Phys. Rev. C 62, 025206 (2000) [9 pages]K⃗ππ and a light scalar mesonReceived 11 October 1999; published 21 July 2000 We explore the ΔI=1/2 rule and ε′/ε in K⃗ππ transitions using a Dyson-Schwinger equation model. Exploiting the feature that quantum chromodynamics penguin operators direct KS0 transitions through 0++ intermediate states, we observe an enhancement of K⃗ππI=0 transitions from the contribution of a putative light σ-meson. This mechanism also affects ε′/ε. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.62.025206
DOI:
10.1103/PhysRevC.62.025206
PACS:
13.20.Eb, 13.30.Eg, 12.15.Hh, 24.85.+p
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