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Analysis of the isospin eigenstate $\overline{D}{\Sigma }_{c}$ , ${\overline{D}}^{\ast }{\Sigma }_{c}$ , and $\overline{D}\Sigma _{c}^{\ast }$ pentaquarks by their electromagnetic properties

2024    Özdem, Ulaş

To shed light on the nature of the controversial and not yet fully understood exotic states, we are carrying out a systematic study of their electromagnetic properties. The magnetic moment of a hadron state is as fundamental a dynamical quantity as its mass and contains valuable information on the deep underlying structure. In this study, we use the QCD light-cone sum rule to extract the magnetic moments of the ${P}_{c}\left(4312\right)$ , ${P}_{c}\left(4380\right)$ , and ${P}_{c}\left(4440\right)$ pentaquarks by considering them as the molecular picture with spin-parity ${J}^{P}={\frac{1}{2}}^{-}$ , ${J}^{P}={\frac{3}{2}}^{-}$ , and ${J}^{P}={\frac{3}{2}}^{-}$ , respectively. We define the isospin of the interpolating currents of these states, which is the key to solving the puzzle of the hidden-charm pentaquark states, to make these analyses more precise and reliable. We have compared our results with other theoretical predictions that could be a useful complementary tool for the interpretation of the hidden-charm pentaquark sector, and we observe that they are not in mutual agreement with each other. We have also calculated higher multipole moments for spin-3/2 ${\overline{D}}^{\ast }{\Sigma }_{c}$ and $\overline{D}\Sigma _{c}^{\ast }$ pentaquarks, indicating a non-spherical charge distribution.