arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1710.04479hep-lathep-ph
收藏

用部分猝灭手征微扰理论研究有限体积中的矢量两点函数

Vector two-point functions in finite volume using partially quenched chiral perturbation theory

Johan Bijnens, Johan Relefors

摘要:

我们利用部分猝灭手征微扰理论,包括有限体积效应和扭曲边界条件,计算了两个环上的矢量-矢量关联函数。我们提出的表达式的味道中性的情况下,味荷的情况下,具有相同的质量。使用这些表达式,我们给出了电磁电流奇异部分的断开贡献与连接贡献之比的估计。我们给出了部分淬火、有限体积效应和扭曲效应的数值例子,并建议使用不同的扭曲来检查有限体积效应的大小。这一工作的主要用途是用于强子真空极化对μ子反常磁矩贡献的格点量子色动力学计算。

英文摘要:

We calculate vector-vector correlation functions at two loops using partially quenched chiral perturbation theory including finite volume effects and twisted boundary conditions. We present expressions for the flavor neutral cases and the flavor charged case with equal masses. Using these expressions we give an estimate for the ratio of disconnected to connected contributions for the strange part of the electromagnetic current. We give numerical examples for the effects of partial quenching, finite volume and twisting and suggest the use of different twists to check the size of finite volume effects. The main use of this work is expected to be for lattice QCD calculations of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