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HK: Fachverband Physik der Hadronen und Kerne
HK 23: Elektromagnetische und Hadronische Sonden
HK 23.8: Talk
Tuesday, March 11, 2008, 13:00–13:15, 1C
Pion production in d d→3He n π0 with WASA-at-COSY — •Paweł Podkopał for the WASA-at-COSY collaboration — Institut für Kernphysik, Forschungszentrum Jülich — Nuclear Physics Division, Jagiellonian University, Cracow
One of the key experiments of the physics program of WASA-at-COSY is the determination of the p-wave contributions to the Charge-Symmetry-Breaking amplitude in the reaction d d→4He π0 at 1.2 GeV/c beam momentum. As a first step towards realisation the measurement of the Charge Symmetry Conserving reaction d d→3He n π0 was choosen. For an overall theoretical analysis of CSB reactions in terms of Chiral Perturbation Theory this reaction channel is an important supplement. In addition, the background characteristics for 1.2 GeV/c deuterons on a deuteron pellet target using a large acceptance detector system like WASA-at-COSY are unknown and the small cross section of d d→4He n π0 (a few pb) requires a thorough preparation.
The status of the analysis of data taken during a dedicated commissioning run as well as from the production run end of 2007 will be presented.
Supported by FZ Jülich and BMBF.