Abstract
A review of the recent HERA-II measurements from the H1 and ZEUS detectors on neutral-current and charged-current deep inelastic scattering of longitudinally polarized lepton beams with a proton up to a center-of-mass energy of 318 GeV are presented. Dependence of the cross sections on the polarization of the lepton beam is shown. The lepton charge asymmetry of the neutral current cross section is used to extract the structure function x F ˜ 3 . Electroweak couplings of the u and d quarks are determined from a combined QCD and electroweak analysis of the data. Results on searches for physics beyond the Standard Model are presented. No deviations from the theory is seen, from which limits are derived on the presence of four fermion contact interactions, heavy leptoquarks and on the quark radius.
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