2001/12/17 by P. O. Bowman, Patrick O Bowman, U. M. Heller +3 · 7 citations
Physics and Astronomy · #Action (physics) #Ansatz #Gauge (firearms) #Laplace operator #Lattice (music) #Particle physics theoretical and experimental studies #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Quark #hep-lat
paper · pdf · doi:10.1016/s0920-5632(02)01409-3
published in Nuclear Physics B - Proceedings Supplements 109(1), 163-167 (Elsevier BV) · 5 pages, 8 figs., Talk given at LHP workshop, Cairns
arxiv created 2001/12/17 · openalex publication_date 2002/05/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Studies of gauge dependent quantities are afflicted with Gribov copies, but Laplacian gauge fixing provides one possible solution to this problem. We present results for the lattice quark propagator in both Landau and Laplacian gauges using standard and improved staggered quark actions. The standard Kogut-Susskind action has errors of \oa2 while the improved ``Asqtad'' action has \oa4, \oag22 errors and this improvement is seen in the quark propagator. We demonstrate the application of tree-level corrections to these actions and see that Landau and Laplacian gauges produce very similar results. In addition, we test an ansatz for the quark mass function, with promising results. In the chiral limit, the infrared quark mass, M(q2 = 0) is found to be 260± 20 MeV.