Study of 
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 and Observation of 
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Ablikim, M.; Ачасов, М. Н.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, Y.; Bakina, O.; Ferroli, R. Baldini; Ban, Y.; Begzsuren, K.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Biernat, J.; Bloms, J.; Boyko, I. R.; Briere, R. A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Çetin, S. A.; Chai, J.; Chang, J. F.; Chang, W. L.; Chelkov, G. A.; Chen, D. Y.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, S. J.; Chen, Y. B.; Cheng, W. S.; Cibinetto, G.; Cossio, F.; Cui, X. F.; Dai, H. L.; Dai, J. P.; Dai, X. C.; Dbeyssi, A.; Dedovich, D. V.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Mori, F. De; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dou, Z. L.; Du, S. X.; Fan, J.; Fang, J.; Fang, S. S.; Fang, Y.; Farinelli, R.; Fava, L.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fritsch, M.; Fu, C. D.; Fu, Y.; Gao, Q.; Gao, X. L.; Gao, Y.; Gao, Y.; Gao, Z.; Garillon, B.; Garzia, I.; Gersabeck, E.; Gilman, A.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, L. M.; Gu, M. H.; Gu, S.; Gu, Y. T.; Guo, A. Q.; Guo, L. B.; Guo, R. P.; Guo, Y. P.; Guskov, A.; Han, S.; Hao, X. Q.; Harris, F. A.; He, K. L.; Heinsius, F. H.; Held, T.; Heng, Y. K.; Hou, Y. R.; Hou, Z. L.; Hu, H. M.; Hu, J. F.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, J. S.; Huang, X. T.; Huang, Xiaozhong; Hüsken, N.; Hussain, T.; Andersson, W. Ikegami; Imoehl, W.; Irshad, M.; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, H. L.; Jiang, X. S.; Jiang, X. Y.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Jin, Y.; Johansson, T.; Kalantar‐Nayestanaki, N.; Kang, X. S.; Kappert, R.; Kavatsyuk, M.; Ke, B. C.; Keshk, I. K.; Khan, Tabassum; Khoukaz, A.; Kiese, P.; Kiuchi, R.; Kliemt, R.; Koch, L.; Kolcu, O. B.; Kopf, B.; Kuemmel, M.; Kuessner, M.; Kupść, A.; Kurth, M. G.; Kühn, W.; Lange, J. S.; Larin, P.; Lavezzi, L.; Leithoff, H.; Lenz, T.; Li, C.; Li, Cheng; Li, D. M.; Li, F.; Li, F. Y.; Li, G.; Li, H. B.; Li, H. J.; Li, J. C.; Li, J. W.; Li, Ké; Li, L. K.; Li, Lei; Li, P. L.; Li, P. R.; Li, Q. Y.; Li, W. D.; Li, W. G.; Li, X. H.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, Z. B.; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Liao, L. Z.; Libby, J.; Lin, C. X.; Lin, D. X.; Lin, Y. J.; Liu, B.; Liu, B. J.; Liu, C. X.; Liu, D.; Liu, D. Y.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H. B.; Liu, H. M.; Liu, Huanhuan; Liu, Huihui; Liu, J. B.; Liu, J. Y.; Liu, K. Y.; Liu, Ke; Liu, Q.; Liu, S. B.; Liu, T.; Liu, X.; Liu, X. Y.; Liu, Y. B.; Liu, Z. A.; Liu, Zhiqing; Long, Y. F.; Lou, X.; Lü, H. J.; Lu, J. D.; Lu, J. G.; Lu, Y.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, P. W.; Luo, T.; Luo, X. L.; Lusso, S.; Lyu, X. R.; C., F.; L., H.; L., L.; M., M.; M., Q.; N., X.; X., X.; Y., X.; M., Y.; Maas, F. E.; Maggiora, M.; Maldaner, S.; Malde, S.; Malik, Q. A.; Mangoni, A.; Mao, Y. 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S.; Sun, X. H.; Sun, Y. J.; Sun, Y. K.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tan, Y. T.; Tang, C. J.; Tang, G. Y.; Tang, X.; Thoren, V.; Tsednee, B.; Uman, I.; Wang, B.; Wang, B. L.; Wang, C. W.; Wang, D. Y.; Wang, H. H.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, M. Z.; Wang, Meng; Wang, P. L.; Wang, R. M.; Wang, W. P.; Wang, X.; Wang, X. F.; Wang, X. L.; Wang, Y.; Wang, Y. F.; Wang, Z.; Wang, Z. G.; Wang, Z. Y.; Wang, Zongyuan; Weber, T.; Wei, D. H.; Weidenkaff, P.; Wen, Hao; Wen, S. P.; Wiedner, U.; Wilkinson, G.; Wolke, M.; Wu, L. H.; Wu, L. J.; Wu, Z.; Xia, L.; Xia, Y.; Xiao, S. Y.; Xiao, Yunlong; Xiao, Z. J.; Xie, Y.; Xie, Y.; Xing, T. Y.; Xiong, X. A.; Xiu, Q. L.; Xu, G. F.; Xu, Jingjing; Xu, Lei; Xu, Q. J.; Xu, W.; Xu, X. P.; Yan, F.; Yan, L.; Yan, W. B.; Yan, W. C.; Yan, Y. H.; Yang, H. J.; Yang, H. X.; Yang, L.; Yang, R. X.; Yang, S.; Yang, Yifan; Yang, Yifan; Yang, Z.; Ye, M.; Ye, M. H.; Yin, J. H.; Zhou, You; Yu, B. X.; Yu, C. X.; Yu, J. S.; Yuan, C. Z.; Yuan, X. Q.; Yuan, Y.; Yuncu, A.; Zafar, A. A.; Zeng, Y.; Zhang, B. X.; Zhang, B. Y.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J.; Zhang, J. L.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, K.; Zhang, L.; Zhang, S. F.; Zhang, T. J.; Zhang, X. Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Y. T.; Zhang, Yang; Zhang, Yao; Zhang, Yi; Zhang, Yu; Zhang, Z. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhao, G.; Zhao, J. W.; Zhao, J. Y.; Zhao, J. Z.; Liu, Zhao; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, Y.; Zheng, Y.; Zhong, B.; Li, Zhou; Zhou, Q.; Zhou, Xiang; Zhou, X. K.; Zhou, X. Y.; Zhou, X. R.; Zhu, A. N.; Zhu, Jing; Zhu, K. J.; Zhu, S. H.; Zhu, W. J.; Zhu, X.; Zhu, Y.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zou, B. S.; Zou, J. H.

