Some new results in O(a) improved lattice QCD

Details Some new results in O(a) improved lattice QCD Some new results in O(a) improved lattice QCD

1996-08-09

arxiv.org/abs/hep-lat/9608049v1

Nucl.Phys.Proc.Suppl. 53 (1997) 905-913

Physics

High Energy Physics

High Energy Physics - Lattice

Talks presented at LATTICE96(improvement), 9 LaTeX pages plus 5 postscript figures, espcrc2.sty (included)

Scientific paper

10.1016/S0920-5632(96)00815-8

It is shown how on-shell O(a) improvement can be implemented non-perturbatively in lattice QCD with Wilson quarks. Improvement conditions are obtained by requiring the PCAC relation to hold exactly in certain matrix elements. These are derived from the QCD Schr\"odinger functional which enables us to simulate directly at vanishing quark masses. In the quenched approximation and for bare couplings in the range $0\leq g_0\leq 1$, we determine the improved action, the improved axial current, the additive renormalization of the quark mass and the isospin current normalization constants Z_A and Z_V.

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