论文标题
手性有效场理论中的分子四夸克和五夸克
Molecular tetraquarks and pentaquarks in chiral effective field theory
论文作者
论文摘要
我们研究了$ d \ bar {d}^\ ast/\ bar {d} d^\ ast $，$ d^\ ast \ ast \ bar {d}^\ ast $，$ \ bar {d} _s d} _s d^\ ast/ast/ast/\ ast/\ bar {d} d} $ b \ bar {b}^\ ast/\ bar {b} b^\ ast $和$ b^\ ast \ ast \ bar {b}^\ ast $ di-hadron相互作用在手性有效领域理论（$χ$ eft）中，直到下一次登陆（NLO）顺序。阈值tetraquark $ z_c（3900）$，$ z_c（4020）$，$ z_ {cs}（3985）$，$ z_b（10610）$，$ z_b（10650）$可以解释为相应的Di-Hadron resonances。我们还研究了$σ_c^{（\ ast）} \ bar {d}^{（\ ast）} $交互，以研究三个隐藏的charm pentaquarks $ p_c（4312）$，$ p_c（4440）$ p_c（4440）$和$ p_c（4457）$。我们进一步使用了从$ P_C $状态固定的参数来预测$ξ_c\ bar \ bar {d}^{（\ ast）} $，$ξ_c^\ prime \ bar {d}^}^{（\ ast）} $ and $ξ_c^\ ast arsts^arst {d} {d}^{（我们对$ξ_c\ bar {d}^{（\ ast）} $绑定状态的预测与LHCB协作最近观察到的两个新的接近阈值结构非常一致。
We studied the $D\bar{D}^\ast/\bar{D}D^\ast$, $D^\ast\bar{D}^\ast$, $\bar{D}_s D^\ast/\bar{D}_s^\ast D$, $B\bar{B}^\ast/\bar{B}B^\ast$ and $B^\ast\bar{B}^\ast$ di-hadron interactions in chiral effective field theory ($χ$EFT) up to the next-to-leading (NLO) order. The above-threshold tetraquark states $Z_c(3900)$, $Z_c(4020)$, $Z_{cs}(3985)$, $Z_b(10610)$, $Z_b(10650)$ can be explained as the corresponding di-hadron resonances, respectively. We also studied the $Σ_c^{(\ast)}\bar{D}^{(\ast)}$ interactions to investigate the three hidden-charm pentaquarks $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$. We further used the parameters fixed from the $P_c$ states to predict the possible molecular states in $Ξ_c\bar{D}^{(\ast)}$, $Ξ_c^\prime\bar{D}^{(\ast)}$ and $Ξ_c^\ast\bar{D}^{(\ast)}$ systems. Our predictions of the $Ξ_c\bar{D}^{(\ast)}$ bound states are very consistent with two new near-threshold structures recently observed by the LHCb Collaboration.
