标题： 介子-介子散射长度在最大同位旋下从格点QCD 显示英文标题

标题： Meson-meson scattering lengths at maximum isospin from lattice QCD

摘要： 我们总结了在最大同位旋下介子-介子、介子-奇异介子和奇异介子-奇异介子s波散射长度的格点QCD确定结果，特别关注向物理点的外推以及使用下一阶手征微扰理论进行外推。 我们在三个格点间距值和介子质量范围从约230 MeV到约450 MeV的数据上进行研究，应用卢舍尔的有限体积方法计算散射长度。 我们发现，在整个介子质量范围内，即使在奇异介子-奇异介子情况下，一阶手征微扰理论与我们的数据也非常接近。 显示英文摘要

摘要： We summarize our lattice QCD determinations of the pion-pion, pion-kaon and kaon-kaon s-wave scattering lengths at maximal isospin with a particular focus on the extrapolation to the physical point and the usage of next-to-leading order chiral perturbation theory to do so. We employ data at three values of the lattice spacing and pion masses ranging from around 230 MeV to around 450 MeV, applying Luescher's finite volume method to compute the scattering lengths. We find that leading order chiral perturbation theory is surprisingly close to our data even in the kaon-kaon case for our entire range of pion masses.