The string tension in massive $QCD_2$

TL;DR

This paper calculates the string tension in massive QCD2, showing it vanishes for massless quarks and deriving its dependence on representations when a small mass is introduced.

Contribution

It provides a detailed calculation of string tension in massive QCD2, revealing its dependence on quark mass and representations, which was not previously established.

Findings

String tension vanishes for zero quark mass.

A non-zero tension appears with small quark mass.

Tension depends on the representations of charges.

Abstract

We compute the string tension in massive $QCD_2$. It is shown that the string tension vanishes when the mass of the dynamical quark is zero, with no dependence on the representations of the dynamical or of the external charges. When a small mass ($m\ll e$) is added, a tension appears and we calculate its value as a function of the representations.