Lattice Quark Propagator in Landau and Laplacian Gauges
نویسندگان
چکیده
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 O(a) while the improved “Asqtad” action has O(a), O(ag) errors. 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.
منابع مشابه
Lattice quark propagator with staggered quarks in Landau and Laplacian gauges
We report on the lattice quark propagator using standard and improved Staggered quark actions, with the standard, Wilson gauge action. The standard Kogut-Susskind action has errors of O(a) while the “Asqtad” action has O(a), O(ag) errors. The quark propagator is interesting for studying the phenomenon of dynamical chiral symmetry breaking and as a test-bed for improvement. Gauge dependent quant...
متن کاملQuark propagator from an improved staggered action in Laplacian and Landau gauges
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 O(a) while the improved “Asqtad” action has O(a), O(ag) erro...
متن کاملGluons, Quarks, and the Transition from Nonperturbative to Perturbative Qcd
Lattice-based investigations of two fundamental QCD quantities are described, namely the gluon and quark propagators in Landau gauge. We have studied the Landau gauge gluon propagator using a variety of lattices with spacings from a = 0.17 to 0.41 fm to explore finite volume and discretization effects. We also introduce the general method of “tree-level correction” to minimize the effect of lat...
متن کاملCoupling Constant and Confinement in Minimal Coulomb and Landau Gauges
We present a numerical study of the space-space and time-time components of the gluon propagator at equal time in the minimal Coulomb gauge, and of the gluon and ghost propagators in the minimal Landau gauge. This work allows a non-perturbative evaluation of the running coupling constant and a numerical check of Gribov’s confinement scenarios for these two gauges. Our simulations are done in pu...
متن کاملLaplacian gauge gluon propagator in SU „
Lattice QCD provides a well suited theoretical framework for the study of nonperturbative quantities as a function of the number of colors. Although experimentally inaccessible, QCD for Nc52 and Nc54 is interesting from the theoretical point of view. Recently SU(Nc) Yang-Mills theories were investigated for various Nc by two groups @1,2# with emphasis on the evaluation of string tensions and gl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001