22-29 July 2015
Europe/Vienna timezone

First observation of K->pi+pi0e+e- decay at NA48

Jul 24, 2015, 12:20 PM


talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries


Riccardo Fantechi (INFN - Sezione di Pisa)


We report the first observation of the very rare decay K+- -> pi+- pi0 e+ e- by the NA48/2 experiment. From a clean sample of almost 2000 reconstructed signal events, we have determined the branching fraction with high precision and measured the e+ e- invariant mass distribution, which allows to differentiate between different decay models.

Primary author

Cristina Lazzeroni (University of Birmingham (GB))

Presentation materials