The IR gluon propagator from lattice QCD
P. J. Silva, O. Oliveira
TL;DR
This study computes the gluon propagator using lattice QCD at very low momenta to test Dyson-Schwinger equation solutions, finding results that support a vanishing gluon propagator at zero momentum.
Contribution
It provides lattice QCD data at low momenta to validate Dyson-Schwinger solutions and measures the infrared exponent κ.
Findings
Supports a vanishing zero-momentum gluon propagator
Finds compatibility of Dyson-Schwinger solutions with lattice data
Assesses functional forms for fitting the gluon propagator
Abstract
The gluon propagator is computed in large asymmetric lattices, accessing momenta around 100 MeV and smaller. Our study tries to check the compatibility of the recent solutions of the gluon-ghost Dyson-Schwinger equations with lattice results. In particular the exponent , which characterizes the solutions for the infrared, is measured. Results favours a vanishing zero momentum gluon propagator. We also report on the compatibility of various functional forms used to fit the Dyson-Schwinger solution for the full range of momenta and the lattice gluon propagator.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research