The low-lying hidden- and double-charm tetraquark states in a constituent quark model with Instanton-induced Interaction

TL;DR

This study explores low-lying hidden- and double-charm tetraquark states using a nonrelativistic quark model with instanton-induced interactions, revealing potential tetraquark components in observed exotic mesons.

Contribution

It introduces a nonrelativistic quark potential model incorporating instanton-induced interactions to analyze tetraquark spectra, fitting parameters to known hadron states.

Findings

Some tetraquark masses are close to experimental exotic meson candidates.

Results suggest significant tetraquark components in observed exotic states.

Model successfully reproduces ground hadron spectra.

Abstract

Spectrum of the low-lying hidden- and double-charm tetraquark states are investigated in a nonrelativistic quark potential model, where the Instanton-induced interaction is taken as the residual spin-dependent hyperfine interaction between quarks. The model parameters are fixed by fitting the spectrum of the ground hadron states. Our numerical results show that masses of several presently studied tetraquark states are close to those of the experimentally observed candidates of exotic meson, which indicates that the corresponding compact tetraquark components may take considerable probabilities in those observed exotic states.