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arXiv 2008.03809hep-lathep-ph
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有效场论在$a_μ^{\rm HVP}$中有限体积效应的应用

On the application of Effective Field Theory to finite-volume effects in $a_μ^{\rm HVP}$

Christopher Aubin, Thomas Blum, Maarten Golterman, Santiago Peris

摘要:

强子真空极化对μ子反常磁矩$a_μ^{\rm HVP}$的贡献的晶格计算受到的一个重要系统效应是有限空间体积引起的畸变。为了达到百分之几的精度,这些影响需要可靠地估计和校正,并已采用这样做的方法之一是有限体积手性微扰理论。在本文中,我们认为,有限体积修正$a_μ^{\rm HVP}$,原则上,可以计算在任何给定的手征微扰理论的顺序。更准确地说,一旦定义无限体积中$a_μ^{\rm HVP}$的有效场论表示所需的所有低能常数都已知到给定的阶数,那么在手征展开中也可以预测到该阶数的有限体积校正。

英文摘要:

One of the more important systematic effects affecting lattice computations of the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, $a_μ^{\rm HVP}$, is the distortion due to a finite spatial volume. In order to reach sub-percent precision, these effects need to be reliably estimated and corrected for, and one of the methods that has been employed for doing this is finite-volume chiral perturbation theory. In this paper, we argue that finite-volume corrections to $a_μ^{\rm HVP}$ can, in principle, be calculated at any given order in chiral perturbation theory. More precisely, once all low-energy constants needed to define the Effective Field Theory representation of $a_μ^{\rm HVP}$ in infinite volume are known to a given order, also the finite-volume corrections can be predicted to that order in the chiral expansion.

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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