标题： S波味单态介子混合在包含轻夸克和魅夸克的QCD中 显示英文标题

标题： S-wave flavor-singlet meson mixing in QCD with light and charm quarks

摘要： 我们研究了S波通道中味单态轻介子和底重夸克介子算符之间的混合，即赝标量和矢量通道，在两种不同的介子质量下进行。 我们测量了具有不同夸克内容的算符之间的统计显著非零相关性，对应于味单态混合相关矩阵的非对角项。 通过求解广义特征值问题，我们提取了低能谱，并将其与通过不同类型的算符单独获得的结果进行比较。 我们还计算了由不同算符产生的状态与理论能量本征态之间的重叠，并发现所有类型的算符都对解析感兴趣的状态有贡献。 显示英文摘要

摘要： We investigate the mixing between flavor-singlet light meson and charmonium operators in the S-wave channels, i.e. pseudo-scalar and vector channel, at two different pion masses. We measure statistically significant non-zero correlations between operators with different quark content corresponding to off-diagonal entries of a flavor-singlet mixing correlation matrix. By solving a GEVP we extract the low-lying energy spectrum and compare it with the one obtained by the different types of operators separately. We also calculate the overlaps between the states created by different operators and the energy eigenstates of the theory and find that all types of operators contribute to resolve the states of interest.