Hadronic light-by-light contribution to the muon g-2 from holographic QCD with solved U(1)A problem

被引：19

作者：

Leutgeb, Josef ^{[1
]}

Mager, Jonas ^{[1
]}

Rebhan, Anton ^{[1
]}

机构：

[1] Tech Univ Wien, Inst Theoret Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria

来源：

PHYSICAL REVIEW D | 2023年 / 107卷 / 05期

基金：

奥地利科学基金会;

关键词：

ANOMALOUS MAGNETIC-MOMENT; CHIRAL-SYMMETRY BREAKING; FIELD-THEORIES;

D O I：

10.1103/PhysRevD.107.054021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We employ the comparatively minimal extension of hard-wall AdS/QCD due to Katz and Schwartz which takes into account the U(1)A anomaly for computing hadronic light-by-light scattering contributions of pseudoscalar and axial-vector mesons to the anomalous magnetic moment of the muon a mu. By including a gluon condensate as one extra tunable parameter besides those fixed by f pi and the pion, kaon, and rho masses, we obtain remarkably accurate fits for eta and eta 0 masses and their decay rates to photons, leading to a mu contributions in complete agreement with the Standard Model result by the Muon g - 2 Theory Initiative. Turning to the less well understood axial-vector contributions, we update our previous predictions obtained in flavor-symmetric hard-wall AdS/QCD models without U(1)A breaking.

引用

页数：13

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