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

摘要

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