Gluonic Hidden-charm Tetraquark States

TL;DR

This paper investigates a new class of hybrid gluonic hidden-charm tetraquark states using QCD sum rules, predicting their mass spectrum, possible existence, and experimental signatures.

Contribution

It introduces a novel type of gluonic tetraquark states and evaluates their mass spectrum and properties within the QCD sum rule framework.

Findings

Predicted 14 gluonic hidden-charm tetraquark states.

Evaluated their mass spectrum and quantum numbers.

Suggested possible experimental detection channels.

Abstract

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.