Article

# RPA calculation of K+-nucleus cross sections with a density-dependent Dirac-Brueckner NN interaction

Centre d'Etudes Nucléaires de Bordeaux-Gradignan, Université Bordeaux I, rue du Solarium, 33175 Gradignan Cedex, France22UMR CNRS 6426.
(Impact Factor: 2.2). 07/1995; 589(4):609-619. DOI: 10.1016/0375-9474(95)00126-L

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 relativistic NN interaction reproducing the saturation curve of a Dirac-Brueckner calculation providing a good description of nuclear matter has been used. The agreement with experiment is considerably improved.

### Full-text preview

Available from: hal.in2p3.fr
• ##### Article: Relativistic RPA response functions for quasielastic electron scattering with a density-dependent NN interaction
[Hide abstract]
ABSTRACT: The longitudinal and transverse response functions as well as the Coulomb sum for quasielastic electron scattering on 12C, 40Ca, 48Ca, 56Fe and 208Pb have been calculated taking into account relativistic RPA correlations. For these calculations a density-dependent relativistic NN interaction reproducing the saturation curve of a Dirac-Brueckner calculation providing a good description of nuclear matter has been used. The agreement with experiment is considerably improved for nuclei ranging from 40Ca to 208Pb, but not for a relatively light nucleus like 12C.
No preview · Article · Dec 1995 · Nuclear Physics A
• ##### Article: Total cross sections for K+ scattering on light nuclei
[Hide abstract]
ABSTRACT: In the calculation of the ${\mathit{K}}^{+}$ nucleus total cross sections, the coupling of the mesons exchanged between the ${\mathit{K}}^{+}$ and the target nucleons to the polarization of the Fermi and Dirac seas has been taken into account in the random-phase approximation. The agreement with experiment is improved for nuclei ranging from $^{12}\mathrm{C}$ to $^{40}\mathrm{Ca}$ but not for a light dilute nucleus like $^{6}\mathrm{Li}$. The dependence of the cross sections on the target nucleon number is analyzed. \textcopyright{} 1996 The American Physical Society.
No preview · Article · May 1996 · Physical Review C
• Source
##### Article: Medium effects in K^+ nucleus interaction from consistent analysis of integral and differential cross sections
[Hide abstract]
ABSTRACT: Self consistency in the analysis of transmission measurements for K^+ on several nuclei in the momentum range of 500-700 MeV/c is achieved with a "t_{eff}(rho)rho" potential and new results are derived for total cross sections. The imaginary part of the t_{eff} amplitude is found to increase linearly with the average nuclear density in excess of a threshold value. This phenomenological density dependence of the K^+ nucleus optical potential also gives rise to good agreement with recent measurements of differential cross sections for elastic scattering of 715 MeV/c K^+ by Li^6 and C. Comment: 11 pages, RevTeX, 2 Postscript figures, submitted Phys. Lett. B
Preview · Article · Dec 1996 · Physics Letters B