论文标题
首先观察晶格上的隐藏式五角星
First observation of the hidden-charm pentaquarks on lattice
论文作者
论文摘要
The s-wave scattering of $Σ_c \bar{D}$ and $Σ_c \bar{D}^*$ in the $I(J^P) = \frac{1}{2}(\frac{1}{2}^-)$ channel is calculated in lattice QCD using two ensembles with different volumes but the same lattice spacing $a\sim 0.08 \ mathrm {fm} $和pion质量$m_π\ sim 294 \ mathrm {mev} $。阈值接近阈值的散射幅度是通过Lüscher的有限体积方法获得的。我们在$σ_C\ bar {d} $和$σ_c\ bar {d}^*$ Channels中找到了绑定状态极，这可能与$ p_c（4312）$和$ p_c（4440） / p_c（4440） / p_c（4457）$ pentaquarks $ pentaquarks相关。绑定能量为$ 6（2）（2）$ MEV，对于$σ_C\ bar {d} $，$ 7（3）（1）$ MEV，$σ_C\ bar {d}^*$，第一个错误是统计错误，第二个错误是由于lattice fifactss而导致的系统错误。
The s-wave scattering of $Σ_c \bar{D}$ and $Σ_c \bar{D}^*$ in the $I(J^P) = \frac{1}{2}(\frac{1}{2}^-)$ channel is calculated in lattice QCD using two ensembles with different volumes but the same lattice spacing $a\sim 0.08\mathrm{fm}$ and pion mass $M_π\sim 294\mathrm{MeV}$. The scattering amplitudes near threshold are obtained by Lüscher's finite volume method. We find bound state poles in both $Σ_c \bar{D}$ and $Σ_c \bar{D}^*$ channels, which are possibly related to the $P_c(4312)$ and $P_c(4440) / P_c(4457)$ pentaquarks observed in experiments. The binding energy is $6(2)(2)$MeV for $Σ_c \bar{D}$ and $7(3)(1)$MeV for $Σ_c \bar{D}^*$, where the first error is the statistical error and the second is the systematic error due to the lattice artifacts.
