Transverse-momentum dependent semi-inclusive deep-inelastic scattering at HERMES

Transverse-target-spin asymmetries as well as longitudinal beam-helicity asymmetries measured in semi-inclusive deep-inelastic scattering for charged pions and kaons and for protons and antiprotons are presented. They are extracted from data collected by the HERMES experiment using a 27.6 GeV longitudinally polarized electron and positron beam and, respectively, a transversely polarized hydrogen target and unpolarized hydrogen and deuterium targets. The measurements serve the determination of parton distribution functions describing the distribution of partons as a function of their longitudinal and transverse momenta in a transversely polarized proton as well as the quark-gluon-quark correlations inside the nucleon