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56 results on '"Xiao, Hai"'

8. Study on possible molecular states composed of ΛcD¯ ( ΛbB ) and ΣcD¯ ( ΣbB ) within the Bethe-Salpeter framework

Author

Xiao-Hai Liu, Mei Li, Hong-Wei Ke, and Xue-Qian Li

Subjects
Physics, Particle physics, Bethe–Salpeter equation, 010308 nuclear & particles physics, Sigma, State (functional analysis), 01 natural sciences, Pentaquark, Isospin, 0103 physical sciences, Bound state, Production (computer science), 010306 general physics, Bar (unit)
Abstract

$P_c(4312)$ observed by the LHCb collaboration is confirmed as a pentaquark and its structure, production, and decay behaviors attract great attention from theorists and experimentalists. Since its mass is very close to sum of $\Sigma_c$ and $\bar D$ masses, it is naturally tempted to be considered as a molecular state composed of $\Sigma_c$ and $\bar D$. Moreover, $P_c(4312)$ is observed in the channel with $J/\psi p$ final state, requiring that isospin conservation $P_c(4312)$ is an isospin-1/2 eigenstate. In literature, several groups used various models to estimate its spectrum. We systematically study the pentaquarks within the framework of the Bethe-Salpeter equation; thus $P_c(4312)$ is an excellent target because of the available data. We calculate the spectrum of $P_c(4312)$ in terms of the Bethe-Salpter equations and further study its decay modes. Some predictions on other possible pentaquark states that can be tested in future experiments are made.

Published
2020

11. Visible narrow cusp structure in Λc+→pK−π+ enhanced by triangle singularity

Author

Gang Li, Ju-Jun Xie, Qiang Zhao, and Xiao-Hai Liu

Subjects
Cusp (singularity), Physics, 010308 nuclear & particles physics, Quark model, State (functional analysis), Lambda, 01 natural sciences, Scattering amplitude, Singularity, 0103 physical sciences, Mass spectrum, Invariant mass, Atomic physics, 010306 general physics
Abstract

A resonance-like structure as narrow as 10 MeV is observed in the ${K}^{\ensuremath{-}}p$ invariant mass distributions in ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}\ensuremath{\rightarrow}p{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ at Belle. Based on the large data sample of about 1.5 million events and the small bin width of just 1 MeV for the ${K}^{\ensuremath{-}}p$ invariant mass spectrum, the narrow peak is found precisely lying at the $\mathrm{\ensuremath{\Lambda}}\ensuremath{\eta}$ threshold. While lacking evidence for a quark model state with such a narrow width at this mass region, we find that this narrow structure can be naturally identified as a threshold cusp but enhanced by the nearby triangle singularity via the $\mathrm{\ensuremath{\Lambda}}\text{\ensuremath{-}}{a}_{0}(980{)}^{+}$ or $\ensuremath{\eta}\text{\ensuremath{-}}\mathrm{\ensuremath{\Sigma}}(1660{)}^{+}$ rescatterings.

Published
2019

14. Searching for charmoniumlike states with hiddenss¯

Author

Xiao-Hai Liu and Makoto Oka

Subjects
Physics, Scattering amplitude, Particle physics, Meson, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences, Omega, Nuclear theory, Kinematic singularities
Abstract

We investigate the processes ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\gamma}J/\ensuremath{\psi}\ensuremath{\phi}$, $\ensuremath{\gamma}J/\ensuremath{\psi}\ensuremath{\omega}$, and ${\ensuremath{\pi}}^{0}J/\ensuremath{\psi}\ensuremath{\eta}$ to search for the charmoniumlike states with hidden $s\overline{s}$, such as $Y(4140)$, $Y(4274)$, $X(4350)$, and $X(3915)$. These processes receive contributions from the charmed-strange meson rescatterings. When the center-of-mass energies of ${e}^{+}{e}^{\ensuremath{-}}$ scatterings are taken around the ${D}_{s0}(2317){D}_{s}^{*}$, ${D}_{s1}(2460){D}_{s}$, or ${D}_{s1}(2460){D}_{s}^{*}$ threshold, the anomalous triangle singularities can be present in the rescattering amplitudes, which implies a nonresonance explanation about the resonancelike structures. The positions of the anomalous triangle singularities are sensitive to the kinematics, which offers us a criterion to distinguish the kinematic singularities from genuine particles.

Published
2016

15. Search forZc(3900)±→ωπ±

Author

S. Marcello, Y. Zeng, Zhe Sun, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, G. R. Liao, Y. F. Wang, G. S. Huang, Dan Wang, H. H. Liu, Z. Ning, J. Z. Bai, I. Tapan, Y. H. Yan, Y. J. Mo, T. Hussain, X. Y. Ma, C. Hu, L. D. Liu, X. K. Chu, X. Tang, Y. H. Zheng, S. Schumann, Cong-Feng Qiao, J. C. Li, J. Zhuang, I. B. Nikolaev, X. Q. Hao, Shan Wang, J. Min, H. J. Lu, W. X. Gong, J. W. Zhao, J. G. Lu, Xiao-Rui Lyu, Yao Wang, O. Albayrak, J. H. Yin, X. K. Zhou, Magnus Wolke, M. X. Luo, Jian Wei, D. V. Dedovich, H. B. Liu, Y. C. Zhu, N. Yu. Muchnoi, M. Shao, Y. T. Gu, Y. F. Liang, X. P. Xu, X. B. Ji, M. Tiemens, F. E. Maas, T. Hu, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, Peilian Liu, P. Patteri, D. P. Jin, Xiao-Hai Liu, B. Kopf, H. S. Chen, C. H. Li, X. L. Li, S. L. Olsen, Lingxuan Zhang, G. S. Varner, T. Held, Y. X. Yang, L. H. Wu, P. Larin, R. Kliemt, Li Zhou, J. S. Huang, D. W. Bennett, Zujian Wang, Y. P. Guo, P. Kiese, E. Fioravanti, M. Savrie, C. X. Liu, Z. Y. Wang, Jie Yu, D. J. Ambrose, A. Hafner, Q. Zhao, Y. Z. Sun, L. Zotti, Q. P. Ji, Yaquan Fang, M. Greco, R. A. Briere, L. L. Jiang, Serkant Ali Cetin, E. H. Thorndike, K. L. He, X. Fang, G. A. Chelkov, F. Feldbauer, I. R. Boyko, X. S. Jiang, T. J. Min, K. J. Zhu, Cen Zhang, X. H. Liu, L. Q. Qin, Guangming Huang, X. L. Kang, Feng Liu, Xichao Ruan, P. X. Shen, M. Albrecht, X. Y. Gao, A. Sarantsev, D. H. Wei, P. R. Li, S. W. Han, M. Maggiora, Ling Zhao, Liqing Xu, P. L. Wang, S. H. Zhang, X. Y. Shen, K. Schoenning, B. S. Zou, Z. Wu, M. Ablikim, W. D. Li, Huan Ren, V. Santoro, A. Calcaterra, Z. G. Zhao, J. S. Lange, J. B. Jiao, X. L. Ji, X. Y. Jiang, J. P. Dai, Lei Zhao, Z. Y. He, Z. L. Hou, G. Cibinetto, Ke Wang, L. W. Jiang, G. F. Xu, Y. Ding, Q. W. Zhao, Zhiqing Liu, Y. N. Pu, X. C. Chen, N. Qin, M. H. Ye, S. Jin, Jimin Zhao, B. J. Liu, T. Johansson, Zhiqing Zhang, M. H. Gu, C. Z. Yuan, J. F. Chang, Y. B. Zhao, Z. Y. Zhang, O. Cakir, H. Liang, Gang Zhao, Manuel Lara, H. Y. Sheng, G. Li, W. Shan, C. Geng, O. B. Kolcu, H. H. Zhang, R. Poling, P. F. Duan, W. Kühn, J. Dong, X. Cai, Jie Zhao, D. X. Lin, X. N. Ma, X. Y. Song, K. Moriya, Fenfen An, C. Leng, F. A. Harris, Alexey Zhemchugov, H. M. Hu, Z. A. Zhu, Z. J. Sun, H. Loehner, B. L. Wang, L. Y. Dong, Y. G. Xie, A. Zallo, C. X. Yu, F. H. Liu, C. F. Redmer, C. D. Fu, R. Q. Lu, S. Nisar, Z. P. Zhang, I. Uman, Z. Gao, S. L. Niu, T. C. Zhao, C. Q. Feng, X. R. Chen, C. J. Tang, K. Goetzen, Y. Hu, B. Wang, M. Qi, S. Qian, Q. An, Jialun Ping, H. J. Yang, Y. P. Lu, Jiaxi Liu, F. Li, J. W. Zhang, K. Zhang, C. P. Shen, H. B. Li, B. Kloss, F. C. Ma, Z. Y. Deng, M. Ripka, J. Q. Zhang, C. L. Luo, A. A. Zafar, X. Y. Zhang, X. Q. Li, W. J. Zheng, W. C. Yan, M. Fritsch, M. Kavatsyuk, Y. L. Han, J. B. Liu, Tao Luo, D. Xiao, Zhiqiang Liu, C. C. Zhang, Y. J. Sun, E. Boger, B. Zheng, R. G. Ping, B. Zhong, L. B. Guo, M. N. Achasov, Z. A. Liu, L. P. Zhou, Lei Li, B. X. Yu, M. Ullrich, Z. J. Xiao, B. X. Zhang, J. F. Qiu, V. Prasad, Yunlong Zhang, L. Fava, Z. P. Mao, Y. Ban, P. Weidenkaff, T. Ma, F. Nerling, Yang Qin, G. X. Sun, J. V. Bennett, K. Y. Liu, Li Yan, Yanping Huang, S. P. Wen, D. Bettoni, Alperen Yuncu, Jin Li, K. H. Rashid, X. H. Mo, L. S. Wang, X. S. Qin, X. R. Zhou, Z. B. Li, Z. Jiao, D. H. Zhang, Cheng Li, H. L. Dai, H. L. Ma, D. M. Li, H. P. Cheng, J. Fang, Tao Li, M. Bertani, M. Y. Dong, J. L. Zhang, Z. Haddadi, H. W. Yu, Y. X. Xia, L. L. Wang, H. Cai, H. Muramatsu, L. Yang, R. Baldini Ferroli, Krisztian Peters, M. Z. Wang, Y. T. Liang, Jianping Zheng, Ch. Rosner, X. N. Li, J. H. Zou, Andrzej Kupsc, S. Zhu, Haiping Peng, M. L. Chen, M. Pelizaeus, A. Q. Guo, S. J. Chen, W. Gradl, D. Y. Wang, M. Lv, W. M. Song, S. S. Sun, J. Y. Liu, S. X. Du, Z. H. Qin, J. J. Zhang, K. J. Li, M. Destefanis, Y. J. Mao, H. X. Yang, I. Garzia, F. De Mori, G. Felici, C. Dong, S. Sosio, J. P. Liu, Q. L. Xiu, Z. H. Wang, J. G. Messchendorp, Q. Gao, Y. N. Gao, X. Y. Zhou, Joachim Pettersson, Y. N. Guo, W. L. Yuan, Q. Ouyang, Qiunan Xu, S. S. Fang, Y. Zhang, Y. B. Liu, R. E. Mitchell, X. L. Luo, Xiaocong Ai, M. G. Zhao, Y. H. Yang, W. G. Li, Y. Q. Wang, A. G. Denig, Y. N. Zhang, W. P. Wang, F. Bianchi, X. M. Li, J. M. Bian, J. Z. Fan, S. J. Zhao, S. Spataro, X. T. Huang, E. E. Eren, Q. J. Xu, Fang Liu, J. C. Chen, Xuanhong Lou, G. Rong, H. P. Huang, Nasser Kalantar-Nayestanaki, C. Morales Morales, H. M. Liu, X. F. Wang, J. F. Hu, U. Wiedner, Z. G. Wang, H. Y. Zhang, I. Denysenko, Y. H. Guan, G. F. Cao, G. F. Chen, Q. M. Ma, J. Y. Zhang, B. Y. Zhang, S. B. Liu, X. Y. Niu, Y. Nefedov, Y. Yuan, Y. S. Zhu, Yu Zhang, Q. Liu, Tristan Weber, Y. K. Heng, L. L. Ma, L. G. Xia, A. Amoroso, A. Dbeyssi, M. Kornicer, A. Julin, Bibo Ke, W. B. Yan, S. Pacetti, and J. F. Sun

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Omega
Abstract

The decay ${Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ is searched for using data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies $\sqrt{s}=4.23$ and 4.26 GeV. No significant signal for the ${Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}$ is found, and upper limits at the 90% confidence level on the Born cross section for the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{Z}_{c}(3900{)}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}\ensuremath{\rightarrow}\ensuremath{\omega}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ are determined to be 0.26 and 0.18 pb at $\sqrt{s}=4.23$ and 4.26 GeV, respectively.

Published
2015

16. Photoproduction of hidden charm pentaquark statesPc+(4380)andPc+(4450)

Author

Xiao-Hai Liu, Qiang Zhao, and Qian Wang

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Singularity, Nuclear Theory, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, Pentaquark
Abstract

We propose to study the pentaquark candidates of P-c(+) (4380) and P-c(+) (4450) in J/psi photoproduction and look for further experimental evidence for their nature. Since the photoproduction process does not satisfy the so-called "anomalous triangle singularity" condition their presence in J/psi photoproduction would conclude that they should be genuine states and provide further evidence for their existence.

Published
2015

17. Measurement of the matrix elements for the decaysη→π+π−π0andη/η′→π0π0π0

Author

R. Kliemt, Y. H. Guan, X. L. Ji, R. Baldini Ferroli, Jie Yu, K. Goetzen, T. J. Min, K. J. Zhu, P. Kiese, Krisztian Peters, M. Z. Wang, Z. A. Liu, Y. Ding, G. Cibinetto, S. B. Liu, Z. Y. Zhang, R. A. Briere, Y. Nefedov, V. Prasad, B. J. Liu, G. S. Huang, X. S. Jiang, Y. Ban, P. Weidenkaff, X. N. Li, Haiping Peng, W. Kühn, Y. G. Xie, S. P. Wen, X. S. Qin, X. R. Zhou, H. H. Liu, J. C. Li, Li Zhou, C. Leng, Z. A. Zhu, Tao Luo, O. Cakir, Q. L. Xiu, Cheng Li, F. Li, X. N. Ma, A. Zallo, J. Zhuang, C. P. Shen, F. C. Ma, B. X. Yu, W. G. Li, X. H. Mo, L. S. Wang, A. G. Denig, Yaquan Fang, X. M. Li, M. X. Luo, X. K. Chu, C. Hu, X. Tang, J. Min, M. Fritsch, H. B. Liu, J. Z. Bai, M. H. Ye, W. L. Yuan, Q. Ouyang, Shan Wang, Xiao-Rui Lyu, L. L. Wang, H. Cai, X. P. Xu, X. B. Ji, M. Tiemens, J. Q. Zhang, Jian Wei, S. Spataro, P. Patteri, Bibo Ke, Xiao-Hai Liu, G. Li, S. S. Fang, I. Tapan, D. V. Dedovich, H. S. Chen, Alperen Yuncu, Jin Li, M. Kavatsyuk, C. D. Fu, C. Q. Feng, M. G. Zhao, Y. H. Yang, X. R. Chen, Y. H. Yan, S. Qian, Q. An, Jialun Ping, B. Kopf, Z. Y. Deng, Peilian Liu, M. Ripka, Y. F. Wang, H. L. Dai, Igor Boyko, W. B. Yan, J. F. Qiu, Y. B. Liu, Xingguo Li, Cen Zhang, H. M. Liu, Lingxuan Zhang, G. F. Xu, S. Jin, Y. J. Mo, K. L. He, Y. N. Zhang, Yang Qin, Y. B. Zhao, J. F. Hu, W. Shan, J. W. Zhao, S. W. Han, Giulietto Felici, J. H. Liu, L. Fava, K. Schoenning, B. S. Zou, T. Hussain, I. B. Nikolaev, J. H. Yin, S. Pacetti, G. F. Cao, H. J. Lu, J. G. Lu, K. Zhang, Xichao Ruan, G. S. Varner, M. Shao, Y. T. Gu, X. Y. Zhang, P. L. Wang, Jimin Zhao, B. X. Zhang, Y. X. Xia, X. L. Luo, F. Nerling, Ke Wang, Y. C. Zhu, X. Y. Ma, Y. J. Mao, M. H. Gu, W. X. Gong, K. Moriya, Y. Guo, H. X. Yang, Z. G. Wang, E. Fioravanti, H. Y. Sheng, I. Garzia, R. Poling, J. B. Liu, Y. J. Sun, E. Boger, Q. P. Ji, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Q. W. Zhao, X. K. Zhou, H. Y. Zhang, W. P. Wang, C. F. Redmer, R. Q. Lu, C. X. Yu, F. E. Maas, T. Hu, J. P. Liu, H. Liang, Y. P. Lu, F. Bianchi, Liqing Xu, S. H. Zhang, X. Y. Shen, E. H. Thorndike, V. Santoro, C. Dong, S. Sosio, S. Schumann, Yao Wang, G. F. Chen, L. Y. Dong, B. Zheng, R. G. Ping, C. H. Li, J. Y. Zhang, J. G. Messchendorp, P. F. Duan, Fenfen An, B. L. Wang, T. C. Zhao, M. Bertani, J. Dong, S. Nisar, L. H. Wu, M. Y. Dong, C. J. Tang, Z. Gao, Y. N. Pu, Z. Haddadi, L. Yang, W. J. Zheng, Guangming Huang, X. Y. Song, T. Held, Qiunan Xu, Mario Greco, S. L. Niu, Joachim Pettersson, Manuel Lara, P. X. Shen, Z. Wu, L. W. Jiang, Jie Zhao, D. X. Lin, M. Savrie, X. Q. Li, Y. Hu, Alexey Zhemchugov, H. M. Hu, Y. P. Guo, J. Y. Liu, J. H. Zou, Y. K. Heng, X. Y. Gao, Serkant Ali Cetin, F. H. Liu, S. S. Sun, W. C. Yan, A. Q. Guo, L. D. Liu, J. M. Bian, Y. L. Han, Zhiqing Zhang, Andrzej Kupsc, W. Gradl, S. J. Zhao, X. H. Liu, L. Q. Qin, Zhiqiang Liu, J. P. Dai, W. M. Song, Yunlong Zhang, J. W. Zhang, D. Bettoni, D. J. Ambrose, D. Y. Wang, X. Fang, E. E. Eren, J. B. Jiao, M. N. Achasov, L. P. Zhou, J. L. Zhang, M. Qi, H. J. Yang, F. Feldbauer, R. E. Mitchell, Feng Liu, Q. J. Xu, Jianping Zheng, M. L. Chen, F. A. Harris, Z. P. Mao, S. Zhu, J. C. Chen, M. Ablikim, M. Lv, X. C. Chen, X. Q. Hao, Fang Liu, Xuanhong Lou, Z. H. Qin, D. Xiao, S. X. Du, X. Y. Jiang, K. Y. Liu, Nasser Kalantar-Nayestanaki, Z. B. Li, H. P. Cheng, J. Fang, Tao Li, I. Denysenko, J. J. Zhang, P. Larin, M. Albrecht, A. A. Zafar, C. Morales Morales, M. Destefanis, H. B. Li, B. Kloss, Q. Gao, Y. N. Gao, B. Y. Zhang, C. L. Luo, C. Geng, Ch. Rosner, W. D. Li, Huan Ren, C. C. Zhang, B. Zhong, L. B. Guo, J. S. Huang, C. X. Liu, Lei Li, Ulrich Wiedner, Y. Zhang, T. Ma, Yanping Huang, K. H. Rashid, A. Calcaterra, Z. G. Zhao, Magnus Wolke, Y. F. Liang, H. H. Zhang, Z. J. Sun, D. P. Jin, H. Loehner, Tobias Weber, H. W. Yu, N. Qin, G. X. Sun, J. V. Bennett, Li Yan, J. Z. Fan, I. Uman, Z. Jiao, Y. T. Liang, D. H. Zhang, Y. H. Zheng, S. J. Chen, Z. P. Zhang, M. Ullrich, Z. J. Xiao, D. W. Bennett, Zujian Wang, K. J. Li, Z. H. Wang, Xiaocong Ai, H. L. Ma, D. M. Li, Y. Q. Wang, H. Muramatsu, M. Pelizaeus, X. T. Huang, Y. X. Yang, G. Rong, H. P. Huang, A. Hafner, Q. Zhao, Y. Z. Sun, Gang Zhao, Cong-Feng Qiao, O. Albayrak, N. Yu. Muchnoi, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, S. L. Olsen, Z. Y. Wang, Q. Liu, L. L. Ma, J. F. Sun, L. G. Xia, A. Amoroso, S. Marcello, A. Dbeyssi, Y. Zeng, Zhe Sun, M. Kornicer, A. Julin, F. De Mori, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, X. Y. Zhou, X. F. Wang, M. Maggiora, Ling Zhao, Q. M. Ma, X. Y. Niu, Y. Yuan, Y. S. Zhu, Yu Zhang, Lei Zhao, Z. Y. He, Z. L. Hou, C. Z. Yuan, G. A. Chelkov, Dan Wang, G. R. Liao, B. Q. Wang, Zhiqing Liu, T. Johansson, J. F. Chang, O. B. Kolcu, X. Cai, L. Zotti, L. L. Jiang, and Z. Ning

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Dalitz plot, 01 natural sciences, Prime (order theory), law.invention, Matrix (mathematics), law, 0103 physical sciences, Pi, 010306 general physics, Collider
Abstract

Based on a sample of 1.31×109 J/ψ events collected with the BESIII detector at the BEPCII collider, Dalitz plot analyses of selected 79,625 η→π+π-π0 events, 33,908 η→π0π0π0 events, and 1,888 η′→π0π0π0 events are performed. The measured matrix elements of η→π+π-π0 are in reasonable agreement with previous measurements. The Dalitz plot slope parameters of η→π0π0π0 and η′→π0π0π0 are determined to be -0.055±0.014±0.004 and -0.640±0.046±0.047, respectively, where the first uncertainties are statistical and the second systematic. Both values are consistent with previous measurements, while the precision of the latter one is improved by a factor of 3. Final state interactions are found to have an important role in those decays.

