SPIN Physics at GSI

Polarized antiprotons produced by spin filtering with an internal polarized gas target provide access to a wealth of single-- and double--spin observables, thereby opening a window to physics uniquely accessible with the HESR at FAIR. This includes a first measurement of the transversity distribution of the valence quarks in the proton, a test of the predicted opposite sign of the Sivers--function, related to the quark distribution inside a transversely polarized nucleon, in Drell--Yan (DY) as compared to semi--inclusive DIS, and a first measurement of the moduli and the relative phase of the time--like electric and magnetic form factors G_{E,M} of the proton. In polarized and unpolarized proton--antiproton elastic scattering open questions like the contribution from the odd charge--symmetry Landshoff--mechanism at large |t| and spin--effects in the extraction of the forward scattering amplitude at low |t| can be addressed.Comment: 10 pages, 3 figures. Contribution to the Proceedings of the 16th International Spin Physics Symposium, Spin 2004, October 10-16, 2004, Trieste, Italy. This replacement takes into account a request of the conference organizers that for invited talks only a single author is allowed. Also upon request of the conference organizers, a footnote (c) was added, which explains that some of the material presented was developed only after the oral presentation at the conferenc

Measurement of the Spin--Dependence of the pbar p Interaction at the AD-Ring

An internal polarized hydrogen storage cell gas target is proposed for the AD--ring to determine for the first time the two total spin--dependent cross sections $\sigma_1$ and $\sigma_2$ at antiproton beam energies in the range from 50 to 200 MeV. The data will allow the definition of the optimum working parameters of a dedicated Antiproton Polarizer Ring (APR), which has recently been proposed by the PAX collaboration for the new Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt, Germany. The availability of an intense beam of polarized antiprotons will provide access to a wealth of single-- and double--spin observables, thereby opening a new window to QCD transverse spin physics. The physics program proposed by the PAX collaboration includes a first measurement of the transversity distribution of the valence quarks in the proton, a test of the predicted opposite sign of the Sivers--function, related to the quark distribution inside a transversely polarized nucleon, in Drell--Yan (DY) as compared to semi--inclusive Deep Inelastic Scattering, and a first measurement of the moduli and the relative phase of the time--like electric and magnetic form factors $G_{E,M}$ of the proton

Ergebnisbericht der Befragung von Teilnehmenden des Gasthörenden‐ und Seniorenstudiums (GHS) sowie von Regelstudierenden der Leibniz Universität Hannover zum Thema „Bildung im Alter“

Bericht über eine Fragebogenerhebung bei Seniorstudierenden und regulär Studierenden an den Universitäten Magdeburg und Hannover im Sommersemester 2014. Darstellung und Interpretation der Ergebnisse vor dem Hintergrund aktueller Studien und Literatur zum Thema Bildung im Alter