Lattice calculation of the π0, η and η' transition form factors and the hadronic light-by-light contribution to the muon g-2

被引：4

作者：

Gerardin, Antoine ^{[1
]}

Verplanke, Willem E. A. ^{[1
]}

Wang, Gen ^{[1
]}

Fodor, Zoltan ^{[2
,3
,4
,5
]}

Guenther, Jana N. ^{[2
]}

Lellouch, Laurent ^{[1
]}

Szabo, Kalman K. ^{[2
,3
]}

Varnhorst, Lukas ^{[2
]}

机构：

[1] Aix Marseille Univ, Univ Toulon, CNRS, CPT, F-13009 Marseille, France

[2] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany

[3] Forschungszentrum Julich, Julich Supercomp Ctr, D-52428 Julich, Germany

[4] Eotvos Lorand Univ, Inst Theoret Phys, H-1117 Budapest, Hungary

[5] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW D | 2025年 / 111卷 / 05期

关键词：

EXCLUSIVE PROCESSES; QCD; PHOTON; MESON; WIDTH;

D O I：

10.1103/PhysRevD.111.054511

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we present a first ab initio calculation of the 0, rl and rl' transition form factors performed with physical light-quark masses. We provide a complete parametrization of the form factors that includes both single and double-virtual kinematics. Our results are compared with experimental measurements of the form factors in the spacelike region and with the measured two-photon decay widths. In a second step, our parametrizations of the transition form factors are used to compute the dominant pseudoscalar-pole contributions to the hadronic light-by-light scattering in the muon g - 2. Our final result reads ahlbl;ps-pole mu = (85.1 + 5.2) x 10-11. Although the pion-pole is dominant, we confirm that, together, the rl and rl' provide roughly half of its contribution.

引用

页数：24

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