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Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 11: Poster Session: Electromagnetic and Hadronic Probes

HK 11.21: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

Study of the reaction npppπ with a deuteron beam and spectator tagging — •Eberhard Kuhlmann — IKTP, TU Dresden

Differential angular and momentum distributions for π production in np collisions have been measured by use of a d-beam at pd=1.85 GeV/c with the COSY-TOF large acceptance spectrometer. By spectator-proton tagging, the underlying Fermi momentum which differs from event to event could be determined thus allowing a scan of a range of approximately 50 MeV above threshold at just one beam energy. The preliminary results will be discussed in comparison with neighboring single-pion producing reactions such as ppppπ0 and pppnπ+, a decomposition in terms of the isospin dependent partial cross sections σIi,If will be given.

Supported by BMBF and FZ Jülich

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