Topological contributions in two-dimensional Yang-Mills theory: from group averages to integration over algebras

Details Topological contributions in two-dimensional Yang-Mills theory: from group averages to integration over algebras Topological contributions in two-dimensional Yang-Mills theory: from group averages to integration over algebras

2001-01-09

arxiv.org/abs/hep-th/0101052v1

Lett.Math.Phys. 57 (2001) 97-106

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, revtex

Scientific paper

We show that keeping only the topologically trivial contribution to the
average of a class function on U(N) amounts to integrating over its algebra.
The goal is reached first by decompactifying an expansion over the instanton
basis and then directly, by means of a geometrical procedure.

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