Feynman gauge on the lattice: new results and perspectives

Details Feynman gauge on the lattice: new results and perspectives Feynman gauge on the lattice: new results and perspectives

2011-01-26

arxiv.org/abs/1101.5080v1

Physics

High Energy Physics

High Energy Physics - Lattice

6 pages; talk presented at the Workshop "T(R)OPICAL QCD II", Cairns (Australia)

Scientific paper

We have recently introduced a new implementation of the Feynman gauge on the lattice, based on a minimizing functional that extends in a natural way the Landau-gauge case, while preserving all the properties of the continuum formulation. The only remaining difficulty with our approach is that, using the standard (compact) discretization, the gluon field is bounded, while its four-divergence 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. Here we discuss these two possible solutions.

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