Speaker
Plamen Rumenov Petrov
(Universite Catholique de Louvain (UCL) (BE))
Description
New final results from an analysis of about 400 K+- --> pi+- gamma gamma rare decay candidates collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to Chiral Perturbation Theory (ChPT) description. The data support the ChPT prediction for a cusp in the di-photon invariant mass spectrum at the two pion threshold.
Author
Cristina Lazzeroni
(University of Birmingham (GB))
