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Erlangen 2001 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 43: Theorie VIII

HK 43.5: Talk

Thursday, March 22, 2001, 16:15–16:30, B

Production of hypernuclei via hadronic reactions — •Simona Briganti and Horst Lenske — Institut für Theoretische Physik, Universität Giessen, Deutschland

In the description of hadronic reactions leading to the production of Lambda hypernuclei (e.g. A+,K+)ΛA, A(K)ΛA), initial and final state interaction must be taken into account. In order to obtain realistic wave functions for the incoming and outgoing mesons the elastic scattering of pions and kaons on nuclei is investigated. The incident momenta considered for the pion beam are in the range of 600 MeV/c <plab < 900 MeV/c, those for the kaon beam are in the range of 600 MeV/c <plab < 800 MeV/c; the target nucleus is 12C. The calculations have been performed in the framework of the eikonal approximation; the optical potential used is given by the tρ approximation. The agreement between the calculated and the experimental angular distributions is in general good, even if the theoretical curves tend to lay below the data. The possible role of the 1st order non-eikonal correction in reducing this discrepancy has been investigated. Our finding is that the effect of this correction is very small, and mostly affects the depth of the diffraction minima. In order to improve the agreement between theory and experiment a substantial renormalization of both the real and imaginary part of the meson-nucleon scattering amplitude (that constitute part of the input for the optical potential) is needed.
Supported by DFG.

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