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Paper   IPM / Particles And Accelerator / 15500
School of Particles and Accelerator
  Title:   New charged resonance Zc(4100): the spectroscopic parameters and width
  Author(s): 
1.  Hayriye Sundu
2.  Shahin. S Agaev
3.  Kazem Azizi
  Status:   Published
  Journal: Eur. Phys. J. C
  No.:  3, 215
  Vol.:  79
  Year:  2019
  Supported by:  IPM
  Abstract:
The mass, coupling and width of the newly observed charged resonance Zc(4100) are calculated by treating it as a scalar four-quark system with a diquark-antidiquark structure. The mass and coupling of the state Zc(4100) are calculated using the QCD two-point sum rules. In these calculations we take into account contributions of the quark, gluon and mixed condensates up to dimension ten. The spectroscopic parameters of Zc(4100) obtained by this way are employed to study its S-wave decays to ηc(1S, ηc(2S and J/ψρ final states. To this end, we evaluate the strong coupling constants gZcηc1 π, gZcηc2 π and gZcJ/ψρ corresponding to the vertices Zc(4100)ηc(1S, Zc(4100)ηc(2S) π and Zc(4100)J/ψρ, respectively. The first two couplings are computed by means of the QCD three-point sum rule method, whereas gZcJ/ψρ is obtained from the QCD light-cone sum rule approach and soft-meson approximation. Obtained result for the mass m=(4080 ±150) MeV of the resonance Zc(4100) is in excellent agreement with the LHCb data. The prediction for its total width Γ = (128 ±19) MeV is compatible with the data within the errors.

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