Speaker
Mrs
Evelina Marinova
(INFN Sezione di Perugia)
Description
We report the latest results on rare kaon decays from NA48/2 experiment. Samples of 7200 reconstructed K+- -> pi+- e+ e-, and more than 3000 K+- -> pi+- mu+ mu- events, with very small background contamination, have been collected. The latter is exceeding the total existing statistics by a factor of five. A precise measurement of the branching fractions and the form factors of the rare decays K+- -> pi+- l+ l- has been performed using different theoretical models.
The precise measurement of direct photon emission (DE) in the decay K+- -> pi+- pi0 gamma and its interference (INT), with the INT amplitude being observed for the first time, has been finalized. This study is based on the full NA48/2 data set with about 600k reconstructed K+- -> pi+- pi0 gamma decays which is factor of 30 larger than for previous experiments. We report the results on the CP violating asymmetry between K+ and K- obtained from rare kaon decays.
Primary author
Mrs
Evelina Marinova
(INFN Sezione di Perugia)
