Fitting a sum of exponentials to lattice correlation functions using a non-uniform prior
Alphawave Research, Atlanta, GA, 30238, USA
Revised: 16 August 2010
Published online: 30 September 2010
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.
© Springer-Verlag / Società Italiana di Fisica, 2010