Determination of parameters of a potential model for tetraquark study by studying all S-wave mesons

TL;DR

This paper develops a constituent quark model with a Cornell-like potential and spin interactions, introducing mass-dependent couplings to accurately evaluate S-wave meson masses across light and heavy sectors.

Contribution

It presents a unified parameter set for a potential model applicable to both light and heavy mesons, enabling studies of higher states and multiquark systems.

Findings

Model accurately reproduces low-lying S-wave meson masses

Introduces mass-dependent coupling coefficients for broad applicability

Parameters are fitted to experimental data

Abstract

The masses of low-lying S-wave mesons are evaluated in a constituent quark model (CQM) where the Cornell-like potential and one-gluon exchange spin-spin interaction are employed. To make the model applicable to both the light and heavy quark sectors, we introduce mass-dependent coupling coefficients. There are four free parameters in the model, which are determined by comparing the theoretical results with experimental data. The established model with one set of parameters may be applied to study higher excited meson states as well as multiquark systems in both the light and heavy quark sectors.