Speakers
Description
Present data sample of 8 fb$^{-1}$ collected by KLOE and KLOE-2 experiments at the upgraded DA$\Phi$NE collider of the INFN Laboratori Nazionali di Frascati corresponds to the largest sample ever collected at the $\phi$(1020) meson peak at an $e^+e^-$ collider - $2.4\times10^{10}$ $\phi$-mesons produced.
The lepton charge asymmetry measured in $K_S$ semileptonic decays with 1.7 fb$^{−1}$ of KLOE data, improving the statistical uncertainty of the present result by about a factor two, will be presented together with the test of CPT in transitions in $\phi\to K_SK_L\to\pi e\nu,3\pi^0$ and $\pi e\nu,2\pi$ decays. Latest results on $K_S$ rare decays will be discussed in the framework of Flavour Physics and CP Violation tests. Among these the first measurement ever on the $K_S\to\pi\mu\nu$ branching ratio at a 4.4% total accuracy, using 1.7 fb$^{-1}$ KLOE data allowing a new determination of the $V_{us}$ CKM matrix element and the test of lepton-flavour universality using $K_S$ mesons, and the search for the pure CP-violating $K_S\to3\pi^0$ decay with the newly acquired KLOE-2 data set.