Published
2015

18. Observation of the isospin-violating decayJ/ψ→ϕπ0f0(980)

Author

P. R. Li, Xiangdong Ruan, Q. Liu, Orhan Cakir, L. L. Ma, I. Uman, L. G. Xia, D. J. Ambrose, A. Amoroso, R. Kliemt, S. L. Olsen, J. H. Liu, R. A. Briere, Xiaocong Ai, Yaquan Fang, A. Dbeyssi, Jie Yu, Jin Li, Ke Wang, X. S. Jiang, G. X. Sun, J. V. Bennett, Li Yan, A. Q. Guo, P. Larin, M. Kornicer, Z. Jiao, Fu-Hu Liu, D. H. Zhang, J. B. Jiao, M. G. Zhao, M. Albrecht, Bibo Ke, A. Julin, R. Poling, P. F. Duan, Z. G. Wang, W. M. Song, H. Y. Zhang, G. F. Chen, M. Ullrich, T. J. Min, J. Y. Zhang, W. B. Yan, K. J. Zhu, F. Li, F. C. Ma, W. D. Li, Y. K. Heng, K. Schoenning, B. S. Zou, Huan Ren, M. N. Achasov, J. M. Bian, D. Cronin-Hennessy, Zhenyu Zhang, S. J. Zhao, W. Lai, F. De Mori, Fenfen An, B. L. Wang, Giulietto Felici, X. L. Ji, G. Cibinetto, Y. J. Mo, J. C. Chen, Xuanhong Lou, S. Pacetti, Y. P. Guo, H. B. Li, X. Y. Zhou, H. L. Ma, Z. H. Qin, C. Morales Morales, Z. P. Zhang, Y. N. Pu, T. C. Zhao, X. K. Chu, D. M. Li, Talib Hussain, M. Maggiora, Ling Zhao, H. Muramatsu, X. F. Wang, D. W. Bennett, H. Liang, Zujian Wang, Y. H. Guan, H. S. Chen, T. Weber, A. G. Denig, C. L. Luo, J. F. Qiu, S. L. Niu, Q. A. Malik, Q. P. Ji, Lei Zhao, M. Pelizaeus, H. X. Yang, R. Baldini Ferroli, Q. M. Ma, B. Kloss, I. Garzia, Z. Y. He, Z. L. Hou, Yang Yang, Jie Zhao, D. X. Lin, X. Y. Niu, K. Li, I. Tapan, Kai Liu, J. Z. Bai, Peilian Liu, Q. J. Xu, D. Y. Wang, X. Q. Li, Y. Yuan, Y. S. Zhu, M. Greco, Alexey Zhemchugov, H. M. Hu, X. K. Zhou, Y. H. Yan, Fang Liu, L. Fava, Qun-Yao Wang, C. C. Zhang, S. Qian, Jialun Ping, B. Zhong, L. B. Guo, C. Dong, S. Sosio, J. W. Zhao, Y. J. Mao, Huihui Liu, I. Denysenko, J. Min, Y. B. Zhao, H. W. Yu, C. Leng, X. N. Li, K. Zhang, Liqing Xu, S. H. Zhang, X. Y. Shen, Zhiqing Liu, J. P. Liu, Y. C. Zhu, LiLi Zhang, W. Shan, X. Y. Zhang, F. Nerling, V. Santoro, J. Y. Liu, J. Dong, Li Zhou, Haiping Peng, J. W. Zhang, Y. Nefedov, M. Lara, Ulrich Wiedner, B. Y. Zhang, J. G. Messchendorp, Y. Ding, J. P. Dai, O. Bondarenko, Joachim Pettersson, Qiunan Xu, Andrzej Kupsc, W. L. Yuan, M. L. Chen, W. G. Li, Y. L. Han, T. Ma, M. Y. Dong, S. Han, M. Tiemens, Yunlong Zhang, X. M. Li, E. Boger, W. Kühn, B. Kopf, C. Z. Yuan, S. Spataro, Y. H. Zheng, Cong-Feng Qiao, K. Y. Liu, O. Albayrak, H. B. Liu, Y. J. Sun, Y. P. Lu, Y. Q. Wang, T. Johansson, J. F. Chang, S. Nisar, C. J. Tang, Y. Hu, J. Q. Zhang, D. Bettoni, J. L. Zhang, J. H. Zou, Q. Gao, M. H. Gu, A. Yuncu, H. Y. Sheng, X. P. Xu, S. X. Du, Tao Luo, B. X. Yu, L. H. Wu, Z. A. Zhu, T. Held, K. L. He, Yang Qin, S. S. Sun, A. Calcaterra, Z. G. Zhao, G. F. Xu, Jianping Zheng, S. Zhu, H. J. Lu, M. Savrie, X. B. Ji, J. G. Lu, M. Lv, Y. Zhang, W. C. Yan, Q. An, B. Wang, N. Yu. Muchnoi, Yuehong Xie, Lei Li, X. S. Kang, Heng-Yun Ye, J. Z. Fan, X. H. Mo, Shan Wang, H. M. Liu, M. Z. Wang, Jimin Zhao, D. Xiao, Zhiqiang Liu, L. S. Wang, Guangshun Huang, N. Kalantar-Nayestanaki, C. X. Yu, J. J. Zhang, M. H. Ye, M. Destefanis, F. E. Maas, X. Y. Gao, Magnus Wolke, Z. B. Li, L. Zotti, Xiao-Rui Lyu, G. F. Cao, Y. H. Zhang, Y. X. Xia, R. E. Mitchell, C. P. Shen, Y. F. Liang, L. P. Zhou, T. Hu, C. Hu, S. Jin, X. Tang, D. P. Jin, X. Cai, P. Patteri, Xiao-Hai Liu, Y. X. Yang, H. L. Dai, Igor Boyko, Z. J. Sun, H. Loehner, B. Zheng, R. G. Ping, R. Q. Lu, M. Qi, Z. P. Mao, O. B. Kolcu, X. Liu, X. Q. Hao, Y. F. Wang, Dayong Wang, N. Qin, Z. Y. Wang, L. L. Wang, H. Cai, P. L. Wang, G. S. Varner, Z. J. Xiao, H. H. Zhang, H. P. Cheng, G. A. Chelkov, J. Fang, Tao Li, Guangming Huang, K. Moriya, A. Hafner, E. H. Thorndike, J. C. Li, Q. Zhao, Y. Z. Sun, Z. Gao, Z. T. Sun, Y. Guo, Z. A. Liu, P. X. Shen, Z. Wu, Serkant Ali Cetin, Ch. Rosner, Z. H. Wang, L. W. Jiang, L. Q. Qin, J. Zhuang, F. Feldbauer, Xiang Zhou, M. X. Luo, Jian Wei, Zhiqing Zhang, C. F. Redmer, L. L. Jiang, Yucheng Huang, D. V. Dedovich, G. Li, Gang Zhao, X. C. Chen, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, L. D. Liu, H. P. Huang, S. B. Liu, M. Bertani, X. Y. Song, Y. Ban, P. Weidenkaff, Z. Haddadi, L. Yang, L. Y. Dong, X. Y. Ma, F. A. Harris, Sai-Juan Chen, C. Geng, W. X. Gong, Z. Ning, C. D. Fu, W. J. Zheng, W. Gradl, M. Ripka, C. Q. Feng, X. R. Chen, Z. Y. Deng, I. B. Nikolaev, S. P. Wen, J. H. Yin, K. Goetzen, X. S. Qin, X. R. Zhou, K. H. Rashid, Cheng Li, M. Shao, Y. T. Gu, Xingguo Li, E. Fioravanti, X. L. Kang, A. Sarantsev, D. H. Wei, J. S. Lange, Q. W. Zhao, C. H. Li, S. Ma, D. Toth, J. S. Huang, C. X. Liu, J. F. Sun, S. Marcello, Y. Zeng, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Krisztian Peters, G. R. Liao, J. F. Hu, X. N. Ma, Y. T. Liang, A. Zallo, M. Fritsch, M. Kavatsyuk, B. X. Zhang, Chi Zhang, Brent J. Liu, X. Fang, Feng Liu, S. Schumann, Yao Wang, Q. L. Xiu, Q. Ouyang, S. S. Fang, Y. B. Liu, X. L. Luo, Y. Gao, W. P. Wang, and F. Bianchi

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, Nuclear physics, Isospin, 0103 physical sciences, Pi, Mass spectrum, High Energy Physics::Experiment, 010306 general physics, Radioactive decay
Abstract

Using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector at the BEPCII collider, the decays J/psi -> phi pi(+)pi(-)pi(0) and J/psi -> phi pi(0)pi(0)pi(0) are investigated. The isospin- violating decay J/psi -> phi pi(0)f(0)(980) with f(0)(980)-> pi pi is observed for the first time. The width of the f(0)(980) obtained from the dipion mass spectrum is found to be much smaller than the world average value. In the pi(0)f(0)(980) mass spectrum, there is evidence of f(1)(1285) production. By studying the decay J/psi ->eta', the branching fractions of eta' -> pi(+)pi(-)pi(0) and eta' -> pi(0)pi(0)pi(0), as well as their ratio, are also measured.

Published
2015

19. Search for the isospin violating decayY(4260)→J/ψηπ0

Author

Y. H. Guan, Y. J. Mao, I. Uman, Kai Liu, J. Y. Liu, Y. Nefedov, J. Min, Shan Wang, Xiao-Rui Lyu, S. Ma, Bibo Ke, B. Kopf, Chi Zhang, D. Toth, Brent J. Liu, W. B. Yan, M. N. Achasov, L. L. Jiang, Giulietto Felici, S. Pacetti, O. B. Kolcu, S. Schumann, M. Ullrich, Q. Gao, G. S. Varner, F. A. Harris, J. M. Bian, Zhenyu Zhang, S. J. Zhao, W. Lai, Y. F. Wang, Y. Zhang, Q. An, K. L. He, M. Z. Wang, J. S. Huang, C. X. Liu, K. Goetzen, L. Zotti, C. Hu, Z. Ning, J. Z. Fan, X. Tang, Y. Ding, K. Li, X. K. Zhou, Fang Liu, Jimin Zhao, Yao Wang, Y. B. Zhao, W. Shan, J. Dong, J. C. Chen, I. Denysenko, X. Y. Ma, W. C. Yan, G. F. Xu, Yang Qin, I. B. Nikolaev, S. Jin, W. X. Gong, I. Tapan, Krisztian Peters, Xuanhong Lou, Y. H. Yan, Y. Guo, B. Y. Zhang, Zhiqiang Liu, J. H. Yin, K. H. Rashid, Y. Q. Wang, R. Q. Lu, J. H. Liu, Ke Wang, X. Y. Song, S. Nisar, M. Bertani, Y. X. Xia, M. Shao, Y. T. Gu, J. W. Zhao, Z. Haddadi, L. Yang, L. P. Zhou, S. Han, F. De Mori, D. Cronin-Hennessy, Y. C. Zhu, X. L. Ji, C. Morales Morales, C. J. Tang, Y. Hu, Zhiqing Liu, W. Kühn, Y. P. Lu, G. R. Liao, J. F. Hu, E. Fioravanti, M. Y. Dong, C. H. Li, Guangshun Huang, T. Johansson, J. F. Chang, K. J. Zhu, Z. P. Mao, Jin Li, Talib Hussain, H. P. Cheng, J. Fang, Tao Li, Z. A. Zhu, P. F. Duan, B. Wang, L. H. Wu, D. Xiao, H. B. Liu, X. L. Kang, A. Sarantsev, D. H. Wei, K. Moriya, H. J. Lu, J. G. Lu, J. S. Lange, Q. W. Zhao, E. Boger, Fenfen An, X. Cai, T. Held, X. Q. Hao, J. F. Sun, Z. Gao, B. L. Wang, M. H. Ye, H. L. Ma, D. M. Li, J. H. Zou, M. G. Zhao, Y. L. Han, Yunlong Zhang, M. Savrie, S. L. Niu, Y. P. Guo, S. Marcello, Y. Zeng, T. C. Zhao, Y. G. Xie, D. J. Ambrose, H. H. Zhang, L. D. Liu, Li Zhou, M. Pelizaeus, Y. X. Yang, C. P. Shen, S. S. Sun, Z. P. Zhang, L. Y. Dong, D. Bettoni, X. Y. Zhou, Y. N. Pu, X. Fang, J. L. Zhang, A. Q. Guo, P. L. Wang, G. A. Chelkov, S. X. Du, Andrzej Kupsc, Xiaocong Ai, Y. J. Mo, X. Q. Li, Jie Zhao, D. X. Lin, Z. G. Wang, H. Y. Zhang, M. Greco, R. Poling, Jianping Zheng, H. B. Li, X. Y. Gao, Tao Luo, A. Hafner, Q. Zhao, Y. Z. Sun, W. L. Yuan, S. Zhu, M. L. Chen, M. Lv, W. J. Zheng, Alexey Zhemchugov, H. M. Hu, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, F. E. Maas, T. Hu, G. F. Chen, J. Y. Zhang, W. Gradl, Feng Liu, M. Ripka, M. Albrecht, W. D. Li, B. X. Yu, M. Maggiora, Ling Zhao, H. Liang, Q. P. Ji, Lei Zhao, W. M. Song, R. E. Mitchell, Xiang Zhou, H. S. Chen, T. Weber, J. J. Zhang, K. Y. Liu, D. W. Bennett, Zujian Wang, X. F. Wang, Z. B. Li, M. Destefanis, Q. M. Ma, Z. Y. He, Z. L. Hou, Yang Yang, J. W. Zhang, D. Y. Wang, A. G. Denig, C. L. Luo, Gang Zhao, Y. K. Heng, Liqing Xu, S. H. Zhang, X. Y. Shen, Orhan Cakir, X. H. Mo, L. S. Wang, N. Kalantar-Nayestanaki, Q. A. Malik, V. Santoro, B. Kloss, S. L. Olsen, R. A. Briere, C. Dong, H. L. Dai, Igor Boyko, S. Sosio, C. Z. Yuan, Z. H. Qin, L. L. Wang, H. Cai, X. S. Jiang, Guangming Huang, P. X. Shen, P. R. Li, M. Qi, X. Y. Niu, Y. Yuan, X. N. Ma, Z. Wu, L. W. Jiang, F. Li, H. W. Yu, H. X. Yang, F. C. Ma, Joachim Pettersson, P. Larin, I. Garzia, R. Baldini Ferroli, Y. T. Liang, Magnus Wolke, Yaquan Fang, A. Zallo, Y. S. Zhu, Xiangdong Ruan, Zhiqing Zhang, O. Bondarenko, Huan Ren, Q. J. Xu, Y. F. Liang, J. P. Liu, G. X. Sun, J. V. Bennett, Li Yan, D. P. Jin, Q. Liu, M. Fritsch, J. G. Messchendorp, K. Schoenning, X. N. Li, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Z. H. Wang, C. Leng, B. S. Zou, C. C. Zhang, J. P. Dai, Haiping Peng, Qiunan Xu, M. Kavatsyuk, L. L. Ma, C. F. Redmer, W. G. Li, X. M. Li, B. Zhong, L. B. Guo, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, S. Spataro, X. P. Xu, H. P. Huang, B. X. Zhang, L. G. Xia, J. F. Qiu, A. Amoroso, J. Q. Zhang, L. Fava, S. B. Liu, Lei Li, H. M. Liu, G. F. Cao, A. Dbeyssi, Dayong Wang, N. Qin, F. Nerling, M. Kornicer, A. Julin, H. Muramatsu, Ulrich Wiedner, T. Ma, A. Calcaterra, Z. G. Zhao, Z. J. Sun, H. Loehner, H. H. Liu, J. C. Li, J. Zhuang, M. X. Luo, Jian Wei, Yucheng Huang, D. V. Dedovich, G. Li, Sai-Juan Chen, C. D. Fu, C. Q. Feng, X. R. Chen, Z. Y. Deng, Xingguo Li, R. Kliemt, Jie Yu, T. J. Min, G. Cibinetto, J. Z. Bai, X. B. Ji, M. Tiemens, P. Patteri, Xiao-Hai Liu, E. H. Thorndike, L. Q. Qin, F. Feldbauer, X. L. Luo, X. C. Chen, Y. Gao, W. P. Wang, F. Bianchi, C. Geng, Z. T. Sun, Z. A. Liu, X. Liu, Y. H. Zheng, Cong-Feng Qiao, O. Albayrak, N. Yu. Muchnoi, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, Z. Y. Wang, Z. J. Xiao, Y. Ban, P. Weidenkaff, Serkant Ali Cetin, S. P. Wen, X. S. Qin, X. R. Zhou, J. B. Jiao, Cheng Li, Q. Ouyang, S. S. Fang, X. K. Chu, S. Qian, Jialun Ping, K. Zhang, X. Y. Zhang, M. Lara, Y. B. Liu, Y. J. Sun, Peilian Liu, Lingxuan Zhang, Qun-Yao Wang, Q. L. Xiu, M. H. Gu, A. Yuncu, H. Y. Sheng, C. X. Yu, B. Zheng, and R. G. Ping

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Positron, Isospin, Sigma, Statistical analysis, Electron, Storage ring
Abstract

Using data samples collected at center-of-mass energies of root s = 4.009, 4.226, 4.257, 4.358, 4.416, and 4.599 GeV with the BESIII detector operating at the BEPCII storage ring, we search for the isospin violating decay Y(4260)-> J/psi eta pi(0). No signal is observed, and upper limits on the cross section sigma(e(+)e(-) -> J/psi eta pi(0)) at the 90% confidence level are determined to be 3.6, 1.7, 2.4, 1.4, 0.9, and 1.9 pb, respectively.

