| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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|
タイトル |
Calculation of nonleptonic kaon decay amplitudes from K→π matrix elements in quenched domain-wall QCD |
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言語 |
en |
| 作成者 |
Noaki, J.
Aoki, S.
Aoki, Y.
Burkhalter, R.
Ejiri, S.
Fukugita, M.
Hashimoto, S.
Ishizuka, N.
Iwasaki, Y.
Izubuchi, T.
Kanaya, K.
Kaneko, T.
Kuramashi, Y.
Lesk, V.
Nagai, K.I.
Okawa, Masanori
Taniguchi, Y.
Ukawa, A.
Yoshie, T.
CP-PACS, Collaboration
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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権利情報 |
Copyright (c) 2003 American Physical Soceity |
| 主題 |
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|
主題Scheme |
Other |
|
主題 |
lattice QCD |
| 主題 |
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|
主題Scheme |
Other |
|
主題 |
domain-wall fermion action |
| 主題 |
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|
主題Scheme |
NDC |
|
主題 |
420 |
| 内容記述 |
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|
内容記述 |
We explore the application of the domain wall fermion formalism of lattice QCD to calculate the K→ππ decay amplitudes in terms of the K +→π+ and K0→0 hadronic matrix elements through relations derived in chiral perturbation theory. Numerical simulations are carried out in quenched QCD using the domain-wall fermion action for quarks and a renormalization group-improved gauge action for gluons on a 163×32×16 and 243×32×16 lattice at β=2.6 corresponding to the lattice spacing 1/a≈2 GeV. Quark loop contractions which appear in Penguin diagrams are calculated by the random noise method, and the ΔI=1/2 matrix elements which require subtractions with the quark loop contractions are obtained with a statistical accuracy of about 10%.0 We investigate the chiral properties required of the K +→π+ matrix elements. Matching the lattice matrix elements to those in the continuum at μ=1/a using the perturbative renormalization factor to one loop order, and running to the scale μ=m c=1.3 GeV with the renormalization group for Nf=3 flavors, we calculate all the matrix elements needed for the decay amplitudes. With these matrix elements, the ΔI=3/2 decay amplitude ReA2 shows a good agreement with experiment after an extrapolation to the chiral limit. The ΔI =1/2 amplitude ReA0, on the other hand, is about 50-600f the experimental one even after chiral extrapolation. In view of the insufficient enhancement of the ΔI=1/2 contribution, we employ the experimental values for the real parts of the decay amplitudes in our calculation of ε′/ε. The central values of our result indicate that the ΔI=3/2 contribution is larger than the ΔI=1/2 contribution so that ε′/ε is negative and has a magnitude of order 10 -4. We discuss in detail possible systematic uncertainties, which seem too large for a definite conclusion on the value of ε′/ε. |
|
言語 |
en |
| 出版者 |
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出版者 |
American Physical Soceity |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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|
出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevD.68.014501 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://dx.doi.org/10.1103/PhysRevD.68.014501 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1550-7998 |
| 開始ページ |
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|
開始ページ |
014501 |
| 書誌情報 |
Physical Review D
Physical Review D
巻 68,
号 1,
p. 014501,
発行日 2003-07
|
| 旧ID |
14478 |
P028_e014501.pdf (555.5 KB)
