短距离处 (g-2)$_{\mu}$ 强子光晕对磁矩的两圈微扰修正
高能物理 - 唯象学
2021-05-12 v2
摘要
强子光晕（HLbL）对 的短距离行为近来已通过背景电磁场中的算符乘积展开加以研究。该展开的首项已被证明由无质量夸克圈给出，且非微扰修正数值上被极度压低。此处，我们计算无质量夸克圈的微扰 QCD 修正。研究发现，只要我们所研究的能量尺度上 QCD 耦合的微扰跑动定义良好，即尺度 ，该修正相对于夸克圈相当小。这应有助于减小与高多重数强子态相关的大系统不确定性。
引用
@article{arxiv.2101.09169,
title = {The two-loop perturbative correction to the (g-2)$_{\mu}$ HLbL at short distances},
author = {Johan Bijnens and Nils Hermansson-Truedsson and Laetitia Laub and Antonio Rodríguez-Sánchez},
journal= {arXiv preprint arXiv:2101.09169},
year = {2021}
}
备注
28 pages, the expressions and the many expansions that are too long are included in the supplementary files. Minor misprints corrected, short discussion about the MV limit and explicit expressions at the symmetric point added