Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 11: Poster Session: Electromagnetic and Hadronic Probes

HK 11.22: Poster

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

Single-Pion Production at T_p = 400 MeV Measured at COSY-TOF^∗ — •E. Doroshkevich, H. Clement, A. Erhardt, J. Kress, R. Meier, and G.J. Wagner — Physikalisches Institut, Universität Tübingen

The single-pion production channels pp → dπ⁺, pp → pnπ⁺ and pp → ppπ⁰ have been measured exclusively at COSY at an incident proton energy of T_p = 400 MeV. For maximum coverage of the phase space of these reactions and minimum contributions from pion decay in flight the TOF spectrometer has been used in its short version. Track reconstruction is achieved by pixel informations from start, fiber, quirl and ring hodoscopes. Particle identification and particle kinetic energies have been obtained for particles detected in the central calorimeter. For particles detected at larger angles in the ring hodoscope the time-of-flight information has been utilized for the determination of their kinetic energy. This way the full event information is obtained with 4 overconstraints in case of the dπ⁺ channel and 1 overconstraint in case of ppπ⁰ and pnπ⁺ channels. For dπ⁺ the resulting angular distributions agree well with SAID. For the other channels our results are compared to data from previous experiments.
^∗supported by BMBF (06 TU 201), DFG (Europäisches Graduiertenkolleg) and FZ Jülich (FFE)