Relatore
Jacopo Pinzino
(INFN-Pisa)
Descrizione
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.
Autore principale
Cristina Lazzeroni
(University of Birmingham)
