Probing of in-medium hadron structure with HADES

The High Acceptance DiElectron Spectrometer (HADES) has been recently commissioned at GSI Darmstadt. It has been designed to study hadron properties inside nuclear matter via measurements of dielectron decays in proton, pion and heavy ion induced reactions in 1 − 2  AGeV energy range. We report first preliminary results on invariant masses of e + e − pairs measured in 12 C + 12 C collisions at E = 2  AGeV and compare them to simulations based on UrQMD transport model. In summary we present and discuss planned experiments.