Lattice QCD calculation of hadronic light-by-light scattering

6533b870fe1ef96bd12cfaec

RESEARCH PRODUCT

Lattice QCD calculation of hadronic light-by-light scattering

Oleksii Gryniuk Vladimir Pascalutsa Harvey B. Meyer Jeremy Green Georg M. Von Hippel

subject

Physics Quantum chromodynamics Particle physics Anomalous magnetic dipole moment Scattering High Energy Physics::Lattice Lattice field theory Nuclear Theory High Energy Physics::Phenomenology High Energy Physics - Lattice (hep-lat)General Physics and Astronomy FOS: Physical sciences Lattice QCD Light scattering Scattering amplitude High Energy Physics - Phenomenology High Energy Physics - Lattice Pion High Energy Physics - Phenomenology (hep-ph)High Energy Physics::Experiment Nuclear Experiment

description

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.

year	journal	country	edition	language
2015-07-06

https://dx.doi.org/10.48550/arxiv.1507.01577

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