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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2016, Vol. 40> Issue(8) : 081002 DOI: 10.1088/1674-1137/40/8/081002

Exotic vector charmonium and its leptonic decay width

  • 1.

     Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 2.

     Theoretical Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China

  • 3.

     Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China

  • 4.

     Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Changsha 410081, China

  • We propose a novel type of interpolating field operator, which manifests the hybrid-like configuration that the charm quark-antiquark pair recoils against gluonic degrees of freedom. A heavy vector charmonium-like state with a mass of 4.33(2)GeV is disentangled from the conventional charmonium states in the quenched approximation. This state has affinity for the hybrid-like operators but couples less to the relevant quark bilinear operator. We also try to extract its leptonic decay constant and give a tentative upper limit that it is less than one tenth of that of J/ψ, which corresponds to a leptonic decay width about dozens of eV. The connection of this state with X(4260) is also discussed.
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  • References

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Ying Chen, Wei-Feng Chiu, Ming Gong, Long-Cheng Gui and Zhao-Feng Liu. Exotic vector charmonium and its leptonic decay width[J]. Chinese Physics C, 2016, 40(8): 081002. doi: 10.1088/1674-1137/40/8/081002
Ying Chen, Wei-Feng Chiu, Ming Gong, Long-Cheng Gui and Zhao-Feng Liu. Exotic vector charmonium and its leptonic decay width[J]. Chinese Physics C, 2016, 40(8): 081002.  doi: 10.1088/1674-1137/40/8/081002 shu
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Received: 2016-04-13
Fund

    This work is supported in part by the National Science Foundation of China (NSFC) (11575196, 11575197, 11335001, 11405053), Y.C. and Z.L. also acknowledge the support of NSFC (11261130311) (CRC 110 by DFG and NSFC)

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Exotic vector charmonium and its leptonic decay width

    Corresponding author: Ying Chen,
  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 2. Theoretical Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China
  • 3. Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
  • 4. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Changsha 410081, China
  • Received Date: 2016-04-13
  • Available Online: 2016-08-05
Fund Project:  This work is supported in part by the National Science Foundation of China (NSFC) (11575196, 11575197, 11335001, 11405053), Y.C. and Z.L. also acknowledge the support of NSFC (11261130311) (CRC 110 by DFG and NSFC)

Abstract: We propose a novel type of interpolating field operator, which manifests the hybrid-like configuration that the charm quark-antiquark pair recoils against gluonic degrees of freedom. A heavy vector charmonium-like state with a mass of 4.33(2)GeV is disentangled from the conventional charmonium states in the quenched approximation. This state has affinity for the hybrid-like operators but couples less to the relevant quark bilinear operator. We also try to extract its leptonic decay constant and give a tentative upper limit that it is less than one tenth of that of J/ψ, which corresponds to a leptonic decay width about dozens of eV. The connection of this state with X(4260) is also discussed.

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