Vusand CP violation from kaon decays with the KLOE detector

The KLOE experiment has provided precise measurements of the branching ratio of the main neutral and charged kaon decay modes, of the Kland the K lifetimes, and of the Klvector and scalar form factors. We present a description of the above measurements and an overall fit of all our data, with particular attention to correlations. These data provide the basis for the determination of the value of the CKM matrix element Vusand a test of the unitarity of the quark mixing matrix. In addition our first measurement of the charge asimmetry in KSsemileptonic decays, AS, gaves us the possibility to contribute to the knowledge of () and testing the CPT symmetry through the Bell Steinberger relation. © 2009 IOP Publishing Ltd