Static-static-light-light tetraquarks in lattice QCD

TL;DR

This paper uses lattice QCD to compute the energy of a system of two light quarks and two static antiquarks, exploring the potential for bound tetraquark states relevant to B mesons.

Contribution

The study provides the first lattice QCD calculations of static-light tetraquark systems, analyzing their energies across various quantum channels to assess bound state formation.

Findings

Identified energy levels suggest possible bound tetraquark states in certain channels.

Provided potential energy profiles for B meson pairs at different separations.

Contributed to understanding the nature of exotic hadrons in QCD.

Abstract

I report on a lattice computation of the energy of a system of two light quarks and two static antiquarks as a function of the separation of the static antiquarks. In terms of hadrons such a system corresponds to a pair of B mesons and its energy to the hadronic potential. I present selected results for different isospin, spin and parity combinations of the individual B mesons mainly focusing on those channels relevant to determine, whether two B mesons may form a bound tetraquark state.