Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15-GeV/c
Keywords
four-pi-detector: experimental results, Darmstadt SIS, pi- nucleus: inclusive reaction, pi- nucleon: exclusive reaction, K0: hadroproduction, mass spectrum: (pi_s16 pi-), K0: momentum spectrum, K nucleon: potential, cross section: mass number, nuclear matter: density, meson quark: coupling, transport theory, string model, pi nucleus --> K0 anything, p nucleus --> hyperon K0, 1.15 GeV/c
Abstract
The K0 meson production by pi- mesons of 1.15 GeV/c momentum on C, Al, Cu, Sn and Pb nuclear targets was measured with the FOPI spectrometer at the SIS accelerator of GSI. Inclusive production cross-sections and the momentum distributions of K0 mesons are compared to scaled elementary production cross-sections and to predictions of theoretical models describing the in-medium production of kaons. The data represent a new reference for those models, which are widely used for interpretation of the strangeness-production in heavy-ion collisions. The presented results demonstrate the sensitivity of the kaon production to the reaction amplitudes inside nuclei and point to the existence of a repulsive KN-potential of 20_s16-5 MeV at normal nuclear matter density.
