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HK: Fachverband Physik der Hadronen und Kerne
HK 45: Elektromagnetische und Hadronische Sonden
HK 45.3: Vortrag
Donnerstag, 15. März 2007, 14:45–15:00, A
Investigation of the 3He η Final State in dp-Reactions at ANKE — •Tobias Rausmann, Alfons Khoukaz, Timo Mersmann, Malte Mielke, and Michael Papenbrock for the ANKE collaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster
The existence of η-mesic nuclei is still an open issue of research. To investigate the possibility of the formation of such bound systems, production measurements with one η meson and one light nucleus in the final state are of great interest. By studying total and differential cross sections at low excess energies, information about the final state interaction and therefore about the scattering length of the η-nucleus system can be obtained. The latter is closely related to the properties of such a possible bound state and has to be determined with high accuracy. Therefore, the reaction d+p→3He+η has been investigated at the ANKE spectrometer with high precision using a continuously ramped accelerator beam at excess energies ranging from below threshold up to Q=+12 MeV. Due to the full geometrical acceptance of the ANKE spectrometer high statistic data for this reaction have been obtained. Additionally, data at excess energies of Q = 20, 40 and 60 MeV have been recorded in order to determine total cross sections and to investigate contributions from higher partial waves. Results on the total and differential cross sections as well as consequences for the scattering length determination method will be presented and discussed.
*supported by FZ-Juelich FFE grants