Fitting a sum of exponentials to lattice correlation functions using a non-uniform prior
arXiv:1002.2785 · doi:10.1140/epjc/s10052-010-1438-8
Abstract
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.
12 pages, 8 figures, 8 tables, major revision, final version
References in corpus (7)
- Maximum Entropy Analysis of the Spectral Functions in Lattice QCD
- SU(N) gauge theories in 2+1 dimensions
- Gluon propagators and quark confinement
- Bayesian curve fitting for lattice gauge theorists
- Spectral density analysis of time correlation functions in lattice QCD using the maximum entropy method
- Recent lattice results relevant for heavy ion collisions
- Improved Superlinks for Higher Spin Operators