Münster 2017 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 27: Poster
HK 27.2: Poster
Tuesday, March 28, 2017, 16:45–18:45, F Foyer
Studies in the production of η mesons in the reacation p+d→ d+η+psp at ANKE* — •Daniel Schröer, Christopher Fritzsch, and Alfons Khoukaz — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster
The production of η mesons in hadronic collisions is an intensively investigated topic. An unexpectedly strong interaction between η mesons and nuclei, which might lead to the formation of mesic nuclei, has been found. For further studis on the characteristics of this interaction the reaction p+d→ d+η+psp has been measured at the ANKE spectrometer at the COSY accelerator of the Forschungszentrum Jülich. With the deuteron as an effective neuteron target whereas the proton is treated as a spectator particle, the use of two different beam momenta (p1= 2.09 GeV/c and p2= 2.25 GeV/c) in combination with the Fermi motion inside the target deuteron allow to the determine total and differential cross sections in an excess energy range from threshold up to Q=90 MeV. With the gained knowledge of the total cross section, specifically at low Q values, it is possble to determine the scattering length adη of an s-wave final state interaction ansatz. The validity of the s-wave assumption is proven with the differential cross sections. Furthermore the data taken at higher excess energies enable to examine the role of nucleonic resonances in the production process of η mesons. Recent results will be presented and discussed.