Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2000-07-20
Phys.Rev.D63:054508,2001
Physics
High Energy Physics
High Energy Physics - Lattice
18 pages, 17 figures, uses RevTeX4. Some changes to figures, added further discussion of systematic uncertainties. Version acc
Scientific paper
10.1103/PhysRevD.63.054508
The Landau gauge quark propagator in momentum space is investigated using the O(a)-improved Sheikholeslami--Wohlert (SW) quark action with a tree-level mean-field improved coefficient c_sw. We have studied 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(p^2=0) to the chiral limit gives (298+/-8+/-30) MeV, which is consistent with phenomenological expectations.
Skullerud Jonivar
Williams Anthony G.
No associations
LandOfFree
Quark propagator in the Landau gauge does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quark propagator in the Landau gauge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quark propagator in the Landau gauge will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-545821