论文标题
$ p_c（4312）$ pentaquark及其底部合作伙伴的属性
Properties of $P_c(4312)$ pentaquark and its bottom partner
论文作者
论文摘要
我们对新观察到的pentaquark $ p_c（4312）^+$进行了分析，以阐明其量子数。为此，使用了QCD总规则方法。该粒子的测得的质量接近$σ_c^{++} \ bar {d}^ - $阈值，并且宽度很小，这支持了它是分子状态的可能性。我们考虑以分子形式的插值电流，并用自旋 - $ \ frac {1} {2} $分析正均等状态。我们还考虑具有相似分子形式的状态的底部。我们对魅力pentaquark状态的质量结果支持，即观察到的状态的量子数与$ j^p = \ frac {1} {2} {2}^{ - } $一致。
We present an analysis of the newly observed pentaquark $P_c(4312)^+$ to shed light on its quantum numbers. To do that, the QCD sum rule approach is used. The measured mass of this particle is close to $Σ_c^{++}\bar{D}^-$ threshold and has a small width, which supports the possibility of its being a molecular state. We consider an interpolating current in a molecular form and analyze both the positive and negative parity states with spin-$\frac{1}{2}$. We also consider the bottom counterpart of the state with similar molecular form. Our mass result for the charm pentaquark state supports that, the quantum numbers of the observed state are consistent with $J^P=\frac{1}{2}^{-}$.