Published
2015

20. Observation of the Dalitz decayη′→γe+e−

Author

F. C. Ma, Z. A. Liu, J. Z. Bai, J. F. Qiu, Zhiyong Zhang, Y. H. Zheng, Cong-Feng Qiao, O. Albayrak, L. Fava, Meng Wang, Y. Ding, Y. Ban, P. Weidenkaff, X. Liu, M. Qi, H. P. Huang, N. Yu. Muchnoi, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, Bibo Ke, W. B. Yan, B. J. Liu, S. P. Wen, Steffen Schumann, X. S. Qin, X. R. Zhou, Y. J. Mao, Z. J. Xiao, Xiangdong Ruan, M. N. Achasov, Cheng Li, Y. P. Guo, J. Y. Liu, Giulietto Felici, S. Pacetti, W. Kühn, Serkant Ali Cetin, D. W. Bennett, Zujian Wang, Lei Zhao, X. B. Ji, M. Tiemens, Z. G. Wang, P. R. Li, Z. Y. Wang, Z. A. Zhu, Y. B. Zhao, W. Shan, T. Weber, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, Fu-Hu Liu, D. H. Zhang, J. Dong, Y. Q. Wang, S. Nisar, C. J. Tang, Yifei Zhang, Y. Hu, Y. P. Lu, Kai Liu, H. Y. Zhang, L. L. Ma, L. G. Xia, Xin Fang, D. Xiao, H. J. Lu, J. G. Lu, Y. H. Guan, P. Patteri, A. Amoroso, Xiao-Hai Liu, E. H. Thorndike, G. F. Chen, Q. Gao, F. E. Maas, T. Hu, A. Dbeyssi, X. K. Chu, Teng Li, S. Qian, Jialun Ping, K. Zhang, I. Tapan, Y. H. Yan, Z. Gao, C. P. Shen, Feng Liu, L. Q. Qin, F. Feldbauer, X. Y. Zhang, J. W. Zhao, J. F. Sun, Y. Zhang, Q. An, Y. Nefedov, J. Y. Zhang, M. Kornicer, M. Lara, Y. J. Sun, Peilian Liu, G. Li, A. Julin, F. De Mori, K. Li, X. K. Zhou, Fang Liu, I. Denysenko, Y. Zeng, Guangming Huang, C. D. Fu, P. X. Shen, C. Q. Feng, Lingxuan Zhang, X. L. Ji, Talib Hussain, Qun-Yao Wang, Y. J. Mo, Z. Y. Deng, S. B. Liu, J. Min, Yong-Feng Huang, D. Cronin-Hennessy, Y. C. Zhu, E. Boger, X. C. Chen, Qian Liu, Z. Wu, H. X. Yang, I. Garzia, A. Calcaterra, Z. G. Zhao, B. Y. Zhang, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Y. X. Yang, L. W. Jiang, Q. A. Malik, C. Dong, S. Sosio, M. H. Gu, Xingguo Li, X. Y. Zhou, B. Kopf, T. Held, H. S. Chen, X. H. Mo, L. S. Wang, M. H. Ye, Magnus Wolke, Joachim Pettersson, Zhiqing Zhang, O. B. Kolcu, C. F. Redmer, Xiaocong Ai, R. Kliemt, Zhiqing Liu, A. Yuncu, J. B. Jiao, Y. F. Liang, H. Y. Sheng, C. Geng, Q. P. Ji, K. L. He, Jingzhou Fan, Y. G. Xie, D. J. Ambrose, D. P. Jin, C. X. Yu, Li Zhou, G. F. Xu, Y. L. Han, J. F. Chang, Jie Yu, H. H. Zhang, M. Y. Dong, J. P. Liu, Z. J. Sun, Krisztian Peters, A. Hafner, Q. M. Ma, Q. Zhao, Y. Z. Sun, J. G. Messchendorp, L. L. Wang, H. Cai, C. Leng, H. Loehner, G. A. Chelkov, X. T. Huang, S. X. Du, Liqing Xu, S. H. Zhang, Jimin Zhao, X. Y. Shen, H. B. Liu, V. Santoro, X. R. Chen, S. Jin, M. Ablikim, A. A. Zafar, Dayong Wang, N. Qin, B. Zheng, R. G. Ping, T. J. Min, K. J. Zhu, G. Rong, J. P. Dai, B. Kloss, X. Y. Niu, D. Bettoni, J. H. Zou, M. Albrecht, G. S. Huang, I. B. Nikolaev, R. Q. Lu, Y. Yuan, Y. S. Zhu, Shan Wang, Xiao-Rui Lyu, J. L. Zhang, G. R. Liao, J. F. Hu, P. L. Wang, Gang Zhao, Y. Guo, A. Q. Guo, J. H. Yin, K. H. Rashid, I. Uman, M. Shao, Y. T. Gu, X. Cai, M. Maggiora, Ling Zhao, H. Liang, S. S. Sun, Xuejun Wang, M. Bertani, W. D. Li, Jianping Zheng, S. Zhu, J. Q. Zhang, W. M. Song, Z. Y. He, Z. Haddadi, L. Yang, Xiaokang Zhou, Hao-Ran Yu, X. Y. Song, Qingnian Xu, Z. L. Hou, G. S. Varner, M. Lv, Yang Yang, X. Q. Hao, H. B. Li, A. G. Denig, Z. H. Qin, Y. N. Pu, E. Fioravanti, D. Y. Wang, C. L. Luo, R. E. Mitchell, W. G. Li, S. J. Chen, Z. Ning, J. J. Zhang, M. Destefanis, M. Ullrich, X. M. Li, O. Bondarenko, S. Spataro, X. P. Xu, X. L. Kang, A. Sarantsev, D. H. Wei, H. L. Ma, J. S. Lange, Q. W. Zhao, L. Zotti, C. Hu, K. Goetzen, Lei Li, H. M. Liu, S. Han, D. M. Li, H. Muramatsu, X. Tang, C. Z. Yuan, W. C. Yan, Jie Zhao, D. X. Lin, W. Gradl, M. Ripka, C. C. Zhang, Alexey Zhemchugov, H. M. Hu, Zhao-Long Wang, G. F. Cao, Zhiqiang Liu, B. Zhong, L. B. Guo, M. Pelizaeus, L. D. Liu, L. H. Wu, L. Y. Dong, M. Savrie, B. Wang, Y.N. Gao, Ulrich Wiedner, W. J. Zheng, X. Y. Gao, F. Nerling, L. P. Zhou, Andrzej Kupsc, T. Ma, S. Ma, D. Toth, M. L. Chen, H. H. Liu, J. W. Zhang, Z. P. Mao, J. C. Li, H. P. Cheng, J. Fang, L. L. Jiang, J. S. Huang, J. Zhuang, M. X. Luo, D. V. Dedovich, C. X. Liu, F. A. Harris, A. Zallo, Yaquan Fang, Yang Qin, Tao Luo, Y. X. Xia, K. Schoenning, B. S. Zou, W. L. Yuan, B. X. Yu, X. N. Ma, Y. T. Liang, Z. B. Li, Y. K. Heng, Shujun Zhao, M. Fritsch, H. L. Dai, Igor Boyko, M. Kavatsyuk, G. Cibinetto, R. Baldini Ferroli, P. Larin, B. X. Zhang, Changjin Zhang, J. M. Bian, Q. J. Xu, Q. Ouyang, Huan Ren, Yao Wang, Zhenyu Zhang, W. Lai, X. N. Li, Haiping Peng, J. H. Liu, Ke Wang, S. S. Fang, R. Poling, P. F. Duan, Fenfen An, B. L. Wang, T. C. Zhao, Y. B. Liu, J. C. Chen, Xuanhong Lou, Nasser Kalantar-Nayestanaki, C. Morales Morales, Jin Li, M. G. Zhao, X. L. Luo, W. P. Wang, F. Bianchi, S. Marcello, Y. F. Wang, K. Moriya, X. Y. Ma, W. X. Gong, C. H. Li, S. L. Niu, X. Q. Li, M. Greco, K. Y. Liu, J. B. Wei, Tord Johansson, Orhan Cakir, Q. L. Xiu, S. L. Olsen, R. A. Briere, X. S. Jiang, Z. T. Sun, and F. Li

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Form factor (quantum field theory), Vector meson dominance, 01 natural sciences, Gamma gamma, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Invariant mass, Vector meson, Nuclear Experiment, 010306 general physics
Abstract

We report the first observation of the Dalitz decay eta' -> gamma e(+)e(-), based on a data sample of 1.31 billion J/psi events collected with the BESIII detector. The eta' mesons are produced via the J/psi -> gamma eta' decay process. The ratio (eta' -> gamma e(+)e(-))/Gamma (eta' -> gamma gamma) is measured to be (2.13 +/- 0.09(stat) +/- 0.07(sys)) x 10(-2). This corresponds to a branching fraction B(eta' -> gamma e(+)e(-)) = (4.69 +/- 0.20(stat) +/- 0.23(sys)) x 10(-4). The transition form factor is extracted and different expressions are compared to the measured dependence on the e(+)e(-) invariant mass. The results are consistent with the prediction of the vector meson dominance model.

Published
2015

21. Search forD0→γγand improved measurement of the branching fraction forD0→π0π0

Author

J. P. Dai, G. Chen, H. H. Liu, I. Uman, J. C. Li, Q. J. Xu, M. Ullrich, X. N. Ma, K. Peters, F. De Mori, Y. T. Liang, J. F. Hu, H. Liang, X. Y. Zhou, Z. H. Wang, Y. H. Yan, Z. A. Zhu, Z. Haddadi, L. Yang, Y. H. Guan, X. T. Huang, M. Fritsch, S. Spataro, I. Denysenko, A. Calcaterra, M. Maggiora, C. F. Redmer, Xiaocong Ai, D. Cronin-Hennessy, H. Y. Sheng, Y. Zeng, J. M. Bian, Zhenyu Zhang, W. Lai, M. Kavatsyuk, H. H. Zhang, C. Morales Morales, S. X. Du, S. S. Fang, Y. X. Yang, E. H. Thorndike, B. X. Zhang, Z. J. Sun, J. F. Sun, M. Ablikim, W. Shan, Q. L. Xiu, Andrzej Kupsc, B. Kloss, W. L. Yuan, H. P. Huang, C. Leng, R. Baldini Ferroli, M. Qi, J. Dong, S. P. Wen, Lei Zhao, Z. Y. He, Yang Yang, X. Y. Niu, Y. F. Wang, F. A. Harris, G. F. Xu, Z. G. Zhao, A. A. Zafar, M. H. Gu, M. Ripka, T. Held, A. Hafner, S. Marcello, G. R. Liao, D. Dedovich, Q. Zhao, Y. Z. Sun, F. C. Ma, Y. Q. Wang, Y. S. Zhu, J. P. Zheng, Q. Ouyang, C. X. Yu, A. Denig, Zhiqing Liu, D. Y. Wang, X. F. Wang, S. Nisar, Yang Qin, Z. P. Mao, F. Li, Xiang Zhou, Y. Ban, S. Pacetti, C. J. Tang, Y. Hu, Y. B. Chen, S. B. Liu, L. B. Guo, D. H. Wei, R. E. Mitchell, X. L. Ji, T. Johansson, X. H. Mo, Q. M. Ma, O. Albayrak, J. W. Zhao, C. C. Zhang, L. L. Wang, Xiaofeng Zhu, J. Z. Zhang, J. H. Yin, A. Sarantsev, Y. P. Lu, S. L. Niu, K. H. Rashid, I. Tapan, K. Wang, M. Y. Dong, H. X. Yang, Kai Liu, X. N. Li, J. C. Chen, X. S. Qin, A. Zallo, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, H. Muramatsu, Z. L. Hou, G. F. Cao, X. Q. Li, I. B. Nikolaev, Y. Guo, Magnus Wolke, J. Z. Bai, D. P. Jin, B. Wang, Z. H. Qin, J. F. Qiu, F. Nerling, D. J. Ambrose, X. Fang, H. W. Yu, Q. P. Ji, X. C. Lou, U. Wiedner, C. P. Shen, Y. B. Liu, H. L. Ma, L. L. Ma, S. J. Zhao, X. D. Ruan, Dayong Wang, N. Qin, S. Ma, J. V. Bennett, X. Q. Hao, P. L. Liu, X. L. Luo, R. G. Ping, Feng Liu, S. Qian, C. X. Liu, M. Kornicer, Z. Y. Wang, X. Tang, A. Amoroso, D. Toth, M. Shao, O. Bondarenko, T. Hussain, L. G. Xia, M. L. Chen, N. Yu. Muchnoi, E. Fioravanti, J. G. Lu, J. Y. Liu, D. M. Li, A. Yuncu, P. L. Wang, A. Dbeyssi, Guangshun Huang, S. Han, L. Yan, H. B. Liu, Y. Xia, Chi Zhang, F. Feldbauer, M. Albrecht, Brent J. Liu, Q. Gao, X. Y. Zhang, Y. Zhang, B. S. Zou, X. L. Kang, S. Jin, Li Zhou, M. Savrie, K. Y. Liu, G. Chelkov, S. Schumann, D. Xiao, X. Y. Shen, W. C. Yan, X. C. Chen, Q. W. Zhao, Yuehong Xie, L. H. Wu, J. Z. Fan, A. Zhemchugov, Y. T. Gu, A. Julin, M. H. Ye, T. Hu, X. Y. Gao, J. Q. Zhang, J. B. Wei, Zhiqiang Liu, Y. Gao, Yao Wang, W. B. Yan, L. Q. Qin, K. Goetzen, Y. Huang, J. H. Liu, I. Boyko, H. P. Peng, W. P. Wang, F. Bianchi, H. Loehner, M. Pelizaeus, C. Geng, Z. P. Zhang, P. Weidenkaff, L. D. Liu, L. P. Zhou, O. Cakir, S. L. Olsen, R. A. Briere, R. Poling, C. Z. Yuan, B. Kopf, Xiao-Rui Lyu, Z. Ning, L. L. Jiang, Q. An, H. J. Lu, Jimin Zhao, P. R. Li, X. S. Jiang, P. F. Duan, J. L. Ping, Z. Jiao, X. Cai, H. P. Cheng, W. J. Zheng, B. L. Wang, T. Ma, C. L. Luo, Y. C. Zhu, Tao Li, Y. Nefedov, R. Q. Lu, Z. Gao, Z. Wu, J. Zhuang, K. Li, X. K. Zhou, Fang Liu, X. Y. Ma, Fu-Hu Liu, C. Q. Feng, C. F. Qiao, Y. J. Sun, K. Zhang, P. Larin, Y. K. Heng, W. Gradl, Yaquan Fang, K. Moriya, L. S. Wang, N. Kalantar-Nayestanaki, S. S. Sun, M. Lara, Y. P. Guo, S. Zhu, H. Cai, Z. B. Li, G. S. Varner, B. Y. Zhang, C. H. Li, D. W. Bennett, Zujian Wang, D. H. Zhang, K. Schoenning, K. L. He, J. B. Jiao, Huan Ren, J. F. Chang, X. B. Ji, T. C. Zhao, X. Liu, Bibo Ke, Y. H. Zheng, X. H. Zhao, M. N. Achasov, Giulietto Felici, Y. N. Pu, S. G. Wang, H. M. Hu, C. D. Fu, Serkant Ali Cetin, Jie Zhao, M. Wang, J. W. Zhang, G. M. Huang, W. G. Li, X. M. Li, X. P. Xu, Y. B. Zhao, Lei Li, H. M. Liu, W. X. Gong, Q. Liu, G. X. Sun, I. Garzia, B. Zhong, J. P. Liu, O. B. Kolcu, J. G. Messchendorp, Qiunan Xu, A. Q. Guo, G. Rong, W. M. Song, J. Fang, Z. G. Wang, H. Y. Zhang, J. S. Lange, J. Y. Zhang, M. X. Luo, J. S. Huang, Jin Li, M. Destefanis, M. G. Zhao, L. Fava, F. E. Maas, Y. F. Liang, H. L. Dai, Y. J. Mo, P. X. Shen, M. Bertani, L. W. Jiang, H. S. Chen, F. F. An, T. Weber, Zhiqing Zhang, B. X. Yu, Sai-Juan Chen, Ling Zhao, Liqing Xu, X. R. Chen, S. H. Zhang, V. Santoro, M. Greco, W. D. Li, W. Kühn, J. H. Zou, T. Luo, M. Tiemens, X. Y. Song, P. Patteri, Xiao-Hai Liu, Y. Yuan, R. Kliemt, Jie Yu, T. J. Min, K. J. Zhu, G. Zhao, G. Cibinetto, X. K. Chu, Qun-Yao Wang, LiLi Zhang, J. Min, Y. J. Mao, D. X. Lin, Z. J. Xiao, B. Zheng, Z. T. Sun, Z. A. Liu, H. B. Li, L. Y. Dong, G. Li, X. R. Zhou, Z. Y. Deng, Cheng Li, Q. A. Malik, E. Boger, C. Dong, S. Sosio, Joachim Pettersson, L. Zotti, C. Hu, Y. L. Han, X. L. Li, Yunlong Zhang, Y. Ding, D. Bettoni, J. L. Zhang, M. Lv, and J. J. Zhang

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Neutral current, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 01 natural sciences, Gamma gamma, Nuclear physics, 0103 physical sciences, Pi, 010306 general physics
Abstract

Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D-0 -> gamma gamma using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D-0 -> gamma gamma pi(0)pi(0)) = (8.24 +/- 0.21(stat) +/- 0.30(syst)) x 10(-4), the most precise measurement to date and consistent with the current world average.

Published
2015

22. Study ofχcJdecaying intoϕK*(892)K¯

Author

Tao Luo, Y. J. Mao, H. X. Yang, Y. J. Mo, I. Garzia, X. Fang, H. H. Liu, F. Feldbauer, B. X. Yu, J. C. Li, M. H. Ye, Feng Liu, Z. Gao, S. L. Niu, J. Zhuang, H. S. Chen, M. Ablikim, M. X. Luo, Jian Wei, D. V. Dedovich, X. Q. Li, Alperen Yuncu, Jin Li, X. L. Ji, Q. P. Ji, H. L. Dai, Igor Boyko, Yang Qin, J. P. Liu, Z. Ning, G. A. Chelkov, Liqing Xu, L. Y. Dong, Y. H. Guan, S. H. Zhang, J. Y. Liu, H. L. Ma, Dan Wang, M. Bertani, Q. Gao, Y. N. Gao, Y. Zhang, D. M. Li, Z. Y. Zhang, J. Z. Fan, J. F. Sun, H. Muramatsu, M. Pelizaeus, M. Y. Dong, X. Y. Shen, Z. Haddadi, K. Y. Liu, V. Santoro, Y. X. Xia, J. G. Messchendorp, H. J. Lu, S. Marcello, Y. Zeng, X. K. Zhou, J. G. Lu, L. Yang, Z. B. Li, F. Li, A. A. Zafar, Zhe Sun, Y. X. Yang, O. Bondarenko, Zhenli Xu, Y. H. Zheng, J. H. Liu, Qiunan Xu, Cong-Feng Qiao, O. Albayrak, Ke Wang, Y. G. Xie, A. Hafner, Q. Zhao, Y. Z. Sun, Z. G. Wang, W. J. Zheng, H. B. Li, B. Kloss, F. C. Ma, J. H. Zou, Gang Zhao, S. Schumann, J. Z. Bai, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Yao Wang, Y. Ding, S. B. Liu, Andrzej Kupsc, Li Zhou, F. De Mori, Q. L. Xiu, N. Yu. Muchnoi, Y. F. Wang, C. L. Luo, P. L. Wang, X. S. Kang, Heng-Yun Ye, S. S. Sun, F. E. Maas, Y. H. Zhang, S. Qian, Q. An, Jialun Ping, T. Hu, C. C. Zhang, Y. Nefedov, D. J. Ambrose, K. H. Rashid, Y. L. Han, B. J. Liu, W. G. Li, A. G. Denig, M. L. Chen, W. Kühn, M. Maggiora, Ling Zhao, X. L. Luo, X. N. Ma, K. Zhang, J. F. Qiu, S. L. Olsen, T. Hussain, H. Y. Zhang, X. Y. Ma, B. Zhong, L. B. Guo, R. Poling, W. Gradl, W. X. Gong, X. Y. Zhang, A. Zallo, Z. Y. Wang, D. Y. Wang, M. Qi, P. F. Duan, Fenfen An, Lei Li, Guangming Huang, H. W. Yu, L. Fava, Y. T. Liang, X. M. Li, L. D. Liu, S. Ma, S. Spataro, Z. A. Zhu, P. X. Shen, Yaquan Fang, X. Y. Zhou, W. P. Wang, F. Nerling, R. E. Mitchell, Ulrich Wiedner, G. R. Liao, B. L. Wang, F. Bianchi, C. H. Li, B. Q. Wang, Z. Wu, M. Fritsch, T. C. Zhao, L. W. Jiang, I. B. Nikolaev, Yunlong Zhang, T. Ma, J. H. Yin, Lei Zhao, Z. Y. He, Z. L. Hou, S. J. Chen, Y. B. Zhao, Zhiqing Zhang, M. Kavatsyuk, W. Shan, J. Dong, Bibo Ke, Shan Wang, Xiao-Rui Lyu, C. P. Shen, H. M. Liu, Y. J. Sun, E. Boger, G. F. Chen, X. P. Xu, X. B. Ji, M. Tiemens, Yanping Huang, W. B. Yan, Y. N. Pu, R. A. Briere, K. J. Li, Cen Zhang, D. Toth, M. Shao, Y. T. Gu, E. H. Thorndike, D. Bettoni, C. Leng, L. Zotti, J. F. Hu, Giulietto Felici, S. Pacetti, B. X. Zhang, Y. P. Lu, G. S. Varner, G. F. Cao, M. Albrecht, G. S. Huang, P. Patteri, X. S. Jiang, J. Y. Zhang, X. F. Wang, K. Schoenning, B. S. Zou, S. Nisar, R. Baldini Ferroli, Xiao-Hai Liu, C. J. Tang, A. Calcaterra, Z. G. Zhao, L. L. Jiang, Manuel Lara, Jie Zhao, E. Fioravanti, J. L. Zhang, A. Q. Guo, W. D. Li, O. Cakir, Krisztian Peters, X. H. Liu, L. Q. Qin, Y. Hu, J. Min, Q. M. Ma, M. Z. Wang, Q. A. Malik, Xichao Ruan, W. C. Yan, H. B. Liu, J. Q. Zhang, H. H. Zhang, W. L. Yuan, Z. J. Sun, H. Loehner, Q. Ouyang, Magnus Wolke, Y. K. Heng, Fang Liu, B. Kopf, Zhiqiang Liu, Y. F. Liang, Jianping Zheng, W. M. Song, I. Denysenko, D. X. Lin, Alexey Zhemchugov, H. M. Hu, X. N. Li, D. Xiao, M. N. Achasov, F. H. Liu, K. L. He, S. W. Han, S. S. Fang, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Q. W. Zhao, C. Z. Yuan, L. P. Zhou, Z. H. Wang, Y. B. Liu, S. Zhu, J. P. Dai, D. P. Jin, X. Y. Niu, Y. P. Guo, X. C. Chen, Haiping Peng, B. Y. Zhang, M. H. Gu, M. Lv, F. A. Harris, H. Y. Sheng, Jimin Zhao, G. Li, S. X. Du, Z. P. Mao, Y. Yuan, Z. H. Qin, Y. S. Zhu, H. P. Cheng, N. Qin, C. F. Redmer, R. Q. Lu, Zhiqing Liu, Serkant Ali Cetin, J. W. Zhang, Xiaocong Ai, J. Fang, Tao Li, C. D. Fu, Z. P. Zhang, C. Q. Feng, X. R. Chen, Y. Q. Wang, I. Tapan, M. G. Zhao, Y. H. Yang, T. Johansson, J. F. Chang, Y. H. Yan, Q. Liu, J. S. Huang, C. Geng, C. X. Liu, I. Uman, J. J. Zhang, M. Destefanis, J. B. Jiao, C. X. Yu, Z. Y. Deng, M. Ripka, X. T. Huang, G. Rong, D. W. Bennett, Zujian Wang, J. W. Zhao, X. H. Mo, L. S. Wang, D. Cronin-Hennessy, Y. C. Zhu, J. M. Bian, S. J. Zhao, H. P. Huang, O. B. Kolcu, L. L. Ma, Xingguo Li, H. Liang, W. Lai, X. Cai, M. Ullrich, Z. J. Xiao, L. G. Xia, A. Amoroso, B. Zheng, R. G. Ping, R. Kliemt, X. K. Chu, L. L. Wang, H. Cai, Q. J. Xu, C. Dong, S. Sosio, J. C. Chen, Xuanhong Lou, L. H. Wu, X. Q. Hao, A. Dbeyssi, M. Savrie, K. Goetzen, Nasser Kalantar-Nayestanaki, Jie Yu, T. Held, Mario Greco, C. Morales Morales, M. Kornicer, Tobias Weber, G. X. Sun, J. V. Bennett, Li Yan, A. Julin, T. J. Min, K. J. Zhu, P. Larin, Z. Jiao, D. H. Zhang, G. Cibinetto, Peilian Liu, Lingxuan Zhang, Qun-Yao Wang, C. Hu, X. Tang, Z. A. Liu, Huan Ren, G. F. Xu, S. Jin, K. Moriya, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, Y. Guo, X. Y. Song, X. R. Zhou, and Cheng Li

