A study of J/ψ→γγV(ρ,φ) decays with the BESII detector

Bai, J. Z.; Ban, Y.; Bian, J. G.; Cai, X. D.; Chang, J. F.; Chen, H.F.; Chen, H.S.; Chen, H.X.; Chen, J.C.; Chen, J.; Chen, J.; Chen, M.L.; Chen, Y.B.; Chi, S.; Chu, Y. P.; Cui, X. Z.; Dai, H. L.; Dai, Y. S.; Deng, Z. Y.; Liu, Dong; Du, S. X.; Du, Z. Z.; Fang, J.; Fang, S. S.; Fu, C.D.; Fu, Hai-Bing; Fu, L. P.; Gao, C. S.; Gao, M.; Gao, Y.; Gong, Ming; Gong, W. X.; Gu, S.; Guo, Y. N.; Guo, Y. Q.; Han, S. W.; He, J.; He, K. L.; He, M.; He, Xiao‐Gang; Heng, Y. K.; Hu, H.; Hu, T.; Huang, G. S.; Huang, L. Q.; Huang, X. P.; Ji, Xiangdong; Jia, Qing; Jiang, C. H.; Jiang, X. S.; Jin, D. P.; Jin, S.; Jin, Y.; Lai, Y. F.; Li, F.; Li, G.; Li, Houxuan; Li, J.; Li, J.C.; Li, Q.J.; Li, R.B.; Li, R.Y.; Li, S.M.; Li, W.; Li, W.G.; Li, X.L.; Li, X.Q.; Li, XinYu; Liang, Y. F.; Liao, H.; Liu, C.X.; Liu, Fang; Liu, F.; Liu, H.M.; Liu, J.B.; Liu, J.P.; Liu, R.G.; Liu, Y.; Liu, Z.A.; Liu, Z.X.; Lu, G. R.; Lu, F. X.; Lu, J. G.; Luo, C. L.; Luo, X. L.; Ma, F.C.; Ma, J.; Ma, L.L.; Ma, Xiaoyan; Mao, Z. P.; Meng, X. C.; Mo, X. H.; Nie, J.; Nie, Z. D.; Peng, H.; Qi, N. D.; Qian, C. D.; H, Qin; Qiu, J. F.; Ren, Z.; Rong, G.; Shan, L. Y.; Shang, L.; Shen, D. L.; Shen, X. Y.; Sheng, H. Y.; Shi, Feng; Shi, X.; Song, L.; Sun, H.; Sun, S. S.; Sun, Y. Z.; Sun, Z. J.; Tang, X. W.; Tao, N.; Tian, Yang; Tong, G. L.; WANG, Dongmei; Wang, J.Z.; Wang, L.; Wang, L.S.; WANG, MICHAEL; Wang, Meng; Wang, P.; Wang, P.L.; Wang, S.Z.; Wang, W.F.; Wang, Y.F.; Wang, Zhe; Wang, Z.; Wang, Zheng; Wang, Z.Y.; Chen, Wei; Wu, N.; Wu, Y. M.; Xia, X. M.; Xie, X. X.; Xin, B.; Xu, G. F.; Xu, H. Y.; Xu, Y.; Xue, S.; Yan, Mu-Lin; Yan, W.; Yang, F.; Yang, H. X.; Yang, J.; Yang, S.; Yang, Yifan; Yi, L. H.; Yi, Z. Y.; Ye, M.; Ye, M.H.; Ye, Y.X.; Chen, Yu; Yu, G.; Yuan, C. Z.; Yuan, J. M.; Yuan, Y.; Yue, Q.; Zang, S. L.; Zeng, Y.; Zhang, B.X.; Zhang, B.Y.; Zhang, C.C.; Zhang, D.H.; Zhang, H.Y.; Zhang, J.; Zhang, J.M.; Zhang, J.Y.; Zhang, J.W.; Zhang, L.S.; Zhang, Q.J.; Zhang, S.Q.; Zhang, X.M.; Zhang, X.Y.; Zhang, Yiyun; Zhang, Y.J.; Zhang, Y.Y.; Zhang, Z.P.; Zhang, Z.Q.; Zhao, Dongxu; Zhao, J. B.; Zhao, J. W.; Zhao, P. P.; Zhao, W. R.; Zhao, Xinli; Zhao, Y. B.; Zhao, Z.; Zheng, H. Q.; Zheng, J. P.; Zheng, Lei; Zheng, Z. P.; Zhong, X. C.; Zhou, B.; Zhou, G. M.; Li, Zhou; Zhou, Na; Zhu, K.; Zhu, Q. M.; Zhu, Y.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, B. A.; Zou, B. S.

doi:10.1016/j.physletb.2004.04.085

Cited by 29 publications

(14 citation statements)

References 14 publications

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“…The partial width ratio of (Γ ηð1405/1475Þ→γρ : Γ ηð1405/1475Þ→γϕ ) is calculated to be ð11.10AE 3.50Þ: 1 for the case of destructive interference and ð7.53 AE 2.49Þ: 1 for constructive interference, where the branching fraction of J/ψ → γηð1405/1475Þ → γγρ is taken from the BES measurement [3]. The ratio is slightly larger than the prediction of 3.8: 1 in Ref.…”

mentioning

confidence: 73%

“…The results indicate that both ηð1475Þ and Xð1835Þ contain a sizeable ss component. A puzzling state, the ηð1440Þ, was first observed in pp annihilation at rest into ηð1440Þπ þ π − ðηð1440Þ → KKπ) [1], and later in J/ψ radiative decays to KKπ [2], γρ [3] and f 0 ð980Þπ 0 [4]. Further studies by different experiments reported evidence for the existence of two pseudoscalar mesons in this region, the ηð1405Þ and the ηð1475Þ [5].…”

mentioning

confidence: 99%

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Study of η(1475) and X(1835) in radiative
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2018
Phys. Rev. D
Self Cite

