论文标题
标量完全沉重的tetraquark状态$ qq^\ prime \ bar {q} \ bar {q^\ prime} $ in qcd sum规则
Scalar Fully-heavy Tetraquark States $QQ^\prime \bar{Q} \bar{Q^\prime}$ in QCD Sum Rules
论文作者
论文摘要
最近，LHCB合作在$ cc \ bar {c} \ bar {c} $中观察到了不同的结构，$ j/ψ$ - pair质量谱。在这项工作中，我们构造了四个标量（$ j^{pc} = 0^{++} $）$ [8_c] _ {q \ bar {q^\ prime}} \ otimes [8_c] _ {q^\ prime \ bar {q}} $ type cournes Q^q qurents q^q q qurtions q^q qurents \ bar {q^\ prime} $在QCD总规则的框架中，其中$ q = c，b $和$ q^\ prime = c，b $。我们的结果表明，大约6.2-6.8 GEV的广泛结构可以解释为$ 0^{++} $ octet-octet tetraquark州的群众$ 6.44 \ pm 0.11 $ 0.11 $ gev和$ 6.52 \ pm 0.10 $ gev gev，狭窄的结构约为$ 6.9 $ 6.9 $ 6.9 $ 6.9 $ 0^$ 0^$ octetr， $ 6.87 \ pm 0.11 $ gev和$ 6.96 \ pm 0.11 $ gev，endivley。延伸到B Quark领域，发现其全下方伙伴的群众被发现约为18.38-18.59 GEV。此外，我们还分析了$ [c \ bar {c}]的光谱[b \ bar {b}] $和$ [c \ bar {b}] [b \ bar {c}] $ tetraquark State，分别位于12.51-12.74 GEV范围内，分别为12.51-12.74 GEV和12.49-49-12.81 GEV。
Very recently, the LHCb Collaboration observed distinct structures with the $cc\bar{c}\bar{c}$ in the $J/Ψ$-pair mass spectrum. In this work, we construct four scalar ($J^{PC} = 0^{++}$) $[8_c]_{Q\bar{Q^\prime}}\otimes [8_c]_{Q^\prime \bar{Q}}$ type currents to investigate the fully-heavy tetraquark state $Q Q^\prime \bar{Q} \bar{Q^\prime}$ in the framework of QCD sum rules, where $Q=c, b$ and $Q^\prime = c, b$. Our results suggest that the broad structure around 6.2-6.8 GeV can be interpreted as the $0^{++}$ octet-octet tetraquark states with masses $6.44\pm 0.11$ GeV and $6.52\pm 0.10$ GeV, and the narrow structure around $6.9$ GeV can be interpreted as the $0^{++}$ octet-octet tetraquark states with masses $6.87\pm 0.11$ GeV and $6.96\pm 0.11$ GeV, respectivley. Extending to the b-quark sector,the masses of their fully-bottom partners are found to be around 18.38-18.59 GeV. Additionally, we also analyze the spectra of the $[c\bar{c}][b\bar{b}]$ and $[c\bar{b}] [b \bar{c}]$ tetraquark states, which lie in the range of 12.51-12.74 GeV and 12.49-12.81 GeV, respectively.
