Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 11: Poster Session: Electromagnetic and Hadronic Probes
HK 11.17: Poster
Dienstag, 9. März 2004, 13:30–15:30, Foyer
Strangeness production in proton - nucleus interactions at ANKE/COSY — •Y. Valdau — Forschungszentrum Jülich, 52425 Jülich
ANKE is a magnetic spectrometer and detection system at an internal target position of COSY-Jülich. The device permits to momentum analyze ejectiles from hadronic interactions with forward emission angles around 0∘. A major goal of the experimental program at ANKE is the investigation of proton-induced strangeness production in the nuclear medium. In a recent measurements the production of K+-mesons accompanied by protons or deuteron has been investigated at different beam energies Tp=1.0, 2.0, 2.3 GeV. These data may shed light on the reaction mechanism leading to kaon production in nuclei. Particularly, they supply direct evidence for the two-step reaction mechanism, with formation of intermediate pions, leading to kaon production. In addition, measurements with a deuterium target suggest that production cross section on neutron exceeds that on proton, and the corresponding ratio is close to 4. Supported by FZJ, WTZ, DFG.