Spectroscopy behavior of fully heavy tetraquarks

TL;DR

This paper systematically studies the spectroscopy of fully heavy tetraquarks using a constituent quark model, providing detailed predictions on their properties and decay behaviors to guide experimental searches.

Contribution

It offers a comprehensive theoretical analysis of all possible ground fully heavy tetraquark configurations, including their spectroscopic features and decay characteristics, which has not been done before.

Findings

No stable S-wave fully heavy tetraquark states found.

Provides detailed predictions of mass, wave functions, and decay widths.

Results serve as a reference for experimental searches.

Abstract

Stimulated by the observation of the $X(6900)$ from LHCb in 2020 and the recent results from CMS and ATLAS in the di-$J/\psi$ invariant mass spectrum, in this work we systemically study all possible configurations for the ground fully heavy tetraquark states in constituent quark model. By our calculation, we present their spectroscopy behaviors like binding energy, lowest meson-meson thresholds, specific wave function, magnetic moment, transition magnetic moment, radiative decay width, rearrangement strong width ratio, internal mass contributions, relative lengths between (anti)quarks, and the spatial distribution of four valence (anti)quarks. We cannot find stable S-wave state for the fully heavy tetraquark system. We hope that our results are valuable to further explore fully heavy tetraquark states in experiment.