Year: 2026
Type: article
Abstract: We investigate gluonic hidden-charm tetraquark states composed of two valence quarks, two valence antiquarks and an explicit valence gluon. In the color configuration $$[\bar{3}_c]_{c q}\otimes [8_c]_{G}\otimes [3_c]_{\bar{c}\bar{q}}$$ [ 3 ¯ c ] cq ⊗ [ 8 c ] G ⊗ [ 3 c ] c ¯ q ¯ , a complete set of eight interpolating currents is constructed for states with quantum numbers $$^{PC}=0^{++}$$ PC = 0 + + , $$0^{-+},$$ 0 - + , $$0^{-}{-}$$ 0 - - , and $$0^{+-}$$ 0 + - . The corresponding mass spectra are systematically analysed within the QCD sum rule framework, including nonperturbative condensate contributions up to dimension eight. Our numerical analysis indicates the possible existence of six gluonic hidden-charm tetraquark states exhibiting stable behaviour in the adopted Borel windows. By replacing the charm quark with the bottom quark, masses for the corresponding hidden-bottom partners are also estimated. Possible production mechanisms and dominant decay channels are discussed, providing phenomenological guidance for experimental searches. These predicted states may be accessible at current and forthcoming facilities, including Belle II, PANDA, SuperB and LHCb, and thus offer an opportunity to probe explicit gluonic degrees of freedom in multiquark systems and deepen our understanding of nonperturbative QCD.
Source: The European Physical Journal C
Authors: Bing-Dong Wan, Ming-Yang Yuan, Jun-Hao Zhang, Yan Zhang
Institution: Liaoning Normal University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G3884907110, G4654095770
OpenAlex ID: W4417448216