Group Theory Analysis of P_c Resonances in Molecular Picture

2021/05/07 by Phumphan, Kanokphon, Xu, Kai, Ruangyoo, Wiriya +3
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2105.03150

Abstract

Hidden-charm pentaquarks are analysed in Group Theory in the baryon-meson molecule picture within the framework of the constituent quark model. The investigation of strong decays of pentaquark resonances reveals that pentaquark states of all quark configurations can decay through the N J/ψ channel while only five pentaquark states may decay in open-charm modes. The partial decay widths in the pη_c channel are in the same order as in the p J/ψ channel for J^P=1/2^- baryon-meson pentaquark states, but the pη_c channel is forbidden for J^P=3/2^- states. The p η_c, Σ_cD and Λ_c⁺D channels open for J^P=1/2^- P_c(4440) and P_c(4457) while the Σ_c^*D channel opens for J^P=3/2^- P_c(4440) and P_c(4457). For P_c(4312), due to the mass threshold of Σ_cD and Σ_c^*D higher than 4312 MeV, the p η_c and Λ_c⁺D channels are open for J^P=1/2^- but no open-charm channel open for J^P=3/2^-. We strongly suggest that the spin of the P_c resonances may be determined in experiments by investigating the p η_c and open-charm channels.

Related

• P_c states in the mixture of molecular and pentaquark pictures
• Looking for the hidden-charm pentaquark resonances in J/ψp scattering
• Production mechanism of the hidden charm pentaquark states P_cc
• Interpretation of LHCb Hidden-Charm Pentaquarks within the Compact Diquark Model
• Production mechanism of hidden-charm pentaquark states P_ccs with strangeness S=-1