Time exponentiation of a Wilson loop for Yang-Mills theories in 2+εdimensions

Details Time exponentiation of a Wilson loop for Yang-Mills theories in 2+εdimensions Time exponentiation of a Wilson loop for Yang-Mills theories in 2+εdimensions

1998-06-23

arxiv.org/abs/hep-th/9806190v1

Nucl.Phys. B534 (1998) 491-512

Physics

High Energy Physics

High Energy Physics - Theory

RevTex, 28 pages, two figure files included

Scientific paper

10.1016/S0550-3213(98)00532-X

A rectangular Wilson loop centered at the origin, with sides parallel to space and time directions and length $2L$ and $2T$ respectively, is perturbatively evaluated ${\cal O}(g^4)$ in Feynman gauge for Yang--Mills theory in $1+(D-1)$ dimensions. When $D>2$, there is a dependence on the dimensionless ratio $L/T$, besides the area. In the limit $T \to \infty$, keeping $D>2$, the leading expression of the loop involves only the Casimir constant $C_F$ of the fundamental representation and is thereby in agreement with the expected Abelian-like time exponentiation (ALTE). At $D= 2$ the result depends also on $C_A$, the Casimir constant of the adjoint representation and a pure area law behavior is recovered, but no agreement with ALTE in the limit $T\to\infty$. Consequences of these results concerning two and higher-dimensional gauge theories are pointed out.

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