A relativistic quark model with infrared confinement and the tetraquark state

TL;DR

This paper models the X(3872) meson as a tetraquark using a relativistic quark model with infrared confinement, successfully matching experimental decay widths and providing insights into its structure.

Contribution

It introduces a relativistic constituent quark model with infrared confinement to study the X(3872) as a tetraquark, offering a novel approach to its internal structure.

Findings

Decay widths consistent with experimental data

Infrared confinement effectively incorporated

Supports tetraquark interpretation of X(3872)

Abstract

We explore the consequences of treating the X(3872) meson as a tetraquark bound state. As dynamical framework we employ a relativistic constituent quark model which includes infrared confinement in an effective way. We calculate the hadronic decay widths of the observed channels. For reasonable values of the size parameter of the X(3872) we find consistency with the available experimental data.