Lattice QCD calculation of hadronic light-by-light scattering

Jeremy Green; Oleksii Gryniuk; Georg von Hippel; Harvey B. Meyer; Vladimir Pascalutsa

doi:10.1103/PhysRevLett.115.222003

Lattice QCD calculation of hadronic light-by-light scattering

High Energy Physics - Lattice 2015-12-02 v1 High Energy Physics - Phenomenology

Authors: Jeremy Green , Oleksii Gryniuk , Georg von Hippel , Harvey B. Meyer , Vladimir Pascalutsa

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Abstract

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 to 450MeV, and contain so far only the diagrams with fully connected quark lines.

Keywords

lattice QCD hadronic light-by-light scattering anomalous magnetic moment of the muon pion pole contribution dispersive sum rules two-flavor QCD

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@article{arxiv.1507.01577,
  title  = {Lattice QCD calculation of hadronic light-by-light scattering},
  author = {Jeremy Green and Oleksii Gryniuk and Georg von Hippel and Harvey B. Meyer and Vladimir Pascalutsa},
  journal= {arXiv preprint arXiv:1507.01577},
  year   = {2015}
}

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5 pages, 5 figures

Lattice QCD calculation of hadronic light-by-light scattering

Abstract

Keywords

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