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Scheinast, W; Böttcher, I; Debowski, M; Dohrmann, F; Förster, A; Grosse, E; Koczoń, P; Kohlmeyer, B; Laue, F; Menzel, M; Naumann, L; Schwab, E; Senger, P; Shin, Y; Ströbele, H; Sturm, C; Surówka, G; Uhlig, F; Wagner, A; Waluś, W; Kämpfer, B; Barz, H W
Physical review letters, 02/2006, Volume: 96, Issue: 7Journal Article
Differential production cross sections of K+/- mesons have been measured in p + C and p + Au collisions at 1.6, 2.5, and 3.5 GeV proton beam energy. At beam energies close to the production threshold, the K- multiplicity is strongly enhanced with respect to proton-proton collisions. According to microscopic transport calculations, this enhancement is caused by two effects: the strangeness exchange reaction NY --> K- NN and an attractive in-medium K- N potential at saturation density.
