Search for doubly charmed dibaryons in baryon-baryon scattering

Abstract

We perform a systematical investigation of the doubly charmed dibaryon system with quantum numbers $IJ=01$, and strangeness numbers $S=0$, $-2$ and $-4$ in the framework of the chiral quark model. Two resonance states with strangeness numbers $S=-2$ is obtained in the $\Lambda {\Omega }_{cc}$ scattering channel, which are ${\Xi }_{cc}^{\ast }\Xi$ with resonance mass 5081 MeV and decay width 0.3 MeV, and the ${\Xi }_c{\Xi }_c^{\ast }$ state with the mass 5213 MeV and decay width 19.8 MeV, respectively. These two predicted charmed dibaryon candidates are worth searching for experimentally. Besides, we would like to emphasize that the multi-channel coupling calculation is important to confirm the existence of multiquark states. The coupling can shift the energy of the resonance, give the width to the resonance and even destroy the resonance. Therefore, to provide the necessary information for experiments to search for exotic hadron states, the coupling calculation between the bound channels and open channels is indispensable.

Comments: 16 pages, 11 figures