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Ablikim, M.; Fang, S. S.; Yang, H. X.; Zhao, M. G.; Varner, G.; Zhou, L.; Ma, F.C.; Dai, Y.S.; Zhang, Z.P.; Liu, F.; Chen, Jun; Lai, Y. F.; Shi, Feng; Ye, M.; Olsen, S. L.; Xue, S.; Liu, Z.X.; Peng, H.; Yang, F.; Zhao, J. W.; Zhu, K.; Guo, Z. J.; He, Miao; Gong, W. X.; Li, W.G.; Tang, Xiao; Liu, H.H.; Xia, X. M.; Xu, H.; Shan, L. Y.; Wang, S.Z.; Wang, P.; Wei, D. H.; Li, H.H.; Sun, S.S.; Sun, H. S.; Jin, Y.; Zhang, Z.Q.; Ma, Hailong; Fang, J.; Zhang, X.M.; Huang, X. P.; Lü, Gang; Chen, H.S.; Ren, Z.; Qiu, J. F.; Wang, L.; Zeng, Y.; Nie, J.; Li, W.D.; Li, J.; Fu, Hong; Luo, X. L.; Zhang, D.H.; Rong, G.; Zhuang, B. A.; Wang, D.Y.; Chen, H.X.; Dong, L. Y.; Liang, Y. F.; He, X.; Chi, S.; Sun, Z.J.; He, K. L.; Zhao, J.; Li, X.Q.; Li, S.M.; Hu, H. M.; Zheng, J. P.; Shang, L.; Liu, J.P.; Zhao, Di-Xin; Zhou, Bang-Rong; Zhang, S.Q.; Tong, G. L.; Zhu, Z.A.; Dong, Qingshun; Liu, Z.A.; Zheng, Z. P.; Zhu, Y.S.; Wang, L.S.; Yang, Jie; Nie, Z. D.; Wang, Y.F.; Deng, Z. Y.; Zhu, Qingjun; Du, Z. Z.; Wang, W.F.; Zhao, Y. B.; Qi, N. D.; Yi, L. H.; Chu, Y.P.; H, Qin; Wang, Z.; Xin, B.; Shen, X. Y.; Zou, B. S.; Ma, X.Y.; Xie, X. X.; Du, S. X.; Xu, G.; Dai, H. L.; Zhuang, X.; Jiang, X. S.; Qian, C. D.; Yuan, C. Z.; Yi, Z. Y.; Mo, X. H.; Wang, J.Z.; Wang, Zhe; Liu, Fang; Zhao, P. P.; Wang, M.; Wang, Z.Y.; Zheng, Lei; Ma, Qiumei; Li, Q.J.; Wang, P.L.; Li, G.; Chen, J.C.; Liu, J.; Liu, C.X.; Ml, Yan; Tao, N.; Liu, R.G.; Lu, F.; Ban, Yong; Zhang, C.C.; Lu, Junchao; Tian, Y.R.; Zhang, H.Y.; Li, R.Y.; Jin, Y.; Bian, J. G.; Wu, Yuanming; Sun, Y. Z.; Chen, H.F.; Ji, X. B.; Shen, D. L.; Zhou, Na; Chen, Yu; Liao, H.; Zhang, J.W.; Zhang, X.Y.; Li, F.; Zheng, H. Q.; Zhao, Z. G.; Chang, J. F.; Luo, Liying; Gong, Mengyuan; Wei, C.L.; Ye, Y.X.; Liu, H.M.; Chen, M.L.; Zhang, B.X.; Wang, Zheng; Lü, H. J.; Zhang, Y.Y.; Zhang, J.; Zhang, B.Y.; Chen, Y.B.; Harris, F. A.; Hu, Tong; Yuan, J. M.; Huang, X. T.; Cui, X.Z.; Zhou, G. M.; Guo, Y.Q.; Ma, J.M.; Huang, G. S.; Gao, Chong Shou; Sun, J.; Zhao, X.; Zhang, Q.J.; Li, J.C.; Fu, C. D.; Shi, X.; Zhang, Yiyun; Ma, Xing-Ke; Jin, S.; Mao, Z. P.; Gao, Y.; Yuan, Y.; Zhang, J.Y.; Yang, Yueling; Sheng, H. Y.; Wang, K.; Bai, J. Z.; Zhu, Y.; Zhong, X. C.; Ye, M.H.; Chen, Jin; Zhu, Y. M.; Li, Y.L.; Zhao, W. R.; Cai, X.; Zeng, Yun; Jiang, C.H.; Heng, Y. K.; Gu, S.; Jin, D. P.; Luo, C. L.; Li, X.L.; Yu, G.W.; Zang, S. L.; Ma, Lianliang; Guo, Y.; Wu, Ning; Liu, J.B.

