Several 132 KL → e+e- μ+ μ- events were observed from the 1997 and 1999 runs of the KTeV experiments, with an estimated background of 0.8 events. In the first measurement of the parameter α using this decay mode, it was found that α=-1.59±0.37. No evidence was found for CP-violating contributions to the KLγ*γ* interaction.
|Original language||English (US)|
|Journal||Physical Review Letters|
|Publication status||Published - Apr 11 2003|
ASJC Scopus subject areas
- Physics and Astronomy(all)