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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Oliveira, Orlando [1, 2] ; Silva, Paulo J. [2] ; Skullerud, Jon-Ivar [3, 4] ; Sternbeck, Andre [5]
Total Authors: 4
Affiliation:
[1] Ctr Tecn Aeroesp, Inst Tecnol Aeronaut, Dept Fis, BR-12228900 Sao Paulo - Brazil
[2] Univ Coimbra, Dept Fis, CFisUC, P-3004516 Coimbra - Portugal
[3] Trinity Coll Dublin, Sch Math, Dublin 2 - Ireland
[4] Natl Univ Ireland Maynooth, Dept Theoret Phys, Maynooth, Kildare - Ireland
[5] Friedrich Schiller Univ Jena, Theoret Phys Inst, D-07743 Jena - Germany
Total Affiliations: 5
Document type: Journal article
Source: Physical Review D; v. 99, n. 9 MAY 30 2019.
Web of Science Citations: 0
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 m(pi) approximate to 420, 290 and 150 McV, 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(p(2)) 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. (AU)

FAPESP's process: 17/01142-4 - From the description of the non-perturbative regime of QCD to the application of quantum field theory to condensed matter physics
Grantee:Tobias Frederico
Support type: Research Grants - Visiting Researcher Grant - International