6533b85bfe1ef96bd12ba28d
RESEARCH PRODUCT
Direct calculation of hadronic light-by-light scattering
Oleksii GryniukJeremy GreenAndreas NyffelerGeorg M. Von HippelVladimir PascalutsaHarvey B. MeyerNils Asmussensubject
PhysicsQuantum chromodynamicsParticle physicsMuonAnomalous magnetic dipole momentNuclear TheoryLattice field theoryHigh Energy Physics - Lattice (hep-lat)High Energy Physics::PhenomenologyFOS: Physical sciencesLattice QCDLight scatteringScattering amplitudeNuclear Theory (nucl-th)High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics - LatticeHigh Energy Physics::ExperimentPhenomenology (particle physics)description
We report calculations of hadronic light-by-light scattering amplitudes via lattice QCD evaluation of Euclidean four-point functions of vector currents. These initial results include only the fully quark-connected contribution. Particular attention is given to the case of forward scattering, which can be related via dispersion relations to the $\gamma^* \gamma^* \to$ hadrons cross section, and thus allows lattice data to be compared with phenomenology. We also present a strategy for computing the hadronic light-by-light contribution to the muon anomalous magnetic moment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-10-28 |