$K^{+}\toÏ^{+}Ï^{0}$ Decay Amplitude in Quenched Lattice QCD

JLQCD Collaboration; S. Aoki; M. Fukugita; S. Hashimoto; N. Ishizuka; Y. Iwasaki; K. Kanaya; Y. Kuramashi; M. Okawa; A. Ukawa; T. Yoshie

doi:10.1016/S0920-5632(97)00747-0

paper

$K^{+} \to I ¨ ^{+} I ¨ ^{0}$ Decay Amplitude in Quenched Lattice QCD

arXiv:hep-lat/9711012 · doi:10.1016/S0920-5632(97)00747-0

Abstract

A new study is reported of a lattice QCD calculation of the $K^{+} \to I ¨ ^{+} I ¨ ^{0}$ decay amplitude with the Wilson quark action in the quenched approximation at $I^^{2} = 6.1$ . The amplitude is extracted from the $K \to I ¨ I ¨ $ Green function, and a conversion to the continuum value is made employing a recent one-loop calculation of chiral perturbation theory. The result is consistent with the experimental value if extrapolated to the chiral limit.

LaTeX, 3 pages, 3 figures, uses espcrc2 and epsfig. Talk presented at Lattice '97, Edinburgh, Scotland, July 1997

K+→I¨+I¨0 Decay Amplitude in Quenched Lattice QCD

Abstract

$K^{+} \to I ¨ ^{+} I ¨ ^{0}$ Decay Amplitude in Quenched Lattice QCD