Double-heavy tetraquarks with strangeness in the chiral quark model*

Abstract

Abstract Recently, some progress has been made in the experiments on double-heavy tetraquarks, such as reported by the LHCb Collaboration and reported by the Belle Collaboration. Coming on the heels of our previous work about and , we present a study on the bound and resonance states of their companions, ( ) tetraquarks with strange flavor in the chiral quark model. Two pictures, meson-meson and diquark-antidiquark ones, and their couplings were considered in our calculations. Isospin violation was neglected herein. Our numerical analysis indicated that the states with and with are the most promising stable states against strong interactions. Besides, we found several resonance states for the double-heavy strange tetraquarks with the real scaling method.