Nucleon resonances in πN→η'N and J/ψ→ppη'

  • We are aiming to study the J/ψ→ppη' decay in an isobar model and the effective Lagrangian approach on the basis of the coupling constants extracted from the πN→η'N reaction. After a careful exploration of the contributions of the S11(1535), P11(1710), P13(1900), S11(2090) and P11(2100) resonances, we conclude that either a subthreshold resonance or a broad P-wave state in the near threshold range seems to be indispensable to describe the present data of the πN→η'N. Furthermore, at least one broad resonance above η'N threshold is preferred. With this detailed analysis, we give the invariant mass spectrum and Dalitz plot of the J/ψ→ppη' decay for the purpose of assisting the future detailed partial wave analysis. It is found that the J/ψ→ppη' data are useful for disentangling the above or below threshold resonant contribution, though it still further needs the differential cross section data of πN→η'N to realize some of the resonant and non-resonant contribution.
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Xu Cao and Ju-Jun Xie. Nucleon resonances in πN→η'N and J/ψ→ppη'[J]. Chinese Physics C, 2016, 40(8): 083103. doi: 10.1088/1674-1137/40/8/083103
Xu Cao and Ju-Jun Xie. Nucleon resonances in πN→η'N and J/ψ→ppη'[J]. Chinese Physics C, 2016, 40(8): 083103.  doi: 10.1088/1674-1137/40/8/083103 shu
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Received: 2015-09-10
Revised: 2016-04-12
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    Supported by National Natural Science Foundation of China (11347146, 11405222, 11105126, 11475227)

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Nucleon resonances in πN→η'N and J/ψ→ppη'

    Corresponding author: Xu Cao,
    Corresponding author: Ju-Jun Xie,
  • 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 3. Kavli Institute for Theoretical Physics China (KITPC), Chinese Academy of Sciences, Beijing 100190, China
  • 4. Research Center for Hadron and CSR Physics, Institute of Modern Physics ofCAS and Lanzhou University, Lanzhou 730000, China
Fund Project:  Supported by National Natural Science Foundation of China (11347146, 11405222, 11105126, 11475227)

Abstract: We are aiming to study the J/ψ→ppη' decay in an isobar model and the effective Lagrangian approach on the basis of the coupling constants extracted from the πN→η'N reaction. After a careful exploration of the contributions of the S11(1535), P11(1710), P13(1900), S11(2090) and P11(2100) resonances, we conclude that either a subthreshold resonance or a broad P-wave state in the near threshold range seems to be indispensable to describe the present data of the πN→η'N. Furthermore, at least one broad resonance above η'N threshold is preferred. With this detailed analysis, we give the invariant mass spectrum and Dalitz plot of the J/ψ→ppη' decay for the purpose of assisting the future detailed partial wave analysis. It is found that the J/ψ→ppη' data are useful for disentangling the above or below threshold resonant contribution, though it still further needs the differential cross section data of πN→η'N to realize some of the resonant and non-resonant contribution.

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