Fully heavy pentaquark states

Abstract

Developing the calculation techniques to fivefold heavy hadrons, we perform the study of novel fully heavy $QQQQ\overline{Q}$ pentaquark states by the QCD sum rule approach that is firmly based on the QCD basic theory. Numerically, masses of fully heavy pentaquark states are calculated to be ${7.41}_{\ensuremath{-}0.31}^{+0.27}\text{ }\text{ }\mathrm{GeV}$ for $cccc\overline{c}$ and ${21.60}_{\ensuremath{-}0.22}^{+0.73}\text{ }\text{ }\mathrm{GeV}$ for $bbbb\overline{b}$, respectively. In experiment, these predicted all-heavy pentaquark states could be searched for in the ${\mathrm{\ensuremath{\Omega}}}_{QQQ}{\ensuremath{\eta}}_{Q}$ invariant mass spectrum.

Topics & Concepts