Analysis of the fully-heavy pentaquark states via the QCD sum rules

TL;DR

This paper uses QCD sum rules to predict the masses of fully-heavy pentaquark states, providing theoretical guidance for future experimental searches in specific invariant mass spectra.

Contribution

It introduces a novel application of QCD sum rules to fully-heavy pentaquark states, calculating their masses for the first time.

Findings

Mass of $cccc\bar{c}$ pentaquark: 7.93 ± 0.15 GeV

Mass of $bbbb\bar{b}$ pentaquark: 23.91 ± 0.15 GeV

Suggests searching in $J/\psi \Omega_{ccc}$ and $\Upsilon \Omega_{bbb}$ spectra

Abstract

In the article, we investigate the diquark-diquark-antiquark type fully-heavy pentaquark states with the spin-parity $J^P={\frac{1}{2}}^-$ via the QCD sum rules, and obtain the masses $M_{cccc\bar{c}}=7.93\pm 0.15\,\rm{GeV}$ and $M_{bbbb\bar{b}}=23.91\pm0.15\,\rm{GeV}$. We can search for the fully-heavy pentaquark states in the $J/\psi \Omega_{ccc}$ and $\Upsilon \Omega_{bbb}$ invariant mass spectrum in the future.