The Infrared Landau Gauge Gluon Propagator from Lattice QCD

TL;DR

This study uses large asymmetric lattice QCD simulations to analyze the infrared behavior of the Landau gauge gluon propagator, providing insights into low-energy parameters and testing Dyson-Schwinger equation solutions.

Contribution

It presents the first lattice QCD investigation of the IR gluon propagator at momenta as low as 100 MeV, measuring key parameters and comparing with Dyson-Schwinger predictions.

Findings

Measured low energy parameters $or gluon propagator

Accessed momenta down to 100 MeV

Compared lattice results with Dyson-Schwinger solutions

Abstract

The quenched Landau gauge gluon propagator is investigated in lattice QCD with large assimetric lattices, accessing momenta as low as $q \sim 100$ MeV or smaller. Our investigation focus on the IR limit of the gluon dressing function, testing the compatibility with recent solutions of the Dyson-Schwinger equations. In particular, the low energy parameters $\kappa$ and $\alpha (0)$ are measured.