Non-perturbative determination of the axial current normalization constant in O(a) improved lattice QCD

Details Non-perturbative determination of the axial current normalization constant in O(a) improved lattice QCD Non-perturbative determination of the axial current normalization constant in O(a) improved lattice QCD

1996-11-15

arxiv.org/abs/hep-lat/9611015v1

Nucl.Phys. B491 (1997) 344-364

Physics

High Energy Physics

High Energy Physics - Lattice

25 pages, 5 Postscript figures, TeX

Scientific paper

10.1016/S0550-3213(97)00087-4

A finite-size technique is employed to compute the normalization constant $Z_A$ of the isovector axial current in lattice QCD. The calculation is carried out in the quenched approximation for values of the bare gauge coupling $g_0$ ranging from 0 to 1. In the lattice action and the lattice expression for the axial current we include the counterterms required for O(a) improvement, with non-perturbatively determined coefficients. With little additional work the normalization constant $Z_V$ of the improved isospin current is also obtained.

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