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Quark model, Particle Data Group, Quarkonium, 01 natural sciences, Nuclear physics, Isospin, 0103 physical sciences, Mass spectrum, Invariant mass, 010306 general physics, Storage ring
Abstract

Using a data sample of 106 million ψ(3686) events collected with the BESIII detector operated at the BEPCII storage ring, we study for the first time the decays χcJ→ϕKS0K±π∓ and χcJ→ϕK+K-π0 in the E1 radiative transition ψ(3686)→γχcJ. The decays are dominated by the three-body decay χcJ→ϕK*(892)K¯. We measure branching fractions for this reaction via the neutral and charged K*(892) and find them consistent with each other within the expectation of isospin symmetry. In the KK¯π invariant mass distribution, a structure near the K*(892)K¯ mass threshold is observed, and the corresponding mass and width are measured to be 1412±4(stat)±8(sys) MeV/c2 and Γ=84±12(stat)±40(sys) MeV, respectively. The observed state favors an assignment to the h1(1380), considering its possible JPC and comparing its mass, width and decay mode to those reported in the Particle Data Group.

Published
2015

23. Measurement of thee+e−→ηJ/ψcross section and search fore+e−→π0J/ψat center-of-mass energies between 3.810 and 4.600 GeV

Author

Y. B. Chen, S. B. Liu, L. B. Guo, D. H. Wei, R. G. Ping, O. Bondarenko, G. S. Huang, Z. G. Wang, K. Peters, S. Han, M. Savrie, X. Y. Gao, T. Weber, J. F. Sun, C. F. Redmer, M. Ablikim, H. Y. Zhang, Haiwen Liu, H. P. Huang, Y. J. Mo, Y. J. Sun, S. Ma, Kai Liu, S. S. Sun, X. H. Mo, X. M. Li, K. Zhang, X. N. Ma, L. S. Wang, Y. T. Liang, Z. Haddadi, L. Yang, I. Denysenko, H. S. Chen, J. H. Yin, K. H. Rashid, X. K. Zhou, J. S. Lange, J. Y. Zhang, U. Wiedner, D. Toth, S. Marcello, J. P. Dai, G. Chen, I. Uman, Y. P. Guo, C. F. Qiao, F. F. An, Y. Huang, F. C. Ma, E. Fioravanti, X. P. Xu, Y. B. Zhao, Lei Li, W. X. Gong, Q. Liu, Q. J. Xu, X. K. Chu, H. B. Liu, B. X. Yu, Q. P. Ji, G. R. Liao, F. Feldbauer, J. Q. Zhang, W. D. Li, D. Dedovich, W. L. Yuan, H. H. Zhang, M. Ullrich, M. Fritsch, X. L. Li, G. S. Varner, M. X. Luo, S. S. Fang, X. L. Kang, Q. W. Zhao, J. S. Huang, Z. J. Sun, Y. F. Wang, K. Moriya, Ling Zhao, M. H. Ye, R. E. Mitchell, S. H. Zhang, Yun-Zhi Zhang, Wei Li, L. Fava, F. E. Maas, M. Kavatsyuk, Y. F. Liang, S. J. Zhao, X. D. Ruan, M. Ripka, T. Luo, G. X. Sun, Xiaofeng Zhu, J. Z. Zhang, Z. B. Li, W. Kuehn, Y. Ding, Jin Li, A. Sarantsev, I. Garzia, H. L. Dai, M. Tiemens, P. Weidenkaff, L. D. Liu, O. Cakir, B. Y. Zhang, F. A. Harris, E. H. Thorndike, S. Pacetti, D. W. Bennett, D. Bettoni, G. F. Cao, J. L. Zhang, Zujian Wang, M. Greco, P. Patteri, C. H. Li, A. A. Zafar, M. H. Gu, O. B. Kolcu, J. Zhuang, Xiao-Hai Liu, T. C. Zhao, M. Destefanis, B. Zhong, Z. Jiao, M. Ye, Y. Yuan, J. P. Liu, W. J. Zheng, S. L. Niu, L. L. Ma, X. Q. Li, M. Pelizaeus, R. Kliemt, W. Gradl, J. G. Messchendorp, J. C. Chen, Y. Nefedov, C. L. Luo, M. G. Zhao, P. X. Shen, Zhigang Wang, Y. P. Lu, C. Geng, Qiunan Xu, F. Nerling, A. Zallo, M. Lv, Jie Yu, X. C. Lou, X. L. Ji, D. M. Li, M. Bertani, L. W. Jiang, Bibo Ke, X. Fang, J. H. Zou, Jia-ju Zhang, Magnus Wolke, S. Jin, T. Hussain, L. Yan, P. L. Wang, W. M. Song, J. G. Lu, G. Rong, M. N. Achasov, Zhiqing Zhang, A. Amoroso, S. Schumann, J. M. Bian, X. Y. Song, G. F. Xu, X. F. Wang, K. Y. Liu, D. P. Jin, Z. P. Zhang, Zhenyu Zhang, T. J. Min, W. Lai, J. B. Wei, Giulietto Felici, G. Zhao, Yao Wang, Tord Johansson, C. P. Shen, Y. B. Liu, H. L. Ma, P. R. Li, H. M. Hu, Y. Gao, X. R. Zhou, Y. T. Zhang, Y. H. Guan, S. L. Olsen, Y. Guo, Zhiqing Liu, J. L. Ping, R. A. Briere, W. P. Wang, R. Poling, Z. Wu, Chi Zhang, Brent J. Liu, C. Leng, Z. G. Zhao, F. Bianchi, X. Y. Zhang, Dayong Wang, N. Qin, P. L. Liu, W. C. Yan, X. L. Luo, X. S. Jiang, B. X. Zhang, Qun-Yao Wang, K. Li, Fang Liu, Lei Zhou, O. Albayrak, J. W. Zhao, J. Fang, Lei Xu, L. H. Wu, Lei Zhao, Z. Y. He, Sai-Juan Chen, W. B. Yan, Yang Yang, E. Boger, A. Denig, S. Zhu, C. Dong, S. Sosio, A. Dbeyssi, LiLi Zhang, D. Y. Wang, J. Min, C. Morales Morales, Y. C. Zhu, K. Wang, N. Kalantar-Nayestanaki, T. Ma, K. Goetzen, I. Boyko, H. P. Peng, D. H. Zhang, K. L. He, H. X. Yang, X. S. Kang, Heng-Yun Ye, V. Santoro, Y. H. Zhang, M. Y. Dong, Y. J. Mao, J. F. Chang, Z. A. Zhu, J. Z. Bai, Z. L. Hou, Jimin Zhao, Andrzej Kupsc, Fu-Hu Liu, C. Q. Feng, Yi-Ming Hu, X. Q. Hao, H. Liang, R. Q. Lu, Z. Y. Wang, X. Tang, J. F. Hu, Feng Liu, S. Qian, H. Cai, W. Shan, X. Y. Zhou, Y. X. Yang, S. Spataro, Y. T. Gu, Y. Q. Wang, A. Hafner, Yulei Han, Qiang Zhao, S. Nisar, Y. Z. Sun, A. Julin, Xiang Zhou, C. J. Tang, D. X. Lin, Y. Ban, X. Y. Niu, I. Tapan, Z. A. Liu, F. De Mori, Z. J. Xiao, D. Xiao, B. Zheng, Q. L. Xiu, Z. T. Sun, H. B. Li, L. Y. Dong, Q. Gao, G. Li, Yuehong Xie, Z. Y. Deng, J. Z. Fan, A. Zhemchugov, B. Kloss, Y. S. Zhu, J. P. Zheng, Q. Ouyang, C. X. Yu, Yaquan Fang, K. Schoenning, X. S. Qin, I. B. Nikolaev, L. G. Xia, Jianhao Zhang, Q. A. Malik, Zhiqiang Liu, L. Q. Qin, H. J. Lu, X. Cai, H. P. Cheng, Tao Li, Ch. Rosner, Xiao-Rui Lyu, X. Y. Ma, Y. K. Heng, M. Qi, Kejun Zhu, Q. M. Ma, Z. H. Qin, D. J. Ambrose, J. F. Qiu, X. Liu, Y. H. Zheng, Xiaocong Ai, A. Yuncu, B. S. Zou, C. D. Fu, Serkant Ali Cetin, Li Zhou, X. R. Chen, T. Hu, M. Albrecht, Jianmin Dong, Z. Ning, L. L. Jiang, Q. An, Y. H. Yan, M. Lara, X. T. Huang, A. Calcaterra, M. Maggiora, D. Cronin-Hennessy, H. Y. Sheng, H. H. Liu, T. Held, J. C. Li, J. V. Bennett, C. X. Liu, M. L. Chen, N. Yu. Muchnoi, Y. Xia, G. Cibinetto, R. Baldini Ferroli, Z. P. Mao, Y. Zeng, F. Li, S. X. Du, S. P. Wen, X. N. Li, Hai Yu, C. C. Zhang, L. L. Wang, H. Muramatsu, M. Kornicer, Z. Gao, P. F. Duan, B. L. Wang, A. Q. Guo, X. Y. Shen, H. Loehner, Y. N. Pu, S. G. Wang, Jie Zhao, M. Wang, G. M. Huang, Xurong Chen, C. Z. Yuan, B. Kopf, P. Larin, J. B. Jiao, Huan Ren, J. Liu, X. B. Ji, Yang Qin, M. Shao, G. Chelkov, Joachim Pettersson, L. Zotti, Cheng Li, C. Hu, Jie Liu, B. Wang, and K. J. Zhu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, 01 natural sciences, law.invention, Mass enhancement, Nuclear physics, Cross section (physics), law, 0103 physical sciences, High Energy Physics::Experiment, Center of mass, Nuclear Experiment, 010306 general physics, Collider
Abstract

Using data samples collected with the BESIII detector operating at the BEPCII collider at 17 center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of e(+)e(-) -> eta J/psi and pi(0)J/psi The Born cross sections of these two processes are measured at each center-of-mass energy. The measured energy-dependent Born cross section for e(+)e(-) -> eta J/psi shows an enhancement around 4.2 GeV. The measurement is compatible with an earlier measurement by Belle.

Published
2015

24. Measurement of the proton form factor by studyinge+e−→pp¯

Author

M. H. Ye, L. Yan, K. Zhang, P. L. Wang, M. Greco, P. Weidenkaff, J. Y. Liu, M. Lara, L. D. Liu, O. Cakir, K. Peters, C. Leng, Z. T. Sun, Z. A. Liu, S. Pacetti, S. L. Niu, Xiao-Rui Lyu, Z. G. Zhao, Y. P. Lu, H. B. Li, L. Y. Dong, X. Y. Ma, Y. K. Heng, Y. Gao, X. Q. Li, W. Kühn, G. Li, W. P. Wang, Yang Qin, J. H. Zou, F. Bianchi, W. J. Zheng, S. J. Zhao, S. P. Wen, X. R. Zhou, Z. Y. Deng, Cheng Li, Q. Gao, Y. Zhang, J. C. Chen, X. Y. Song, X. N. Ma, Z. H. Wang, X. D. Ruan, Y. Nefedov, D. M. Li, Yuehong Xie, W. D. Li, Y. T. Liang, X. K. Chu, J. Z. Fan, A. Zhemchugov, S. Jin, C. C. Zhang, O. Albayrak, J. W. Zhao, F. C. Ma, C. F. Redmer, Guangshun Huang, Kai Liu, Xiaocong Ai, L. L. Wang, T. Ma, J. Zhuang, J. Z. Bai, M. Shao, K. Y. Liu, Y. J. Mo, G. R. Liao, J. B. Wei, Qun-Yao Wang, H. X. Yang, H. Muramatsu, X. H. Mo, X. S. Kang, T. Luo, LiLi Zhang, M. Kornicer, M. Fritsch, J. Min, Y. J. Mao, M. Kavatsyuk, H. S. Chen, F. F. An, D. Dedovich, T. Weber, Heng-Yun Ye, W. Gradl, Z. Haddadi, L. Yang, Y. H. Zhang, M. Ablikim, I. Denysenko, J. H. Yin, K. H. Rashid, M. Tiemens, Z. Ning, L. L. Jiang, U. Wiedner, B. X. Yu, Q. P. Ji, E. H. Thorndike, G. Chelkov, W. Shan, L. Zotti, R. E. Mitchell, Y. H. Guan, H. P. Huang, Ling Zhao, F. Nerling, D. X. Lin, Z. J. Xiao, Liqing Xu, S. H. Zhang, Z. A. Zhu, Q. An, P. Patteri, Xiao-Hai Liu, C. F. Qiao, Z. Y. Wang, X. Tang, B. Zheng, E. Fioravanti, V. Santoro, H. H. Zhang, S. S. Fang, B. X. Zhang, J. Dong, K. Moriya, Y. N. Pu, C. P. Shen, Y. B. Liu, J. F. Hu, Lei Zhao, X. Y. Shen, Z. Y. He, S. G. Wang, H. L. Ma, Y. Q. Wang, Yang Yang, Z. J. Sun, Y. F. Wang, A. Denig, D. Y. Wang, M. Ripka, A. Zallo, X. L. Kang, L. Fava, F. E. Maas, Y. F. Liang, H. L. Dai, G. F. Xu, X. F. Wang, Y. B. Chen, S. B. Liu, L. B. Guo, D. H. Wei, H. Loehner, Jin Li, F. Feldbauer, S. Nisar, Q. W. Zhao, C. J. Tang, Y. Hu, X. Liu, Jie Zhao, S. Schumann, X. Y. Zhang, S. Spataro, I. Tapan, Sai-Juan Chen, X. C. Chen, T. Hussain, H. H. Liu, L. H. Wu, J. C. Li, Y. Guo, Y. X. Yang, Y. H. Zheng, Magnus Wolke, Yao Wang, B. Wang, W. B. Yan, F. A. Harris, A. A. Zafar, M. H. Gu, H. W. Yu, X. R. Chen, J. G. Lu, R. G. Ping, M. Wang, D. Xiao, Z. B. Li, C. D. Fu, Serkant Ali Cetin, L. S. Wang, O. Bondarenko, P. X. Shen, Jimin Zhao, J. W. Zhang, Zhiqing Liu, M. Pelizaeus, C. Geng, H. Liang, G. M. Huang, N. Kalantar-Nayestanaki, Chi Zhang, Brent J. Liu, K. Wang, Z. P. Zhang, D. P. Jin, M. Bertani, L. W. Jiang, S. Han, R. Q. Lu, Y. Zeng, Y. Yuan, M. Y. Dong, S. X. Du, H. Cai, A. Hafner, Q. Zhao, T. Johansson, C. H. Li, R. Kliemt, Y. Z. Sun, Z. L. Hou, X. Fang, P. R. Li, Zhiqing Zhang, Xiang Zhou, C. Z. Yuan, Feng Liu, Y. Ban, Jie Yu, Bibo Ke, S. Qian, M. Savrie, Q. L. Xiu, B. Kopf, K. Goetzen, I. Boyko, H. P. Peng, J. L. Ping, M. N. Achasov, P. Larin, T. J. Min, K. J. Zhu, G. Zhao, X. Y. Gao, Giulietto Felici, J. F. Sun, G. Cibinetto, S. L. Olsen, R. A. Briere, R. Poling, S. Ma, S. Marcello, X. Q. Hao, Dayong Wang, N. Qin, H. M. Hu, J. B. Jiao, M. Destefanis, Huan Ren, X. S. Jiang, X. B. Ji, P. L. Liu, X. L. Luo, Xiaofeng Zhu, J. Z. Zhang, D. Toth, Z. Wu, J. P. Dai, K. Li, X. K. Zhou, G. Chen, Y. C. Zhu, I. Uman, Fang Liu, Fu-Hu Liu, C. Q. Feng, M. G. Zhao, Q. J. Xu, Y. J. Sun, S. Zhu, M. Ullrich, S. S. Sun, B. Y. Zhang, D. H. Zhang, Y. P. Guo, K. L. He, J. F. Chang, G. S. Varner, J. M. Bian, Zhenyu Zhang, W. Lai, D. W. Bennett, Zujian Wang, H. B. Liu, Andrzej Kupsc, W. L. Yuan, T. C. Zhao, Y. Huang, J. Q. Zhang, Xuanhong Lou, Z. Jiao, C. L. Luo, C. Morales Morales, Z. G. Wang, H. Y. Zhang, J. S. Lange, J. Y. Zhang, M. X. Luo, J. S. Huang, F. De Mori, X. Y. Zhou, B. Kloss, X. Y. Niu, Y. S. Zhu, J. P. Zheng, Q. Ouyang, C. X. Yu, A. Sarantsev, G. F. Cao, L. L. Ma, A. Amoroso, A. Dbeyssi, Y. T. Gu, A. Julin, Y. H. Yan, J. V. Bennett, C. X. Liu, M. L. Chen, N. Yu. Muchnoi, Y. Xia, X. T. Huang, A. Calcaterra, M. Maggiora, D. Cronin-Hennessy, H. Y. Sheng, J. H. Liu, W. C. Yan, T. Held, Zhiqiang Liu, L. Q. Qin, D. J. Ambrose, L. P. Zhou, P. F. Duan, H. J. Lu, B. L. Wang, W. G. Li, X. M. Li, X. P. Xu, M. Albrecht, Y. B. Zhao, Lei Li, H. M. Liu, W. X. Gong, Q. Liu, X. Cai, H. P. Cheng, A. Q. Guo, G. Rong, W. M. Song, Tao Li, J. Fang, Z. Gao, G. X. Sun, I. Garzia, B. Zhong, J. P. Liu, O. B. Kolcu, R. Baldini Ferroli, J. G. Messchendorp, Qiunan Xu, Z. P. Mao, F. Li, X. N. Li, Yaquan Fang, M. Qi, X. L. Ji, Q. M. Ma, Z. H. Qin, J. F. Qiu, A. Yuncu, B. S. Zou, Li Zhou, K. Schoenning, T. Hu, X. S. Qin, I. B. Nikolaev, L. G. Xia, Q. A. Malik, E. Boger, C. Dong, S. Sosio, Joachim Pettersson, Y. L. Han, X. L. Li, Yunlong Zhang, Y. Ding, D. Bettoni, J. L. Zhang, M. Lv, J. J. Zhang, and C. Hu

Subjects
Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Form factor (quantum field theory), 01 natural sciences, 7. Clean energy, Vertical bar, law.invention, Nuclear physics, Cross section (physics), Distribution (mathematics), law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Nucleon, Collider
Abstract

Using data samples collected with the BESIII detector at the BEPCII collider, we measure the Born cross section of e(+)e(-) -> p (p) over tilde at 12 center-of-mass energies from 2232.4 to 3671.0 MeV. The corresponding effective electromagnetic form factor of the proton is deduced under the assumption that the electric and magnetic form factors are equal (vertical bar G(E)vertical bar = vertical bar G(M)vertical bar). In addition, the ratio of electric to magnetic form factors, vertical bar G(E)/G(M)vertical bar, and vertical bar G(M)vertical bar are extracted by fitting the polar angle distribution of the proton for the data samples with larger statistics, namely at root s = 2232.4 and 2400.0 MeV and a combined sample at root s = 3050.0, 3060.0 and 3080.0 MeV, respectively. The measured cross sections are in agreement with recent results from BABAR, improving the overall uncertainty by about 30%. The vertical bar G(E)/G(M)vertical bar ratios are close to unity and consistent with BABAR results in the same q(2) region, which indicates the data are consistent with the assumption that vertical bar G(E)vertical bar = vertical bar G(M)vertical bar within uncertainties.

