K→ππand a light scalar meson

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21 July 2000

journal article
research article
Published by American Physical Society (APS) in Physical Review C

Vol. 62 (2) , 025206
https://doi.org/10.1103/physrevc.62.025206

Abstract

We explore the

Δ I = \frac{1}{2}

rule and

ε^{'} / ε

in

\vec{K} π π

transitions using a Dyson-Schwinger equation model. Exploiting the feature that quantum chromodynamics penguin operators direct

K_{S}^{0}

transitions through

0^{+ +}

intermediate states, we observe an enhancement of

\vec{K} π π_{I = 0}

transitions from the contribution of a putative light

σ

-meson. This mechanism also affects

ε^{'} / ε .

Keywords

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Version 1, 1999-10-11, ArXiv

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