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  1. 050 理学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

Calculation of Nonleptonic kaon decay amplitudes from Kπ matrix elements in quenched domain-wall QCD

http://hdl.handle.net/10191/27659
http://hdl.handle.net/10191/27659
0907fdc4-0988-4e13-a589-a6d23850e0d9
名前 / ファイル ライセンス アクション
68_1_014501.pdf 68_1_014501.pdf (2.8 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-06-23
タイトル
タイトル Calculation of Nonleptonic kaon decay amplitudes from Kπ matrix elements in quenched domain-wall QCD
タイトル
言語 en
タイトル Calculation of Nonleptonic kaon decay amplitudes from Kπ matrix elements in quenched domain-wall QCD
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Noaki, J.

× Noaki, J.

WEKO 16019

Noaki, J.

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Aoki, S.

× Aoki, S.

WEKO 16020

Aoki, S.

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Aoki, Y.

× Aoki, Y.

WEKO 16021

Aoki, Y.

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Burkhalter, R.

× Burkhalter, R.

WEKO 16022

Burkhalter, R.

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Ejiri, S.

× Ejiri, S.

WEKO 16023

Ejiri, S.

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Fukugita, M.

× Fukugita, M.

WEKO 16024

Fukugita, M.

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Hashimoto, S.

× Hashimoto, S.

WEKO 16025

Hashimoto, S.

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Ishizuka, N.

× Ishizuka, N.

WEKO 16026

Ishizuka, N.

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Iwasaki, Y.

× Iwasaki, Y.

WEKO 16027

Iwasaki, Y.

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Izubuchi, T.

× Izubuchi, T.

WEKO 16028

Izubuchi, T.

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Kanaya, K.

× Kanaya, K.

WEKO 16029

Kanaya, K.

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Kaneko, T.

× Kaneko, T.

WEKO 16030

Kaneko, T.

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Kuramashi, Y.

× Kuramashi, Y.

WEKO 16031

Kuramashi, Y.

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Lesk, V.

× Lesk, V.

WEKO 16032

Lesk, V.

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Nagai, K.I.

× Nagai, K.I.

WEKO 16033

Nagai, K.I.

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Okawa, M.

× Okawa, M.

WEKO 16034

Okawa, M.

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Taniguchi, Y.

× Taniguchi, Y.

WEKO 16035

Taniguchi, Y.

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Ukawa, A.

× Ukawa, A.

WEKO 16036

Ukawa, A.

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Yoshie, T.

× Yoshie, T.

WEKO 16037

Yoshie, T.

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CP-PACS, Collaboration

× CP-PACS, Collaboration

WEKO 16038

CP-PACS, Collaboration

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抄録
内容記述タイプ Abstract
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 K 0 →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 16 3 ×32×16 and 24 3 ×32×16 lattice at β=2.6 corresponding to the lattice spacing 1/a≈2GeV. 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%. 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 =1.3GeV with the renormalization group for N f =3 flavors, we calculate all the matrix elements needed for the decay amplitudes. With these matrix elements, the ΔI=3/2 decay amplitude ReA 2 shows a good agreement with experiment after an extrapolation to the chiral limit. The ΔI=1/2 amplitude ReA 0 , on the other hand, is about 50–60 % of 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 ɛ ′ /ɛ. The central values of our result indicate that the ΔI=3/2 contribution is larger than the ΔI=1/2 contribution so that ɛ ′ /ɛ 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 ɛ ′ /ɛ.
書誌情報 Physical Review D
en : Physical Review D

巻 68, 号 1, p. 014501, 発行日 2003-07
出版者
出版者 American Physical Society
ISSN
収録物識別子タイプ ISSN
収録物識別子 15507998
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00773624
DOI
識別子タイプ DOI
関連識別子 info:doi/10.1103/PhysRevD.68.014501
権利
権利情報 (C) 2003 American Physical Society
著者版フラグ
値 publisher
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