Published
2015

25. Observation of the electromagnetic doubly OZI-suppressed decayJ/ψ→ϕπ0

Author

H. B. Liu, J. Q. Zhang, J. M. Bian, Zhenyu Zhang, W. Lai, Yaquan Fang, G. X. Sun, I. Garzia, J. H. Liu, Z. Jiao, C. L. Luo, X. N. Ma, Y. T. Liang, Xuanhong Lou, M. Greco, B. Zhong, J. P. Liu, K. Schoenning, P. F. Duan, C. Morales Morales, M. Fritsch, J. G. Messchendorp, J. P. Dai, G. Chen, B. L. Wang, Z. G. Wang, M. Kavatsyuk, H. Y. Zhang, Y. Yuan, R. Kliemt, Qiunan Xu, Bibo Ke, E. H. Thorndike, X. K. Chu, Y. D. Wang, I. Uman, Jie Yu, Q. J. Xu, J. S. Lange, W. Kühn, T. J. Min, W. D. Li, K. J. Zhu, M. N. Achasov, T. Luo, G. Zhao, M. Tiemens, J. Y. Zhang, P. Patteri, Xiao-Hai Liu, K. Zhang, J. H. Zou, M. Ullrich, F. C. Ma, Giulietto Felici, S. J. Zhao, A. Sarantsev, X. D. Ruan, Sai-Juan Chen, G. F. Cao, L. L. Ma, X. R. Chen, M. X. Luo, K. Wang, A. Amoroso, J. S. Huang, W. G. Li, X. M. Li, X. S. Qin, G. Cibinetto, R. Baldini Ferroli, Xiao-Rui Lyu, X. Y. Song, M. Lara, H. M. Hu, Guangshun Huang, Kai Liu, Q. A. Malik, E. Boger, C. Dong, S. Sosio, Y. P. Lu, X. P. Xu, Y. B. Zhao, M. Y. Dong, Z. L. Hou, Lei Li, X. Fang, H. M. Liu, Z. P. Mao, F. Li, W. X. Gong, Q. Liu, C. Z. Yuan, B. Kopf, I. B. Nikolaev, Feng Liu, Q. P. Ji, H. H. Zhang, S. S. Fang, S. Qian, Z. Wu, K. Li, A. Dbeyssi, Qun-Yao Wang, X. K. Zhou, Fang Liu, LiLi Zhang, Andrzej Kupsc, W. L. Yuan, G. R. Liao, D. J. Ambrose, C. Leng, Z. G. Zhao, F. Nerling, Y. T. Gu, X. N. Li, A. Julin, L. G. Xia, Z. J. Sun, C. P. Shen, Joachim Pettersson, L. S. Wang, N. Kalantar-Nayestanaki, M. H. Ye, J. Min, J. V. Bennett, A. Q. Guo, G. Rong, C. X. Liu, W. M. Song, F. De Mori, Y. B. Liu, H. L. Ma, D. Dedovich, R. E. Mitchell, W. C. Yan, L. Zotti, S. Zhu, B. Y. Zhang, P. Larin, D. H. Zhang, K. L. He, H. Cai, C. Hu, J. Z. Bai, J. F. Chang, Y. H. Guan, F. A. Harris, A. A. Zafar, M. H. Gu, Zhiqiang Liu, L. Q. Qin, M. L. Chen, N. Yu. Muchnoi, O. B. Kolcu, X. Y. Zhou, Y. J. Mao, S. Schumann, M. Albrecht, X. Y. Ma, L. P. Zhou, A. Zallo, Z. Ning, Y. Xia, H. J. Lu, J. B. Jiao, Y. K. Heng, Magnus Wolke, Huan Ren, L. L. Jiang, D. P. Jin, B. X. Zhang, Q. An, Lei Zhao, Z. Y. He, X. Cai, J. Fang, H. P. Cheng, M. Qi, Tao Li, P. Weidenkaff, L. D. Liu, O. Cakir, Yang Yang, A. Denig, Z. Gao, X. B. Ji, X. L. Ji, Dayong Wang, N. Qin, P. L. Liu, X. L. Luo, D. Y. Wang, L. Fava, F. E. Maas, A. Yuncu, Y. F. Liang, Q. M. Ma, H. L. Dai, Z. H. Qin, W. J. Zheng, J. F. Qiu, B. Kloss, T. Hussain, Y. Nefedov, Zhiqing Liu, X. Y. Niu, Yang Qin, H. S. Chen, Y. L. Han, X. L. Li, T. Johansson, Y. H. Yan, D. X. Lin, Z. J. Xiao, X. Liu, S. P. Wen, P. X. Shen, X. H. Mo, M. Bertani, X. T. Huang, A. Calcaterra, M. Maggiora, Yunlong Zhang, D. Cronin-Hennessy, H. Liang, J. H. Yin, K. H. Rashid, L. W. Jiang, Y. S. Zhu, J. P. Zheng, Y. Ding, Q. Ouyang, C. X. Yu, D. Bettoni, H. Y. Sheng, U. Wiedner, B. S. Zou, B. Zheng, Z. T. Sun, Z. A. Liu, Zhiqing Zhang, J. L. Zhang, Y. H. Zheng, Li Zhou, X. Q. Hao, E. Fioravanti, H. B. Li, C. C. Zhang, T. Held, C. D. Fu, M. Lv, T. Hu, X. L. Kang, Serkant Ali Cetin, Q. L. Xiu, Q. W. Zhao, L. L. Wang, L. Y. Dong, G. Li, H. Muramatsu, L. Yan, P. L. Wang, J. J. Zhang, M. Shao, M. Kornicer, X. R. Zhou, Z. Y. Deng, Y. Gao, W. P. Wang, F. Bianchi, Cheng Li, T. Ma, F. Feldbauer, X. Y. Shen, H. Loehner, X. C. Chen, H. H. Liu, J. C. Li, M. Pelizaeus, G. Chelkov, C. Geng, Y. N. Pu, O. Albayrak, J. W. Zhao, H. X. Yang, X. S. Kang, Heng-Yun Ye, V. Santoro, Y. H. Zhang, Y. Zeng, S. X. Du, Z. Y. Wang, X. Tang, S. G. Wang, Jie Zhao, M. Wang, J. Zhuang, Y. J. Sun, J. W. Zhang, G. M. Huang, S. S. Sun, Y. P. Guo, W. Gradl, G. S. Varner, D. W. Bennett, Zujian Wang, T. C. Zhao, G. F. Xu, X. F. Wang, Y. Guo, Z. P. Zhang, P. R. Li, S. Ma, D. Toth, J. L. Ping, Y. Huang, Jin Li, M. Destefanis, M. G. Zhao, Fu-Hu Liu, C. Q. Feng, Y. J. Mo, F. F. An, T. Weber, B. X. Yu, Ling Zhao, Liqing Xu, S. H. Zhang, W. Shan, J. Dong, Y. Q. Wang, S. Nisar, C. J. Tang, Y. Hu, I. Tapan, B. Wang, D. Xiao, J. F. Sun, S. Marcello, S. L. Olsen, X. Y. Zhang, L. H. Wu, K. Peters, R. A. Briere, Xiaofeng Zhu, J. Z. Zhang, W. B. Yan, R. Poling, Jimin Zhao, R. Q. Lu, X. S. Jiang, Z. H. Wang, S. Pacetti, J. C. Chen, J. F. Hu, C. F. Redmer, Xiaocong Ai, Z. Haddadi, L. Yang, I. Denysenko, S. Spataro, M. Ablikim, Y. F. Wang, J. Y. Liu, J. G. Lu, H. P. Huang, M. Ripka, Y. C. Zhu, Y. B. Chen, Chi Zhang, S. B. Liu, L. B. Guo, D. H. Wei, Brent J. Liu, Q. Gao, Y. Zhang, Yuehong Xie, K. Goetzen, J. Z. Fan, A. Zhemchugov, I. Boyko, H. P. Peng, H. W. Yu, R. G. Ping, O. Bondarenko, Z. A. Zhu, S. Han, C. F. Qiao, M. Savrie, X. Y. Gao, Y. X. Yang, K. Moriya, A. Hafner, Q. Zhao, Y. Z. Sun, Xiang Zhou, Y. Ban, Z. B. Li, C. H. Li, S. L. Niu, X. Q. Li, D. M. Li, S. Jin, K. Y. Liu, and J. B. Wei

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, law.invention, Pseudoscalar, Nuclear physics, law, 0103 physical sciences, Mass spectrum, Pi, High Energy Physics::Experiment, Statistical analysis, Nuclear Experiment, 010306 general physics, Collider
Abstract

Using a sample of 1.31 billion J/psi events accumulated with the BESIII detector at the BEPCII collider, we report the observation of the decay J/psi -> phi pi(0), which is the first evidence for a doubly Okubo-Zweig-Iizuka suppressed electromagnetic J/psi decay. A clear structure is observed in the K+K- mass spectrum around 1.02 GeV/c(2), which can be attributed to interference between J/psi -> phi pi(0) and J/psi -> K+K- pi(0) decays. Due to this interference, two possible solutions are found. The corresponding measured values of the branching fraction of J/psi -> phi pi(0) are [2.94 +/- 0.16(stat) +/- 0.16(syst)] x 10(-6) and [1.24 +/- 0.33(stat) +/- 0.30(syst)] x 10(-7).

Published
2015

26. Measurement ofB(ψ(3770)→γχc1)and search forψ(3770)→γχc2

Author

P. L. Wang, J. Z. Bai, L. H. Wu, M. Savrie, Magnus Wolke, Yaquan Fang, M. Greco, X. L. Luo, X. Y. Gao, Y. F. Liang, Bibo Ke, D. P. Jin, G. F. Xu, W. B. Yan, S. Jin, D. J. Ambrose, N. Qin, X. N. Ma, X. L. Ji, Cen Zhang, I. Tapan, Y. H. Yan, J. W. Zhao, D. Cronin-Hennessy, W. P. Wang, F. Bianchi, Y. C. Zhu, M. H. Ye, X. P. Xu, X. B. Ji, M. Tiemens, T. Held, G. R. Liao, S. Pacetti, A. Zallo, G. X. Sun, J. V. Bennett, Li Yan, X. Y. Song, P. Patteri, Xiao-Hai Liu, M. Albrecht, W. D. Li, B. Wang, Z. Y. Zhang, H. J. Lu, J. G. Lu, Y. H. Zheng, Cong-Feng Qiao, O. Albayrak, K. Schoenning, B. S. Zou, Z. Jiao, D. H. Zhang, Q. A. Malik, Z. H. Wang, Y. J. Mo, N. Yu. Muchnoi, Z. G. Wang, L. D. Liu, S. Ma, D. Toth, F. A. Harris, X. Q. Hao, W. C. Yan, L. Y. Dong, X. S. Kang, Heng-Yun Ye, Y. H. Zhang, R. A. Briere, Y. J. Mao, H. X. Yang, Q. Liu, I. Garzia, Tristan Weber, H. Y. Zhang, P. Larin, M. Fritsch, M. Kavatsyuk, Zhiqiang Liu, Z. Ning, M. Y. Dong, Z. P. Zhang, M. Qi, M. N. Achasov, A. Calcaterra, Z. G. Zhao, F. E. Maas, W. J. Zheng, Xiaocong Ai, Andrzej Kupsc, H. S. Chen, S. L. Olsen, L. L. Ma, L. G. Xia, A. Amoroso, G. F. Chen, Y. Q. Wang, M. L. Chen, H. L. Ma, Y. H. Guan, Z. Y. Wang, G. Li, J. S. Huang, D. M. Li, Y. G. Xie, J. H. Zou, J. Y. Zhang, X. T. Huang, S. S. Sun, R. Baldini Ferroli, G. Rong, Xichao Ruan, H. H. Zhang, Z. J. Sun, H. Loehner, H. Muramatsu, M. Pelizaeus, J. P. Liu, C. D. Fu, T. Hu, X. K. Zhou, X. L. Li, X. S. Jiang, C. X. Liu, C. Q. Feng, Huan Ren, H. P. Huang, Yang Qin, X. R. Chen, A. Dbeyssi, Y. X. Xia, L. P. Zhou, H. B. Li, B. Kloss, Z. P. Mao, C. L. Luo, H. P. Cheng, Q. P. Ji, I. R. Boyko, Liqing Xu, S. H. Zhang, I. Uman, S. B. Liu, B. X. Zhang, J. Y. Liu, Z. Y. Deng, M. Ripka, E. H. Thorndike, X. Y. Shen, G. S. Huang, G. A. Chelkov, M. Kornicer, J. Fang, Tao Li, Krisztian Peters, Y. K. Heng, A. A. Zafar, V. Santoro, C. C. Zhang, B. Zhong, L. B. Guo, J. G. Messchendorp, Y. Nefedov, K. Goetzen, R. E. Mitchell, X. H. Liu, L. Q. Qin, Y. Ding, M. Z. Wang, O. Cakir, A. Julin, M. H. Gu, F. De Mori, Lei Li, Dan Wang, M. Ullrich, Z. J. Xiao, B. J. Liu, Fang Liu, M. Maggiora, Ling Zhao, K. H. Rashid, Z. Gao, H. Y. Sheng, X. H. Mo, L. S. Wang, S. L. Niu, Q. Gao, Y. N. Gao, X. Y. Zhou, J. F. Sun, Li Zhou, J. P. Dai, X. C. Chen, Y. Zhang, Shan Wang, Xiao-Rui Lyu, Y. N. Pu, D. W. Bennett, U. Wiedner, Zujian Wang, I. Denysenko, Guangming Huang, P. X. Shen, Z. Wu, R. Kliemt, H. W. Yu, L. W. Jiang, S. Schumann, X. Q. Li, T. Ma, Yanping Huang, Y. T. Liang, M. G. Zhao, Y. H. Yang, X. N. Li, Qiunan Xu, S. Marcello, W. Kühn, C. X. Yu, Manuel Lara, Z. A. Zhu, Lei Zhao, Z. Y. He, Haiping Peng, Z. L. Hou, J. Z. Fan, S. J. Chen, H. H. Liu, Jie Zhao, D. X. Lin, J. C. Li, Jie Yu, L. Zotti, L. L. Jiang, Tao Luo, Y. Zeng, Zhe Sun, Alexey Zhemchugov, H. M. Hu, C. Geng, Zhiqing Zhang, X. F. Wang, L. L. Wang, H. Cai, Yao Wang, K. J. Li, I. B. Nikolaev, J. Zhuang, B. Y. Zhang, M. X. Luo, H. Liang, Q. M. Ma, F. H. Liu, G. S. Varner, W. G. Li, A. G. Denig, J. M. Bian, J. H. Yin, Y. X. Yang, M. Shao, Y. T. Gu, Jian Wei, B. Zheng, D. V. Dedovich, R. G. Ping, B. X. Yu, S. J. Zhao, W. Lai, Y. B. Zhao, W. Shan, T. J. Min, K. J. Zhu, C. P. Shen, Y. B. Chen, J. W. Zhang, Xiaofeng Zhu, J. Z. Zhang, C. Leng, O. Bondarenko, X. M. Li, M. Bertani, K. Y. Liu, J. Dong, Z. B. Li, X. Y. Niu, Z. Haddadi, G. Cibinetto, C. Z. Yuan, L. Yang, Z. A. Liu, E. Fioravanti, S. Spataro, Q. J. Xu, Y. Yuan, Y. S. Zhu, J. C. Chen, Xuanhong Lou, A. Hafner, Zhiqing Liu, Alperen Yuncu, Jin Li, Nasser Kalantar-Nayestanaki, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Q. W. Zhao, S. Nisar, C. J. Tang, Y. Hu, Jiaxi Liu, C. Morales Morales, J. Q. Zhang, Q. Zhao, T. Johansson, J. F. Chang, Y. Z. Sun, Y. P. Lu, X. Fang, W. Gradl, Y. Ban, P. Weidenkaff, H. L. Dai, Y. F. Wang, D. Y. Wang, O. B. Kolcu, J. Min, F. Feldbauer, H. M. Liu, H. B. Liu, D. Xiao, B. Kopf, X. Cai, J. F. Hu, Feng Liu, K. L. He, S. W. Han, M. Ablikim, Ke Wang, Jimin Zhao, T. Hussain, Gang Zhao, G. F. Cao, C. F. Redmer, R. Q. Lu, X. Y. Ma, W. X. Gong, A. Q. Guo, S. P. Wen, X. S. Qin, C. Dong, R. Poling, S. Sosio, P. F. Duan, X. R. Zhou, W. M. Song, Fenfen An, Cheng Li, B. L. Wang, Joachim Pettersson, Y. N. Guo, T. C. Zhao, Y. L. Han, Z. H. Qin, C. H. Li, X. K. Chu, Yunlong Zhang, D. Bettoni, J. L. Zhang, Jianping Zheng, S. Zhu, Peilian Liu, Lingxuan Zhang, Qun-Yao Wang, M. Lv, S. X. Du, J. J. Zhang, M. Destefanis, C. Hu, X. Tang, K. Moriya, F. Li, F. C. Ma, W. L. Yuan, Q. Ouyang, S. S. Fang, Y. B. Liu, G. Felici, J. F. Qiu, L. Fava, F. Nerling, Q. L. Xiu, Y. P. Guo, Serkant Ali Cetin, J. B. Jiao, S. Qian, Q. An, Jialun Ping, K. Zhang, X. Y. Zhang, Y. J. Sun, and E. Boger

Subjects
Combinatorics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, 010306 general physics, 01 natural sciences
Abstract

We report a measurement of the branching fraction for $\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1}$ and search for the transition $\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c2}$ based on $2.92\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ data accumulated at $\sqrt{s}=3.773\text{ }\text{ }\mathrm{GeV}$ with the BESIII detector at the BEPCII collider. We measure $\mathcal{B}(\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1})=(2.48\ifmmode\pm\else\textpm\fi{}0.15\ifmmode\pm\else\textpm\fi{}0.23)\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}3}$, which is the most precise measurement to date. The upper limit on the branching fraction of $\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c2}$ at a 90% confidence level is $\mathcal{B}(\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c2})l0.64\ifmmode\times\else\texttimes\fi{}1{0}^{\ensuremath{-}3}$. The corresponding partial widths are $\mathrm{\ensuremath{\Gamma}}(\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c1})=(67.5\ifmmode\pm\else\textpm\fi{}4.1\ifmmode\pm\else\textpm\fi{}6.7)\text{ }\mathrm{keV}$ and $\mathrm{\ensuremath{\Gamma}}(\ensuremath{\psi}(3770)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\chi}}_{c2})l17.4\text{ }\mathrm{keV}$.

