论文标题
评论“根据最近的晶格相位偏移，仔细检查裂缝 - 旋转散射”
Comment on "Scrutinizing pion-pion scattering in light of recent lattice phase shifts"
论文作者
论文摘要
在Xiu-li Gao，Zhi-Hui Guo，Zhiguang Xiao和Zhi-Yong Zhou的最新论文中。 Rev. D 105，094002（2022），此处称为I，$ s $ - 波$ππ$ππ$散射相位移位在lattice-qcd计算中获得的散射相移，使用色散$ s $ -mmatrix方法分析。我们质疑该分析结论的可靠性，即对于391 MEV的pion质量，晶格阶段有利于$σ$ -Meson绑定状态和附近虚拟状态的存在。我们的主要批评是涉及$ s $ - 波$ k \ bar {k} $ channel的忽视，该通道与Interpold-Channel模型相同。作为例证，也提出了这样的最新模型的一些结果。结论评论涉及I分析以及进一步的模型测试的可能改进。
In a recent paper by Xiu-Li Gao, Zhi-Hui Guo, Zhiguang Xiao, and Zhi-Yong Zhou, Phys. Rev. D 105, 094002 (2022), here referred to as I, $S$-wave $ππ$ scattering phase shifts obtained in a lattice-QCD calculation are analyzed using dispersive $S$-matrix methods. We question the reliability of the conclusion from this analysis that, for a pion mass of 391 MeV, the lattice phases favor the presence of both a $σ$-meson bound state and a nearby virtual state. Our main criticism concerns the neglect of the $S$-wave $K\bar{K}$ channel, which was considered alongside additional $s\bar{s}$ interpolating fields in the lattice computation used by the authors of I and also in typical coupled-channel models. As an illustration, some results from such a recent model are presented as well. Concluding remarks concern possible improvements of the analysis in I as well as further model tests.
