Composite operators from the operator product expansion: what can go wrong?

Details Composite operators from the operator product expansion: what can go wrong? Composite operators from the operator product expansion: what can go wrong?

1999-09-13

arxiv.org/abs/hep-lat/9909105v1

Nucl.Phys.Proc.Suppl. 83 (2000) 875-877

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 99 (Improvement and Renormalization), 3 pages, 3 eps figures

Scientific paper

The operator product expansion is used to compute the matrix elements of
composite renormalized operators on the lattice. We study the product of two
fundamental fields in the two-dimensional sigma-model and discuss the possible
sources of systematic errors. The key problem turns out to be the violation of
asymptotic scaling.

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