We present the current status of the analysis of about 1.7 billion $K_{S}K_{L}$ pair events collected at DAFNE with the KLOE detector to determine the branching ratio of $K_{S} \rightarrow \pi e\nu$ decay and the lepton charge asymmetry. This sample is $\sim$ 4 times larger in statistics than the one used in a previous KLOE analysis, allowing us to improve the accuracy of the measurement and of the related tests of CPT symmetry and $\Delta S = \Delta Q$ rule.
number of pulisher's sheets:
0,21
affiliation:
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego