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    Quark propagator in the Landau gauge


    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:

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