Published
2015

27. Measurements ofψ(3686)→K−ΛΞ¯++c.c.andψ(3686)→γK−ΛΞ¯++c.c

Author

X. L. Ji, Y. N. Pu, E. H. Thorndike, Orhan Cakir, S. L. Olsen, R. A. Briere, L. Q. Qin, Talib Hussain, X. S. Jiang, F. Feldbauer, M. H. Gu, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, Y. B. Zhao, W. Shan, X. C. Chen, J. B. Jiao, J. F. Sun, A. Yuncu, J. Dong, H. Y. Sheng, S. Marcello, Y. Zeng, C. Geng, J. W. Zhang, Y. Q. Wang, M. Bertani, C. X. Yu, Y. G. Xie, Li Zhou, H. X. Yang, I. Garzia, S. Nisar, S. Han, C. J. Tang, Z. Haddadi, L. Yang, S. X. Du, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, B. Zheng, R. G. Ping, Z. T. Sun, Z. A. Liu, X. H. Mo, L. S. Wang, Y. Hu, Y. P. Lu, M. H. Ye, L. H. Wu, Y. F. Wang, Y. Ban, J. P. Liu, P. Weidenkaff, L. L. Wang, M. Savrie, Y. H. Zheng, H. Cai, Cong-Feng Qiao, O. Albayrak, S. P. Wen, N. Yu. Muchnoi, X. S. Qin, X. S. Kang, Heng-Yun Ye, V. Santoro, Y. H. Zhang, X. R. Zhou, W. C. Yan, M. Maggiora, Ling Zhao, Z. Y. Wang, Cheng Li, X. Y. Gao, B. Wang, D. Xiao, X. Y. Ma, W. X. Gong, S. Qian, Jialun Ping, K. Goetzen, K. Zhang, J. G. Messchendorp, J. P. Dai, Qiunan Xu, J. M. Bian, Zhenyu Zhang, S. J. Zhao, W. Lai, X. K. Chu, Y. D. Wang, X. Y. Zhang, A. Zallo, Z. Ning, Bibo Ke, Zhiqiang Liu, W. Gradl, Shan Wang, Xiao-Rui Lyu, M. Ripka, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, M. Lara, H. H. Liu, J. C. Li, L. D. Liu, Tao Luo, H. L. Ma, C. Leng, Y. J. Sun, D. M. Li, L. Y. Dong, C. H. Li, Yang Qin, W. B. Yan, M. N. Achasov, D. Y. Wang, H. Muramatsu, Y. P. Guo, G. S. Varner, Peilian Liu, J. Zhuang, Y. X. Xia, M. X. Luo, I. Uman, Giulietto Felici, Lingxuan Zhang, Z. H. Wang, Qun-Yao Wang, L. P. Zhou, L. Zotti, S. L. Niu, Jian Wei, Yucheng Huang, D. J. Ambrose, W. G. Li, X. Q. Li, M. Greco, W. J. Zheng, S. Pacetti, Z. P. Zhang, X. M. Li, D. V. Dedovich, M. Pelizaeus, J. Min, C. F. Redmer, Xiaocong Ai, Y. H. Guan, B. X. Yu, S. Ma, D. Toth, Chi Zhang, S. Spataro, X. P. Xu, X. Liu, Z. P. Mao, X. T. Huang, C. Hu, A. A. Zafar, S. Schumann, D. W. Bennett, Zujian Wang, X. Tang, Y. J. Mao, C. Z. Yuan, I. B. Nikolaev, Z. J. Xiao, Lei Li, Kai Liu, G. Rong, H. P. Huang, H. M. Liu, B. Kopf, J. C. Chen, J. H. Yin, K. H. Rashid, M. Albrecht, J. S. Huang, K. Li, Xuanhong Lou, X. K. Zhou, J. Y. Liu, Fang Liu, H. B. Li, M. Shao, Y. T. Gu, H. P. Cheng, A. G. Denig, Serkant Ali Cetin, K. L. He, C. L. Luo, Y. J. Mo, Krisztian Peters, K. Y. Liu, C. X. Liu, W. D. Li, Z. B. Li, Q. Ouyang, G. F. Cao, I. Denysenko, M. Ullrich, P. R. Li, E. Fioravanti, Nasser Kalantar-Nayestanaki, J. Fang, Tao Li, C. C. Zhang, M. Z. Wang, B. Zhong, L. B. Guo, Y. Nefedov, J. Q. Zhang, P. L. Wang, H. S. Chen, B. Y. Zhang, Z. Gao, Jimin Zhao, X. L. Kang, A. Sarantsev, D. H. Wei, Ulrich Wiedner, J. S. Lange, Q. W. Zhao, Guangshun Huang, Q. Gao, G. F. Xu, S. Jin, S. S. Fang, Y. B. Liu, Y. N. Gao, Y. Zhang, Q. An, J. Z. Fan, H. L. Dai, Igor Boyko, H. W. Yu, C. Morales Morales, Jin Li, G. X. Sun, J. V. Bennett, Li Yan, Y. Guo, S. J. Chen, A. Q. Guo, W. M. Song, J. H. Liu, G. R. Liao, J. F. Hu, I. Tapan, Y. H. Yan, J. W. Zhao, M. Y. Dong, Z. Jiao, Fu-Hu Liu, X. Fang, T. Ma, D. H. Zhang, H. B. Liu, O. Bondarenko, X. Y. Song, Ke Wang, Y. X. Yang, D. Cronin-Hennessy, Y. C. Zhu, P. Larin, Huan Ren, T. Weber, A. Calcaterra, Z. G. Zhao, J. H. Zou, H. H. Zhang, G. A. Chelkov, F. Li, Feng Liu, Zhiqing Liu, T. Johansson, J. F. Chang, S. S. Sun, E. Boger, M. G. Zhao, O. B. Kolcu, Z. J. Sun, H. Loehner, T. Held, K. J. Zhu, F. C. Ma, Q. L. Xiu, Yaquan Fang, M. Ablikim, R. Poling, R. Q. Lu, M. Qi, R. E. Mitchell, A. Hafner, Q. Zhao, Z. G. Wang, X. L. Luo, H. Y. Zhang, Q. P. Ji, Y. Z. Sun, J. F. Qiu, Z. H. Qin, L. Fava, W. P. Wang, P. F. Duan, X. N. Ma, F. Bianchi, F. Nerling, Y. T. Liang, Liqing Xu, S. H. Zhang, X. Y. Shen, G. F. Chen, J. Y. Zhang, Fenfen An, K. Moriya, M. Fritsch, Xiang Zhou, Y. Ding, M. Kavatsyuk, B. L. Wang, B. J. Liu, Y. K. Heng, W. Kühn, T. C. Zhao, B. X. Zhang, Z. A. Zhu, Y. L. Han, Gang Zhao, Andrzej Kupsc, X. Cai, C. P. Shen, K. Schoenning, B. S. Zou, W. L. Yuan, Yunlong Zhang, G. Cibinetto, R. Baldini Ferroli, X. Q. Hao, M. L. Chen, Q. J. Xu, D. Bettoni, HongSheng Zhao, J. L. Zhang, X. N. Li, Haiping Peng, L. L. Jiang, Jianping Zheng, S. Zhu, H. Liang, F. A. Harris, M. Lv, S. B. Liu, J. J. Zhang, M. Destefanis, Magnus Wolke, Y. F. Liang, D. P. Jin, Q. A. Malik, C. Dong, S. Sosio, Dayong Wang, N. Qin, Joachim Pettersson, H. J. Lu, J. G. Lu, F. E. Maas, T. Hu, Guangming Huang, P. X. Shen, Z. Wu, L. W. Jiang, Zhiqing Zhang, Xiangdong Ruan, Q. Liu, L. L. Ma, L. G. Xia, A. Amoroso, R. Kliemt, A. Dbeyssi, M. Kornicer, Jie Yu, A. Julin, F. De Mori, T. J. Min, X. Y. Zhou, J. Z. Bai, X. F. Wang, Q. M. Ma, B. Kloss, X. Y. Niu, Y. Yuan, Y. S. Zhu, X. B. Ji, M. Tiemens, P. Patteri, Xiao-Hai Liu, G. Li, C. D. Fu, C. Q. Feng, X. R. Chen, Z. Y. Deng, and Xingguo Li

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Mass spectrum, Analytical chemistry, High Energy Physics::Experiment, Statistical analysis, Atomic physics, 010306 general physics, Lambda, 01 natural sciences
Abstract

Using a sample of 1.06 x 10(8) psi(3686) events produced in e(+)e(-) collisions at root s = 3.686 GeV and collected with the BESIII detector at the BEPCII collider, we present studies of the decays psi(3686) -> K-Lambda(Xi) over bar (+) + c.c. and psi(3686) -> gamma K-Lambda(Xi) over bar (+) + c.c. We observe two hyperons, Xi(1690)(-) and Xi(1820)(-), in the K-Lambda invariant mass distribution in the decay psi(3686) -> K-Lambda(Xi) over bar (+) + c.c. with significances of 4.9 sigma and 6.2 sigma, respectively. The branching fractions of psi(3686) -> K-Lambda(Xi) over bar (+) + c.c., psi(3686) -> K-Sigma(0)(Xi) over bar (+) + c.c, psi(3686) -> gamma chi cJ -> gamma K-Lambda(Xi) over bar (+) + c.c (J = 0, 1, 2), and psi(3686) -> Xi(1690/1820)(-)(Xi) over bar (+) + c.c with sub-sequent decay Xi(1690/1820)(-) -> K-Lambda are measured for the first time.

Published
2015

28. Study ofJ/ψ→ηϕπ+π−at BESIII

Author

L. Yang, Bibo Ke, W. B. Yan, G. Li, Y. H. Guan, Andrzej Kupsc, M. L. Chen, M. Maggiora, Ling Zhao, X. K. Chu, G. R. Liao, M. G. Zhao, Y. H. Yang, C. D. Fu, C. Q. Feng, X. R. Chen, H. L. Ma, Lei Zhao, Z. Y. He, Z. L. Hou, H. B. Li, Z. Y. Deng, M. Ripka, B. Kloss, W. Gradl, A. A. Zafar, Y. F. Wang, C. L. Luo, D. M. Li, S. Pacetti, H. Muramatsu, G. Felici, D. J. Ambrose, S. B. Liu, T. Hussain, X. L. Ji, C. C. Zhang, D. Y. Wang, B. Zhong, L. B. Guo, Y. Nefedov, Peilian Liu, K. H. Rashid, C. Z. Yuan, S. Qian, Q. An, Jialun Ping, Q. Liu, Tristan Weber, X. Fang, H. W. Yu, Y. T. Liang, J. M. Bian, S. J. Zhao, W. Lai, X. Y. Ma, W. X. Gong, M. Pelizaeus, K. Zhang, Zhiqing Liu, J. Z. Bai, J. Y. Liu, Lingxuan Zhang, L. L. Ma, J. Min, H. B. Liu, M. Albrecht, X. Y. Zhang, G. F. Xu, Qun-Yao Wang, S. J. Chen, S. Jin, Y. J. Mao, B. Kopf, L. G. Xia, A. Amoroso, K. J. Li, H. X. Yang, T. Ma, Yanping Huang, T. Johansson, J. F. Chang, G. X. Sun, J. V. Bennett, Li Yan, X. P. Xu, X. B. Ji, M. Tiemens, H. H. Liu, Z. Y. Zhang, O. B. Kolcu, K. L. He, J. C. Li, Y. G. Xie, Z. Jiao, P. Patteri, D. H. Zhang, I. Garzia, Q. Gao, Y. N. Gao, S. W. Han, Y. J. Sun, E. Boger, Xiao-Hai Liu, Q. J. Xu, A. Dbeyssi, Tao Luo, Y. Zhang, C. H. Li, J. Zhuang, W. D. Li, M. H. Ye, X. Cai, Y. L. Han, J. C. Chen, M. X. Luo, Xichao Ruan, Jimin Zhao, X. Y. Song, P. L. Wang, Jian Wei, D. V. Dedovich, M. Kornicer, J. Z. Fan, M. H. Gu, Xuanhong Lou, S. L. Niu, Z. H. Wang, R. Kliemt, Y. P. Lu, F. Feldbauer, Feng Liu, M. Ablikim, C. F. Redmer, R. Q. Lu, I. Uman, M. Ullrich, Z. J. Xiao, A. Julin, Li Zhou, H. Y. Sheng, L. Y. Dong, F. De Mori, Jie Yu, I. Tapan, Jiaxi Liu, Magnus Wolke, Nasser Kalantar-Nayestanaki, Y. F. Liang, Y. H. Yan, D. P. Jin, Shan Wang, Xiao-Rui Lyu, M. Qi, J. W. Zhao, G. A. Chelkov, J. P. Liu, K. Goetzen, W. Kuehn, N. Qin, X. Q. Li, D. Bettoni, Y. X. Yang, C. X. Yu, X. Y. Zhou, D. Cronin-Hennessy, T. J. Min, K. J. Zhu, L. L. Jiang, Xiaocong Ai, Y. C. Zhu, O. Bondarenko, G. Cibinetto, D. W. Bennett, Zujian Wang, C. Morales Morales, J. Q. Zhang, J. L. Zhang, B. Zheng, J. G. Messchendorp, R. G. Ping, Y. Q. Wang, G. S. Varner, M. R. Shepherd, S. Schumann, Z. A. Liu, Y. H. Zheng, A. Calcaterra, Z. G. Zhao, Z. G. Wang, Cong-Feng Qiao, B. X. Yu, T. Held, W. J. Zheng, H. J. Lu, J. G. Lu, A. Hafner, Y. J. Mo, X. F. Wang, Q. Zhao, Yao Wang, Qiunan Xu, F. A. Harris, Y. Z. Sun, H. Y. Zhang, H. H. Zhang, O. Albayrak, X. T. Huang, Jianping Zheng, S. Zhu, Y. Ban, P. Weidenkaff, Z. J. Sun, H. Loehner, F. E. Maas, L. D. Liu, Q. M. Ma, H. S. Chen, S. Ma, Z. Ning, T. Hu, D. Toth, W. G. Li, A. G. Denig, Z. P. Zhang, N. Yu. Muchnoi, G. Rong, H. P. Huang, Y. B. Zhao, K. Y. Liu, X. L. Li, Gang Zhao, F. Li, S. P. Wen, W. Shan, W. L. Yuan, Q. Ouyang, X. S. Qin, X. R. Zhou, J. Dong, X. Y. Niu, X. M. Li, F. C. Ma, Y. Yuan, Y. S. Zhu, X. S. Kang, Heng-Yun Ye, Z. B. Li, Cheng Li, Y. H. Zhang, Q. P. Ji, G. F. Chen, S. S. Fang, M. Lv, S. X. Du, X. N. Ma, I. R. Boyko, J. S. Huang, S. Spataro, X. K. Zhou, A. Zallo, S. Nisar, C. X. Liu, X. H. Mo, L. S. Wang, C. J. Tang, Y. P. Guo, Y. Hu, Liqing Xu, S. H. Zhang, X. Y. Shen, Guangming Huang, T. Guo, P. X. Shen, Alperen Yuncu, J. Y. Zhang, Y. B. Liu, V. Santoro, Jin Li, Z. Wu, S. L. Olsen, Y. Ding, L. L. Wang, H. Cai, L. W. Jiang, Serkant Ali Cetin, L. H. Wu, B. J. Liu, H. L. Dai, J. F. Qiu, J. J. Zhang, H. M. Liu, L. Fava, Zhiqing Zhang, D. Xiao, Z. Y. Wang, I. B. Nikolaev, M. Savrie, M. Destefanis, J. F. Hu, F. Nerling, X. L. Luo, R. A. Briere, Z. A. Zhu, G. F. Cao, J. B. Jiao, J. H. Yin, M. Shao, Y. T. Gu, C. P. Shen, Y. K. Heng, A. Q. Guo, B. Spruck, E. H. Thorndike, R. Baldini Ferroli, C. Hu, E. Fioravanti, X. S. Jiang, Krisztian Peters, W. M. Song, X. Tang, M. Z. Wang, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, X. H. Liu, L. Q. Qin, J. S. Lange, Q. W. Zhao, X. N. Li, Haiping Peng, Ke Wang, W. P. Wang, F. Bianchi, Z. H. Qin, J. P. Dai, Chuan Liu, P. Larin, X. C. Chen, O. Cakir, Huan Ren, Y. N. Pu, Xuantong Zhang, Manuel Lara, Jie Zhao, D. X. Lin, K. Moriya, Alexey Zhemchugov, H. M. Hu, F. H. Liu, J. W. Zhang, M. Y. Dong, C. Dong, S. Sosio, J. H. Zou, S. S. Sun, Y. N. Guo, Yang Qin, R. E. Mitchell, Y. X. Xia, Fang Liu, U. Wiedner, B. Wang, I. Denysenko, M. Fritsch, M. Kavatsyuk, B. Y. Zhang, B. X. Zhang, G. S. Huang, Dan Wang, J. F. Sun, S. Marcello, Y. Zeng, Zhe Sun, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, R. Poling, P. F. Duan, Fenfen An, B. L. Wang, T. C. Zhao, H. Liang, Yaquan Fang, M. Greco, Cen Zhang, K. Schoenning, B. S. Zou, Q. A. Malik, W. C. Yan, Zhiqiang Liu, M. N. Achasov, L. P. Zhou, Z. P. Mao, H. P. Cheng, J. Fang, Tao Li, M. Bertani, and Z. Haddadi

Subjects
Physics, Combinatorics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, Product (mathematics), 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences
Abstract

Based on a sample of $2.25\ifmmode\times\else\texttimes\fi{}{10}^{8}J/\ensuremath{\psi}$ events taken with the BESIII detector at the BEPCII collider, we present the results of a study of the decay $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\eta}\ensuremath{\phi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$. The $Y(2175)$ resonance is observed in the invariant mass spectrum of $\ensuremath{\phi}{f}_{0}(980)$ with a statistical significance of greater than $10\ensuremath{\sigma}$. The corresponding mass and width are determined to be $M=2200\ifmmode\pm\else\textpm\fi{}6(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}5(\mathrm{syst})\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ and $\mathrm{\ensuremath{\Gamma}}=104\ifmmode\pm\else\textpm\fi{}15(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}\phantom{\rule{0ex}{0ex}}15(\mathrm{syst})\text{ }\text{ }\mathrm{MeV}$, respectively, and the product branching fraction is measured to be $\mathcal{B}(J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\eta}Y(2175),\phantom{\rule{0ex}{0ex}}Y(2175)\ensuremath{\rightarrow}\ensuremath{\phi}{f}_{0}(980),{f}_{0}(980)\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}})=(1.20\ifmmode\pm\else\textpm\fi{}0.14(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.37(\mathrm{syst}))\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$. The results are consistent within errors with those of previous experiments. We also measure the branching fraction of $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\phi}{f}_{1}(1285)$ with ${f}_{1}(1285)\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and set upper limits on the branching fractions for $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\phi}\ensuremath{\eta}(1405)/\ensuremath{\phi}X(1835)/\ensuremath{\phi}X(1870)$ with $\ensuremath{\eta}(1405)/X(1835)/X(1870)\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ at the 90% confidence level.

