Investigation of the low energy kaons hadronic interactions in light nuclei by AMADEUS

The AMADEUS experiment aims to provide unique quality data for K− interaction with nucleons and light nuclei, both at-rest and in-flight (for K− momenta of about 100 MeV). The goal is to solve longstanding open issues in the non-perturbative Proceedings of the International Conference on Exotic Atoms and Related Topics (EXA 2014), Vienna, Austria, 15-19 September 2014. K. Piscicchia [email protected] 1 INFN Laboratori Nazionali di Frascati, Frascati (Roma), Italy 2 Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Roma, Italy 3 Stefan-Meyer-Institut für subatomare Physik, Vienna, Austria 4 Physics Department, University of Zagreb, Zagreb, Croatia 5 Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Magurele, Romania 6 Excellence Cluster Universe, Technische Universität München, Garching, Germany 7 Politecnico di Milano, Dipartimento di Elettronica, Informazione e Bioingegneria and INFN Sezione di Milano, Milano, Italy 8 INFN Sez. di Roma I and Institute Superiore di Sanita’, Roma, Italy 9 Institute of Physics, Jagiellonian University, Cracow, Poland 10 Universidade de Santiago de Compostela, Santiago de Compostela, Spain 10 K. Piscicchia et al. QCD in the strangeness sector, like the nature of the Λ(1405) state, the resonant versus non-resonant yield in nuclear K− capture and the properties of kaonic nuclear clusters which are strongly related to the multi-nucleon absorption processes. We can take advantage of the DAΦNE collider representing a unique source of monochromatic low-momentum kaons, whose nuclear interaction with the materials of the KLOE detector (used as an active target) furnish us excellent acceptance and resolution data for K− capture on H, 4He, 9Be and 12C, both at-rest and in-flight. AMADEUS step 0 consisted in the analysis of the 20042005 KLOE data. A second step consisted in the implementation in the central region of the KLOE detector of a pure graphite target, providing a high statistic sample of K− 12C nuclear captures at rest. For the future, new setups for various dedicated targets are under preparation.