Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1841215 | Nuclear Physics B | 2011 | 20 Pages |
Abstract
In this paper we propose a model-independent method to extract the resonance parameters on the lattice directly from the Euclidean 2-point correlation functions of the field operators at finite times. The method is tested in case of the two-point function of the Δ-resonance, calculated at one loop in Small Scale Expansion. Further, the method is applied to a 1+11+1-dimensional model with two coupled Ising spins and the results are compared with earlier ones obtained by using Lüscher's approach.
Keywords
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Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Ulf-G. Meißner, Kathryn Polejaeva, Akaki Rusetsky,