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arXiv 1111.0417hep-lat
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有限体积中的手征插值

Chiral interpolation in a finite volume

JLQCD Collaboration, H. Fukaya, S. Aoki, S. Hashimoto, T. Kaneko, H. Matsufuru, J. Noaki, T. Onogi, N. Yamada

摘要:

在\sim 2 fm的小晶格尺寸上,在物理π介子质量(甚至更低)处模拟格点量子色动力学是可行的。然而,结果受到大的有限体积效应的影响。为了精确地理解有限体积中的手征行为,我们发展了一种新的计算方案,将手征微扰理论中的传统的π和p区域插值。在这个新的计划中,我们计算的两点函数的赝标量信道,这是描述了一组贝塞尔函数在红外有限的方式,如在p-regime,而手征对数效应保持明显的p制度。新的ChPT公式进行了比较,我们的2+1味格点量子色动力学数据附近的物理上和下夸克质量,泥浆\sim 3 MeV的L \sim 1.8 fm晶格。我们提取的π介子质量= 99(4)MeV,从中我们试图手征的“插值”的物理点的观察。

英文摘要:

A simulation of lattice QCD at (or even below) the physical pion mass is feasible on a small lattice size of \sim 2 fm. The results are, however, subject to large finite volume effects. In order to precisely understand the chiral behavior in a finite volume, we develop a new computational scheme to interpolate the conventional epsilon and p regimes within chiral perturbation theory. In this new scheme, we calculate the two-point function in the pseudoscalar channel, which is described by a set of Bessel functions in an infra-red finite way as in the epsilon regime, while chiral logarithmic effects are kept manifest as in the p regime. The new ChPT formula is compared to our 2+1- flavor lattice QCD data near the physical up and down quark mass, mud \sim 3 MeV on an L \sim 1.8 fm lattice. We extract the pion mass = 99(4) MeV, from which we attempt a chiral "interpolation" of the observables to the physical point.

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。

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