We study strong decays of the possible fully-charm tetraquarks recently observed by LHCb, and calculate their relative branching ratios through the Fierz rearrangement. Together with our previous QCD sum rule study, our results suggest that the broad structure around 6.2–6.8 GeV can be interpreted as an S-wave $\mathit{cc}\overline{c}\overline{c}$ tetraquark state with $J^{\mathit{PC}}=0^{++}$ or $2^{++}$, and the narrow structure around 6.9 GeV can be interpreted as a P-wave one with $J^{\mathit{PC}}=0^{-+}$ or $1^{-+}$. These structures were observed in the di-$J/\psi$ invariant mass spectrum, and we propose to confirm them in the di-${\eta }_c,J/\psi h_c,{\eta }_c{\chi }_{c0}$, and ${\eta }_c{\chi }_{c1}$ channels. We also propose to search for their partner states having the negative charge-conjugation parity in the $J/\psi {\eta }_c,J/\psi {\chi }_{c0},J/\psi {\chi }_{c1}$, and ${\eta }_c{h}_c$ channels.

我们研究了 LHCb 最近观察到的可能的全魅力四夸克的强衰变，并通过 Fierz 重排计算了它们的相对分支比。连同我们之前的 QCD 和规则研究，我们的结果表明 6.2–6.8 GeV 附近的宽结构可以解释为S波$\mathit{抄送}\overline{C}\overline{C}$四夸克态与${杰}^{\mathit{个人电脑}}=0^{++}$或者${\mathrm{2个}}^{++}$，而 6.9 GeV 附近的窄结构可以解释为P波${杰}^{\mathit{个人电脑}}=0^{-+}$或者${\mathrm{1个}}^{-+}$. 这些结构在 di-$杰/\psi$不变的质谱，我们建议在 di- 中确认它们${\eta }_C,杰/\psi H_C,{\eta }_C{\chi }_{C0}$， 和${\eta }_C{\chi }_{C\mathrm{1个}}$渠道。我们还建议在$杰/\psi {\eta }_C,杰/\psi {\chi }_{C0},杰/\psi {\chi }_{C\mathrm{1个}}$， 和${\eta }_C{H}_C$渠道。