure, Particle identification
Abstract: The h{sub c}({sup 1}P{sub 1}) state of charmonium has been observed in the reaction {psi}(2S){yields}{pi}{sup 0}h{sub c}{yields}({gamma}{gamma})({gamma}{eta}{sub c}) using 3.08x10{sup 6} {psi}(2S) decays recorded in the CLEO detector. Data have been analyzed both for the inclusive reaction, where the decay products of the {eta}{sub c} are not identified, and for exclusive reactions, in which {eta}{sub c} decays are reconstructed in seven hadronic decay channels. We find M(h{sub c})=3524.4{+-}0.6{+-}0.4 MeV which corresponds to a hyperfine splitting {delta}M{sub hf}(1P){identical_to} -M({sup 1}P{sub 1})=+1.0{+-}0.6{+-}0.4 MeV, and B({psi}(2S){yields}{pi}{sup 0}h{sub c})xB(h{sub c}{yields}{gamma}{eta}{sub c})=(4.0{+-}0.8{+-}0.7)x10{sup -4}.
Published: 2005

36. Searches forCPviolation andππSwave in the Dalitz-plot analysis ofD0→π+π−π0

Author: P. Rubin, W. Love, Werner Sun, R. Sia, J. R. Patterson, K. Zhang, J. Butt, Y. S. Gao, P. Naik, Karl Berkelman, H. Muramatsu, L. Gibbons, Anders Ryd, G. Tatishvili, T. O. Meyer, K. M. Ecklund, J. P. Cummings, G. Bonvicini, J. P. Alexander, D. Z. Besson, James E Wiss, L. Hsu, K. K. Gan, R. Gray, T. E. Coan, A. J. Weinstein, Peter Onyisi, J. E. Ramirez, L. Breva-Newell, I. Karliner, S. Stroiney, G. S. Adams, S. P. Pappas, R. S. Galik, Amiran Tomaradze, A. J. Sadoff, V. Potlia, T. Wilksen, M. Weinberger, V. E. Kuznetsov, Dong Hee Kim, B. I. Eisenstein, Adolf Bornheim, Xin Shi, Jonathan L. Rosner, Tomasz Skwarnicki, C. D. Jones, S. E. Csorna, R. Redjimi, C. Sedlack, Q. He, J. Kandaswamy, V. Pavlunin, K. W. Edwards, R. Patel, D. Hertz, I. P.J. Shipsey, J. Napolitano, N. Lowrey, T. Klein, D. Cinabro, M. R. Shepherd, George D Gollin, D. G. Cassel, M. E. Watkins, T. K. Pedlar, Sheldon Stone, V. Savinov, B. Gittelman, James Mueller, Paul Avery, J. Williams, R. Mountain, B. Sanghi, I. Danko, John Yelton, J. Hietala, G. S. Huang, Li Jingyuan, E. Dambasuren, T. Ferguson, J. C. Wang, J. A. Ernst, N. E. Adam, B. W. Lang, D. L. Hartill, J. Pivarski, W. Park, A. Smith, K. Randrianarivony, D. H. Miller, Ron Poling, H. Schwarthoff, Ryszard Stroynowski, K. Y. Gao, Horst Severini, C. Plager, M. Chasse, A. W. Scott, Peter K. Zweber, Z. Metreveli, D. L. Kreinick, Z. Li, H. Mendez, S. B. Athar, Shuwang Li, N. Menaa, Marina Artuso, C. S. Park, R. Nandakumar, D. Riley, A. H. Mahmood, B. K. Heltsley, M. Dubrovin, L. Fields, R. Ehrlich, D. Peterson, K. E. Arms, Yuichi Kubota, H. Mahlke-Krüger, G. P. Chen, M. Cravey, H. Stoeck, R. A. Briere, E. H. Thorndike, F. Liu, Mats A Selen, D. T. Gong, D. M. Asner, C. Cawlfield, Alan D. Lopez, Hans J. Vogel, V. Crede, Junjie Chen, Kamal K. Seth, S. W. Gray, S. A. Dytman, O. Dorjkhaidav, Daniel P Cronin-Hennessy, Sean A Dobbs, S. Blusk, J. E. Duboscq, D. Urner, C. Boulahouache, and S. Mehrabyan
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, media_common.quotation_subject, Dalitz plot, Asymmetry, Nuclear physics, Formalism (philosophy of mathematics), Amplitude, S-wave, Pi, Substructure, CP violation, media_common
Abstract: In e+e- collisions recorded using the CLEO II.V detector we have studied the Cabibbo suppressed decay of D0 -> pi+pi-pi0 with the initial flavor of the D0 tagged by the decay D*+ -> D0pi+. We use the Dalitz-plot analysis technique to measure the resonant substructure in this final state and observe \rho\pi and non-resonant contributions by fitting for their amplitudes and relative phases. We describe the pipi S-wave with a K-matrix formalism and limit this contribution to the rate to be pi+pi-pi+ decay. Using the amplitudes and phases from this analysis, we calculate an integrated CP asymmetry of 0.01^{+0.09}_{-0.07} +/- 0.05.
Published: 2005

37. Improved measurement of B(D+ --mu+nu) and the pseudoscalar decay constant fD+

Author: M, Artuso, C, Boulahouache, S, Blusk, J, Butt, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, A, Lincoln, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, M E, Watkins, J L, Rosner, N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, T, Wilksen, K M, Weaver, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, E J, White, J, Williams, J, Wiss, D M, Asner, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, H, Severini, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, J, Ramirez, G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Anderson, J P, Cummings, I, Danko, J, Napolitano, Q, He, H, Muramatsu, C S, Park, E H, Thorndike, T E, Coan, Y S, Gao, and F, Liu
Abstract: We extract a relatively precise value for the decay constant of the meson by measuring B(D+ --mu+nu) = (4.40 +/-0.66(+0.09)(-0.12) x 10(-4) using 281 pb(-1) of data taken on phi(3770) the resonance with the CLEO-c detector. We find fD+ = (222.6 +/- 16.7(+2.8)(-3.4)) MeV, and compare with current theoretical calculations. We also set a 90% confidence upper limit on B(D+e+nu)2.4 x 10(-5) which constrains new physics models.
Published: 2005

