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    Quark propagator with two flavors of O(a)-improved Wilson fermions


    Oliveira, Orlando and Silva, Paulo J. and Skullerud, Jon-Ivar and Sternbeck, André (2019) Quark propagator with two flavors of O(a)-improved Wilson fermions. Physical Review D, 99 (094506). ISSN 2470-0029

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    Abstract

    We compute the Landau gauge quark propagator from lattice QCD with two flavors of dynamical O(a)-improved Wilson fermions. The calculation is carried out with lattice spacings ranging from 0.06 fm to 0.08 fm, with quark masses corresponding to pion masses mπ≈420, 290 and 150 MeV, and for volumes of up to (4.5  fm)4. Our ensembles allow us to evaluate lattice spacing, volume and quark mass effects. We find that the quark wave function which is suppressed in the infrared, is further suppressed as the quark mass is reduced, but the suppression is weakened as the volume is increased. The quark mass function M(p2) shows only a weak volume dependence. Hypercubic artefacts beyond O(a) are reduced by applying both cylinder cuts and H4 extrapolations. The H4 extrapolation shifts the quark wave function systematically upwards but does not perform well for the mass function.

    Item Type: Article
    Additional Information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Cite as: Quark propagator with two flavors of O(a)-improved Wilson fermions Orlando Oliveira, Paulo J. Silva, Jon-Ivar Skullerud, and André Sternbeck Phys. Rev. D 99, 094506 (2019) DOI:https://doi-org.jproxy.nuim.ie/10.1103/PhysRevD.99.094506
    Keywords: Lattice field theory; Quantum chromodynamics; Quantum field theory;
    Academic Unit: Faculty of Science and Engineering > Research Institutes > Hamilton Institute
    Faculty of Science and Engineering > Theoretical Physics
    Item ID: 14849
    Identification Number: https://doi.org/10.1103/PhysRevD.99.094506
    Depositing User: Dr. Jonivar Skullerud
    Date Deposited: 22 Sep 2021 15:59
    Journal or Publication Title: Physical Review D
    Publisher: American Physical Society
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI)
    URI:

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