Lattice QCD study of heavy-heavy-light-light tetraquark candidates

TL;DR

This paper uses lattice QCD with NRQCD to study heavy-light tetraquark candidates, providing evidence for their existence and exploring different isospin and quantum number configurations.

Contribution

It presents the first lattice QCD investigation of heavy-light tetraquark states with finite bottom quark mass, extending previous static quark results.

Findings

Evidence for a tetraquark state at I(J^P)=0(1^+)

Investigation of I(J^P)=1(1^+) state with static bottom quarks

Analysis of heavy-light four-quark systems in lattice QCD

Abstract

We investigate heavy-light four-quark systems $ud\bar b \bar b$ with bottom quarks of finite mass which are treated in the framework of NRQCD. We focus on $I(J^P)=0(1^+)$, where we recently found evidence for the existence of a tetraquark state using static bottom quarks. Furthermore, we report on an investigation of the $u \bar d b \bar b$ four-quark system with quantum numbers $I(J^P)=1(1^+)$ again using static bottom quarks.