RPA calculation of $K^{+}$-nucleus cross-sections with a density-dependent Brueckner-Hartree-Fock NN interaction

Abstract

In the calculation of the $K^{+}$-nucleus cross sections, the coupling of the mesons exchanged between the $K^{+}$ and the target nucleons to the polarization of the Fermi and Dirac seas has been taken into account. This polarization has been calculated in the one-loop approximation but summed up to all orders (RPA approximation). For this calculation a density-dependent Brueckner-Hartree-Fock NN interaction providing a good description of both nuclear matter and finite nuclei has been used. The agreement with experiment is considerably improved.

Comments: 7 pages, LaTeX, 1 figure available upon request, preprint CENBG-94-th1