Measurement of the K_1hn0 inclusive cross section in pion-induced reactions at 1.15 GeV-c [Elektronische Ressource] / presented by Mohamed Lotfi Benabderrahmane

Dissertationsubmitted to theCombined Faculties for the Natural Sciences and for Mathematicsof the Ruperto-Carola University of Heidelberg, Germanyfor the degree ofDoctor of Natural Sciencespresented byMSc Mohamed Lotfi Benabderrahmaneborn in Mila, AlgeriaOral examination: 18th April, 20070Measurement of the K Inclusive Cross Sectionin Pion-Induced Reactions at 1.15GeV/cReferees: Prof. Dr. Norbert HerrmannProf. Dr. Johanna Stachel0The K production cross section and the phase-space distributions were mea-−sured in the reaction + nucleus at an incident momentum of 1.15 GeV/c for C,0Al, Cu, Sn and Pb. For the first time the system-size (A) dependence of the K2/3production cross section has been measured and shows an A dependence. The0experimental ratio of the K momentum distribution produced in Lead to that inCarbon shows a suppression at low momenta. A comparison to the corresponding+ratio of K measured in proton-induced reactions shows a good agreement, which0indicates the sensitivity of this observable to the K N potential. Comparisons toHSD transport model calculations show that this model is not able to describe0momentum and rapidity distributions of the K as well as the behaviour of the in-0clusive cross section as a function of A. Microscopic calculations of the K crosssection in nuclear matter including the KN potential in the final state interactionare in good agreement with the measurements.