Improved non-perturbative renormalization without $c_{NGI}$

Details Improved non-perturbative renormalization without $c_{NGI}$ Improved non-perturbative renormalization without $c_{NGI}$

2001-10-08

arxiv.org/abs/hep-lat/0110021v1

Nucl.Phys.Proc.Suppl. 106 (2002) 817-819

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages. Lattice2001(improvement)

Scientific paper

10.1016/S0920-5632(01)01853-9

Recently, a method for O(a) improvement of composite operators has been proposed which uses the large momentum behavior of fixed gauge quark and gluon correlation functions (G. Martinelli et al., hep-lat/0106003). A practical problem with this method is that a particular improvement coefficient, $c_{NGI}$, which has a gauge non-covariant form, is difficult to determine. Here I work out the size of the errors made in improvement coefficients and physical quantities if one does not include the $c_{NGI}$ term.

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