VIABILITY OF PERTURBATIVE RENORMALIZATION FACTORS IN LATTICE QCD CALCULATION OF THE K(0)-(K)OVER-BAR-0 MIXING MATRIX

Authors
ISHIZUKA N FUKUGITA M MINO H OKAWA M SHIZAWA Y UKAWA A
Citation
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
Citations number
15
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
1
Year of publication
1993
Pages
24 - 26
Database
ISI
SICI code
0031-9007(1993)71:1<24:VOPRFI>2.0.ZU;2-D
Abstract
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).