Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c

Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c

Benabderrahmane, M. L.; Herrmann, N.; Wisniewski, K.; Kecskemeti, J.; Andronic, A.; Barret, V.; Basrak, Z.; Bastid, N.; Buehler, P.; Cargnelli, M.; Caplar, R.; Cordier, E.; Deppner, I.; Crochet, P.; Dupieux, P.; Dzelalija, M.; Fabbietti, L.; Fodor, Z.; Gasik, P.; Gasparic, I.; Grishkin, Y.; Hartmann, O. N.; Hildenbrand, K. D.; Hong, B.; Kang, T. I.; Kienle, P.; Kirejczyk, M.; Kim, Y. J.; Kis, M.; Koczon, P.; Korolija, M.; Kotte, R.; Lebedev, A.; Leifels, Y.; Lopez, X.; Manko, V.; Marton, J.; Mangiarotti, A.; Merschmeyer, M.; Matulewicz, T.; Petrovici, M.; Piasecki, K.; Rami, F.; Reischl, A.; Reisdorf, W.; Ryu, M. S.; Schmidt, P.; Schuttauf, A.; Seres, Z.; Sikora, B.; Sim, K. S.; Simion, V.; Siwek-Wilczynska, K.; Smolyankin, V.; Suzuki, K.; Tyminski, Z.; Widmann, E.; Xiao, Z. G.; Yamazaki, T.; Yushmanov, I.; Zhang, X. Y.; Zhilin, A.; Zmeskal, J.; Bratkovskaya, E.; Cassing, W.

The K0 meson production by pi- mesons of 1.15 GeV/c momentum on various 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 the elementary production cross-sections and to QMC and HSD model predictions. The results point to modifications of the elementary reactions amplitudes inside nuclei and to the existence of a repulsive KN potential of about 20 MeV at normal nuclear matter density.

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