Tracking down penguins at the poles

Details Tracking down penguins at the poles Tracking down penguins at the poles

2006-05-14

arxiv.org/abs/hep-ph/0605165v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 4 figures. Talk given at the 41th Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile,

Scientific paper

QCD penguins are responsible for about 2/3 of the Delta I=1/2 rule in K to pi
pi decays, as inferred from a combined analysis of K to pi pi and KL to gamma
gamma. Further tests based on the decays KS to pi0 gamma gamma and K+ to pi+
gamma gamma are proposed. New insights into the treatment of pi0, eta, eta'
pole amplitudes are also reported.

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