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HK: Fachverband Hadronen und Kerne
HK 49: Nuclear Structure and Dynamics II
HK 49.3: Talk
Wednesday, March 18, 2009, 14:45–15:00, H-ZO 50
Pion induced production of hypernuclei — •Stefan Bender1, Horst Lenske1, Ulrich Mosel1, and Radhey Shyam2 — 1Institut für Theoretische Physik, Universität Giessen, Germany — 2Saha Institute of Nuclear Physics, Kolkata, India
We investigate strangeness production in coherent pion-nucleus reactions, in particular the production of Λ-hypernuclei. The interactions of the incoming and outgoing particles with the target nucleus are described by realistic pion-nucleus and kaon-nucleus potentials, respectively. We describe the transition to the KΛ channel with a field-theoretical resonance model, which has already been successfully applied to calculate proton induced production of hypernuclei. The Λ bound states as well as the in-medium interactions are calculated in fully relativistic models. Results for cross sections on various nuclear targets are discussed. Optical potentials are discussed and distortion effects are investigated by DWBA and eikonal methods. The characteristic dependence of the shape of the angular distribution on the angular momentum of the orbital which is populated by the Λ provides important information on the spectroscopy of the final hypernucleus.