Dynamical study of Ω c 0 in the chiral quark model

Abstract

Recently, the experimental results of the LHCb Collaboration suggested the existence of five new excited states of Ωc0: Ωc(3000)0, Ωc(3050)0, Ωc(3066)0, Ωc(3090)0, and Ωc(3119)0; however, the quantum numbers of these new particles are not determined now. To understand the nature of these states, a dynamical calculation of Ωc0 both in five-quark configuration with quantum numbers IJP=0(12)-, 0(32)-, 0(52)- and in three-quark configuration with positive parity and negative parity was performed in the framework of the chiral quark model with the help of the Gaussian expansion method. The results show the masses both of the 1P and the 2S states in ssc systems are comparable to experimental data; Besides, ΞD̄, ΞcK̄, and Ξc∗K̄ are also possible candidates of these new particles if the parity is negative. The distances between quark pairs suggest a compact structure nature.