doi:10.1103/physrevd.71.019901

Cited by 12 publications

(10 citation statements)

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“…Finally, there are also a number of interesting phenomenological observations to be made. First, there are similar near threshold excesses which have already been observed in light vector mesons through radiative J/ψ or exclusive B decays: the near threshold enhancements for two isospin-0 vectors φφ, ωω, and ωφ; [93][94][95][96][97][98][99] and the near threshold enhancement for two isospin-1 vectors ρρ. 100,101 However, there has been no clear structure observed that decays into two vectors that one of them has isospin-1 and the other has isospin-0-φρ or ωρ.…”

Section: Possible Interpretations and Outlookmentioning

confidence: 60%

EXPERIMENTAL REVIEW OF STRUCTURES IN THE J/Ψϕ MASS SPECTRUM

2013

Int. J. Mod. Phys. A

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The discovery of numerous new charmonium-like structures since 2003 have revitalized interest in exotic meson spectroscopy. These structures do not fit easily into the conventional charmonium model, and proposals like four-quark states, hybrids and rescattering effects have been suggested as explanations. Since 2009, several new structures were reported in the J/ψφ mass spectrum with the following characteristics: they are the first ones reported decaying into two heavy mesons which contain both a cc pair and a ss pair; and their masses are well beyond the open charm pair threshold. Conventional cc states with a mass beyond the J/ψφ threshold are not expected to decay into this channel and the width is expected to be large, thus they are good candidates for exotic mesons. The focus of this paper is to review the recent developments on the structures in the J/ψφ mass spectrum from CDF, Belle and LHCb. Keywords: Exotic hadron; charmonium; exotic quantum number. PACS numbers: 14.40.Gx, 13.25.Gv, 12.39.Mk 1330020-1 Int. J. Mod. Phys. A 2013.28. Downloaded from www.worldscientific.com by GEORGE WASHINGTON UNIVERSITY on 02/05/15. For personal use only. K. Yi in the heavy quark sector, especially since the discovery of the X(3872) by Belle in 2003. 22-25 1.1. Recent developments of charmonium-like structures 1330020-3 Int. J. Mod. Phys. A 2013.28. Downloaded from www.worldscientific.com by GEORGE WASHINGTON UNIVERSITY on 02/05/15. For personal use only. 1330020-5 Int. J. Mod. Phys. A 2013.28. Downloaded from www.worldscientific.com by GEORGE WASHINGTON UNIVERSITY on 02/05/15. For personal use only.

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Section: Possible Interpretations and Outlookmentioning

confidence: 60%

EXPERIMENTAL REVIEW OF STRUCTURES IN THE J/Ψϕ MASS SPECTRUM

2013

Int. J. Mod. Phys. A

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“…For the e + e − → V P with V and P being a vector and pseudoscalar meson, respectively, the differential cross section scales as [20] are consistent with the above scaling in Eq. (4) (see also results from BES [21] and BaBar [22]).…”

mentioning

confidence: 79%

On the constituent counting rule for hard exclusive processes involving multi-quark states

Guo

Meißner²,

Wang

2017

Chinese Phys. C

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At high energies, the cross section of a hard exclusive process at finite scattering angle falls off as a negative power of the center-of-mass energy √ s. If all involved quark-gluon compositions undergo hard momentum transfers, the scaling of the fall-off is determined by the underlying valence structures of the initial and final states, known as the constituent counting rules. It was argued in the literature that the counting rules are a powerful tool to determine the valence degrees of freedom inside multiquark states when applied to exclusive production processes. However, we demonstrate that for hadrons with hidden flavors the naive application of the constituent counting rules is problematic, since it is not mandatory for all components to participate the hard scattering at the scale √ s. The correct scaling rules can be obtained easily by using effective field theory. A few examples involving the Z c (3900) ± and X(3872) are discussed. * Electronic address: fkguo@itp.ac.cn

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“…The existence of η(1760) therefore rests on (a) the BES I analysis [8], where M = 1760 ± 35 MeV, Γ ∼ 250 MeV, (but quoted as not well determined), (b) the BES II analysis of J/ψ → γ(ωω), M = 1744 ± 10(stat) ± 15(syst) MeV, Γ = 244 +24 −21 ± 25 MeV [9]. There is a serious objection to this second source.…”

Section: Introductionmentioning

confidence: 99%