Spectral Functions, Maximum Entropy Method and Unconventional Methods in Lattice Field Theory

Abstract

We present two unconventional methods of extracting information from hadronic 2-point functions produced by Monte Carlo simulations. The first is an extension of earlier work by Leinweber which combines a QCD Sum Rule approach with lattice data. The second uses the Maximum Entropy Method to invert the 2-point data to obtain estimates of the spectral function. The first approach is applied to QCD data, and the second method is applied to the Nambu--Jona-Lasinio model in (2+1)D. Both methods promise to augment the current approach where physical quantities are extracted by fitting to pure exponentials.

Paper presented at the Workshop on Lattice Hadron Physics, July 2001, Cairns, Australia. 5 pages. Minor spelling error corrected

Cited by in corpus (2)

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• Calculation of the Pseudoscalar-Isoscalar Hadronic Current Correlation Functions of the Quark-Gluon Plasma