Non-perturbative renormalization of vector and axial vector currents in quenched QCD for a renormalization group improved gauge action

Details Non-perturbative renormalization of vector and axial vector currents in quenched QCD for a renormalization group improved gauge action Non-perturbative renormalization of vector and axial vector currents in quenched QCD for a renormalization group improved gauge action

2003-09-30

arxiv.org/abs/hep-lat/0309185v1

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2003(improve), 3 pages

Scientific paper

Renormalization constants of vector ($Z_V$) and axial-vector ($Z_A$) currents are determined non-perturbatively in quenched QCD for an RG-improved gauge action and a tadpole-improved clover quark action using the Schr\"odinger functional method. Meson decay constants $f_\rho$ and $f_\pi$ show much better scaling when $Z_V$ and $Z_A$ estimated for infinite physical volume are used instead of $Z$-factors from tadpole-improved one-loop perturbation theory.

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