The O(N) sigma-model Laplacian

Details The O(N) sigma-model Laplacian The O(N) sigma-model Laplacian

1995-11-06

arxiv.org/abs/hep-th/9511041v1

Phys.Lett. B365 (1996) 169-174

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, latex

Scientific paper

10.1016/0370-2693(95)01333-4

For fields that vary slowly on the scale of the lightest mass the logarithm of the vacuum functional of a massive quantum field theory can be expanded in terms of local functionals satisfying a form of the Schr\"odinger equation, the principal ingredient of which is a regulated functional Laplacian. We construct to leading order a Laplacian for the O(N) sigma-model that acts on such local functionals. It is determined by imposing rotational invariance in the internal space together with closure of the Poincar\'e algebra.

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