Fitting a sum of exponentials to lattice correlation functions using a non-uniform prior

Details Fitting a sum of exponentials to lattice correlation functions using a non-uniform prior Fitting a sum of exponentials to lattice correlation functions using a non-uniform prior

2010-02-14

arxiv.org/abs/1002.2785v2

Eur.Phys.J.C70:233-241,2010

Physics

High Energy Physics

High Energy Physics - Lattice

12 pages, 8 figures, 8 tables, major revision, final version

Scientific paper

10.1140/epjc/s10052-010-1438-8

Excited states are extracted from lattice correlation functions using a non-uniform prior on the model parameters. Models for both a single exponential and a sum of exponentials are considered, as well as an alternate model for the orthogonalization of the correlation functions. Results from an analysis of torelon and glueball operators indicate the Bayesian methodology compares well with the usual interpretation of effective mass tables produced by a variational procedure. Applications of the methodology are discussed.

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