We investigate the hidden-charm pentaquarks as a \(\varLambda _c{\bar{D}}^{(*)}-\varSigma _c^{(*)}{\bar{D}}^{(*)}\) hadronic molecule coupling to a compact five-quark state. The coupling to the compact state leads to an hadron short-range interaction generating an attraction. In addition, the one pion exchange potential (OPEP) as a long-range interaction is introduced by the Lagrangians satisfying the chiral and heavy quark spin symmetries. The OPEP has been known as a driving force to bind atomic nuclei, where the tensor term leading the coupled-channel effect generates a strong attraction. The mass degeneracy of heavy hadrons due to the heavy quark spin symmetry enhances the OPEP derived by the \(\pi D^{(*)}{\bar{D}}^{(*)}\) and \(\pi \varSigma _c^{(*)}\varSigma _c^{(*)}\) couplings. Introducing those interactions, we consistently explain the masses and widths of the \(P_c\) states reported by LHCb in 2019. The short range interaction has a dominant role to determine the energy-level structures, while the OPEP tensor term does the decay width.

我们将隐藏魅力五夸克作为\(\varLambda _c{\bar{D}}^{(*)}-\varSigma _c^{(*)}{\bar{D}}^{(*)} \)强子分子耦合到紧凑的五夸克态。与紧致态的耦合导致强子短程相互作用产生吸引力。此外，满足手性和重夸克自旋对称性的拉格朗日量引入了作为长程相互作用的单介子交换势（OPEP）。OPEP 被认为是结合原子核的驱动力，其中导致耦合通道效应的张量项产生强烈的吸引力。由于重夸克自旋对称性引起的重强子的质量简并增强了由\(\pi D^{(*)}{\bar{D}}^{(*)}\)和\(\pi \varSigma _c^{(*)}\varSigma _c^{(*)}\)耦合。引入这些相互作用，我们始终如一地解释了LHCb 在 2019 年报告的\(P_c\)状态的质量和宽度。短程相互作用在确定能级结构方面起主导作用，而 OPEP 张量项则负责衰减宽度.