Recent Results in Spin Physics at STAR and Belle, Dr. Anselm Vossen

Quantum Chromodynamics, the theory of the strong interaction, is firmly established in the perturbative regime, However there is no consistent description of hadronic physics and new experimental results will have to drive progress in this field. The Relativistic Heavy Ion Collider (RHIC) at BNL uses polarized proton collisions at energies up to sqrt(s)=500 GeV to access the proton structure and unravel the mechanisms behind the unexplained phenomena in transverse spin physics. In these efforts, we increasingly use correlations in final state hadrons that are sensitive to the inital quark spin and non-perturbative QCD effects. To use our results in global analysis, the strength of these correlations have to be known and we measure them in q\bar{q} prodution in e+e- annihilation at Belle. This talk will highlight recent results in transverse and longitudinal spin physics from the STAR experiment at RHIC and the measurement of light quark fragmentation functions at Belle. I will give an outlook on our planned physics program at STAR, Belle and its successor Belle II.