München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 9: Elektromagnetische und Hadronische Sonden
HK 9.8: Vortrag
Montag, 20. März 2006, 18:30–18:45, G
Fermi motion effects in K+A elastic scattering based on K+N phase shifts — •Hugo F. Arellano1 and H. V. von Geramb2 — 1Physics Department - FCFM, University of Chile, Av. Blanco Encalada 2008, Santiago, Chile — 2Theoretische Kernphysik, Universität Hamburg, Luruper Chaussee 149, D-22761, Hamburg, Germany
The role of the nuclear Fermi motion and its implied off-shell effects is discussed within a microscopic description for K+-nucleus elastic scattering. Emphasis is made on the use of K+N bare potentials which reproduce the available phase-shift data. To this effect we have generated Gel’fand-Levitan-Marchenko real and local inversion potentials constrained to current K+N phase shifts analyses from the NDC Data Analysis Center [1]. These potentials, supplemented with a short range non-Hermitian separable term, provide an exact representation of the unitary and non-unitary S matrices. The resulting effective interaction, in the form of the free-space off-shell t matrix, is then convoluted with the target ground state as prescribed by the full-folding optical model approach for K+A scattering [2]. Applications to elastic collisions of K+ from light closed-shell nuclei in the 400-1000 MeV/c momentum range are presented and results are discussed.
[1] R. A. Arndt et. al, http://gwdac.phys.gwu.edu/
[2] H. F. Arellano and H. V. von Geramb, Phys. Rev. C 72, 025203 (2005) Partial support provided by FONDECYT under Grant 1040938.