Fully heavy pentaquark states from QCD sum rules

Abstract

In this work, we systematically investigate the mass spectra of fully heavy pentaquark states $QQQQ\bar{Q}$ within the framework of QCD sum rules. Employing three configurations of interpolating currents, we obtain the following mass predictions: for the $cccc\bar{c}$ states, the masses are determined to be $7.79_{-0.17}^{+0.18}$ GeV, $7.76_{-0.18}^{+0.23}$ Gev, $7.81_{-0.18}^{+0.17}$ GeV; while for the $bbbb\bar{b}$ states, the corresponding masses are calculated as $22.35_{-0.19}^{+0.19}$ GeV, $22.27_{-0.22}^{+0.22}$ GeV, $22.37_{-0.20}^{+0.18}$ GeV, respectively.

12 pages, 6 figures; version accepted for publication in Phys. Rev. D