Gluon Propagator in the Landau Gauge fixed Lattice QCD Simulation
Abstract
We measured the gluon propagator in the Landau gauge fixed QCD Langevin simulation and studied the infrared behaviour of the gluon propagator. The 4^3 x 8 lattice simulation was done for quenched $\beta=3,4,5$ and unquenched $\beta=4, \kappa=0.1,0.15,0.2$ using each 100 independent samples. The Landau gauge fixing was done by an extension of the Fourier acceleration method with the condition Maxdiv A<10^{4}, and the field A is related to the link variable by U=exp A instead of the usual Ulinear definition. We confirmed gauge fixing with smearing preconditioning works perfectly for the purpose of finding the global minimum of the squared norm of the gauge field when $\beta$ is large(e.g. $\beta=5$). Our simulation results suggests the possibility of a realization of the infrared behaviour of the GribovZwanziger theory.
 Publication:

arXiv eprints
 Pub Date:
 September 1998
 DOI:
 10.48550/arXiv.heplat/9809078
 arXiv:
 arXiv:heplat/9809078
 Bibcode:
 1998hep.lat...9078N
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 4 pages, 2 eps figures, use worldsci.sty proceedings of the Confinement III, June 1998, NewPort