Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/18137
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Type: Journal article
Title: Convergence of chiral effective field theory
Author: Young, R.
Leinweber, D.
Thomas, A.
Citation: Progress in Particle and Nuclear Physics, 2003; 50(2):399-417
Publisher: Elsevier Science Bv
Issue Date: 2003
ISSN: 0146-6410
Editor: Faessler, A.
Statement of
Responsibility: 
R. D. Young, D. B. Leinweber and A. W. Thomas
Abstract: We formulate the expansion for the mass of the nucleon as a function of pion mass within chiral perturbation theory using a number of different ultra-violet regularisation schemes; including dimensional regularisation and various finite-ranged regulators. Leading and next-to-leading order non-analytic contributions are included through the standard one-loop Feynman graphs. In addition to the physical nucleon mass, the expansion is constrained by recent, extremely accurate, lattice QCD data obtained with two flavors of dynamical quarks. The extent to which different regulators can describe the chiral expansion is examined, while varying the range of quark mass over which the expansions are matched. Renormalised chiral expansion parameters are recovered from each regularisation prescription and compared. We find that the finite-range regulators produce consistent, model-independent results over a wide range of quark mass sufficient to solve the chiral extrapolation problem in lattice QCD.
Description: Copyright © 2003 Published by Elsevier Science B.V.
DOI: 10.1016/S0146-6410(03)00034-6
Description (link): http://www.elsevier.com/wps/find/journaldescription.cws_home/419/description#description
Published version: http://dx.doi.org/10.1016/s0146-6410(03)00034-6
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