Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

Precise measurement of the Decay K± ➞ π0 π0 µ± ν

Jul 7, 2022, 5:17 PM
Room 9 (Indaco)

Room 9 (Indaco)

Parallel Talk Quark and Lepton Flavour Physics Quark and Lepton Flavour Physics


Dmitry Madigozhin


We report the first observation of the decay K± → π0 π0 μ± ν (K00µ4) by the NA48/2 experiment at the CERN-SPS. From 2437 detected signal candidates with a S/B ratio of about 6, the branching ratio of the decay is determined with high precision. The result is converted into a first measurement of the R form factor in Kl4 decays and compared with the prediction from 1-loop Chiral Perturbation Theory.

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