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Towards the application of the Maximum Entropy Method to finite temperature Upsilon Spectroscopy

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arxiv hep-lat/0009031 v1 pith:4ZUP2HFY submitted 2000-09-22 hep-lat

classification hep-lat
keywords temperaturefinitemethodcorrelationentropyfunctionfunctionsmaximum
verification ladder T0 review T1 audit T2 compute T3 formal
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According to the Narnhofer Thirring Theorem interacting systems at finite temperature cannot be described by particles with a sharp dispersion law. It is therefore mandatory to develop new methods to extract particle masses at finite temperature. The Maximum Entropy method offers a path to obtain the spectral function of a particle correlation function directly. We have implemented the method and tested it with zero temperature Upsilon correlation functions obtained from an NRQCD simulation. Results for different smearing functions are discussed.

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