doi:10.1103/physrevlett.122.232002

Cited by 79 publications

(69 citation statements)

References 44 publications

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“…The nature of this state remains quite controversial [39]; for instance, it might even be the lowest ccss state [40]. Indeed, a very recent determination of the mass of this state as an ωJ/ψ resonance [41] gives 3926.4 ± 2.2 MeV. Meanwhile, the statesX ( ) I=1 0 are quasi-degenerate, appearing near the unconfirmed state X(3940).…”

Section: Results and Analysismentioning

confidence: 99%

The dynamical diquark model: fine structure and isospin

Giron

Lebed

Peterson

2020

J. High Energ. Phys.

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We incorporate fine-structure corrections into the dynamical diquark model of multiquark exotic hadrons. These improvements include effects due to finite diquark size, spin-spin couplings within the diquarks, and most significantly, isospin-dependent couplings in the form of pionlike exchanges expected to occur between the light quarks within the diquarks. Using a simplified two-parameter interaction Hamiltonian, we obtain fits in which the isoscalar J P C = 1 ++ state-identified as the X(3872)-appears naturally as the lightest exotic (including all states that are predicted by the model but have not yet been observed), while the Zc(3900) and Zc(4020) decay predominantly to J/ψ and ηc, respectively, in accord with experiment. We explore implications of this model for the excited tetraquark multiplets and the pentaquarks.

show abstract

Section: Results and Analysismentioning

confidence: 99%

The dynamical diquark model: fine structure and isospin

Giron

Lebed

Peterson

2020

J. High Energ. Phys.

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show abstract

“…The BESIII collaboration has measured the cross section for Xγ from e + e − annihilation at center-of-mass energies ranging from 4.008 GeV to 4.6 GeV [24,25]. The cross section seems to have a broad peak near 4.2 GeV.…”

