Talk presented by Antony G. Williams

Parallel Session: Improvement and Renormalization III

Friday July 2nd, 15.30 - 15.50, Room B

Improved Landau gauge fixing and discretization errors

Abstract: Lattice discretisation errors in the Landau gauge condition are examined. An improved gauge fixing algorithm in which O(a^2) errors are removed is presented. It is shown that O(a^2) errors dominate standard gauge fixing procedures and an absolute estimate of the deviation from continuum Landau gauge is given. These results indicate the importance of implementing an improved gauge gauge fixing condition, in particular when using an improved gluon action.

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