Fully heavy pentaquarks in quark models

Abstract

The fully heavy pentaquarks $cccc\bar{c}$ and $bbbb\bar{b}$ are systematically investigated within the chiral quark model and quark delocalization color screening model. The results are consistent in both two moelds, and the effect of the channel-coupling is crucial for forming a bound state of the fully heavy pentaquark system. Three possible fully heavy pentaquarks are obtained, which are the $cccc\bar{c}$ state with $J^P=1/2^{-}$ and the mass of $7891.9\sim 7892.7$ MeV, the $bbbb\bar{b}$ state with $J^P=1/2^{-}$ and the mass of $23810.1\sim 23813.8$ MeV, and the $bbbb\bar{b}$ state with $J^P=3/2^{-}$ and the mass of $23748.2\sim 23752.3$ MeV. All these fully heavy pentaquark states are worth searching in future experiments.

Comments: 8 pages, 7 figures. arXiv admin note: text overlap with arXiv:2006.13745