Mrs Caterina Bloise Collaboration KLOE-2 (LNF-INFN)
A phi-factory offers the possibility to select pure kaon beams: neutral kaons from phi → KSKL are in fact produced in pairs and the detection of a KS (KL) tags the presence of a KL (KS), the same holds for charged kaons. This allows to perform precise measurement of kaon properties. The KLOE experiment has measured most decay branching ratios of K_S, K_L amd K^+- mesons providing the basis for the determination of the CKM parameter V_us and the most precise test of the unitary of the quark flavor mixing matrix. We are presently finalizing new determinations of BR(K+- -> 3 charged pions), to complete the KLOE program of precise and fully inclusive measurements of the kaon dominant BR's, and finalizing the update of the upper limit on the branching ratio measurement of the CP-violating transition Ks -> 3pi0 (Phys. Lett. B619, 61,2005), using the complete data set. The neutral kaon system also offers unique possibilities to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. In particular a new analysis of the KLOE data is aiming at the measurement of the parameters describing the CPT and Lorentz symmetries breaking in the framework of the Standard-Model Extension (SME), and exploiting the EPR correlations in the neutral kaon pairs produced at DAPHNE. Prospects on further improvements at the KLOE-2 experiment, aiming at an integrated luminosity of about 20 fb-1 with an upgraded detector, will be also discussed.
Collaboration KLOE-2 (LNF-INFN)