Delta I = 1/2 enhancement and the Glashow-Schnitzer-Weinberg sum rule

Details Delta I = 1/2 enhancement and the Glashow-Schnitzer-Weinberg sum rule Delta I = 1/2 enhancement and the Glashow-Schnitzer-Weinberg sum rule

2000-01-21

arxiv.org/abs/hep-ph/0001221v1

Phys.Lett. B484 (2000) 251-254

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, including 2 ps figures

Scientific paper

10.1016/S0370-2693(00)00680-8

In 1967 Glashow, Schnitzer and Weinberg derived a sum rule in the soft-pion and soft kaon limit relating the Delta I=1/2 non-leptonic K->2pi amplitude to integrals over strange and non-strange spectral functions. Using the recent ALEPH data from tau-decay, we show that the sum rule, slightly modified to reduce contributions near the cut, yields the correct magnitude decay amplitude corresponding to the Delta I=1/2 rule.

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