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Greens function of a free massive scalar field on the lattice

B. Borasoy, H. Krebs

hep-latarXiv:hep-lat/0508005

Abstract

We propose a method to calculate the Greens function of a free massive scalar field on the lattice numerically to very high precision. For masses m < 2 (in lattice units) the massive Greens function can be expressed recursively in terms of the massless Greens function and just two additional mass-independent constants.

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