We explore a method to extract energy eigenstates, called Athens Model Independent Analysis Scheme (AMIAS),
which is an alternative to solving standard Generalized Eigenvalue Problems (GEVP). The method is based on statistically
sampling the space of fit parameters according to the $\chi^2$ value of the fit function. The method is particularly
suited for correlators or correlation matrices with strong contributions from several energy eigenstates and for rather
noisy data, e.g. for correlators with disconnected or partly disconnected diagrams. We apply the method to the analysis
of the $J^P = 0^+$ channel in the context of our investigation of the $a_0(980)$ meson and point out advantages compared to the GEVP.
Volume 256 -
34th annual International Symposium on Lattice Field Theory (LATTICE2016) -
Hadron Spectroscopy and Interactions
Using a new analysis method to extract excited states in the scalar meson sector
Full text:
pdf
Pre-published on:
January 23, 2017
Published on:
March 24, 2017
Abstract
DOI: https://doi.org/10.22323/1.256.0129
How to cite
Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.
Open Access
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.