München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 21: Postersitzung

HK 21.22: Poster

Dienstag, 21. März 2006, 15:30–17:00, P

Investigation of dd → α π⁰ with WASA at COSY — •Paweł Podkopał — Institut für Kernphysik, Forschungszentrum Jülich — Institute of Physics, Jagiellonian University, Cracow

In summer 2005 the WASA detector has been transfered from Uppsala to Jülich and is currently being setup at COSY. One key experiment which will be investigated is dd → α π⁰ giving new insight into isospin symmetry breaking. The measurement is based on detection of the forward going α particle in coincidence with the two decay photons of π⁰. The acceptance of WASA allows the extraction of angular distributions starting from Q ≈ 60 MeV, which will be used to study the onset of p-waves. Taking into account the small cross section of a few pb, possible background reactions have to be considered carefully. Thus, the reaction dd → α π⁰ and various background channels like dd → ³H p π⁰, dd → ³He n π⁰, etc. have been simulated using the Geant3 based Wasa Monte Carlo package. The status of the simulations will be presented and the feasibility of the experiment will be discussed.