6533b873fe1ef96bd12d4d80
RESEARCH PRODUCT
Non-perturbative momentum dependence of the coupling constant and hadronic models
Aurore CourtoyVicente VentoSergio Scopettasubject
Quantum chromodynamicsPhysicsCoupling constantNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsHadronNuclear TheoryHigh Energy Physics::PhenomenologyFOS: Physical sciencesFísicaObservable01 natural sciencesEffective nuclear chargeGluonMomentumHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesHigh Energy Physics::ExperimentNon-perturbative010306 general physicsNuclear Experimentdescription
Models of hadron structure are associated with a hadronic scale which allows by perturbative evolution to calculate observables in the deep inelastic region. The resolution of Dyson-Schwinger equations leads to the freezing of the QCD running coupling (effective charge) in the infrared, which is best understood as a dynamical generation of a gluon mass function, giving rise to a momentum dependence which is free from infrared divergences. We use this new development to understand why perturbative treatments are working reasonably well despite the smallness of the hadronic scale.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-02-08 |