Low energy kaon-nuclei interaction studies through the Sigma^0pi^0 channel with the KLOE detector

The AMADEUS experiment aims to perform precision studies in the sector of low-energy kaon-nuclei interaction at the DAPhi 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^0pi^0. The details of the Sigma^0 pi^0 analysis and preliminary results are presented.