Jul 10 – 17, 2019
Ghent
Europe/Brussels timezone

First observation and study of the K± → π±π0e+e− decay with the NA48/2 experiment at CERN

Jul 11, 2019, 6:10 PM
20m
Campus Ledeganck - Aud. 6 (Ghent)

Campus Ledeganck - Aud. 6

Ghent

Parallel talk Flavour Physics and CP Violation Flavour Physics and CP Violation

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.

Primary authors

Patrizia Cenci (INFN Perugia (IT)) Giuseppina Anzivino (INFN and University of Perugia)

Presentation materials