6533b839fe1ef96bd12a5a3d
RESEARCH PRODUCT
On the precision of a data-driven estimate of the pseudoscalar-pole contribution to hadronic light-by-light scattering in the muon g-2
Andreas Nyffelersubject
PhysicsParticle physicsMuonPhoton010308 nuclear & particles physicsScatteringPhysicsQC1-999HadronHigh Energy Physics::PhenomenologyNuclear TheoryForm factor (quantum field theory)FOS: Physical sciences01 natural sciencesLight scatteringPrime (order theory)PseudoscalarHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesHigh Energy Physics::Experiment010306 general physicsNuclear Experimentdescription
The evaluation of the numerically dominant pseudoscalar-pole contribution to hadronic light-by-light scattering in the muon g-2 involves the pseudoscalar-photon transition form factor F_{P gamma^* gamma^*}(-Q_1^2, -Q_2^2) with P = pi^0, eta, eta^\prime and, in general, two off-shell photons with spacelike momenta Q_{1,2}^2. We determine which regions of photon momenta give the main contribution for hadronic light-by-light scattering. Furthermore, we analyze how the precision of future measurements of the single- and double-virtual form factor impacts the precision of a data-driven estimate of this contribution to hadronic light-by-light scattering.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-02-11 |