Lattice QCD Calculation of Hadronic Light-by-Light Scattering

被引：56

作者：

Green, Jeremy ^{[1
,2
]}

Gryniuk, Oleksii ^{[1
,2
,4
]}

von Hippel, Georg ^{[1
,2
]}

Meyer, Harvey B. ^{[1
,2
,3
]}

Pascalutsa, Vladimir ^{[1
,2
]}

机构：

[1] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[3] Helmholtz Inst Mainz, D-55099 Mainz, Germany

[4] Taras Shevchenko Kyiv Natl Univ, UA-01033 Kiev, Ukraine

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 22期

关键词：

Numerical methods - Magnetic moments - Quantum theory - Hadrons - Forward scattering;

D O I：

10.1103/PhysRevLett.115.222003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform a lattice QCD calculation of the hadronic light-by-light scattering amplitude in a broad kinematical range. At forward kinematics, the results are compared to a phenomenological analysis based on dispersive sum rules for light-by-light scattering. The size of the pion pole contribution is investigated for momenta of typical hadronic size. The presented numerical methods can be used to compute the hadronic light-by-light contribution to the anomalous magnetic moment of the muon. Our calculations are carried out in two-flavor QCD with the pion mass in the range of 270-450 MeV and contain so far only the diagrams with fully connected quark lines.

引用

页数：5

共 22 条

[1]

[Anonymous], ARXIV13112198

[2] Neutral pion lifetime measurements and the QCD chiral anomaly [J].