Low energy kaon-nuclei interaction studies through the Σ^0π^0 channel with the KLOE detector

Abstract: The AMADEUS experiment aims to perform precision studies in the sector of low-energy kaon-nuclei interaction at the DA\Phi NE collider at LNF-INFN, implementing a dedicated setup in the central region of the KLOE detector. As a first step towards the AMADEUS realization the existing KLOE data (runs from 2002 to 2005) were analysed using the detector itself as an active target. K^- nuclear interactions in the gas filling the KLOE drift chamber (Helium 90% and Isobutane 10%) and the drift chamber entrance wall (mainly Carbon) were explored. Starting point was the reconstruction of the \Lambda(1116) trough its decay into a proton and a pion (BR = 63.9 \pm 0.5%). Taking advantage of the good performances of the KLOE calorimeter in detecting photons we then focused on the investigation of the \Lambda(1405), through its decay into \Sigma^0\pi^0. The details of the \Sigma^0 \pi^0 analysis and preliminary results are presented.