基于格点QCD的最大同位旋介子-介子散射长度
高能物理 - 格点
2021-02-02 v3 高能物理 - 唯象学
核理论
摘要
我们总结了在最大同位旋下pion-pion、pion-kaon和kaon-kaon s波散射长度的格点QCD确定，特别关注向物理点的外推以及使用次领头阶手征微扰理论来进行此外推。我们采用三个格点间距值和范围约230 MeV至约450 MeV的pion质量的数据，应用Luescher有限体积方法计算散射长度。我们发现，即便在kaon-kaon情形中，对于我们整个pion质量范围，领头阶手征微扰理论也惊人地接近我们的数据。
引用
@article{arxiv.1904.00191,
title = {Meson-meson scattering lengths at maximum isospin from lattice QCD},
author = {Christopher Helmes and Christian Jost and Bastian Knippschild and Bartosz Kostrzewa and Liuming Liu and Ferenc Pittler and Carsten Urbach and Markus Werner},
journal= {arXiv preprint arXiv:1904.00191},
year = {2021}
}
备注
10 pages, 8 figures, Presented at the 9th International Workshop on Chiral Dynamics, Sept. 17-21, 2018, Duke University, Durham, NC, USA , submitted to PoS, (C18-09-17.6). Funding acknowledgements added in v2 replacement, comma added in abstract. In v3 replacement, corrected typo in equation 6.2 which was referring to the pion-kaon reduced mass instead of the pion mass