Phys. Rev. Lett. 72, 3141–3144 (1994)Lightlike Wilson loops and gauge invariance of Yang-Mills theory in 1+1 dimensionsReceived 31 January 1994; published in the issue dated 16 May 1994 A lightlike Wilson loop is computed in perturbation theory up to O(g4) for pure Yang-Mills theory in 1+1 dimensions, using Feynman and light-cone gauges to check its gauge invariance. After dimensional regularization in intermediate steps, a finite gauge invariant result is obtained, which, however, does not exhibit Abelian exponentiation. Our result is at variance with the common belief that pure Yang-Mills theory is free in 1+1 dimensions, apart perhaps from topological effects. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.72.3141
DOI:
10.1103/PhysRevLett.72.3141
PACS:
11.10.Kk, 11.15.Bt
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