Gluonic hidden-charm tetraquark states

In this paper, a new type of hybrid state, which consists of two valence quarks and two valence antiquarks together with a valence gluon, the gluonic tetraquark states, are investigated. Twenty-four currents of the the gluonic hidden-charm tetraquark states in \([\bar{3}_c]_{c q}\otimes [8_c]_{G}\otimes [3_c]_{\bar{c} \bar{q^\prime }}\) configuration are constructed, and their mass spectrum are evaluated in the framework of QCD sum rules with quantum numbers of \(J^P=0^{+}\), \(0^{-}\), \(1^{-}\), and \(1^{+}\). The nonperturbative contributions up to dimension 8 are taken into account. The results indicate that there may be exist 14 gluonic hidden-charm tetraquark states, and their corresponding hidden-bottom partners are also evaluated. The possible production and decay modes of the gluonic tetraquark states are analyzed, which are hopefully measurable in BESIII, BELLEII, PANDA, Super-B, and LHCb experiments.