TTP - TTP06-18 Tracking down penguins at the poles

Institute for Theoretical Particle Physics (TTP)

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.

Jean-Marc Gerard, Christopher Smith, Stephanie Trine

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TTP06-18 Tracking down penguins at the poles

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