文章基本信息

标题：Meson-meson scattering lengths at maximum isospin from lattice QCD
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作者：C.Helmes ; C.Jost ; B.Knippschild 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2018
卷号：317
DOI：10.22323/1.317.0071
语种：English
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
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.