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The Variational Problem and Background Field in the Renormalization Group Method for Non-Linear Sigma Models

Published 18 Apr 2022 in hep-th, hep-lat, math-ph, and math.MP | (2204.08252v3)

Abstract: We study the variational problem as described by Balaban in his renormalization group method for Yang-Mills theories in $d= 3, 4$ and adapt it to a class of Non-Linear Sigma Models in $d=2$. The result of the variational problem is a minimal configuration which can serve as a classical background field in the renormalization group analysis.

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