38. Evidence for Bs* Bs* production at the Gamma(5S) resonance

Author: M, Artuso, C, Boulahouache, S, Blusk, J, Butt, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, A, Bornheim, S P, Pappas, A J, Weinstein, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, M E, Watkins, J L, Rosner, N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, R S, Galik, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, T, Wilksen, K M, Weaver, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, E J, White, J, Williams, J, Wiss, D M, Asner, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, K, Arms, H, Severini, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, J, Ramirez, G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Cravey, J P, Cummings, I, Danko, J, Napolitano, Q, He, H, Muramatsu, C S, Park, E H, Thorndike, T E, Coan, Y S, Gao, F, Liu, and R, Stroynowski
Abstract: We use data collected by the CLEO III detector at the Cornell Electron Storage Ring to measure the inclusive yields of D(s) mesons as B(Y(5S) --D(s)X) = (44-7 +/- 4.2 +/- 9.9)% and B(Y(4S) --D(s)X) = (18.1 +/- 0.5 +/- 2.8)%. From these measurements, we make a model dependent estimate of the ratio of B(s)*B(s)* to the total bb quark pair production of (16.0 +/- 2.6 +/- 5.8)% at the Y(5S) energy.
Published: 2005

39. Observation of psi(3770) --pi pi J/psi and measurement of Gamma ee[psi(2S)]

Author: N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, R S, Galik, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, T, Wilksen, K M, Weaver, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, E J, White, J, Williams, J, Wiss, D M, Asner, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, H, Severini, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, J, Ramirez, G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Anderson, J P, Cummings, I, Danko, J, Napolitano, Q, He, H, Muramatsu, C S, Park, E H, Thorndike, T E, Coan, Y S, Gao, F, Liu, M, Artuso, C, Boulahouache, S, Blusk, J, Butt, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, M E, Watkins, and J L, Rosner
Abstract: We observe signals for the decays psi(3770) --XJ/psi from data acquired with the CLEO detector operating at the CESR e+ e- collider with square root of s = 3773 MeV. We measure the following branching fractions Beta(psi(3770) --XJ/psi and significances: (189 +/- 20 +/- 20) x 10(-5) (11.6sigma) for X = pi+ pi-, (80 +/- 25 +/- 16) x 10(-5) (3.4sigma) for X = pi0 pi0, and (87 +/- 33 +/- 22) x 10(-5) (3.5sigma) for X = eta, where the errors are statistical and systematic, respectively. The radiative return process e+ e- --gamma psi(2S) populates the same event sample and is used to measure Gamma ee[psi(2S)] = (2.54 +/- 0.03 +/- 0.11) keV.
Published: 2005

40. Observation of Thirteen New Exclusive Multibody Hadronic Decays of theψ(2S)

Author: P. Naik, G. P. Chen, C. Cawlfield, Z. Metreveli, H. Stoeck, James E Wiss, Werner Sun, R. A. Briere, Karl Berkelman, H. Muramatsu, A. H. Mahmood, G. Tatishvili, T. O. Meyer, M. Weinberger, K. M. Ecklund, T. K. Pedlar, Mats A Selen, M. R. Shepherd, Peter Onyisi, I. P.J. Shipsey, K. Y. Gao, R. Poling, Q. He, V. Pavlunin, D. Urner, E. H. Thorndike, James Mueller, Marina Artuso, Y. S. Gao, J. Williams, G. Bonvicini, G. S. Huang, T. E. Coan, S. Stroiney, Jonathan L. Rosner, J. P. Cummings, C. Sedlack, B. K. Heltsley, G. D. Gollin, A. Smith, W. Park, D. Cronin-Hennessy, I. Danko, F. Liu, M. E. Watkins, D. Z. Besson, D. L. Kreinick, A. J. Sadoff, T. Wilksen, R. Nandakumar, R. Ehrlich, E. A. Phillips, Juliet Ritchie Patterson, R. Gray, P. Rubin, N. E. Adam, D. M. Asner, Amiran Tomaradze, A. W. Scott, V. Savinov, Anders Ryd, H. Mendez, S. B. Athar, John Yelton, J. Hietala, Li Jingyuan, R. Sia, S. W. Gray, J. Kandaswamy, H. Mahlke-Krüger, J. Pivarski, O. Dorjkhaidav, J. Butt, Horst Severini, T. Skwarnicki, C. Boulahouache, V. E. Kuznetsov, K. M. Weaver, J. A. Ernst, L. Breva-Newell, Shuwang Li, D. L. Hartill, H. Schwarthoff, Sean A Dobbs, Peter K. Zweber, D. Peterson, K. W. Edwards, D. Riley, Xin Shi, Dong-Hyun Kim, N. Menaa, D. T. Gong, S. Blusk, J. P. Alexander, E. J. White, T. Klein, S. Mehrabyan, V. Crede, J. E. Duboscq, M. Dubrovin, S. A. Dytman, B. W. Lang, D. H. Miller, M. Cravey, Yuichi Kubota, K. K. Seth, J. Napolitano, C. S. Park, G. S. Adams, Sheldon Stone, L. Fields, S. E. Csorna, J. C. Wang, Paul Avery, B. Sanghi, K. Zhang, Alan D. Lopez, Hans J. Vogel, Junjie Chen, C. D. Jones, R. Mountain, V. Potlia, R. Redjimi, L. K. Gibbons, R. Patel, D. Hertz, Z. Li, K. Randrianarivony, J. E. Ramirez, Thomas Ferguson, N. Lowrey, D. Cinabro, B. Gittelman, D. G. Cassel, I. Karliner, B. I. Eisenstein, and W. Love
Subjects: Physics, Crystallography, Particle physics, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Omega
Abstract: Using data accumulated with the CLEO detector corresponding to an integrated luminosity of $\mathcal{L}=5.63\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ on the peak of the $\ensuremath{\psi}(2S)$ [$3.08\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\psi}(2S)$ decays] and $20.70\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ at $\sqrt{s}=3.67\text{ }\text{ }\mathrm{GeV}$, we report first measurements of the branching fractions for the following 13 decay modes of the $\ensuremath{\psi}(2S)$: $\ensuremath{\eta}3\ensuremath{\pi}$, ${\ensuremath{\eta}}^{\ensuremath{'}}3\ensuremath{\pi}$, $\ensuremath{\rho}{K}^{+}{K}^{\ensuremath{-}}$, ${K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, $2({K}^{+}{K}^{\ensuremath{-}})$, $2({K}^{+}{K}^{\ensuremath{-}}){\ensuremath{\pi}}^{0}$, $\ensuremath{\rho}p\overline{p}$, $p\overline{p}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$, $\ensuremath{\eta}p\overline{p}$, $p\overline{p}{K}^{+}{K}^{\ensuremath{-}}$, $\ensuremath{\Lambda}\overline{\ensuremath{\Lambda}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\Lambda}\overline{p}{K}^{+}$, and $\ensuremath{\Lambda}\overline{p}{K}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, and more precise measurements of 8 previously measured modes: $2({\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})$, $\ensuremath{\rho}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $2({\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}){\ensuremath{\pi}}^{0}$, $\ensuremath{\omega}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\omega}{K}^{+}{K}^{\ensuremath{-}}$, $\ensuremath{\phi}{K}^{+}{K}^{\ensuremath{-}}$, and $p\overline{p}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$. We also report new branching fraction measurements of $\ensuremath{\phi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and $\ensuremath{\omega}p\overline{p}$ and upper limits for $\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, $\ensuremath{\eta}{K}^{+}{K}^{\ensuremath{-}}$, and $\ensuremath{\phi}p\overline{p}$. Results are compared, where possible, with the corresponding $J/\ensuremath{\psi}$ branching ratios to provide new tests of the 12% rule.
Published: 2005

