Speaker
Andreas Winhart
(Institut fur Physik)
Description
We report on the measurements of the branching ratios and form factors for the rare decays K+- -> pi+- l+ l- done with the full NA48/2 data set. Our results improve the existing world averages significantly and the CP violating asymmetry between K+ and K- in this channel results to be less than a few percent. In addition, the branching ration of the decay KS --> pi pi e e has been measured, and the result is used to set an upper limit on the presence of E1 direct emission in the decay amplitude. The CP-violating asymmetry has been also measured.
Primary author
Collaboration NA48
(CERN)
