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Paper   IPM / Physic / 15146
School of Physics
  Title:   The electromagnetic multipole moments of the charged open-flavor Zcq states
  Author(s): 
1.  K. Azizi
2.  U. Ozdem
  Status:   Published
  Journal: J. Phys. G
  Vol.:  45
  Year:  2018
  Pages:   055003
  Supported by:  IPM
  Abstract:
The electromagnetic multipole moments of the open-flavor Zcq states are investigated by assuming a diquark-antidiquark picture for their internal structure and quantum numbers JPC = 1+− for their spin-parity. In particular, their magnetic and quadrupole moments are extracted in the framework of light-cone QCD sum rule by the help of the photon distribution amplitudes. The electromagnetic multipole moments of the open-flavor Zcq states are important dynamical observables, which encode valuable information on their underlying structure. The results obtained for the magnetic moments of different structures are considerably large and can be measured in future experiments. We obtain very small values for the quadrupole moments of Zcq states indicating a nonspherical charge distribution.

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