41. Search forD0−D¯0mixing in the Dalitz plot analysis ofD0→KS0π+π−

Author: C. Boulahouache, D. Urner, E. I. Shibata, N. Lowrey, S. Blusk, S. Mehrabyan, V. Potlia, R. Redjimi, James E Wiss, D. Cinabro, J. E. Duboscq, L. K. Gibbons, P. Rubin, R. Patel, D. Hertz, H. Mendez, B. Gittelman, R. Sia, S. B. Athar, Mats A Selen, J. Butt, G. Tatishvili, T. O. Meyer, R. Ehrlich, Ryszard Stroynowski, J. P. Cummings, B. K. Heltsley, Marina Artuso, D. Z. Besson, Z. Li, G. D. Gollin, H. Mahlke-Krüger, D. L. Hartill, S. P. Pappas, Peter K. Zweber, K. K. Gan, N. Menaa, C. D. Jones, E. H. Thorndike, James Mueller, J. Williams, G. Bonvicini, J. P. Alexander, M. E. Watkins, S. A. Dytman, W. Park, T. E. Coan, G. P. Chen, Alan D. Lopez, Juliet Ritchie Patterson, H. Stoeck, A. J. Weinstein, S. Stroiney, Hans J. Vogel, W. Love, Jonathan L. Rosner, Tomasz Skwarnicki, R. A. Briere, O. Dorjkhaidav, T. K. Pedlar, K. W. Edwards, N. E. Adam, H. N. Nelson, Junjie Chen, J. C. Wang, Daniel P Cronin-Hennessy, D. L. Kreinick, Sean A Dobbs, A. J. Sadoff, T. Wilksen, B. Sanghi, Z. Metreveli, V. Savinov, Li Jingyuan, R. Gray, John Yelton, Amiran Tomaradze, J. Pivarski, K. M. Ecklund, R. Mountain, Horst Severini, A. Smith, E. Dambasuren, C. S. Park, L. Fields, D. G. Cassel, I. Karliner, B. I. Eisenstein, B. W. Lang, Shuwang Li, D. Riley, K. Y. Gao, D. H. Miller, Y. S. Gao, M. Dubrovin, Peter Onyisi, Yuichi Kubota, S. W. Gray, J. Napolitano, R. Poling, Q. He, V. Pavlunin, G. S. Adams, J. E. Ramirez, Dong Hee Kim, M. Cravey, S. E. Csorna, Thomas Ferguson, K. Zhang, I. P.J. Shipsey, Werner Sun, F. Liu, D. M. Asner, Adolf Bornheim, C. Sedlack, V. Crede, N. Horwitz, H. Schwarthoff, P. Naik, Karl Berkelman, H. Muramatsu, L. Hsu, K. K. Seth, M. Weinberger, Anders Ryd, V. E. Kuznetsov, L. Breva-Newell, Sheldon Stone, T. Klein, Paul Avery, R. Nandakumar, J. Kandaswamy, J. A. Ernst, D. Peterson, D. T. Gong, C. Cawlfield, I. Danko, M. R. Shepherd, G. S. Huang, A. H. Mahmood, K. E. Arms, A. W. Scott, and M. Chasse
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Dalitz plot, Two-body problem, 01 natural sciences, Particle identification, Particle decay, 0103 physical sciences, Intermediate state, CP violation, Substructure, 010306 general physics
Abstract: The resonant substructure in ${D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays is described by a combination of ten quasi two-body intermediate states which include both $CP$-even and $CP$-odd eigenstates and one doubly Cabibbo suppressed channel. We present a formalism that connects the variation in ${D}^{0}$ decay time over the Dalitz plot with the mixing parameters, $x$ and $y$, that describe off-shell and on-shell ${D}^{0}\ensuremath{-}{\overline{D}}^{0}$ mixing. We analyze the CLEO II.V data sample and find the parameters $x$ and $y$ are consistent with zero. We limit $(\ensuremath{-}4.5lxl9.3)%$ and $(\ensuremath{-}6.4lyl3.6)%$ at the 95% confidence level.
Published: 2005

