Gluon Propagators in Linear Covariant Gauge

Details Gluon Propagators in Linear Covariant Gauge Gluon Propagators in Linear Covariant Gauge

2011-02-25

arxiv.org/abs/1102.5233v1

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, 4 figures; talk presented at the workshop "The Many Faces of QCD", Ghent (Belgium)

Scientific paper

The implementation of the linear covariant gauge on the lattice faces a conceptual problem: using the standard compact discretization, the gluon field is bounded, while the four-divergence of the gluon field satisfies a Gaussian distribution, i.e. it is unbounded. This can give rise to convergence problems when a numerical implementation is attempted. In order to overcome this problem, one can use different discretizations for the gluon field or consider an SU(N_c) group with sufficiently large N_c. One can also consider small values of the gauge parameter xi and study numerically the limiting case of xi \to 0, i.e. the Landau gauge. These different approaches will be discussed here.

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