Masses of light tetraquarks and scalar mesons in the relativistic quark model

TL;DR

This paper calculates the masses of light tetraquarks using a relativistic quark model, supporting the interpretation of certain scalar mesons as tetraquark states.

Contribution

It introduces a relativistic diquark-antidiquark model that accounts for diquark structure via form factors, providing mass predictions consistent with observed scalar mesons.

Findings

Scalar mesons below 1 GeV match tetraquark predictions

The model accurately reproduces masses of f0(600), K*0(800), f0(980), a0(980)

Supports tetraquark interpretation of light scalar mesons

Abstract

Masses of the ground state light tetraquarks are dynamically calculated in the framework of the relativistic diquark-antidiquark picture. The internal structure of the diquark is taken into account by calculating the form factor of the diquark-gluon interaction in terms of the overlap integral of the diquark wave functions. It is found that scalar mesons with masses below 1 GeV: f_0(600) (\sigma), K^*_0(800) (\kappa), f_0(980) and a_0(980) agree well with the light tetraquark interpretation.