42. Study ofτDecays to Four-Hadron Final States with Kaons

Author: K. Y. Gao, R. Nandakumar, M. E. Watkins, S. P. Pappas, D. G. Cassel, Adolf Bornheim, D. L. Kreinick, C. Sedlack, N. Lowrey, A. J. Sadoff, T. Wilksen, C. D. Jones, G. Tatishvili, D. Cinabro, T. O. Meyer, K. K. Seth, D. Riley, V. Savinov, I. Karliner, M. Dubrovin, J. C. Wang, B. Gittelman, B. I. Eisenstein, James E Wiss, E. H. Thorndike, M. R. Shepherd, Li Jingyuan, I. P.J. Shipsey, G. S. Adams, J. P. Cummings, A. H. Mahmood, C. Cawlfield, S. Blusk, Yuichi Kubota, Mats A Selen, G. S. Huang, S. A. Dytman, D. Z. Besson, M. Weinberger, K. E. Arms, R. Ehrlich, S. E. Csorna, H. Schwarthoff, R. Mountain, C. J. Stepaniak, G. Bonvicini, L. Hsu, J. P. Alexander, K. M. Ecklund, Sheldon Stone, L. Breva-Newell, C. S. Park, A. W. Scott, Paul Avery, J. E. Ramirez, J. G. Thayer, J. E. Duboscq, K. K. Gan, F. Liu, I. Danko, L. Fields, D. M. Asner, W. Love, V. E. Kuznetsov, M. Cravey, C. Boulahouache, Y. S. Gao, Thomas Ferguson, John Yelton, B. K. Heltsley, S. W. Gray, J. Pivarski, G. D. Gollin, K. Zhang, V. Crede, M. Chasse, G. P. Chen, D. L. Hartill, Marina Artuso, Peter K. Zweber, J. Kandaswamy, N. Menaa, H. Stoeck, R. A. Briere, H. Mahlke-Krüger, R. Gray, R. S. Galik, Amiran Tomaradze, T. E. Coan, J. A. Ernst, S. Mehrabyan, A. J. Weinstein, S. Stroiney, Jonathan L. Rosner, Tomasz Skwarnicki, D. Peterson, T. Klein, D. T. Gong, T. K. Pedlar, James Mueller, J. Williams, O. Dorjkhaidav, D. Urner, E. I. Shibata, W. Park, Werner Sun, Daniel P Cronin-Hennessy, Sean A Dobbs, Z. Metreveli, J. Urheim, Alan D. Lopez, Hans J. Vogel, P. Rubin, R. Sia, J. Butt, K. W. Edwards, H. Mendez, S. B. Athar, A. Smith, B. Sanghi, J. B. Thayer, Dong-Hyun Kim, J. Napolitano, Peter Onyisi, R. Poling, V. Pavlunin, E. Dambasuren, Juliet Ritchie Patterson, N. E. Adam, B. W. Lang, D. H. Miller, Horst Severini, Ryszard Stroynowski, Shuwang Li, P. Naik, Z. Li, V. Potlia, R. Redjimi, Karl Berkelman, H. Muramatsu, L. K. Gibbons, R. Patel, D. Hertz, and Anders Ryd
Subjects: Physics, Semileptonic decay, Particle physics, Meson, Branching fraction, Hadron, FOS: Physical sciences, General Physics and Astronomy, Omega, Particle identification, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Crystallography, Cornell Electron Storage Ring, Lepton
Abstract: The tau decays to four hadrons have been studied with the CLEO III detector at the Cornell Electron Storage Ring (CESR) using (7.56 +- 0.15) fb^{-1} of data collected near the Y(4S) resonance. We present the first statistically significant measurements of B(tau- -> K- pi+pi- pi0 nu, excluding K^0) = (7.4 +- 0.8 +- 1.1) x 10^{-4} and B(tau--> K- K+ pi- pi0 nu) = (5.5 +- 1.4 +- 1.2) x 10^{-5}, including the first observation of the decay, tau- -> K- omega nu, with branching fraction (4.1 +- 0.6 +- 0.7) x 10^{-4}. We also publish the first upper limit for B(tau- -> K- K+ K- pi0 nu) < 4.8 (6.1) x 10^{-6} at 90% (95%) confidence level (C.L.)., 9 pages postscript, also available from http://www.lns.cornell.edu/public/CLNS/2004/, submitted to PRL
Published: 2005

43. Measurement of the branching fractions forJ/ψ→ℓ+ℓ−

Author: M. R. Shepherd, C. S. Park, S. Blusk, C. D. Jones, L. Fields, G. S. Huang, J. Kandaswamy, T. E. Coan, J. E. Duboscq, K. Zhang, S. Stroiney, N. Lowrey, Jonathan L. Rosner, E. H. Thorndike, G. Tatishvili, T. O. Meyer, D. Cinabro, L. Hsu, J. P. Alexander, R. Ehrlich, L. Breva-Newell, Dong Hee Kim, D. Peterson, B. Gittelman, S. W. Gray, Mats A Selen, C. Boulahouache, K. K. Seth, G. Bonvicini, H. Mahlke-Krüger, J. A. Ernst, R. Mountain, Werner Sun, K. W. Edwards, D. G. Cassel, Y. S. Gao, E. Dambasuren, D. T. Gong, James Mueller, R. Gray, J. P. Cummings, J. Williams, G. P. Chen, V. Potlia, M. Cravey, B. Sanghi, R. Redjimi, B. W. Lang, H. Stoeck, R. A. Briere, W. Park, Amiran Tomaradze, R. S. Galik, C. Sedlack, M. Chasse, Brian Heltsley, D. H. Miller, Sheldon Stone, Alan D. Lopez, L. K. Gibbons, James E Wiss, D. Z. Besson, K. Y. Gao, C. Cawlfield, Paul Avery, Hans J. Vogel, Z. Metreveli, S. Mehrabyan, J. C. Wang, John Yelton, R. Patel, D. Hertz, M. Weinberger, T. Skwarnicki, Junjie Chen, J. Pivarski, Marina Artuso, T. K. Pedlar, A. W. Scott, D. L. Hartill, V. Crede, O. Dorjkhaidav, G. S. Adams, Peter K. Zweber, I. Karliner, H. Mendez, S. E. Csorna, N. Menaa, S. B. Athar, Sean A Dobbs, M. E. Watkins, D. Urner, E. I. Shibata, A. H. Mahmood, J. E. Ramirez, A. J.S. Smith, B. I. Eisenstein, S. A. Dytman, Z. Li, D. Riley, W. Love, D. Cronin-Hennessy, M. Dubrovin, I. P.J. Shipsey, V. E. Kuznetsov, I. Danko, R. Nandakumar, Thomas Ferguson, P. Naik, Yuichi Kubota, Karl Berkelman, F. Liu, H. Muramatsu, D. M. Asner, T. Klein, George D Gollin, K. M. Ecklund, Juliet Ritchie Patterson, N. E. Adam, D. L. Kreinick, A. J. Sadoff, T. Wilksen, Horst Severini, Shuwang Li, Peter Onyisi, R. Poling, Q. He, V. Pavlunin, V. Savinov, Li Jingyuan, E. A. Phillips, P. Rubin, R. Sia, J. Butt, J. Napolitano, A. Ryd, and H. Schwarthoff
Subjects: Physics, Nuclear and High Energy Physics, Particle decay, Particle physics, Branching fraction, Electron–positron annihilation, Quarkonium, Particle identification
Abstract: We present measurements of the branching fractions for $J/\ensuremath{\psi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}$ and ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ using 3M $\ensuremath{\psi}(2S)$ decays collected with the CLEO detector operating at the CESR ${e}^{+}{e}^{\ensuremath{-}}$ collider. We obtain $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}})=(5.945\ifmmode\pm\else\textpm\fi{}0.067\ifmmode\pm\else\textpm\fi{}0.042)%$ and $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})=(5.960\ifmmode\pm\else\textpm\fi{}0.065\ifmmode\pm\else\textpm\fi{}0.050)%$, leading to an average of $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}})=(5.953\ifmmode\pm\else\textpm\fi{}0.056\ifmmode\pm\else\textpm\fi{}0.042)%$ and a ratio of $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}})/\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}})=(99.7\ifmmode\pm\else\textpm\fi{}1.2\ifmmode\pm\else\textpm\fi{}0.6)%$, all consistent with, but more precise than, previous measurements.
Published: 2005

