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Study of the Rare Decay K+- to pi+- gamma gamma at NA48/2 and NA62

Speaker: Cristina Lazzeroni

A sample of about 300 K+- --> pi+- gamma gamma rare decays with a background contamination below 10% has been collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configuration. The presented measurements of the decay spectrum and rate provide a crucial test of the Chiral Perturbation Theory (ChPT) describing weak low energy processes.
Kaon13 Conference,
Apr 30, 2013, 7:24 AM