Searching for fully-heavy tetraquark states in QCD moment sum rules

TL;DR

This paper investigates the mass spectra of fully-heavy tetraquark states using QCD moment sum rules, predicting possible resonances like X(6900) and suggesting their quantum numbers, with implications for future experimental detection.

Contribution

The study applies QCD moment sum rules to predict masses and quantum numbers of fully-heavy tetraquark states, including the X(6900) resonance, advancing theoretical understanding.

Findings

Predicted existence of di-J/psi resonances including X(6900)

Suggested quantum numbers for these resonances

Indicated potential observation at LHCb, CMS, and RHIC

Abstract

In this talk, we briefly report the investigations of the mass spectra for the $cc\bar c\bar c, bb\bar b\bar b$, $bc\bar b\bar c$ and $cc\bar b\bar b$ tetraquark states by using the QCD moment sum rule method. The calculations for the fully-charm $cc\bar c\bar c$ tetraquarks have been successfully predicted the existence of di-$J/\psi$ resonances including $X(6900)$ in LHCb's observation. The quantum numbers for these resonance structures are also suggested. More efforts are still needed in both theoretical and experimental aspects to study the properties of these fully-heavy tetraquark states. They may be observed at facilities such as LHCb, CMS and RHIC in the future.