44. Observation of the hc(1P1) state of charmonium

Author: J L, Rosner, N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, R S, Galik, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, T, Wilksen, K M, Weaver, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, E J, White, J, Williams, J, Wiss, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, A H, Mahmood, H, Severini, D M, Asner, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, J, Ramirez, G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Cravey, J P, Cummings, I, Danko, J, Napolitano, Q, He, H, Muramatsu, C S, Park, W, Park, E H, Thorndike, T E, Coan, Y S, Gao, F, Liu, M, Artuso, C, Boulahouache, S, Blusk, J, Butt, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, and M E, Watkins
Abstract: The h(c)((1)P(1)) state of charmonium has been observed in the reaction psi(2S) --pi(0)h(c) --(gammagamma)(gammaeta(c)) using 3.08 x10(6) psi(2S) decays recorded in the CLEO detector. Data have been analyzed both for the inclusive reaction, where the decay products of the eta(c) are not identified, and for exclusive reactions, in which eta(c) decays are reconstructed in seven hadronic decay channels. We find M(h(c)) = 3524.4 +/- 0.6 +/- 0.4 MeV which corresponds to a hyperfine splitting DeltaM(hf)(1P) triple-bondM((3)P(J)) - M((1)P(1)) = +1.0 +/- 0.6 +/- 0.4 MeV, and B(psi(2S) --pi(0)h(c)) x B(h(c) --gammaeta(c)) = (4.0 +/- 0.8 +/- 0.7) x 10(-4).
Published: 2005

45. Improved Measurement of the Form Factors in the DecayΛc+→Λe+νe

Author: E. H. Thorndike, G. P. Chen, G. Bonvicini, H. Stoeck, R. A. Briere, R. S. Galik, M. Weinberger, G. Tatishvili, T. O. Meyer, N. B. Mistry, R. Mountain, V. Potlia, B. K. Heltsley, E. Lipeles, L. K. Gibbons, V. V. Frolov, J. J. Thaler, Y. S. Gao, G. D. Gollin, J. W. Hinson, N. Lowrey, I. Danko, T. K. Pedlar, L. Jian, Adolf Bornheim, C. Sedlack, J. Kandaswamy, D. Cinabro, B. Gittelman, Marina Artuso, C. Gwon, J. G. Thayer, M. E. Watkins, H. Muramatsu, J. A. Ernst, H. Schwarthoff, M. S. Alam, S. P. Pappas, O. Dorjkhaidav, D. Z. Besson, E. Eckhart, D. Peterson, D. G. Cassel, S. B. Athar, John Yelton, Daniel P Cronin-Hennessy, S. J. Richichi, D. Riley, Karl Berkelman, P. Skubic, K. M. Ecklund, D. T. Gong, M. Saleem, J. Pivarski, H. Kagan, R. Nandakumar, S. Blusk, M. Dubrovin, C. Cawlfield, I. Karliner, K. K. Gan, J. E. Duboscq, B. I. Eisenstein, J. Urheim, S. Nam, Z. Metreveli, J. C. Wang, S. A. Dytman, Yuichi Kubota, E. von Toerne, R. Rangarajan, W. M. Sun, D. L. Kreinick, A. J. Sadoff, T. Wilksen, Ryszard Stroynowski, Hans J. Vogel, K. E. Arms, Mats A Selen, E. Dambasuren, V. Savinov, D. Urner, E. I. Shibata, D. L. Hartill, C. Plager, S. Anderson, Peter K. Zweber, Thomas Ferguson, A. Smith, James Mueller, K. K. Seth, J. Williams, S. W. Gray, I. P.J. Shipsey, C. S. Park, A. Magerkurth, Sheldon Stone, W. Park, Paul Avery, D. H. Miller, A. Shapiro, F. R. Wappler, S. Ahmed, R. Ehrlich, J. P. Alexander, F. Liu, C. Boulahouache, S. McGee, H. Mahlke-Krüger, R. D. Kass, T. E. Coan, Jason Sang Hun Lee, A. J. Weinstein, K. Benslama, Andreas Warburton, V. Boisvert, S. E. Csorna, Amiran Tomaradze, K. W. Edwards, B. Sanghi, T. Skwarnicki, J. B. Thayer, C. D. Jones, C. J. Stepaniak, M. R. Shepherd, G. S. Huang, L. Hsu, L. Breva-Newell, K. Honscheid, Juliet Ritchie Patterson, N. E. Adam, Horst Severini, Shuwang Li, R. Poling, and V. Pavlunin
Subjects: Physics, Semileptonic decay, Particle physics, Meson, Hadron, General Physics and Astronomy, Lambda, Charmed baryons, Particle decay, CP violation, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Cornell Electron Storage Ring, Nuclear Experiment
Abstract: Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay lambda(+)(c)lambda--> e(+)nu(e). By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R= f(2)/f(1) = -0.31 +/- 0.05(stat) +/- 0.04(syst), the pole mass, M(pole) = [2.21 +/- 0.08(stat) +/- 0.14(syst)] GeV/c(2), and the decay asymmetry parameter of the lambda(+)(c), alpha (lambda(c)) = -0.86 +/-0.03(stat) +/- 0.02(syst), for q(2) = 0.67 (GeV/c(2))(2). We compare the angular distributions of the lambda(+)(c) and lambda(-)(c) and find no evidence for CP violation: A(lambda(c)) = (alpha(lambda(c)) + alpha (lambda(c)))/(alpha(lambda(c))-alpha(lambda(c))) = 0.00 +/- 0.03(stat) +/- 0.01(syst) +/- 0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, A(lambda), for ppi(-).
Published: 2005

