Radiative decay and axial-vector decay behaviors of octet pentaquark states

Abstract

In this work, we systematically calculate transition magnetic moments, radiative decay widths, and axial-vector coupling constants of octet hidden-charm molecular pentaquark states with different flavor representations in constituent quark model. We discuss the relations between transition magnetic moments and decay widths for pentaquark states. For octet pentaquark states with the $8_{1f}$ and $8_{2f}$ flavor representations, decay widths of the processes $P_{\psi }|{\frac{3}{2}}^{-}{⟩}_{({\frac{1}{2}}^{+}\otimes 1^{-})}\to P_{\psi }|{\frac{1}{2}}^{-}{⟩}_{({\frac{1}{2}}^{+}\otimes 0^{-})}\gamma$ and $P_{\psi }|{\frac{1}{2}}^{-}{⟩}_{({\frac{1}{2}}^{+}\otimes 1^{-})}\to P_{\psi }|{\frac{1}{2}}^{-}{⟩}_{({\frac{1}{2}}^{+}\otimes 0^{-})}\gamma$ are quite close, decay widths of the $P_{\psi }|{\frac{3}{2}}^{-}{⟩}_{({\frac{1}{2}}^{+}\otimes 1^{-})}\to P_{\psi }|{\frac{1}{2}}^{-}{⟩}_{({\frac{1}{2}}^{+}\otimes 1^{-})}\gamma$ process are close to zero, and we notice that the axial-vector coupling constants of the pentaquark states are generally smaller than that of the nucleon.

18 pages, 0 figure

References in corpus (13)

• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Strong LHCb evidence supporting the existence of the hidden-charm molecular pentaquarks
• Study of $P_c(4457)$, $P_c(4440)$, and $P_c(4312)$ in a quasipotential Bethe-Salpeter equation approach
• Hidden-charm and hidden-bottom molecular pentaquarks in chiral perturbation theory
• Prediction of triple-charm molecular pentaquarks
• Strong decays of the newly $P_{cs}(4459)$ as a strange hidden-charm ${\Xi }_c{\bar{D}}^{\ast }$ molecule
• What can we learn from the electromagnetic properties of hidden-charm molecular pentaquarks with single strangeness?
• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• Hidden-charm pentaquarks with triple strangeness due to the ${\Omega }_c^{(\ast )}{\bar{D}}_s^{(\ast )}$ interactions
• Hidden charm pentaquark states in a diquark model
• Production of exotic tetraquarks $QQ\bar{q}\bar{q}$ in heavy-ion collisions at the LHC
• New type of doubly charmed molecular pentaquarks containing most strange quarks: Mass spectra, radiative decays, and magnetic moments
• Relations between strong decay widths of the $P_c$ pentaquarks in the SU(4) flavor-spin model