6533b821fe1ef96bd127b012
RESEARCH PRODUCT
Gluon mass and freezing of the QCD coupling
Joannis PapavassiliouArlene Cristina Aguilarsubject
Quantum chromodynamicsPhysicsHistoryParticle physicsBackground field methodInfrared fixed pointHigh Energy Physics::LatticeMomentum transferHigh Energy Physics::PhenomenologyFísicaPropagatorFOS: Physical sciencesComputer Science ApplicationsEducationGluonsymbols.namesakeHigh Energy Physics - PhenomenologyEffective mass (solid-state physics)High Energy Physics - Phenomenology (hep-ph)Quantum electrodynamicssymbolsFeynman diagramdescription
Infrared finite solutions for the gluon propagator of pure QCD are obtained from the gauge-invariant non-linear Schwinger-Dyson equation formulated in the Feynman gauge of the background field method. These solutions may be fitted using a massive propagator, with the special characteristic that the effective mass employed drops asymptotically as the inverse square of the momentum transfer, in agreement with general operator-product expansion arguments. Due to the presence of the dynamical gluon mass the strong effective charge extracted from these solutions freezes at a finite value, giving rise to an infrared fixed point for QCD.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-11-06 |