Investigating excited $\Omega_c$ states from pentaquark perspective

Author:

Ye Yan, Xiaohuang Hu, Hongxia Huang, Jialun Ping

Keyword:

High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory (nucl-th)

journal:

date:

2023-09-26 16:00:00

Abstract

Inspired by the recent observation of new $\Omega_c^0$ states by the LHCb Collaboration, we explore the excited $\Omega_{c}$ states from the pentaquark perspective in the quark delocalization color screening model. Our results indicate that the $\Omega_c(3185)$ can be well interpreted as a molecular $\Xi D$ predominated resonance state with $J^P=1/2^-$. The $\Omega_c(3120)$ can also be interpreted as a molecular $\Xi_c^* \bar{K}$ state with $J^P=3/2^-$ and a new molecular state $\Xi^*_c \bar{K}^*$ with $J^P=5/2^-$ and a mass of 3527 MeV is predicted, which is worth searching in the future. Other reported $\Omega_c$ states cannot be well described in the framework of pentaquark systems in present work. The three-quark excited state, or the unquenched picture may be a good explanation, which is worth further exploration.

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