Skullerud, Jon Ivar and Williams, Anthony G. (2001) Quark propagator in the Landau gauge. Physical Review D, 63 (054508). pp. 1-13. ISSN 0556-2821

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Abstract

The Landau gauge quark propagator in momentum space is investigated using the O(a)-improved Sheikholeslami-Wohlert quark action with a tree-level mean-field improved coefficient csw . We study the unimproved definition of the quark propagator, as well as two different tree-level O(a)-improved propagators. The ultraviolet behavior of the free lattice propagator is studied for each of these in order to establish which of them provides the most reliable description of the quark propagator up to the medium momentum regime. A general method of tree-level correction is introduced. This exploits asymptotic freedom and removes much of the trivial lattice artifacts at medium to high momenta. We obtain results for the quark propagator which are qualitatively similar to those typically used in quark models. A simple extrapolation of the infrared quark mass M(p250) to the chiral limit gives 29868630 MeV, which is consistent with phenomenological expectations.

Item Type:	Article
Keywords:	quark; propagator; landau gauge;
Academic Unit:	Faculty of Science and Engineering > Research Institutes > Hamilton Institute Faculty of Science and Engineering > Theoretical Physics
Item ID:	15693
Identification Number:	https://doi.org/10.1103/PhysRevD.63.054508
Depositing User:	Dr. Jonivar Skullerud
Date Deposited:	21 Mar 2022 13:16
Journal or Publication Title:	Physical Review D
Publisher:	The American Physical Society
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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