Possible triply heavy tetraquark states

TL;DR

This study systematically investigates possible triply heavy tetraquark states using the chiral quark model, identifying several bound states and emphasizing the importance of coupled channel effects for stability against strong decays.

Contribution

It provides a comprehensive analysis of triply heavy tetraquarks considering multiple configurations and quantum numbers, revealing potential stable states.

Findings

Several bound tetraquark states are predicted.

Coupled channel effects are crucial for stability.

Some states are stable against strong decays.

Abstract

In the present work, the triply heavy tetraquarks states $QQ\bar{Q}\bar{q}$ with $Q=(c, b)$ and $q=(u, d, s)$ with all possible quantum numbers are systematically investigated in the framework of the chiral quark model with the resonance ground method. Two kinds of structures, including the meson-meson configuration (the color-singlet channels and the hidden-color channels) and the diquark-antidiquark configuration (the color sextet-antisextet and the color triplet-antitriplet), are considered. In the considered system, several bound states are obtained for the $cc\bar{c}\bar{q^{'}}$, $bb\bar{c}\bar{q^{'}}$ and $bc\bar{c}\bar{q}$ tetraquarks. From the present estimations, we find that the coupled channel effect is of great significance for forming the below thresholds tetraquark states, which are stable for strong decays.