Published
2015

29. Precision measurement of the D*(0) decay branching fractions

Author

Kai Liu, Z. Wu, K. Li, Fang Liu, Lei Zhou, S. Zhu, D. H. Zhang, K. L. He, J. F. Chang, M. Tiemens, H. B. Liu, J. Q. Zhang, Z. Jiao, C. L. Luo, X. L. Ji, Bibo Ke, M. N. Achasov, Giulietto Felici, H. M. Hu, J. P. Dai, G. Chen, I. Uman, Q. J. Xu, M. Ullrich, J. V. Bennett, C. X. Liu, D. J. Ambrose, M. L. Chen, N. Yu. Muchnoi, A. Q. Guo, X. Y. Shen, Y. Xia, Xiaocong Ai, D. Bettoni, H. S. Chen, X. L. Li, Andrzej Kupsc, W. L. Yuan, Y. J. Mo, X. R. Chen, H. Loehner, B. Spruck, H. H. Liu, M. Albrecht, Y. Ding, X. Y. Zhou, R. Baldini Ferroli, J. C. Li, Z. P. Zhang, P. R. Li, Z. Haddadi, F. Feldbauer, L. Yang, J. L. Zhang, F. F. An, T. Weber, A. Zallo, I. Denysenko, S. Ma, Z. P. Mao, F. Li, D. Toth, Magnus Wolke, B. X. Yu, Q. P. Ji, J. F. Hu, J. L. Ping, M. Lv, X. N. Ma, D. P. Jin, L. S. Wang, Y. Zeng, I. Garzia, Ling Zhao, W. M. Song, S. H. Zhang, S. Spataro, S. X. Du, X. N. Li, Y. T. Liang, Y. F. Wang, M. Ripka, S. P. Wen, X. C. Lou, Y. H. Yan, B. Y. Zhang, V. Santoro, M. Greco, S. Pacetti, J. G. Lu, X. T. Huang, Y. Huang, Zhiqing Liu, M. Pelizaeus, Fu-Hu Liu, C. Q. Feng, C. C. Zhang, Dayong Wang, N. Qin, A. Calcaterra, M. Maggiora, P. L. Liu, X. L. Luo, H. Y. Sheng, M. Fritsch, G. Rong, L. L. Wang, W. C. Yan, E. Boger, T. Johansson, S. J. Zhao, W. Shan, Chi Zhang, C. Dong, S. Sosio, X. D. Ruan, H. Muramatsu, Brent J. Liu, M. Kavatsyuk, J. C. Chen, Jingzhou Zhao, T. Held, M. Kornicer, Y. Q. Wang, L. Fava, Yulei Han, F. E. Maas, Qiang Zhao, S. Nisar, C. J. Tang, P. F. Duan, E. H. Thorndike, X. Fang, J. H. Zou, Xiao-Rui Lyu, Y. F. Liang, W. Kuehn, K. Goetzen, Jia-ju Zhang, I. Tapan, I. Boyko, H. P. Peng, Z. A. Liu, O. Albayrak, J. W. Zhao, B. Wang, J. F. Sun, Cheng Li, C. Hu, B. L. Wang, X. Y. Song, D. Xiao, H. L. Dai, Y. J. Sun, Jie Liu, H. X. Yang, X. S. Kang, Heng-Yun Ye, S. S. Sun, S. Marcello, J. Zhuang, Y. B. Chen, S. B. Liu, L. B. Guo, D. H. Wei, E. Fioravanti, Y. H. Zhang, X. R. Zhou, Y. P. Guo, G. S. Varner, X. Y. Zhang, W. Gradl, J. Fang, Chuan Liu, Xiaofeng Zhu, J. Z. Zhang, D. W. Bennett, Zujian Wang, T. C. Zhao, L. Yan, P. L. Wang, H. W. Yu, H. H. Zhang, Z. Y. Wang, X. Tang, Yaquan Fang, L. H. Wu, K. J. Zhu, Xuantong Zhang, W. B. Yan, R. G. Ping, O. Bondarenko, G. S. Huang, X. Y. Ma, Y. K. Heng, S. S. Fang, Z. J. Sun, G. F. Xu, X. F. Wang, X. M. Li, K. Zhang, S. Han, Y. Gao, X. P. Xu, M. Qi, F. A. Harris, K. Schoenning, P. X. Shen, A. A. Zafar, M. H. Gu, Y. H. Guan, Zhigang Wang, M. Bertani, W. P. Wang, F. Bianchi, M. Savrie, Y. Guo, Q. A. Malik, Q. M. Ma, Z. H. Qin, Zhiqiang Liu, Y. B. Zhao, L. W. Jiang, R. Q. Lu, L. Q. Qin, J. F. Qiu, W. D. Li, H. J. Lu, T. Ma, W. X. Gong, Q. Liu, B. X. Zhang, Z. Y. He, K. Peters, X. Cai, A. Yuncu, H. P. Cheng, Tao Li, F. C. Ma, Q. Gao, Zhiqing Zhang, Yuehong Xie, B. S. Zou, T. Luo, Li Zhou, J. Z. Fan, A. Zhemchugov, C. F. Redmer, Yang Yang, A. Denig, D. Y. Wang, T. Hu, P. Patteri, X. S. Qin, H. Liang, Xiao-Hai Liu, I. B. Nikolaev, M. Ablikim, G. X. Sun, H. P. Huang, L. G. 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Subjects
Physics, Nuclear and High Energy Physics, BESIII, детектор, Physics and Astronomy (miscellaneous), Meson, квантовая хромодинамика, Analytical chemistry, FOS: Physical sciences, Branching (polymer chemistry), QCD, 7. Clean energy, MESONS, High Energy Physics - Experiment, NO, Nuclear physics, High Energy Physics - Experiment (hep-ex), бозоны, Pi
Abstract

WOS: 000349437800001, Using 482 pb(-1) of data taken at root s = 4.009 GeV, we measure the branching fractions of the decays of D*(0) into D-0 pi(0) and D-0 gamma to be B(D*(0) -> D-0 pi(0)) = (65.5 +/- 0.8 +/- 0.5)% and B(D*(0) -> D0 gamma) = (34.5 +/- 0.8 +/- 0.5)%, respectively, by assuming that the D*(0) decays only into these two modes. The ratio of the two branching fractions is B(D*(0) -> D-0 pi(0))/B(D*(0) -> D-0 gamma) = 1.90 +/- 0.07 +/- 0.05, which is independent of the assumption made above. The first uncertainties are statistical and the second ones systematic. The precision is improved by a factor of 3 compared to the present world average values., National Key Basic Research Program of China [2015CB856700]; Joint Funds of the National Natural Science Foundation of China [11079008, 11179007, U1232201, U1332201]; National Natural Science Foundation of China (NSFC) [10935007, 11121092, 11125525, 11235011, 11322544, 11335008]; Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS [KJCX2-YW-N29, KJCX2-YW-N45]; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation DFG [Collaborative Research Center CRC-1044]; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey [DPT2006 K-120470]; Russian Foundation for Basic Research [14-07-91152]; U.S. Department of Energy [DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823, DESC0010118]; U.S. National Science Foundation; University of Groningen (RuG); Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea [R32-2008-000-10155-0], The BESIII Collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by the National Key Basic Research Program of China under Contract No. 2015CB856700; Joint Funds of the National Natural Science Foundation of China under Contracts No. 11079008, No. 11179007, No. U1232201, and No. U1332201; National Natural Science Foundation of China (NSFC) under Contracts No. 10935007, No. 11121092, No. 11125525, No. 11235011, No. 11322544, and No. 11335008; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; CAS under Contracts No. KJCX2-YW-N29 and No. KJCX2-YW-N45; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation DFG under Contract No. Collaborative Research Center CRC-1044; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006 K-120470; Russian Foundation for Basic Research under Contract No. 14-07-91152; U.S. Department of Energy under Contracts No. DE-FG02-04ER41291, No. DE-FG02-05ER41374, No. DE-FG02-94ER40823, and No. DESC0010118; U.S. National Science Foundation; University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt; WCU Program of National Research Foundation of Korea under Contract No. R32-2008-000-10155-0.

Published
2015

30. Search for theY(4140)viae+e−→γϕJ/ψats=4.23, 4.26 and 4.36 GeV

Author

S. Han, W. C. Yan, Zhiqiang Liu, L. Q. Qin, L. P. Zhou, H. H. Zhang, S. S. Fang, H. J. Lu, Y. J. Mao, Z. J. Sun, M. Savrie, X. Cai, H. P. Cheng, Tao Li, Y. H. Guan, F. A. Harris, A. A. Zafar, M. H. Gu, J. Y. Liu, B. X. Zhang, F. C. Ma, D. X. Lin, Z. J. Xiao, X. Y. Zhang, H. S. Chen, Y. L. Han, X. L. Li, Lei Zhao, Z. Y. He, Yang Yang, A. Denig, D. Y. Wang, J. F. Hu, H. H. Liu, Zhiqing Liu, Q. Gao, Y. Zhang, J. C. Li, T. Johansson, M. Qi, B. Zheng, L. H. Wu, Yuehong Xie, W. B. Yan, J. Z. Fan, A. Zhemchugov, J. V. Bennett, C. X. Liu, X. L. Ji, Y. Ding, S. Spataro, D. Bettoni, Q. M. Ma, G. X. Sun, A. Zallo, Kai Liu, I. Garzia, J. L. Zhang, X. Liu, Jimin Zhao, X. K. Chu, Z. H. Qin, M. L. Chen, N. Yu. Muchnoi, Y. H. Zheng, Z. G. Wang, Y. X. Yang, J. F. Qiu, X. H. Mo, Y. B. Chen, Magnus Wolke, D. P. Jin, J. F. Sun, F. Nerling, M. Greco, S. B. Liu, L. B. Guo, D. H. Wei, R. Q. Lu, B. Zhong, Y. Xia, H. B. Liu, Sai-Juan Chen, T. Guo, C. D. Fu, Serkant Ali Cetin, B. Spruck, A. Sarantsev, H. Y. Zhang, G. F. Cao, M. R. Shepherd, Yaquan Fang, M. Lv, J. P. Liu, A. Hafner, Q. Zhao, Y. N. Pu, Y. Z. Sun, Y. Zeng, C. P. Shen, S. G. Wang, O. B. Kolcu, S. Marcello, Y. B. Liu, H. L. Ma, A. Yuncu, S. X. Du, W. Shan, J. G. Messchendorp, J. Q. Zhang, S. J. Zhao, Xiang Zhou, Y. Ban, J. H. Yin, K. H. Rashid, Dayong Wang, N. Qin, P. L. Liu, X. L. Luo, J. P. Dai, G. Chen, X. R. Chen, Z. Haddadi, F. Feldbauer, W. Kuehn, L. L. Ma, A. Amoroso, X. D. Ruan, H. W. Yu, R. G. Ping, B. S. Zou, Li Zhou, I. Uman, J. J. Zhang, X. Y. Shen, Q. A. Malik, Guangshun Huang, Q. J. Xu, J. H. Zou, A. Dbeyssi, E. Boger, Xiaofeng Zhu, J. Z. Zhang, C. Dong, S. Sosio, T. Hu, K. Schoenning, U. Wiedner, J. Dong, J. S. Lange, Qun-Yao Wang, Z. Jiao, Y. Q. Wang, C. L. Luo, W. D. Li, X. N. Ma, L. Yang, Y. T. Liang, I. Denysenko, Y. F. Wang, X. S. Qin, M. Ripka, X. Y. Song, P. L. Wang, M. Ullrich, H. Loehner, O. Bondarenko, Y. T. Gu, Jie Zhao, LiLi Zhang, J. Min, I. B. Nikolaev, Q. P. Ji, J. Y. Zhang, S. Pacetti, R. Baldini Ferroli, M. Wang, E. Fioravanti, K. Peters, A. Julin, K. Zhang, M. Lara, M. X. Luo, Z. A. Zhu, F. De Mori, J. G. Lu, Xiao-Rui Lyu, S. Nisar, C. J. Tang, Y. Hu, Y. P. Lu, Z. T. Sun, Z. P. Mao, F. Li, Bibo Ke, Z. A. Liu, X. L. Kang, S. P. Wen, L. G. Xia, J. Zhuang, J. S. Huang, X. C. Chen, M. N. Achasov, M. Pelizaeus, Y. J. Mo, X. Y. Zhou, J. W. Zhang, Z. H. Wang, G. M. Huang, X. N. Li, Q. W. Zhao, H. B. Li, L. Y. Dong, C. Hu, Giulietto Felici, J. C. Chen, X. C. Lou, C. C. Zhang, I. Tapan, J. H. Liu, W. Gradl, Andrzej Kupsc, W. L. Yuan, J. M. Bian, L. L. Wang, Zhenyu Zhang, W. Lai, G. Li, M. Fritsch, C. F. Redmer, Xiaocong Ai, H. Muramatsu, F. F. An, T. Weber, H. M. Hu, Chi Zhang, M. Kornicer, P. F. Duan, S. Ma, X. R. Zhou, Brent J. Liu, D. Toth, Z. Y. Deng, Cheng Li, B. Wang, O. Albayrak, B. X. Yu, J. W. Zhao, B. Kloss, M. Ablikim, B. L. Wang, L. S. Wang, N. Kalantar-Nayestanaki, X. Y. Niu, M. H. Ye, Y. S. Zhu, J. P. Zheng, M. Kavatsyuk, H. P. Huang, H. X. Yang, Ling Zhao, X. S. Kang, Heng-Yun Ye, Yang Qin, Liqing Xu, S. H. Zhang, Q. Ouyang, C. X. Yu, H. Cai, X. Y. Ma, V. Santoro, D. Xiao, Y. H. Zhang, Z. Wu, K. J. Zhu, Y. J. Sun, K. Goetzen, Y. K. Heng, I. Boyko, H. P. Peng, Xuantong Zhang, C. Morales Morales, Y. Huang, E. H. Thorndike, K. Li, Z. Y. Wang, X. Tang, X. K. Zhou, Fang Liu, P. Weidenkaff, M. Shao, L. D. Liu, O. Cakir, Jin Li, S. S. Sun, W. J. Zheng, M. Destefanis, Y. Nefedov, G. Chelkov, Z. Ning, L. L. Jiang, Q. An, Y. P. Guo, C. Z. Yuan, M. G. Zhao, B. Kopf, S. Zhu, P. Larin, G. F. Xu, J. B. Jiao, X. F. Wang, Huan Ren, G. S. Varner, X. B. Ji, B. Y. Zhang, K. Wang, D. H. Zhang, K. L. He, M. Y. Dong, D. W. Bennett, J. F. Chang, Z. L. Hou, X. Fang, Zujian Wang, Y. Guo, T. C. Zhao, Feng Liu, S. Qian, Z. P. Zhang, P. R. Li, J. L. Ping, Fu-Hu Liu, C. Q. Feng, Z. G. Zhao, S. Schumann, Yao Wang, J. Z. Bai, L. Fava, F. E. Maas, Y. F. Liang, H. L. Dai, G. R. Liao, P. X. Shen, M. Bertani, L. W. Jiang, Zhiqing Zhang, D. Dedovich, R. E. Mitchell, T. Hussain, L. Yan, Y. Gao, W. P. Wang, F. Bianchi, T. Luo, T. Ma, M. Tiemens, P. Patteri, Xiao-Hai Liu, Y. Yuan, R. Kliemt, Jie Yu, T. J. Min, G. Zhao, H. Liang, G. Cibinetto, Qiunan Xu, A. Q. Guo, G. Rong, W. M. Song, J. Fang, Chuan Liu, W. G. Li, X. M. Li, X. P. Xu, Y. B. Zhao, H. M. Liu, W. X. Gong, Q. Liu, S. L. Olsen, R. A. Briere, R. Poling, X. S. Jiang, Y. C. Zhu, S. L. Niu, X. Q. Li, D. M. Li, S. Jin, K. Y. Liu, J. B. Wei, C. F. Qiao, K. Moriya, Z. B. Li, C. H. Li, D. J. Ambrose, M. Albrecht, Y. H. Yan, X. T. Huang, A. Calcaterra, M. Maggiora, D. Cronin-Hennessy, H. Y. Sheng, and T. Held

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Theoretical physics, Electron–positron annihilation, Radiative transition, High Energy Physics::Experiment, Storage ring
Abstract

Using data samples collected at center-of-mass energies root s = 4.23, 4.26, and 4.36 GeV with the BESIII detector operating at the BEPCII storage ring, we search for the production of the charmoniumlike state Y(4140) through a radiative transition followed by its decay to phi J/psi. No significant signal is observed and upper limits on sigma[e(+)e(-) -> gamma Y(4140)] . B(Y(4140) -> phi J/psi at the 90% confidence level are estimated as 0.35, 0.28, and 0.33 pb at root s = 4.23, 4.26, and 4.36 GeV, respectively.

Published
2015

31. Search for the weak decays J/ψ→Ds(*)−e+νe+c.c

Author

W. L. Yuan, Y. H. Guan, Kai Liu, I. B. Nikolaev, J. H. Yin, K. H. Rashid, M. Shao, Y. T. Gu, Y. Nefedov, Q. Ouyang, S. S. Fang, Y. B. Liu, S. J. Chen, E. Fioravanti, S. L. Niu, X. Q. Li, C. Hu, B. Spruck, E. H. Thorndike, L. Q. Qin, F. Feldbauer, X. C. Chen, H. B. Li, A. G. Denig, C. L. Luo, C. C. Zhang, B. Zhong, L. B. Guo, Zhiqing Liu, J. F. Sun, A. Q. Guo, X. Tang, Ulrich Wiedner, J. F. Chang, S. Marcello, Y. Zeng, Q. L. Xiu, O. B. Kolcu, O. Bondarenko, Tao Luo, B. X. Yu, H. Liang, T. Ma, Q. P. Ji, S. Qian, Jialun Ping, W. M. Song, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, K. Y. Liu, M. Maggiora, S. Schumann, J. Q. Zhang, Ling Zhao, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, H. S. Chen, Shujun Zhao, H. L. Dai, Igor Boyko, Tord Johansson, X. L. Kang, A. Sarantsev, D. H. Wei, J. S. Lange, P. L. Wang, X. L. Luo, W. P. Wang, F. Bianchi, P. R. Li, B. Wang, X. Cai, K. Zhang, X. Y. Zhang, Q. W. Zhao, Z. T. Sun, Z. A. Liu, M. Lara, Y. J. Sun, D. Y. Wang, K. J. Zhu, Xuantong Zhang, Z. H. Qin, J. Z. Bai, Yao Wang, S. L. Olsen, R. A. Briere, K. Moriya, Yaquan Fang, X. S. Jiang, Y. L. Han, Y. P. Lu, Y. Ban, P. Weidenkaff, S. P. Wen, Chuan Liu, C. Z. Yuan, Y. P. Chu, X. S. Qin, X. R. Zhou, Cheng Li, H. L. Ma, O. Cakir, X. B. Ji, M. Tiemens, K. Schoenning, B. S. Zou, D. M. Li, J. B. Jiao, D. Bettoni, Jin Li, H. Muramatsu, G. X. Sun, J. V. Bennett, Li Yan, P. Patteri, J. L. Zhang, Xiao-Hai Liu, Z. Jiao, Fu-Hu Liu, M. Pelizaeus, Y. X. Yang, J. C. Li, Y. H. Zheng, J. Zhuang, M. G. Zhao, Xuejun Wang, M. X. Luo, Jian Wei, Yucheng Huang, D. V. Dedovich, Cong-Feng Qiao, O. Albayrak, M. R. Shepherd, Chi Zhang, N. Yu. Muchnoi, A. Hafner, Q. Zhao, X. S. Kang, Heng-Yun Ye, Y. Z. Sun, Y. H. Zhang, Xiang Zhou, Jianping Zheng, M. Qi, Gang Zhao, Z. Y. Wang, S. Zhu, H. J. Lu, J. G. Lu, M. Lv, Guangshun Huang, F. E. Maas, T. Hu, H. H. Zhang, G. A. Chelkov, J. J. Zhang, M. Destefanis, D. H. Zhang, Guangming Huang, P. X. Shen, J. H. Liu, Ke Wang, R. Poling, P. F. Duan, Fenfen An, B. L. Wang, T. C. Zhao, Z. Wu, L. W. Jiang, X. L. Ji, A. Calcaterra, Z. G. Zhao, Y. J. Mao, Zhiqing Zhang, J. Y. Liu, Talib Hussain, Z. J. Sun, H. Loehner, S. B. Liu, Q. Gao, Y. N. Gao, M. Bertani, Z. Haddadi, Y. Zhang, Q. An, X. Liu, L. Yang, A. Zallo, J. Z. Fan, Z. J. Xiao, Z. G. Wang, H. Y. Zhang, M. H. Gu, Y. G. Xie, Y. F. Wang, T. Guo, Yang Qin, Li Zhou, Serkant Ali Cetin, G. F. Chen, A. Yuncu, H. Y. Sheng, S. X. Du, J. Y. Zhang, R. Kliemt, W. G. Li, Shan Wang, X. Y. Ma, C. X. Yu, Xiao-Rui Lyu, W. Gradl, M. Ripka, Jie Yu, X. M. Li, Y. X. Xia, H. Moeini, W. X. Gong, Y. K. Heng, S. Spataro, X. P. Xu, J. M. Bian, J. Min, Zhenyu Zhang, W. Lai, G. S. Varner, B. Zheng, Y. B. Zhao, T. J. Min, X. N. Ma, R. G. Ping, H. M. Liu, W. Shan, B. Kopf, Y. T. Liang, J. Dong, J. C. Chen, M. H. Ye, Magnus Wolke, Xuanhong Lou, G. Cibinetto, K. L. He, G. F. Cao, R. Baldini Ferroli, L. D. Liu, L. Y. Dong, Y. Q. Wang, Nasser Kalantar-Nayestanaki, Y. F. Liang, M. Z. Wang, D. P. Jin, W. J. Zheng, G. Li, Jimin Zhao, C. Morales Morales, S. Nisar, F. Nerling, C. H. Li, C. J. Tang, Y. Hu, C. D. Fu, Q. J. Xu, X. K. Chu, C. Q. Feng, R. Q. Lu, Z. B. Li, Z. Y. Deng, X. H. Mo, L. S. Wang, Y. Ding, Dayong Wang, N. Qin, B. J. Liu, L. L. Wang, H. Cai, Xingguo Li, Xiangdong Ruan, Q. Liu, D. Xiao, Z. A. Zhu, M. Kavatsyuk, L. L. Ma, Y. N. Pu, X. N. Li, L. G. Xia, A. Amoroso, C. P. Shen, Q. A. Malik, Haiping Peng, Hai Yu, Andrzej Kupsc, C. Dong, S. Sosio, Lingxuan Zhang, Qun-Yao Wang, B. X. Zhang, Jie Zhao, D. X. Lin, Y. P. Guo, M. L. Chen, Z. P. Zhang, Alexey Zhemchugov, H. M. Hu, D. W. Bennett, Zujian Wang, W. C. Yan, I. Uman, Zhiqiang Liu, J. W. Zhang, M. Kornicer, M. Ullrich, L. P. Zhou, A. Julin, Z. P. Mao, F. De Mori, H. P. Cheng, J. Fang, Tao Li, X. Y. Zhou, S. Han, Y. J. Mo, P. Larin, Huan Ren, L. H. Wu, Q. M. Ma, X. Fang, Feng Liu, M. Savrie, B. Kloss, M. Ablikim, X. Y. Niu, Y. Yuan, Y. S. Zhu, Liqing Xu, S. H. Zhang, X. Y. Shen, V. Santoro, M. Y. Dong, G. F. Xu, S. Jin, Krisztian Peters, H. B. Liu, F. Li, F. C. Ma, J. H. Zou, L. L. Jiang, Y. Guo, G. R. Liao, J. F. Hu, J. F. Qiu, S. S. Sun, L. Fava, X. Y. Song, F. A. Harris, Z. Ning, R. E. Mitchell, Z. H. Wang, Bibo Ke, D. J. Ambrose, W. B. Yan, X. R. Chen, M. Albrecht, W. D. Li, C. F. Redmer, Xiaocong Ai, M. N. Achasov, I. Tapan, Y. H. Yan, J. W. Zhao, D. Cronin-Hennessy, Y. C. Zhu, Giulietto Felici, E. Boger, X. T. Huang, T. Held, Mario Greco, S. Pacetti, A. A. Zafar, G. Rong, H. P. Huang, H. X. Yang, I. Garzia, K. Li, X. K. Zhou, Fang Liu, I. Denysenko, Huihui Liu, B. Y. Zhang, J. P. Liu, J. G. Messchendorp, K. Goetzen, W. Kuehn, J. P. Dai, Qiunan Xu, S. Ma, D. Toth, J. S. Huang, and C. X. Liu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Electron–positron annihilation, High Energy Physics::Experiment, Standard Model
Abstract

Using a sample of 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII collider, we search for the J/psi semileptonic weak decay J/psi -> D-s(-) e(+)nu(e) +c.c. with a much higher sensitivity than previous searches. We also perform the first search for J/psi -> D-s(*-) e(+) nu(e) + c.c. No significant excess of a signal above background is observed in either channel. At the 90% confidence level, the upper limits are determined to be B(J/psi -> D-s(-) e(+) nu(e) + c.c.) D-s*(-) e(+) nu(e) + c.c.) < 1.8 x 10(-6), respectively. Both are consistent with Standard Model predictions.

