Running mass of the gluon propagator in the Landau gauge

TL;DR

This paper demonstrates that various models of the gluon propagator's infrared behavior in Landau gauge are equivalent, emphasizing the importance of a unified interpretation of the gluon's effective mass in quantum chromodynamics.

Contribution

It shows the equivalence of different proposals for the gluon propagator's infrared form, unifying diverse approaches into a single physical picture.

Findings

All models describe the same physics in the infrared limit.

The gluon propagator can be represented with a universal running mass.

Highlights the need for consensus on interpreting these results.

Abstract

Gluon propagator in the infrared limit, computed in the Landau gauge, can be cast into an universal form with a running mass for the gluon. In this way we are able to show that all the proposals appeared so far in literature are equivalent and describe the same physics. In this way, it appears essential to reach a general agreement about the interpretation of such results. We discuss the points that make difficult to agree on a similar view about this.