Medium effects in K^+ nucleus interaction from consistent analysis of   integral and differential cross sections
  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. 
E. Friedman (1), A. Gal (1), J. Mares (2) ((1) Hebrew U. Jerusalem,   (2) INP Rez/Prague)