46. Search forη(1475)→KS0K±π∓in two-photon fusion at the CLEO detector at Cornell

Author: D. G. Cassel, G. Tatishvili, T. O. Meyer, C. S. Park, S. Mehrabyan, L. Fields, P. Rubin, E. Dambasuren, R. Sia, J. Kandaswamy, Jing Wang, J. P. Cummings, J. Butt, I. Karliner, B. W. Lang, J. A. Ernst, D. Z. Besson, James Mueller, D. H. Miller, J. Williams, N. Lowrey, D. Cinabro, V. Crede, Ryszard Stroynowski, D. Peterson, K. W. Edwards, B. I. Eisenstein, B. Gittelman, B. K. Heltsley, D. T. Gong, W. Park, G. D. Gollin, K. K. Seth, D. Riley, R. Ehrlich, B. Sanghi, J. B. Thayer, Z. Li, D. L. Kreinick, D. Cronin-Hennessy, S. Blusk, A. J. Sadoff, T. Wilksen, G. S. Adams, T. K. Pedlar, I. Danko, Marina Artuso, M. Dubrovin, Sheldon Stone, Mats A Selen, J. E. Duboscq, H. Mahlke-Krüger, S. E. Csorna, R. Mountain, Paul Avery, V. Potlia, R. Redjimi, J. Napolitano, I. P.J. Shipsey, D. Urner, E. I. Shibata, T. E. Coan, V. Savinov, R. Nandakumar, A. J. Weinstein, D. L. Hartill, S. Stroiney, L. K. Gibbons, Li Jingyuan, Jonathan L. Rosner, Tomasz Skwarnicki, Z. Metreveli, A. W. Scott, P. Naik, Yuichi Kubota, Peter K. Zweber, K. K. Gan, R. Patel, D. Hertz, E. H. Thorndike, W. Love, K. Zhang, H. Mendez, H. Schwarthoff, S. B. Athar, Karl Berkelman, H. Muramatsu, C. Cawlfield, N. Menaa, G. Bonvicini, Peter Onyisi, K. Y. Gao, M. Cravey, F. Liu, D. M. Asner, A. Smith, J. P. Alexander, K. M. Ecklund, C. Sedlack, Dong-Hyun Kim, C. D. Jones, J. E. Ramirez, Anders Ryd, A. H. Mahmood, O. Dorjkhaidav, R. Poling, S. A. Dytman, S. P. Pappas, M. E. Watkins, A. Bornheim, C. Boulahouache, M. Weinberger, R. S. Galik, Sean A Dobbs, K. E. Arms, Thomas Ferguson, V. Pavlunin, Alan D. Lopez, John Yelton, Hans J. Vogel, J. G. Thayer, Y. S. Gao, J. Pivarski, R. Ahohe, Juliet Ritchie Patterson, N. E. Adam, S. W. Gray, Horst Severini, Shuwang Li, G. P. Chen, R. Gray, Amiran Tomaradze, H. Stoeck, R. A. Briere, C. J. Stepaniak, L. Hsu, L. Breva-Newell, M. Chasse, James E Wiss, M. R. Shepherd, G. S. Huang, V. E. Kuznetsov, T. Klein, and Werner Sun
Subjects: Pseudoscalar, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, CLEO, Hadron, Dalitz plot, Invariant mass, Particle identification
Abstract: We analyze $13.8\text{ }\text{ }\mathrm{f}{\mathrm{b}}^{\ensuremath{-}1}$ of the integrated ${e}^{+}{e}^{\ensuremath{-}}$ luminosity collected at 10.6 GeV center-of-mass energy with the CLEO II and CLEO II.V detectors to study exclusive two-photon production of hadrons with masses below $1.7\text{ }\text{ }\mathrm{GeV}/{\mathrm{c}}^{2}$ decaying into the ${K}_{S}^{0}{K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ final state. We observe two statistically significant enhancements in the $\ensuremath{\eta}(1475)$ mass region. These enhancements have large transverse momentum which rules them out as being due to pseudoscalar resonances but is consistent with the production of axial-vector mesons. We use tagged two-photon events to study the properties of the observed enhancements and associate them with the production of ${f}_{1}(1285)$ and ${f}_{1}(1420)$. Our nonobservation of $\ensuremath{\eta}(1475)$ is inconsistent by more than 2 standard deviations with the first observation of this resonance in two-photon collisions by the L3 experiment. We present our estimates for 90% confidence level upper limits on the products of two-photon partial widths of light pseudoscalar hadrons and their branching fractions into ${K}_{S}^{0}({\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}){K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$.
Published: 2005

