The Infrared behavior of gluon and ghost propagators in Landau gauge QCD
May, 19974 pages
Published in:
- Phys.Rev.Lett. 79 (1997) 3591-3594
e-Print:
- hep-ph/9705242 [hep-ph]
Report number:
- ANL-PHY-8683-TH-97,
- UNITU-THEP-7-1997,
- TU-GK-97-002
Citations per year
Abstract:
A solvable systematic truncation scheme for the Dyson-Schwinger equations of Euclidean QCD in Landau gauge is presented. It implements the Slavnov-Taylor identities for the three-gluon and ghost-gluon vertices, whereas irreducible four-gluon couplings as well as the gluon-ghost and ghost-ghost scattering kernels are neglected. The infrared behavior of gluon and ghost propagators is obtained analytically: The gluon propagator vanishes for small spacelike momenta whereas the ghost propagator diverges stronger than a massless particle pole. The numerical solutions are compared with recent lattice data for these propagators. The running coupling of the renormalization scheme approaches a fixed point, , in the infrared.- quantum chromodynamics: Euclidean
- Landau gauge
- Dyson-Schwinger equation
- Slavnov identity
- gluon: propagator
- ghost: propagator
- infrared problem
- numerical calculations
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