Dirac sea effects in $K^{+}$ scattering from nuclei

Abstract

The ratio $R_T$ of $K^{+}{-}^{12}C$ to $K^{+}-d$ cross sections has been calculated microscopically using a boson-exchange $KN$ amplitude in which the $\sigma$ and $\omega$ mesons are dressed by the modifications of the Dirac sea in nuclear matter. In spite of the fact that this dressing leads to a scaling of the mesons effective mass in nuclear matter, the effect on the $R_T$ ratio is found to be weak.

Comments: 8 pages, LaTeX, 2 figures available upon request, LPTB-93-7