Low energy dynamics and the ππ scattering lengths from the NA48/2 experiment at CERN

Abstract

The observation of a cusp-like structure in the M00 invariant mass distribution in the decay K ± → π±π0π0 by the NA48/2 experiment at CERN has given a renewed interest in the ππ scattering lengths. We report the result of a study of a partial sample of 2.3 × 10 decays, the observation of an anomaly in the ππ mass spectrum in the region around M00 = m… (More)

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