K−-Nucleus Interaction and Its Interpretation

Abstract

Optical-model analysis of x-ray transitions in $K$-mesic atoms gives an "effective" $\overline{K}-N$ scattering length $\overline{a}=\left[\right(0.44\mathrm{}\pm 0.04)+(0.83\pm 0.07\left)i\right]$ F. The large change in $\mathrm{Re}\overline{a}$ from the free value is explained by assuming additivity of the $\overline{K}N$ potentials.