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mentioning

confidence: 73%

mentioning

confidence: 99%

Study of η(1475) and X(1835) in radiative
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2018
Phys. Rev. D
Self Cite

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“…At BES, (1295) and (1440) were studied in J / → ( ) and → ( ) [507]. A peak below 1300 MeV/c 2 was assigned to f 1 (1285) even though a small contribution from (1295) was not excluded.…”

Section: The Split (1440)mentioning

confidence: 99%

Glueballs, hybrids, multiquarks

2007

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Glueballs, hybrids and multiquark states are predicted as bound states in models guided by quantum chromo dynamics (QCD), by QCD sum rules or QCD on a lattice. Estimates for the (scalar) glueball ground state are in the mass range from 1000 to 1800 MeV, followed by a tensor and a pseudoscalar glueball at higher mass. Experiments have reported evidence for an abundance of meson resonances with 0 −+ , 0 ++ and 2 ++ quantum numbers. In particular, the sector of scalar mesons is full of surprises starting from the elusive and mesons. The a 0 (980) and f 0 (980), discussed extensively in the literature, are reviewed with emphasis on their Janus-like appearance as KK molecules, tetraquark states or qq mesons. Most exciting is the possibility that the three mesons f 0 (1370), f 0 (1500), and f 0 (1710) might reflect the appearance of a scalar glueball in the world of quarkonia. However, the existence of f 0 (1370) is not beyond doubt and there is evidence that both f 0 (1500) and f 0 (1710) are flavour octet states, possibly in a tetraquark composition. We suggest a scheme in which the scalar glueball is dissolved into the wide background into which all scalar flavour-singlet mesons collapse.There is an abundance of meson resonances with the quantum numbers of the . Three states are reported below 1.5 GeV/c 2 whereas quark models expect only one, perhaps two. One of these states, (1440), was the prime glueball candidate for a long time. We show that (1440) is the first radial excitation of the meson.Hybrids may have exotic quantum numbers which are not accessible by qq mesons. There are several claims for J P C = 1 −+ exotics, some of them with properties as predicted from the flux tube model interpreting the quark-antiquark binding by a gluon string. The evidence for these states depends partly on the assumption that meson-meson interactions are dominated by s-channel resonances. Hybrids with non-exotic quantum numbers should appear as additional states. Light-quark mesons exhibit a spectrum of (squared) masses which are proportional to the sum of orbital angular momentum and radial quantum numbers. Two states do not fall under this classification. They are discussed as hybrid candidates.The concept of multiquark states has received revived interest due to new resonances in the spectrum of states with open and hidden charm. The new states are surprisingly narrow and their masses and their decay modes often do not agree with simple quark-model expectations.Lattice gauge theories have made strong claims that glueballs and hybrids should appear in the meson spectrum. However, the existence of a scalar glueball, at least with a reasonable width, is highly questionable. It is possible that hybrids will turn up in complex multibody final states even though so far, no convincing case has been made for them by experimental data. Lattice gauge theories fail to identify the nonet of scalar mesons. Thus, at the present status of approximations, lattice gauge theories seem not to provide a trustworthy guide into unknown territory ...

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“…The BES-III detector is a major upgrade aiming at L = 10 33 /cm 2 /s luminosity and recorded its first hadronic event in July 2008. Results relevant to this review are given in [94][95][96][97][98][99][100][101][102][103] and discussed further in section 5.5. Radiative decays of cc and Υ (bb) states have been studied with the CLEO detector at the e + e − collider CESR at Cornell University.…”

Section: Proton-antiproton Annihilationmentioning

confidence: 99%

The experimental status of glueballs

Credé

Meyer

2009

Progress in Particle and Nuclear Physics

218

206

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a b s t r a c tGlueballs and other resonances with large gluonic components are predicted as bound states by Quantum Chromodynamics (QCD). The lightest (scalar) glueball is estimated to have a mass in the range from 1 to 2 GeV/c 2 ; pseudoscalar and tensor glueballs are expected at higher masses. Many different experiments exploiting a large variety of production mechanisms have presented results in recent years on light mesons with J PC = 0 ++ , 0 −+ , and 2 ++ quantum numbers. This review looks at the experimental status of glueballs. Good evidence exists for a scalar glueball which is mixed with nearby mesons, but a full understanding is still missing. Evidence for tensor and pseudoscalar glueballs are weak at best. Theoretical expectations of phenomenological models and QCD on the lattice are briefly discussed.

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A study of J/ψ→γγV(ρ,φ) decays with the BESII detector

Cited by 29 publications

References 14 publications

Study of η(1475) and X(1835) in radiative
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2018
Phys. Rev. D
Self Cite

Study of η(1475) and X(1835) in radiative
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2018
Phys. Rev. D
Self Cite

Glueballs, hybrids, multiquarks

The experimental status of glueballs

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A study of J/ψ→γγV(ρ,φ) decays with the BESII detector

Cited by 29 publications

References 14 publications

Study of η(1475) and X(1835) in radiative Ablikim1, Ачасов2, Ahmed3 et al. 2018Phys. Rev. DSelf Cite

Study of η(1475) and X(1835) in radiative Ablikim1, Ачасов2, Ahmed3 et al. 2018Phys. Rev. DSelf Cite

Glueballs, hybrids, multiquarks

The experimental status of glueballs

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Product

Resources

About

Study of η(1475) and X(1835) in radiative
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2018
Phys. Rev. D
Self Cite

Study of η(1475) and X(1835) in radiative
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2018
Phys. Rev. D
Self Cite