Section: Discussionmentioning

confidence: 99%

“…For |E X | = 0.17 MeV, the cross section at the local minimum is about 0.07 pb. The BESIII collaboration has measured cross sections for e + e − annihilation into Xγ at center-of-mass energies ranging from 4.008 GeV to 4.6 GeV by observing X in the final states J/ψ π + π − and J/ψ π + π − π 0 [24,25]. They did not measure the cross section at energies between 4.009 MeV and 4.178 MeV, which includes the predicted energy 4.016 GeV of the peak from the triangle singularity.…”

Section: Peak From the Triangle Singularitymentioning

confidence: 99%

“…They did not measure the cross section at energies between 4.009 MeV and 4.178 MeV, which includes the predicted energy 4.016 GeV of the peak from the triangle singularity. The BESIII collaboration measured the cross sections in 10 MeV steps between 4.178 GeV and 4.278 GeV [25]. The largest measured value of the product σ Br of the cross section and the branching fraction Br of X into J/ψ π + π − was about 0.5 pb.…”

Section: Peak From the Triangle Singularitymentioning

confidence: 99%

“…The production of Xγ in e + e − annihilation has been studied by the BESIII collaboration [24,25]. The cross section was measured at the center-of-mass energies ranging from 4.008 GeV to 4.6 GeV.…”

Section: Introductionmentioning

confidence: 99%

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Production of X(3872) and a photon in e+e− annihilation

Braaten

Ingles

2020

Phys. Rev. D

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If the X(3872) is a weakly bound charm-meson molecule, it can be produced in e + e − annihilation by the creation of D * 0D * 0 from a virtual photon followed by the rescattering of the P-wave charmmeson pair into the X and a photon. A triangle singularity produces a narrow peak in the cross section for e + e − → Xγ 2.2 MeV above the D * 0D * 0 threshold. We predict the normalized cross section in the region of the peak. We show that the absorptive contribution to the cross section for e + e − → D * 0D * 0 → Xγ, which was calculated previously by Dubynskiy and Voloshin, does not give a good approximation to the peak from the triangle singularity.

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Observation of e+e− → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

Ablikim¹,

Ачасов²,

Adlarson³

et al. 2021

J. High Energ. Phys.

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Using a total of 5.25 fb−1 of e+e− collision data with center-of-mass energies from 4.236 to 4.600 GeV, we report the first observation of the process e+e−→ ηψ(2S) with a statistical significance of 4.9 standard deviations. The data sets were collected by the BESIII detector operating at the BEPCII storage ring. We measure the yield of events integrated over center-of-mass energies and also present the energy dependence of the measured cross section.

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Study of e+e−→γωJ/ψ and Observation of
M. Ablikim¹,
М. Н. Ачасов²,
P. Adlarson³
et al.

Abstract: We study the e þ e − → γωJ=ψ process using 11.6 fb −1 e þ e − annihilation data taken at center-of-mass energies from ffiffi ffi s p ¼ 4.008 GeV to 4.600 GeV with the BESIII detector at the BEPCII storage ring. The

Cited by 79 publications

References 44 publications

The dynamical diquark model: fine structure and isospin

The dynamical diquark model: fine structure and isospin

Production of X(3872) and a photon in e+e− annihilation

Observation of e+e− → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

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About

Study of e+e−→γωJ/ψ and Observation of M. Ablikim1, М. Н. Ачасов2, P. Adlarson3 et al.

Abstract: We study the e þ e − → γωJ=ψ process using 11.6 fb −1 e þ e − annihilation data taken at center-of-mass energies from ffiffi ffi s p ¼ 4.008 GeV to 4.600 GeV with the BESIII detector at the BEPCII storage ring. The

Cited by 79 publications

References 44 publications

The dynamical diquark model: fine structure and isospin

The dynamical diquark model: fine structure and isospin

Production of X(3872) and a photon in e+e− annihilation

Observation of e+e− → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

Contact Info

Product

Resources

About

Study of e+e−→γωJ/ψ and Observation of
M. Ablikim¹,
М. Н. Ачасов²,
P. Adlarson³
et al.