47. Measurement of absolute hadronic branching fractions of D mesons and e+e- --DD cross sections at Ec.m.=3773 MeV

Author: Q, He, H, Muramatsu, C S, Park, W, Park, E H, Thorndike, T E, Coan, Y S, Gao, F, Liu, M, Artuso, C, Boulahouache, S, Blusk, J, Butt, E, Dambasuren, O, Dorjkhaidav, J, Li, N, Menaa, R, Mountain, R, Nandakumar, K, Randrianarivony, R, Redjimi, R, Sia, T, Skwarnicki, S, Stone, J C, Wang, K, Zhang, S E, Csorna, G, Bonvicini, D, Cinabro, M, Dubrovin, R A, Briere, G P, Chen, J, Chen, T, Ferguson, G, Tatishvili, H, Vogel, M E, Watkins, J L, Rosner, N E, Adam, J P, Alexander, K, Berkelman, D G, Cassel, V, Crede, J E, Duboscq, K M, Ecklund, R, Ehrlich, L, Fields, L, Gibbons, B, Gittelman, R, Gray, S W, Gray, D L, Hartill, B K, Heltsley, D, Hertz, L, Hsu, C D, Jones, J, Kandaswamy, D L, Kreinick, V E, Kuznetsov, H, Mahlke-Krüger, T O, Meyer, P U E, Onyisi, J R, Patterson, D, Peterson, E A, Phillips, J, Pivarski, D, Riley, A, Ryd, A J, Sadoff, H, Schwarthoff, X, Shi, M R, Shepherd, S, Stroiney, W M, Sun, D, Urner, K M, Weaver, T, Wilksen, M, Weinberger, S B, Athar, P, Avery, L, Breva-Newell, R, Patel, V, Potlia, H, Stoeck, J, Yelton, P, Rubin, C, Cawlfield, B I, Eisenstein, G D, Gollin, I, Karliner, D, Kim, N, Lowrey, P, Naik, C, Sedlack, M, Selen, J, Williams, J, Wiss, K W, Edwards, D, Besson, T K, Pedlar, D, Cronin-Hennessy, K Y, Gao, D T, Gong, J, Hietala, Y, Kubota, T, Klein, B W, Lang, S Z, Li, R, Poling, A W, Scott, A, Smith, S, Dobbs, Z, Metreveli, K K, Seth, A, Tomaradze, P, Zweber, J, Ernst, A H, Mahmood, H, Severini, D M, Asner, S A, Dytman, W, Love, S, Mehrabyan, J A, Mueller, V, Savinov, Z, Li, A, Lopez, H, Mendez, J, Ramirez, G S, Huang, D H, Miller, V, Pavlunin, B, Sanghi, I P J, Shipsey, G S, Adams, M, Chasse, M, Cravey, J P, Cummings, I, Danko, and J, Napolitano
Abstract: Using 55.8 pb(-1) of e+e- collisions recorded at the psi(3770) resonance with the CLEO-c detector at CESR, we determine absolute hadronic branching fractions of charged and neutral D mesons using a double tag technique. Among measurements for three D0 and six D+ modes, we obtain reference branching fractions B(D0--K-pi+)=(3.91+/-0.08+/-0.09)% and B(D+--K-pi+pi+)=(9.5+/-0.2+/-0.3)%, where the uncertainties are statistical and systematic, respectively. Final state radiation is included in these branching fractions by allowing for additional, unobserved, photons in the final state. Using a determination of the integrated luminosity, we also extract the cross sections sigma(e+e- --D0D0)=(3.60+/-0.07(+0.07)(-0.05)) nb and sigma(e+e- --D+D-)=(2.79+/-0.07(+0.10)(-0.04)) nb.
Published: 2005

48. New measurement of the masses and widths of theΣc++andΣc0charmed baryons

Author: E. Dambasuren, Jing Wang, V. Potlia, R. Redjimi, Y. S. Gao, L. K. Gibbons, V. Crede, R. Mountain, R. Patel, D. Hertz, T. E. Coan, A. J. Weinstein, J. J. Thaler, S. Stroiney, C. Boulahouache, R. Gray, J. E. Ramirez, Thomas Ferguson, Jonathan L. Rosner, Tomasz Skwarnicki, Amiran Tomaradze, C. Cawlfield, N. Lowrey, D. Cinabro, G. P. Chen, G. Tatishvili, T. O. Meyer, B. Gittelman, D. G. Cassel, H. Stoeck, R. A. Briere, H. Muramatsu, I. Danko, K. Y. Gao, T. K. Pedlar, C. J. Stepaniak, S. Mehrabyan, I. P.J. Shipsey, Alan D. Lopez, Hans J. Vogel, K. K. Seth, C. Sedlack, Z. Metreveli, J. P. Cummings, I. Karliner, J. Napolitano, B. I. Eisenstein, B. W. Lang, M. E. Watkins, K. K. Gan, B. K. Heltsley, Sheldon Stone, G. D. Gollin, D. Z. Besson, D. H. Miller, Paul Avery, O. Dorjkhaidav, W. Love, A. Bornheim, E. H. Thorndike, A. Smith, Z. Li, M. Cravey, F. Liu, P. Naik, H. Schwarthoff, D. Urner, D. M. Asner, P. Rubin, R. Sia, E. I. Shibata, C. D. Jones, J. Butt, C. S. Park, G. Bonvicini, J. P. Alexander, Peter Onyisi, Daniel P Cronin-Hennessy, Karl Berkelman, Sean A Dobbs, K. Zhang, J. Kandaswamy, H. Mendez, S. B. Athar, L. Fields, S. P. Pappas, J. A. Ernst, K. M. Ecklund, R. Poling, V. Pavlunin, S. W. Gray, D. Peterson, James Mueller, Dong-Hyun Kim, J. Williams, D. T. Gong, G. S. Adams, R. S. Galik, D. L. Kreinick, S. E. Csorna, A. H. Mahmood, W. Park, A. J. Sadoff, T. Wilksen, S. A. Dytman, Juliet Ritchie Patterson, N. E. Adam, D. Riley, K. E. Arms, S. Blusk, V. Savinov, R. Ehrlich, Anders Ryd, J. E. Duboscq, Horst Severini, M. Dubrovin, H. Mahlke-Krüger, Shuwang Li, Yuichi Kubota, Marina Artuso, M. Weinberger, V. E. Kuznetsov, J. G. Thayer, Werner Sun, M. Chasse, James E Wiss, M. R. Shepherd, G. S. Huang, B. Sanghi, L. Hsu, J. B. Thayer, L. Breva-Newell, K. W. Edwards, A. W. Scott, Mats A Selen, D. L. Hartill, Peter K. Zweber, N. Menaa, John Yelton, J. Pivarski, and R. Nandakumar
Subjects: Charmed baryons, Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, Cornell Electron Storage Ring, Particle identification, Sigma baryon
Abstract: Using data recorded by the CLEO III detector at the Cornell electron storage ring (CESR), we have made measurements of some properties of the ${\ensuremath{\Sigma}}_{c}^{*++}$ and ${\ensuremath{\Sigma}}_{c}^{*0}$ charmed baryons. In particular: $\ensuremath{\Gamma}({\ensuremath{\Sigma}}_{c}^{*++})={14.4}_{\ensuremath{-}1.5}^{+1.6}\ifmmode\pm\else\textpm\fi{}1.4\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}$, $M({\ensuremath{\Sigma}}_{c}^{*++})\ensuremath{-}M({\ensuremath{\Lambda}}_{c}^{+})=231.5\ifmmode\pm\else\textpm\fi{}0.4\ifmmode\pm\else\textpm\fi{}0.3\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}$, $\ensuremath{\Gamma}({\ensuremath{\Sigma}}_{c}^{*0})={16.6}_{\ensuremath{-}1.7}^{+1.9}\ifmmode\pm\else\textpm\fi{}1.4\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}$,$M({\ensuremath{\Sigma}}_{c}^{*0})\ensuremath{-}M({\ensuremath{\Lambda}}_{c}^{+})=231.4\ifmmode\pm\else\textpm\fi{}0.5\ifmmode\pm\else\textpm\fi{}0.3\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}$.
Published: 2005

