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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 11.20: Poster

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

Investigation of the np interaction — •Hartmut Machner — Inst. f. Kernphysik FZ Jülich

The np interaction was studied via its final state interaction in a reaction ppnpπ+ at an incident beam momentum of 1640 MeV/c. This is a much higher momentum than previous studies. The pion was detected in a high resolution experiment using the 3Q2D magnetic spectrograph at COSY. Due to the high resolution and low background envirement the range of the ppdπ+ and the ppnpπ+ reactions were well separated. Almost all of the data is due to spin-triplett interaction. An upper limit for the spin-singulett fraction is given.

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