Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 53: Hadronenstruktur und -spektroskopie
HK 53.5: Vortrag
Freitag, 21. März 2014, 12:15–12:30, HZ 3
Investigation of the quasi-free reaction p+d→ d+η+psp close to threshold at ANKE — •Daniel Schroeer, Christopher Fritzsch, Alfons Khoukaz, Malte Mielke, Michael Papen-brock, and Alexander Taeschner for the ANKE collaboration — Institut für Kernphysik, Westfälische Wilhelms-Universität, 48149 Münster, Germany
Recent precision measurements on the interaction of η mesons with He nuclei have shown evidence for an unexpectedly strong final state interaction which could possibly lead to the formation of η-mesic nuclei. To further investigate this behaviour for different nuclei a measurement on the reaction p+d → d+η+psp has been performed at the ANKE experiment located at the COSY accelerator of the Forschungszentrum Jülich. Here the deuteron serves as an effective neutron target while the remaining proton acts in good approximation as a spectator particle.The chosen beam momenta (p1= 2.09 GeV/c and p2= 2.25 GeV/c) in combination with the Fermi motion of the nucleons inside of the deuteron allow to measure cross sections in an excess energy range from 0 MeV up to 100 MeV. Based on these information the dη scattering length adη will be measured which will shed new light on the interaction between η meson and nucleons. In addition the data obtained at higher excess energies will allow for further information about the role of nucleonic resonances on the η meson production. Recent results will be presented and discussed.
Supported by the COSY-FFE program.