K+-nucleus elastic scattering at intermediate energies

Abstract

Using the Coulomb modified Glauber model, we analyze the elastic angular distribution and reaction (σ R ) and total (σ tot ) cross sections of K + -12 C at 635, 715, and 800 MeV/c, and of K + -40 Ca at 800 MeV/c. The basic (input) K + N amplitude is taken from the phase shift analysis, and for nuclear form factors we use the nucleon density distributions as obtained from the analyses of intermediate energy proton scattering experiments and the relativistic mean field (RMF) calculations. The analysis also considers the nuclear medium effects, and predicts the in-medium behavior of the K + N amplitude. We find that the elastic angular distribution is sensitive to the choice of the nucleon density distributions, whereas the nuclear medium effects are better seen in the study of reaction and total cross sections.

Color transparency of K+ mesons in inclusive ( e,e′ ) reactions on nuclei

“…Because of the failure of the conventional nuclear physics to explain the quoted data, several exotic mechanisms for the K + meson-nucleus scattering have been proposed. These include modification of the in-medium nucleon size/mass [1,4], medium modification of the elementary K + mesonnucleon scattering amplitude [5], virtual pion contribution [6], mesons exchange currents [7], long range correlations [8], and various other mechanisms [9].…”