Excited-State Effective Masses in Lattice QCD

Autor:	Fleming, George T., Cohen, Saul D., Lin, Huey-Wen, Pereyra, Victor
Rok vydání:	2009
Předmět:	High Energy Physics - Lattice Mathematics - Numerical Analysis
Zdroj:	Phys.Rev.D80:074506,2009
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.80.074506
Popis:	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. Comment: 18 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0903.2314 Zobrazit plný text záznamu View this record from Arxiv