A Solution to Coupled Dyson-Schwinger Equations for Gluons and Ghosts in Landau Gauge

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dc.creatorHauck, Andreas
dc.creatorAlkofer, Reinhard
dc.creatorvon Smekal, Lorenz
dc.date1998-04-24
dc.date.accessioned2026-07-07T04:03:44Z
dc.date.available2026-07-07T04:03:44Z
dc.descriptionA truncation scheme for the Dyson-Schwinger equations of QCD in Landau gauge is presented which implements the Slavnov-Taylor identities for the 3-point vertex functions. Neglecting contributions from 4-point correlations such as the 4-gluon vertex function and irreducible scattering kernels, a closed system of equations for the propagators is obtained. For the pure gauge theory without quarks this system of equations for the propagators of gluons and ghosts is solved in an approximation which allows for an analytic discussion of its solutions in the infrared: The gluon propagator is shown to vanish for small spacelike momenta whereas the ghost propagator is found to be infrared enhanced. The running coupling of the non-perturbative subtraction scheme approaches an infrared stable fixed point at a critical value of the coupling, alpha_c approximately 9.5. The results for the propagators obtained here compare favorably with recent lattice calculations.
dc.description9 pages, 3 figures. Talk presented at the Workshop on Nonperturbative Methods in Quantum Field Theory, Adelaide, Australia, February 1998
dc.identifierhttps://arxiv.org/abs/hep-ph/9804387
dc.identifierhttp://arxiv.org/abs/hep-ph/9804387
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/47790
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Solution to Coupled Dyson-Schwinger Equations for Gluons and Ghosts in Landau Gauge
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