Casimir energy in the Gribov-Zwanziger approach to QCD

TL;DR

This paper investigates the Casimir energy in Quantum Chromodynamics using the Gribov-Zwanziger framework, accounting for non-perturbative gauge effects, and provides estimates for the bag radius consistent with physical expectations.

Contribution

It introduces a novel calculation of Casimir energy in QCD within the Gribov-Zwanziger approach, incorporating non-perturbative effects and estimating the bag radius.

Findings

Correct sign of Casimir energy obtained

Estimated the radius of the MIT bag model

Demonstrated the importance of non-perturbative effects

Abstract

In this paper we study the Casimir energy of QCD within the Gribov-Zwanziger approach. In this model non-perturbative effects of gauge copies are properly taken into account. We show that the computation of the Casimir energy for the MIT bag model within the (refined) Gribov-Zwanziger approach not only gives the correct sign but it also gives an estimate for the radius of the bag.