N. Ishizuka et al., VIABILITY OF PERTURBATIVE RENORMALIZATION FACTORS IN LATTICE QCD CALCULATION OF THE K(0)-(K)OVER-BAR-0 MIXING MATRIX, Physical review letters, 71(1), 1993, pp. 24-26
Validity of perturbative estimation of renormalization factors in weak
matrix element calculations in lattice QCD is examined for the K0-K0B
AR mixing matrix by comparing results for gauge invariant and noninvar
iant operators. A large disagreement found for uncorrected results for
the two cases is shown to be removed by the one-loop renormalization
factor. This indicates that the large scaling violation in the mixing
matrix previously reported is not due to an artifact of prescription o
f lattice calculations. Our estimate of B(K) for the continuum in quen
ched QCD is 0.61(13)-0.83(7).