High Precision Statistical Landau Gauge Lattice Gluon Propagator Computation vs. the Gribov-Zwanziger approach

TL;DR

This paper compares lattice simulation results of the Landau gauge gluon propagator with the Gribov-Zwanziger theoretical predictions, showing good agreement at low momenta and favoring the Refined Gribov-Zwanziger scenario.

Contribution

It provides a detailed comparison between large-scale lattice data and the Gribov-Zwanziger approach, highlighting the scenario's validity and offering a global fit bridging low and high momenta.

Findings

Data agrees with Gribov-Zwanziger predictions up to 1 GeV

Supports the Refined Gribov-Zwanziger scenario

Provides a global fit interpolating between scenarios

Abstract

The compatibility of the results from the Gribov-Zwanziger tree level prediction and lattice simulations, using large statistical ensembles, for the Landau gauge gluon propagator are investigated, thereby complementing earlier work using small-scale statistics. Our results show that the data is well described by the tree level estimate only up to momenta $p \lesssim 1$ GeV while clearly favoring the so-called Refined Gribov-Zwanziger scenario, implying particular relations between certain possible $d=2$ condensates. We also provide a global fit of the lattice data which interpolates between the above scenario at low momenta and the usual continuum one-loop renormalization improved perturbation theory after introducing an infrared log-regularizing term.