Büscher, M. (Editor)FZJ* ; Grzonka, D. (Editor)FZJ* ; Hanhart, C. (Editor)FZJ* ; Krewald, S. (Editor)FZJ* ; Maier, R. (Editor)FZJ* ; Meißner, U.-G. (Editor)FZJ* ; Ritman, J. (Editor)FZJ* ; Stockhorst, H. (Editor)FZJ* ; Ströher, H. (Editor)FZJ*

2011
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Report No.: Juel-4336

Abstract: 20 I 0 marks the first year of the second period of Program oriented Funding (PoF), the new scheme of providing resources within the Helmholtz Association of German Research Centers. In October a further milestone for the FAIR project was accomplished by signatures of the international agreement on its construction and the subsequent foundation of the FAIR GmbH. The Institut für Kernphysik (IKP) of Forschungszentrtum Jülich (FZJ) is heavily involved in FAIR as the consortiumleader for the construction ofthe High Energy Storage Ring (HESR) and a major contributor to the PANDA detector. In addition IKP is working on a method to produce beams of polarized antiprotons by spin filtering for a possible future FAIRIHESR-upgrade. In October, a Program Advisory Council, chaired by Stephan Paul (TU Munich), was held at IKP to advise IKP and FZJ management on the future plans and strategy of the institute. Besides the IKP program outlined for PoF-2 for COSY and FAIR, the committee strongly endorsed the PAX spin filtering project and the plans to investigate the possibilities of a search for an electric dipole moment (EDM) of proton and/or deuteron ($^{3}$He) at storage rings, which could lead to a future IKP facility. lt also recommended to renew the position of the IKP-4 director (R. Maier) after his retirement in 2014 as early as possible. The followillg experimental and theoretical highlights are worth mentioning: • The decay of the eta into two charged pions and a photon has been measured by the WASA-at-COSY collaboration. • Analyzing powers and cross sections for the reaction $\vec{p}$n $\rightarrow$ (pp)$_{s}$$\pi$$^{-}$ have been obtained at ANKE for a beam energy T$_{p}$ = 353 MeV. The results are in agreement with, but extend, existing data in literature. They allow one to determine the low-energyconstant d in the 4N$\pi$ constant interaction of Chiral Perturbation Theory with very small systematic errors. • The WASA collaboration has obtained new data on two-pion production in the proton-proton reaction at the invariant collision energy $\sqrt{s}$s = 2.46 GeV. The data are not compatible with a conventional double Delta excitation. The COSY-TOF collaboration took data on the reaction $\vec{p}$p $\rightarrow$ pKA and extracted the Kaon analysing power, completing a first step in the determination of the spin triplet proton-Lambda scattering length. • The strong-interaction parameters in pionic deuterium have been measured with unprecedented precision. • Theory has derived the pion-deuteron scattering length from a consistent treatment of both strong and electromagnetic few body effects. The systematic uncertainties of the pion nucleon coupling constant are now controlled, reslilting in g$^{2}_{c}$/4$\pi$ = 13.7 ± 0.2 (see cover).[...]

1. Experimentelle Hadronstruktur (IKP-1)