Speaker
Giuseppina Anzivino
(INFN and University of Perugia)
Description
The NA48/2 experiment at CERN reports the first observation of the K± → π±π0e e− decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003−2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region. The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated.
Authors
Patrizia Cenci
(INFN Perugia (IT))
Giuseppina Anzivino
(INFN and University of Perugia)
