Complete Dispersive Evaluation of the Hadronic Light-by-Light Contribution to Muon g−2

IF 9 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physical review letters Pub Date : 2025-02-11 DOI:10.1103/physrevlett.134.061902

Martin Hoferichter, Peter Stoffer, Maximilian Zillinger

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引用次数: 0

Abstract

Hadronic light-by-light (HLbL) scattering defines one of the critical contributions in the Standard Model prediction of the anomalous magnetic moment of the muon. In this Letter, we present a complete evaluation using a dispersive formalism, in which the HLbL tensor is reconstructed from its discontinuities, expressed in terms of simpler hadronic matrix elements that can be extracted from experiment. Profiting from recent developments in the determination of axial-vector transition form factors, short-distance constraints for the HLbL tensor, and the vector–vector–axial-vector correlator, we obtain aμHLbL=101.9(7.9)×10−11, which meets the precision requirements set by the final result of the Fermilab experiment.

Published by the American Physical Society

2025

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强子光对μ子g−2贡献的完全色散评估

强子光对光（HLbL）散射定义了标准模型预测μ子异常磁矩的关键贡献之一。在这封信中，我们提出了一个使用色散形式的完整评估，其中HLbL张量是从它的不连续中重建的，用可以从实验中提取的更简单的强子矩阵元素来表示。利用最近在确定轴-矢量转换形式因子、HLbL张量的短距离约束和矢量-矢量-轴-矢量相关器方面的进展，我们得到了aμHLbL=101.9（7.9）×10−11，满足费米实验室最终实验结果的精度要求。2025年由美国物理学会出版

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks