Systematical investigation on the stability of doubly heavy tetraquark states

TL;DR

This paper conducts a systematic theoretical investigation into the stability of doubly heavy tetraquark states using a color flux-tube model, identifying several promising stable configurations against strong decay.

Contribution

It introduces a comprehensive analysis of doubly heavy tetraquark stability within the color flux-tube framework, highlighting specific stable states and their quantum numbers as new predictions.

Findings

Identifies $[bb][ar{u}ar{d}]$ with $01^+$ as a promising stable state.

Predicts multiple stable tetraquark states with various quantum numbers.

Provides insights into the dynamical mechanisms behind tetraquark stability.

Abstract

We systematically investigate the stability of the doubly heavy tetraquark states $[QQ][\bar{q}\bar{q}]$ ($Q=c$ and $b$, $q=u$, $d$ and $s$) within the framework of the color flux-tube model involving a multibody confinement potential, $\sigma$-exchange, one-gluon-exchange and one-Goldstone-boson-exchange interactions. Our numerical analysis indicates that the states $[bb][\bar{u}\bar{d}]$ with $01^+$ and $[bb][\bar{u}\bar{s}]$ with $\frac{1}{2}1^+$ are the most promising stable states against strong interactions. The states $[cc][\bar{u}\bar{d}]$ with $01^+$, $[bc][\bar{u}\bar{d}]$ with $00^+$, $01^+$, and $12^+$, and $[bb][\bar{u}\bar{d}]$ with $01^-$ and $12^+$ as stable states are also predicted in the color flux-tube model. The dynamical mechanism producing those stable doubly heavy tetraquark states are discussed in the color flux-tube model.