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Titolo:
Penguin diagrams in the Delta I=1/2 rule and epsilon '/epsilon with sigma models - art. no. 014002
Autore:
Harada, M; Keum, YY; Kiyo, Y; Morozumi, T; Onogi, T; Yamada, N;
Indirizzi:
Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan Nagoya Univ Nagoya Aichi Japan 4648602 Phys, Nagoya, Aichi 4648602, Japan KEK, Theory Grp, Tsukuba, Ibaraki 3050801, Japan KEK Tsukuba Ibaraki Japan 3050801 ry Grp, Tsukuba, Ibaraki 3050801, Japan Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan Hiroshima UnivHigashihiroshima Japan 7398526 hihiroshima 7398526, Japan
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 1, volume: 6201, anno: 2000,
pagine: 4002 -
SICI:
0556-2821(20000701)6201:1<4002:PDITDI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRANGE-QUARK MASS; DYNAMICAL WILSON FERMIONS; HADRONIC MATRIX-ELEMENTS; PI-PI-SCATTERING; LATTICE QCD; SUM-RULES; LEADING LOGARITHMS; CHIRAL EXPANSION; CP-VIOLATION; LARGE MT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Harada, M Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan Nagoya Univ Nagoya Aichi Japan 4648602 ya, Aichi 4648602, Japan
Citazione:
M. Harada et al., "Penguin diagrams in the Delta I=1/2 rule and epsilon '/epsilon with sigma models - art. no. 014002", PHYS REV D, 6201(1), 2000, pp. 4002

Abstract

We study the correlation between epsilon'/epsilon and the Delta I = 1/2 rule in the frame-work of the nonlinear sigma model including scalar mesons. Using this model we estimate the chiral corrections by resumming to all orders in chiral perturbation theory, the contribution of a class of diagrams within the factorization approximation. With these matrix elements and changing the scalar meson mass, we find that there is a correlation between epsilon'/epsilon and the Delta 1 = 1/2 amplitude. However, it is difficult to explain both epsilon'/epsilon and the Delta I = 1/2 amplitude simultaneously. In order to be compatible with epsilon'/epsilon, typically, about half of the Delta I = 1/2 amplitude can be explained at most. Our result suggeststhere may be a substantial nonfactorizable contribution to CP conserving K--> pi pi amplitudes.

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Documento generato il 24/09/20 alle ore 10:43:40