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ID 14569
file
e054503.pdf 209 KB
creator
JLQCD, Collaboration
Aoki, S
Fukugita, M
Hashimoto, S
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kuramashi, Y
Ukawa, A
Yoshié, T
NDC
Physics
abstract
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.
journal title
Physical Review D
volume
Volume 58
start page
054503
date of issued
1998
publisher
The American Physical Society
issn
1550-7998
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1998 The American Physical Society
relation is version of URL
http://dx.doi.org/10.1103/PhysRevD.58.054503
department
Graduate School of Science