paper

Scaling properties of the perturbative Wilson loop in two-dimensional non-commutative Yang-Mills theory

arXiv:hep-th/0205210 · doi:10.1103/PhysRevD.66.085012

Abstract

Commutative Yang-Mills theories in 1+1 dimensions exhibit an interesting interplay between geometrical properties and U(N) gauge structures: in the exact expression of a Wilson loop with windings a non trivial scaling intertwines and . In the non-commutative case the interplay becomes tighter owing to the merging of space-time and ``internal'' symmetries in a larger gauge group . We perform an explicit perturbative calculation of such a loop up to ; rather surprisingly, we find that in the contribution from the crossed graphs (the genuine non-commutative terms) the scaling we mentioned occurs for large and in the limit of maximal non-commutativity . We present arguments in favour of the persistence of such a scaling at any perturbative order and succeed in summing the related perturbative series.

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