Infrared exponents of gluon and ghost propagators from Lattice QCD
O. Oliveira, P. J. Silva
TL;DR
This paper compares lattice QCD data with Dyson-Schwinger equation predictions for gluon and ghost propagators in Landau gauge, finding partial agreement for gluons but discrepancies for ghosts in the infrared regime.
Contribution
It provides a detailed analysis of the infrared exponents of gluon and ghost propagators from lattice QCD and assesses their compatibility with DSE solutions, highlighting differences for ghost propagators.
Findings
Gluon propagator data aligns with DSE infrared solution with exponent ~0.53
Lattice ghost propagator data does not follow the DSE power law in the infrared
Finite volume effects are modeled to improve the comparison
Abstract
The compatibility of the pure power law infrared solution of QCD Dyson-Schwinger equations (DSE) and lattice data for the gluon and ghost propagators in Landau gauge is discussed. For the gluon propagator, the lattice data is compatible with the DSE infrared solution with an exponent , measured using a technique that suppresses finite volume effects and allows to model these corrections to the lattice data. For the ghost propagator, the lattice data does not seem to follow the infrared DSE power law solution.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research · Particle physics theoretical and experimental studies