The adjoint potential in the pseudoparticle approach: string breaking and Casimir scaling

TL;DR

This paper investigates the adjoint static potential in SU(2) Yang-Mills theory using the pseudoparticle approach, confirming Casimir scaling, observing string breaking, and aligning qualitatively with lattice results.

Contribution

It provides the first detailed analysis of the adjoint potential within the pseudoparticle model, demonstrating string breaking and Casimir scaling.

Findings

Agreement with Casimir scaling hypothesis

Evidence for string breaking in the adjoint potential

Fundamental potential remains linear at large distances

Abstract

We perform a detailed study of the adjoint static potential in the pseudoparticle approach, which is a model for SU(2) Yang-Mills theory. We find agreement with the Casimir scaling hypothesis and there is clear evidence for string breaking. At the same time the potential in the fundamental representation is linear for large separations. Our results are in qualitative agreement with results from lattice computations.