%0 Journal Article
%T Excited-State Effective Masses in Lattice QCD
%A George T. Fleming
%A Saul D. Cohen
%A Huey-Wen Lin
%A Victor Pereyra
%J Mathematics
%D 2009
%I arXiv
%R 10.1103/PhysRevD.80.074506
%X We apply black-box methods, i.e. where the performance of the method does not depend upon initial guesses, to extract excited-state energies from Euclidean-time hadron correlation functions. In particular, we extend the widely used effective-mass method to incorporate multiple correlation functions and produce effective mass estimates for multiple excited states. In general, these excited-state effective masses will be determined by finding the roots of some polynomial. We demonstrate the method using sample lattice data to determine excited-state energies of the nucleon and compare the results to other energy-level finding techniques.
%U http://arxiv.org/abs/0903.2314v1