Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method

Details Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method

2002-04-04

arxiv.org/abs/hep-lat/0204004v2

Phys.Rev. D65 (2002) 094512

Physics

High Energy Physics

High Energy Physics - Lattice

11 pages, 30 figure files (eps), some references added and updated, requires REVTeX 4.0 and prerequisites (AMS-LaTeX 2.0, grap

Scientific paper

10.1103/PhysRevD.65.094512

We study various aspects of extracting spectral information from time correlation functions of lattice QCD by means of Bayesian inference with an entropic prior, the maximum entropy method (MEM). Correlator functions of a heavy-light meson-meson system serve as a repository for lattice data with diverse statistical quality. Attention is given to spectral mass density functions, inferred from the data, and their dependence on the parameters of the MEM. We propose to employ simulated annealing, or cooling, to solve the Bayesian inference problem, and discuss practical issues of the approach.

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