49. Search forX(3872)inγγFusion and Radiative Production at CLEO

Author: D. Riley, R. Nandakumar, D. L. Kreinick, M. Dubrovin, E. Dambasuren, J. Napolitano, J. J. Thaler, A. J. Sadoff, T. Wilksen, B. W. Lang, D. H. Miller, G. Tatishvili, T. O. Meyer, Anders Ryd, Yuichi Kubota, I. Danko, Adolf Bornheim, D. G. Cassel, C. Sedlack, V. Savinov, Werner Sun, J. P. Cummings, C. D. Jones, S. P. Pappas, H. Schwarthoff, A. W. Scott, I. Karliner, D. Z. Besson, Juliet Ritchie Patterson, P. Rubin, J. C. Wang, R. Sia, S. Blusk, N. E. Adam, B. I. Eisenstein, J. Butt, K. Zhang, C. Cawlfield, Dong Hee Kim, J. E. Duboscq, I. P.J. Shipsey, H. Mendez, S. B. Athar, Horst Severini, R. Gray, K. M. Ecklund, J. E. Ramirez, B. Sanghi, John Yelton, A. H. Mahmood, K. W. Edwards, J. Pivarski, Amiran Tomaradze, J. B. Thayer, P. Naik, Thomas Ferguson, M. Weinberger, Shuwang Li, D. L. Hartill, Karl Berkelman, K. Y. Gao, J. Kandaswamy, N. Lowrey, A. Smith, V. E. Kuznetsov, R. Mountain, O. Dorjkhaidav, Peter K. Zweber, D. Cinabro, B. K. Heltsley, M. Cravey, Peter Onyisi, Alan D. Lopez, B. Gittelman, James Mueller, G. D. Gollin, Hans J. Vogel, J. Williams, N. Menaa, James E Wiss, J. A. Ernst, Daniel P Cronin-Hennessy, Sean A Dobbs, Y. S. Gao, C. J. Stepaniak, J. G. Thayer, M. E. Watkins, G. S. Adams, K. K. Seth, D. Peterson, F. Liu, W. Park, R. Poling, W. Love, D. M. Asner, Z. Metreveli, Mats A Selen, V. Pavlunin, D. T. Gong, S. E. Csorna, Sheldon Stone, Paul Avery, R. Ehrlich, V. Crede, H. Mahlke-Krüger, C. S. Park, L. Fields, E. H. Thorndike, G. Bonvicini, J. P. Alexander, T. E. Coan, A. J. Weinstein, S. Stroiney, Jonathan L. Rosner, Tomasz Skwarnicki, S. W. Gray, R. S. Galik, M. R. Shepherd, G. S. Huang, L. Hsu, T. K. Pedlar, L. Breva-Newell, M. Chasse, Z. Li, S. A. Dytman, V. Potlia, R. Redjimi, G. P. Chen, L. K. Gibbons, H. Stoeck, R. Patel, R. A. Briere, D. Hertz, Marina Artuso, C. Boulahouache, H. Muramatsu, S. Mehrabyan, D. Urner, and E. I. Shibata
Subjects: Physics, Nuclear physics, Annihilation, Pi, Radiative transfer, General Physics and Astronomy, Production (computer science), State (functional analysis), Radiation, X(3872), Lepton
Abstract: We report on a search for the recently reported X(3872) state using 15.1 fb(-1) of e(+)e(-) data taken in the sqrt[s] = 9.46-11.30 GeV region. Separate searches for the production of the X(3872) in untagged gammagamma fusion and e(+)e(-) annihilation following initial state radiation are made by taking advantage of the unique angular correlation between the leptons from the decay J/psi --> l(+)l(-) in X(3872) decay to pi(+)pi(-)J/psi. No signals are observed in either case, and 90% confidence upper limits are established as (2J+1)Gamma(gammagamma)(X(3872))B(X --> pi(+)pi(-)J/psi) pi(+)pi(-)J/psi) < 8.3 eV.
Published: 2005

50. Photon Transitions inΥ(2S)andΥ(3S)Decays

Author: M. Artuso, C. Boulahouache, S. Blusk, J. Butt, E. Dambasuren, O. Dorjkhaidav, J. Li, N. Menaa, R. Mountain, H. Muramatsu, R. Nandakumar, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Bornheim, S. P. Pappas, A. J. Weinstein, J. L. Rosner, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, V. Crede, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, B. Gittelman, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, T. O. Meyer, P. U. E. Onyisi, J. R. Patterson, D. Peterson, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, S. Stroiney, W. M. Sun, J. G. Thayer, D. Urner, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, G. D. Gollin, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, J. Wiss, K. W. Edwards, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, Y. Kubota, B. W. Lang, S. Z. Li, R. Poling, A. W. Scott, A. Smith, C. J. Stepaniak, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, A. H. Mahmood, K. Arms, K. K. Gan, H. Severini, D. M. Asner, S. A. Dytman, W. Love, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, E. I. Shibata, I. P. J. Shipsey, G. S. Adams, M. Chasse, M. Cravey, J. P. Cummings, I. Danko, J. Napolitano, C. S. Park, W. Park, J. B. Thayer, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, and R. Stroynowski
Subjects: Physics, Particle physics, Dipole, Photon, General Physics and Astronomy, High Energy Physics::Experiment, Photon spectra, Magnetic dipole
Abstract: We have studied the inclusive photon spectra in Upsilon(2S) and \Upsilon(3S) decays using a large statistics data sample obtained with the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon transition rates and photon energies for Upsilon(2S)->gamma chi_bJ(1P) and Upsilon(3S)->gamma chi_bJ(2P) J=0,1,2. We measure the rate for a rare E1 transition Upsilon(3S)->gamma chi_b0(1P) for the first time. We also set upper limits on the rates for the hindered magnetic dipole (M1) transitions to the eta_b(1S) and eta_b(2S) states.
Published: 2005

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