Abstract
The KLOE and KLOE-2 experiments at the Laboratori Nazionali di Frascati (Italy) collected almost 8 fb−1 of integrated luminosity at the energy equal to the mass of ϕ meson. The excellent time resolution of the electromagnetic calorimeter and the very good accuracy on both momentum and vertex reconstruction of the tracking system allow to study discrete symmetries to the utmost precision as well as light meson spectroscopy, dark forces searches, hadronic cross-section measurements and studies of γγ-physics. CPT symmetry test with the lepton charge asymmetry measured in KS semileptonic decays with 1.7 fb−1 of KLOE data, tests of time reversal and CPT in transitions in $\phi \to {K_S}{K_L} \to \pi ev,\,3{\pi ^0}(2{\pi ^0})$ decays with newly acquired data with the KLOE-2 detector will be presented and discussed.
Highlights
The K LOng Experiment (KLOE) is located at electron-positron col√lider DAΦNE in Frascati near Rome
CPT symmetry test with the lepton charge asymmetry measured in KS semileptonic decays with 1.7 fb−1 of KLOE data, tests of time reversal and CPT in transitions in φ → KS KL → πeν, 3π0(2π0) decays with newly acquired data with the KLOE-2 detector will be presented and discussed
The experimental setup common to KLOE and KLOE-2 consists of cylindrical drift chamber (DC) and electromagnetic calorimeter (EMC)
Summary
The K LOng Experiment (KLOE) is located at electron-positron col√lider DAΦNE in Frascati near Rome. The KLOE-2 detector is equipped with a set of new detectors [3]: (i) the Inner Tracker based on 4 layers of Cylindrical Gas Electron Multiplier detector aiming at improving tracking and vertexing resolution close to the interaction point, (ii) crystal (CCALT) [4] and tile (QCALT) [5] calorimeters covering the low polar angles and improving the detection of the photons that are coming from KL decays in the drift chamber, respectively, (iii) the two pairs of small angle tagging devices that allows to detect the low (Low Energy Tagger [6]) and high (High Energy Tagger [7]) energy e+e− originated from e+e− → e+e−X reactions
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