A pole expansion in the uniformization variable expresses two-hadron imaginary-time correlation functions in terms of resonance pole positions and residues, offering a direct lattice QCD analysis method.
In terms of the uniformization variable, u, Dij(u) can be expressed as a sum of the pole terms, the Mittag-Leffler expansion [27, 28], as Dij(u) = X n rij n u−un − rji∗ n u +u∗ n
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Pole-Expansion of Two-Hadron Imaginary-Time Correlation Function -a new method of analysis for unstable states in lattice QCD-
A pole expansion in the uniformization variable expresses two-hadron imaginary-time correlation functions in terms of resonance pole positions and residues, offering a direct lattice QCD analysis method.