论文标题
炭样和全链四夸克光谱的研究
Study of charmonium-like and fully-charm tetraquark spectroscopy
论文作者
论文摘要
所有$ qc \ bar q \ bar c $和$ cc \ bar c \ bar c $ quark配置的四夸克状态的群众均在组成夸克模型中评估，其中采用了康奈尔式的潜力和单格隆式旋转旋转旋转耦合耦合。所有模型参数都是通过比较光，迷人和底部介子的理论和实验质量来预先确定的。将charmoniumlium样的四夸克人的理论预测与观察到的$ xyz $状态进行了比较，并提出了一个试探性分配。这项工作表明，LHCB观察到的$ x（6900）$可能是第一个径向兴奋的完全兴奋的全链tetraquark State，其$ j^{pc} = 1^{+ - } $在$ \ bar 3_c \ otimes 3_c $配置中，以及$ 6的$ 63 3_c $ undimimes 3_c $ and $ 64的$ 6494 $ 644。 分别。
The masses of tetraquark states of all $qc\bar q \bar c$ and $cc\bar c \bar c$ quark configurations are evaluated in a constituent quark model, where the Cornell-like potential and one-gluon exchange spin-spin coupling are employed. All model parameters are predetermined by comparing the theoretical and experimental masses of light, charmed and bottom mesons. The theoretical predictions of the charmoniumlike tetraquarks are compared with the observed $XYZ$ states, and one tentative assignment is suggested. The work suggests that the $X(6900)$ observed by LHCb is likely to be the first radial excited fully-charm tetraquark state with $J^{PC} = 1^{+-}$ in the $\bar 3_c \otimes 3_c$ configuration, and the ground and second radial excited states of fully-charm tetraquark are around $6494$ and $7253$ MeV respectively.
