arXiv:nucl-th/9910029·v1·Nuclear Theory
K -> pi pi and a light scalar meson
J.C.R. Bloch🇺🇸 · M.A. Ivanov🇷🇺 · T. Mizutani🇺🇸 · C.D. Roberts🇺🇸 · S.M. Schmidt🇺🇸
Abstract
We explore the Delta-I= 1/2 rule and epsilon'/epsilon in K -> pi pi transitions using a Dyson-Schwinger equation model. Exploiting the feature that QCD penguin operators direct K^0_S transitions through 0^{++} intermediate states, we find an explanation of the enhancement of I=0 K -> pi pi transitions in the contribution of a light sigma-meson. This mechanism also affects epsilon'/epsilon.
Comments: 7 pages, REVTEX