2024/05/08 by Tang, Chun-Meng, Duan, Chun-Gui, Tang, Liang · 2 citations
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)
paper · doi:10.48550/arxiv.2405.05042
Stimulated by the recent experimental results on the fully-charm tetraquark states, we systematically calculate the mass spectra of the fully-charm tetraquark states in 8_[cc]⊗8_[cc] color configuration via QCD sum rules. By constructing nine 8_[cc]⊗8_[cc] type currents with quantum numbers JPC=0-+,0--,1-+,1+-,1-- and 2++, we perform analytic calculation up to dimension six in the Operator Product Expansion (OPE). We find the fully-charm tetraquark states with JPC=1+-,2++ lie around 6.48 ∼ 6.62 GeV while the fully-charm tetraquark states with JPC=0-+,0--,1--,1-+ are about 6.85 ∼ 7.02 GeV. Notably, the mass predictions for the cccc tetraquarks, specifically those with JPC=2++, align with the broad structure identified by LHCb. Moreover, the masses of fully-charm tetraquarks with JPC=0-+ and 1-+ are anticipated to match closely with the mass of X(6900), considering the margin of error. Such findings hint at the presence of some 8_[cc]⊗8_[cc] components within the di-J/ψ structures observed by LHCb. The predictions for tetraquark states with JPC=0--,1+-,1-- may be accessible in the future BelleII, Super-B, PANDA, and LHCb experiments.