Nonperturbative determination of the axial current normalization constant in 0( a) improved lattice QCD
Abstract
A finitesize 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, withaffe nonperturbatively determined coefficients. With little additional work the normalization constant Z_{V} of the improved isospin current is also obtained.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1997
 DOI:
 10.1016/S05503213(97)000874
 arXiv:
 arXiv:heplat/9611015
 Bibcode:
 1997NuPhB.491..344L
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 25 pages, 5 Postscript figures, TeX