Charlotte Van Hulse charlotte Van Hulse
HERMES had taken a wealth of deep-inelastic scattering (DIS) data using the 27.6 GeV polarized lepton beam at HERA and various pure gas targets, both unpolarized and polarized, which opened the door to several unique results. Among them are the ﬁrst evidences for the naive-T-odd Sivers and Collins eﬀects but also the recent ﬁrst measurements of azimuthal modulations in the unpolarized semi-inclusive DIS cross section for charged kaons and pions, of beam-helicity asymmetries in exclusive leptoproduction of real photons using recoil-proton detection, and the high-precision data set on light-meson multiplicities. An overview of HERMES results will be given with emphasis on the exploration of the three-dimensional structure of the nucleon.
Gunar Schnell (HERMES)