Hidden and double charm-strange tetraquarks and their decays in a potential quark model

We carry out a systematic study of the 1 S -wave hidden and double charm-strange tetraquarks csc̄s̄ c s c ¯ s ¯ and ccs̄s̄ c c s ¯ s ¯ in a nonrelativistic potential quark model framework with the explicitly correlated Gaussian method, and the mass spectra, color-spin configurations and possible decay modes are obtained. We find that although these states are all above their open flavor thresholds, their rearrangement decay widths are rather narrow which can be understood by the mismatching of the wave functions between the initial and final states. It implies that the tetraquarks of csc̄s̄ c s c ¯ s ¯ and ccs̄s̄ c c s ¯ s ¯ may have a good chance to exist as genuine tetraquark states. It also shows that the color-spin configurations of the csc̄s̄ c s c ¯ s ¯ and ccs̄s̄ c c s ¯ s ¯ systems are quite different. We find that for a physical state of csc̄s̄ c s c ¯ s ¯ its color configurations can be dominated by either the |11 c