Published
2014

32. Search forC-parity violation inJ/ψ→γγandγϕ

Author

S. Spataro, X. P. Xu, H. M. Liu, G. F. Cao, H. X. Yang, I. Garzia, Huihui Liu, J. P. Liu, J. G. Messchendorp, Qiunan Xu, A. Q. Guo, W. M. Song, Y. F. Wang, Y. H. Guan, Kai Liu, Z. G. Wang, P. L. Wang, H. B. Li, M. Leyhe, Z. H. Qin, H. Y. Zhang, Chuan Liu, Tao Luo, X. L. Luo, F. Li, A. G. Denig, C. L. Luo, I. B. Nikolaev, F. De Mori, D. J. Ambrose, Y. N. Pu, Z. H. Wang, Y. Nefedov, H. L. Ma, X. Y. Ma, H. Moeini, W. X. Gong, Jie Yu, D. M. Li, G. F. Chen, F. C. Ma, X. Y. Zhou, K. H. Rashid, C. F. Redmer, B. X. Yu, M. Shao, Y. T. Gu, Yaquan Fang, C. C. Zhang, M. H. Gu, W. P. Wang, Chi Zhang, B. Zhong, L. B. Guo, M. Pelizaeus, D. X. Lin, A. Yuncu, H. Y. Sheng, X. L. Ji, F. Bianchi, Y. J. Mao, Q. A. Malik, T. J. Min, K. J. Zhu, Feng Liu, Xiaocong Ai, X. R. Chen, C. X. Yu, Alexey Zhemchugov, H. M. Hu, H. Muramatsu, X. T. Huang, M. Ablikim, A. A. Zafar, G. Rong, H. P. Huang, Ulrich Wiedner, S. Qian, Jialun Ping, X. Y. Zhang, M. Albrecht, H. S. Chen, J. Min, B. Kopf, J. Y. Zhang, O. B. Kolcu, Q. M. Ma, K. Schoenning, B. S. Zou, Q. J. Li, E. Fioravanti, S. L. Olsen, Shujun Zhao, G. A. Chelkov, Talib Hussain, J. F. Sun, J. W. Zhang, M. Lara, Q. Gao, Y. N. Gao, R. A. Briere, T. Ma, B. Zheng, R. G. Ping, H. L. Dai, Igor Boyko, G. Li, Y. K. Heng, K. L. He, W. C. Yan, Y. Zhang, W. D. Li, B. Kloss, C. Dong, S. Sosio, X. Y. Niu, S. Marcello, Y. Zeng, J. F. Qiu, Zhe Sun, X. K. Chu, Y. D. Wang, J. Z. Fan, Zhiqiang Liu, S. Braun, Y. J. Sun, J. M. Bian, Zhenyu Zhang, M. Z. Wang, C. D. Fu, W. Lai, Xurong Chen, Y. Yuan, Y. S. Zhu, X. L. Kang, Y. P. Lu, X. S. Jiang, L. Fava, Jimin Zhao, Y. B. Chen, X. H. Li, Y. X. Yang, J. H. Liu, C. Q. Feng, J. C. Li, L. P. Zhou, Ke Wang, Z. Y. Deng, A. Sarantsev, D. H. Wei, J. S. Lange, Xiaofeng Zhu, J. Z. Zhang, J. Q. Zhang, O. Bondarenko, Xiangdong Ruan, Q. Liu, Q. W. Zhao, S. J. Chen, M. R. Shepherd, Z. P. Mao, Y. T. Liang, J. Zhuang, F. Nerling, Cui Li, R. Q. Lu, Y. G. Xie, M. Bertani, Z. Haddadi, Y. L. Han, Lingxuan Zhang, L. Yang, Krisztian Peters, Xingguo Li, H. P. Cheng, Qun-Yao Wang, Q. Zhao, Y. Z. Sun, Q. L. Xiu, J. Fang, Tao Li, Bibo Ke, J. C. Chen, Xuanhong Lou, D. Bettoni, H. J. Lu, J. G. Lu, M. X. Luo, Jian Wei, L. G. Xia, Z. B. Li, P. Larin, Yucheng Huang, X. Liu, W. B. Yan, J. Z. Bai, Li Zhou, Xiang Zhou, M. N. Achasov, S. X. Du, R. Poling, A. Amoroso, Jianping Zheng, Giulietto Felici, S. Pacetti, D. V. Dedovich, Nasser Kalantar-Nayestanaki, C. Morales Morales, Z. A. Liu, W. L. Yuan, Z. J. Xiao, J. F. Hu, Gang Zhao, F. E. Maas, Huan Ren, S. L. Zang, M. Kavatsyuk, M. Lv, Z. Xue, B. L. Wang, Ke Li, I. Tapan, T. Hu, Y. Ban, P. Weidenkaff, Shan Wang, Xiao-Rui Lyu, J. J. Zhang, H. Liang, Y. H. Yan, O. Cakir, Y. P. Chu, M. Destefanis, X. H. Mo, L. S. Wang, T. C. Zhao, M. Kornicer, A. Zallo, C. Hu, W. Gradl, Q. P. Ji, M. Ripka, Jin Li, Fang Liu, Yang Qin, M. H. Ye, S. P. Wen, X. B. Ji, X. Tang, M. Tiemens, Q. Ouyang, I. Denysenko, B. X. Zhang, A. Julin, P. Patteri, J. W. Zhao, M. Qi, X. S. Qin, X. R. Zhou, Y. X. Xia, Cheng Li, S. S. Fang, D. Cronin-Hennessy, T. Guo, B. Wang, Serkant Ali Cetin, B. Y. Zhang, G. S. Varner, L. L. Wang, H. Cai, Xiao-Hai Liu, Y. B. Liu, Michael Werner, Y. C. Zhu, Xuantong Zhang, G. Cibinetto, R. Baldini Ferroli, K. Moriya, M. G. Zhao, S. L. Niu, M. Y. Dong, S. Schumann, X. Q. Li, H. B. Liu, J. H. Zou, M. Greco, J. B. Jiao, A. Calcaterra, Z. G. Zhao, Q. J. Xu, S. S. Sun, S. B. Liu, Guangming Huang, E. Boger, T. Held, X. N. Li, R. E. Mitchell, Haiping Peng, Hai Yu, Z. J. Sun, H. Loehner, Z. Wu, K. Y. Liu, L. Y. Dong, Tord Johansson, L. W. Jiang, Q. An, Xuejun Wang, Zhiqing Zhang, G. F. Xu, S. Jin, Y. H. Zheng, Cong-Feng Qiao, O. Albayrak, X. Y. Song, S. Ma, N. Yu. Muchnoi, D. Toth, X. S. Kang, Heng-Yun Ye, V. Santoro, Y. H. Zhang, Y. J. Mo, Z. Y. Wang, J. S. Huang, C. X. Liu, B. Spruck, E. H. Thorndike, Liqing Xu, S. H. Zhang, X. Y. Shen, L. Q. Qin, Y. Ding, B. J. Liu, F. Feldbauer, J. P. Dai, Z. A. Zhu, K. Goetzen, W. Kuehn, C. Geng, Y. B. Zhao, W. Shan, C. P. Shen, J. Dong, Y. Q. Wang, S. Nisar, C. J. Tang, L. L. Jiang, F. A. Harris, D. Xiao, Zhiqing Liu, I. Uman, J. F. Chang, Y. P. Guo, Z. P. Zhang, M. Ullrich, D. W. Bennett, Zujian Wang, X. Cai, F. F. An, Z. Ning, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, Fu-Hu Liu, D. H. Zhang, Andrzej Kupsc, M. L. Chen, Magnus Wolke, Y. F. Liang, M. Maggiora, Ling Zhao, D. P. Jin, Lei Zhao, Z. Y. He, Z. L. Hou, Yang Yang, D. Y. Wang, Dayong Wang, N. Qin, C. Z. Yuan, Guangshun Huang, H. H. Zhang, S. Han, L. H. Wu, M. Savrie, and W. G. Li

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, 0103 physical sciences, C parity, High Energy Physics::Experiment, Astrophysics, 010306 general physics, 01 natural sciences, Gamma gamma
Abstract

Using 1.06 x 10(8) psi(3686) events recorded in e(+)e(-) collisions at root s = 3.686 GeV with the BESIII at the BEPCII collider, we present searches for C-parity violation in J/psi -> gamma gamma and gamma phi decays via psi(3686) -> J/psi pi(+)pi(-). No significant signals are observed in either channel. Upper limits on the branching fractions are set to be B(J/psi -> gamma gamma) gamma phi) < 1.4 x 10(-6) at the 90% confidence level. The former is one order of magnitude more stringent than the previous upper limit, and the latter represents the first limit on this decay channel.

Published
2014

33. Resolving the puzzling decay patterns of chargedZcandZbstates

Author

Li-Ping Sun, Xiang Liu, Xiao-Hai Liu, Li Ma, and Shi-Lin Zhu

Subjects
Physics, Nuclear and High Energy Physics, Excited state, High Energy Physics::Experiment, Atomic physics, Ground state, Nuclear theory
Abstract

We investigate the ratio of the branching fractions of the molecular candidates decaying into the ground and radially excited states within the quark-interchange model. Our numerical results suggest that these molecular candidates are more likely to decay into the radially excited states than into ground states. In particular, the ratio $\mathrm{\ensuremath{\Gamma}}[{Z}_{c}(4430)\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\psi}(2S)]/\mathrm{\ensuremath{\Gamma}}[{Z}_{c}(4430)\ensuremath{\rightarrow}\ensuremath{\pi}J/\ensuremath{\psi}]\ensuremath{\sim}9.9$ is close to the experimental measurement, which supports the interpretation of ${Z}_{c}(4430)$ as the $\overline{D}{D}^{*}(2S)$ molecular state. The ratios of the branching fractions of ${Z}_{b}(10610)$ and ${Z}_{b}(10650)$ to $\ensuremath{\pi}\mathrm{\ensuremath{\Upsilon}}(2S,3S)$ and $\ensuremath{\pi}\mathrm{\ensuremath{\Upsilon}}(1S)$ agrees very well with the Belle Collaboration's measurement. We also predict the similar ratios for ${Z}_{c}(3900)$, ${Z}_{c}(4020)$, ${R}_{{Z}_{c}(3900)}\ensuremath{\approx}1.4$, and ${R}_{{Z}_{c}(4020)}\ensuremath{\approx}4.8$. Hopefully, the $\ensuremath{\pi}\ensuremath{\psi}(2S)$ mode and the ratios ${R}_{{Z}_{c}(3900)}$ and ${R}_{{Z}_{c}(4020)}$ will be measured by the BESIII and Belle collaborations in the near future, which shall be very helpful for understanding the underlying dynamics of these exotic states.

Published
2014

34. Probing theXYZstates through radiative decays

Author

Shi-Lin Zhu, Wei-Zhen Deng, Xiao-Hai Liu, Xiang Liu, Li Ma, and Zhi-Feng Sun

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, High Energy Physics - Lattice (hep-lat), High Energy Physics::Phenomenology, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), Formalism (philosophy of mathematics), High Energy Physics - Lattice, High Energy Physics - Phenomenology (hep-ph), Radiative transfer, High Energy Physics::Experiment, Multiplet, Nuclear theory
Abstract

In this work, we have adopted the spin rearrangement scheme in the heavy quark limit and extensively investigated three classes of the radiative decays: $\mathfrak{M}\to (b\bar{b})+\gamma$, $(b\bar{b})\to \mathfrak{M}+\gamma$, $ \mathfrak{M} \to \mathfrak{M}^\prime+\gamma$, corresponding to the electromagnetic transitions between one molecular state and bottomonium, one bottomonium and molecular state, and two molecular states respectively. We also extend the same formalism to study the radiative decays of the molecular states with hidden charm. We have derived some model independent ratios when the initial or final states belong to the same spin flavor multiplet. Future experimental measurement of these ratios will test the molecular picture and explore the underlying structures of the $XYZ$ states., Comment: 21 pages, 10 tables Accepted by Phys.Rev.D

Published
2014

35. Exotic four quark matter:Z1(4475)

Author

Li Ma, Xiang Liu, Xiao-Hai Liu, and Shi-Lin Zhu

Subjects
Quantum chromodynamics, Quark, Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Meson, High Energy Physics - Lattice (hep-lat), High Energy Physics::Phenomenology, FOS: Physical sciences, Resonance (particle physics), High Energy Physics - Experiment, Nuclear Theory (nucl-th), High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, Strange matter, High Energy Physics - Phenomenology (hep-ph), High Energy Physics - Lattice, Excited state, High Energy Physics::Experiment, Tetraquark, Nuclear Experiment, Pseudovector
Abstract

Motivated by the LHCb's recent confirmation of $Z_1(4475)$ as the $J^P=1^+$ resonance, we investigate various exotic interpretations of $Z_1(4475)$, which may be an axial vector tetraquark state, the P-wave excitation of the S-wave $D_1 {\bar D}^\ast$ or $D_2 {\bar D}^\ast$ molecule, the S-wave molecule composed of a $D$ or $D^*$ meson and a D-wave vector $D$ meson, or the cousin molecular state of $Z_c(3900)$ and $Z_c(4020)$ composed of a $D$ or $D^*$ meson and their radial excitations. With the help of the heavy quark symmetry, we predict the typical radiative and hidden-charm and open-charm strong decay patterns of $Z_1(4475)$, which are crucial to further identify the molecular state assignment of $Z_1(4475)$., 4 Pages, 1 Table. Minor modification added. Accepted by Phys. Rev. D

Published
2014

36. Investigating possible decay modes ofY(4260)underD1(2420)D¯+c.c.molecular state ansatz

Author

Gang Li and Xiao-Hai Liu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, High Energy Physics::Phenomenology, Effective lagrangian, High Energy Physics::Experiment, D-1, Ansatz
Abstract

By assuming that $Y(4260)$ is a ${D}_{1}\overline{D}$ molecular state, we investigate some hidden-charm and charmed pair decay channels of $Y(4260)$ via intermediate ${D}_{1}\overline{D}$ meson loops with an effective Lagrangian approach. Through investigating the $\ensuremath{\alpha}$ dependence of branching ratios and ratios between different decay channels, we show that the intermediate ${D}_{1}\overline{D}$ meson loops are crucial for driving these transitions of $Y(4260)$ studied here. The coupled channel effects turn out to be more important in $Y(4260)\ensuremath{\rightarrow}{D}^{*}{\overline{D}}^{*}$, which can be tested in future experiments.

Published
2013

39. Exploring the threshold behavior and implications on the nature ofY(4260)andZc(3900)

Author

Xiao-Hai Liu and Gang Li

Subjects
Physics, Cusp (singularity), Nuclear and High Energy Physics, Particle physics, Singularity, Amplitude, Scattering, High Energy Physics::Phenomenology, Radiative decay, State (functional analysis), Resonance (particle physics), Mathematical physics, Zc(3900)
Abstract

By assuming that $Y(4260)$ either is a ${D}_{1}\overline{D}$ molecular state or has sizeable couplings with ${D}_{0}{\overline{D}}^{*}$ and ${D}_{1}^{\ensuremath{'}}\overline{D}$, we investigate several decay modes of $Y(4260)$. Under the special kinematic configurations, triangle singularity may occur in the rescattering amplitude, which will significantly change the threshold behavior. Obvious threshold enhancements or narrow cusp structures appear quite naturally without introducing a genuine resonance. We emphasize that the radiative decay modes may be useful for studying ${D}^{(*)}\overline{D}$ $S$-wave scattering.

Published
2013

40. Open charm effects ine+e−→J/ψη,J/ψπ0, andϕηc

Author

Qian Wang, Qiang Zhao, and Xiao-Hai Liu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, High Energy Physics::Phenomenology, Hadron, Vector meson dominance, Gluon, Nuclear physics, Pi, High Energy Physics::Experiment, Open charm, Nuclear Experiment, Bar (unit), Line (formation)
Abstract

We propose to study the open charm effects in e(+)e(-) -> J/psi eta, J/psi pi(0) and phi eta(c). We show that the exclusive cross section line shapes of these processes would be strongly affected by the open charm effects. Since the final state light meson productions are through soft gluon radiations, we assume a recognition of this soft process via charmed meson loops at the hadronic level. A unique feature among these three reactions is that the D (D) over bar* + c.c. open channel is located in a relatively isolated energy, i. e. similar to 3: 876 GeV, which is sufficiently far away from the known charmonia psi(3770) and psi(4040). Therefore, the cross section line shapes of these reactions may provide an opportunity for singling out the open charm effects with relatively well-defined charmonium contributions. In particular, we find that the reaction e(+)e(-) -> J/psi pi(0) is sensitive to the open charm D (D) over bar* + c.c. Because of the dominance of the isospin-0 component at the charmonium energy region, we predict an enhanced model-independent cusp effect between the thresholds of D-0(D) over bar*(0) + c.c. and D+(D) over bar*(-) + c.c. This study can also help us to understand the X(3900) enhancement recently observed by the Belle Collaboration in e(+)e(-) -> D (D) over bar + c.c.

Published
2011

43. Evasion of helicity selection rule inχc1→VVandχc2→VPvia intermediate charmed meson loops

Author

Qiang Zhao and Xiao-Hai Liu

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Particle decay, Meson, Branching fraction, High Energy Physics::Phenomenology, Hadron, Perturbative QCD, High Energy Physics::Experiment, Elementary particle, Helicity
Abstract

The hadronic decays of ${\ensuremath{\chi}}_{c1}\ensuremath{\rightarrow}VV$ and ${\ensuremath{\chi}}_{c2}\ensuremath{\rightarrow}VP$ are supposed to be suppressed by the helicity selection rule in the perturbative QCD framework. With an effective Lagrangian method, we show that the intermediate charmed meson loops can provide a mechanism for the evasion of the helicity selection rule, and result in sizeable decay branching ratios in some of those channels. The theoretical predictions can be examined by the forthcoming BES-III data in the near future.

Published
2010

44. Possible mechanism for producing the threshold enhancement inJ/ψ→γpp¯

Author

Y. H. Zhang, Qiang Zhao, and Xiao-Hai Liu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Partial wave analysis, High Energy Physics::Phenomenology, Hyperon, Omega, Pseudoscalar, High Energy Physics::Experiment, Vector meson, Atomic physics, Nucleon
Abstract

In the J/psi radiative decay channels J/psi -> gamma V (V) over bar, the result of partial wave analysis indicates that the V (V) over bar systems are predominately pseudoscalar component, and most of these channels have relatively large branching ratios at an order of 10(-3). Meanwhile, vector mesons, such as rho, omega, and K*, have strong couplings with nucleons and/or hyperons. This suggests a dynamical mechanism describing the eta p (p) over bar form factors for higher eta mesons, such as eta(1405/1475) and eta(1760). It is thus natural to expect that rescatterings of these vector meson pairs into p (p) over bar of 0(-) partial wave could be an important source contributing to J/psi -> gamma p (p) over bar of which the branching ratio is at the order of 10(-4). Our calculation justifies this point. In particular, we find that interferences between different rescattering amplitudes can produce a significant threshold enhancement in the invariant mass spectrum of p (p) over bar. Without introducing dramatic ingredients, our model provides a natural explanation for the peculiar threshold enhancement observed by BES-II in J/psi -> gamma p (p) over bar. Additional experimental constraints on the V (V) over bar -> p (p) over bar transitions are examined. This mechanism in J/psi -> omega p (p) over bar is also discussed.

Published
2009

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