K+→π+π0 decay amplitude with the Wilson quark action in quenched lattice QCD
Physical Review D 58 巻
054503- 頁
1998 発行
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e054503.pdf
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種類 :
全文
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タイトル ( eng ) |
K+→π+π0 decay amplitude with the Wilson quark action in quenched lattice QCD
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作成者 |
JLQCD Collaboration
Aoki S
Fukugita M
Hashimoto S
Ishizuka N
Iwasaki Y
Kanaya K
Kuramashi Y
Ukawa A
Yoshié T
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収録物名 |
Physical Review D
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巻 | 58 |
開始ページ | 054503 |
抄録 |
We present a calculation for the K+→π+π0 decay amplitude using a quenched simulation of lattice QCD with the Wilson quark action at β=6/g2=6.1. The decay amplitude is extracted from the ratio, the K→ππ three-point function divided by either K and π meson two-point functions or K meson two-point function and I=2 ππ four-point function; the two different methods yield consistent results. Finite size effects are examined with calculations made on 243×64 and 323×64 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 BK obtained from the K+→π+π0 amplitude using chiral perturbation theory.
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NDC分類 |
物理学 [ 420 ]
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言語 |
英語
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資源タイプ | 学術雑誌論文 |
出版者 |
The American Physical Society
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発行日 | 1998 |
権利情報 |
Copyright (c) 1998 The American Physical Society
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出版タイプ | Version of Record(出版社版。早期公開を含む) |
アクセス権 | オープンアクセス |
収録物識別子 |
[ISSN] 1550-7998
[DOI] http://dx.doi.org/10.1103/PhysRevD.58.054503
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