1998年9月
K+->pi(+) pi(0) decay amplitude with the Wilson quark action in quenched lattice QCD
PHYSICAL REVIEW D
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- 巻
- 58
- 号
- 5
- 開始ページ
- 054503/1-054503/9
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 出版者・発行元
- AMER PHYSICAL SOC
We present a calculation for the K+ --> pi(+) pi(0) decay amplitude using a quenched simulation of lattice QCD with the Wilson quark action at beta = 6/g(2) = 6.1. The decay amplitude is extracted from the ratio, the K-->pi pi three-point function divided by either K and pi meson two-point functions or K meson two-point function and I = 2 pi pi four-point function; the two different methods yield consistent results. Finite size effects are examined with calculations made on 24(3) X 64 and 32(3) X 64 lattices, and are shown that they are explained by one-loop effects of chiral perturbation theory. The lattice amplitude is converted to the continuum value by employing a one-loop calculation of chiral perturbation theory, yielding a value in agreement with experiment if extrapolated to the chiral limit. We also report on the K meson B parameter B-K obtained from the K+ --> pi(+) pi(0) amplitude using chiral perturbation theory. [S0556-2821(98)03417-1]
- リンク情報
- ID情報
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- ISSN : 2470-0010
- eISSN : 2470-0029
- Web of Science ID : WOS:000075748700037