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We propose a chiral quark model including the $\omega$ and $\rho$ mesoncontributions in addition to the $\pi$ and $\sigma$ meson contributions. Weshow that the masses of the ground state baryons such as the nucleon,$\Lambda_c$ and $\Lambda_b$ are dramatically improved in the model with thevector mesons compared with the one without them. The study of the tetraquark$T_{cc}$ is also performed in a coupled channel calculation and the resultantmass is much closer to its experimental value than the result without vectormeson contribution. This approach can be applied to the future study ofmulti-quark systems.

Quark model with Hidden Local Symmetry and its application to $T_{cc}$