High-Q Deep Inelastic Scattering at HERA

High Q NC and CC cross sections as measured at HERA can give information on two distinct areas of current interest. Firstly, supposing that all the electroweak parameters are well known, these cross-sections may be used to give information on parton distribution functions (PDFs) in the new kinematic regime at high x and high Q. Secondly, supposing that PDFs are well known after evolution in Q from the kinematic regime where they are already measured, these cross-sections may be used to give information on electroweak parameters in a process where the exchanged boson is ‘spacelike’ rather than ‘timelike’. WG1 addressed itself to clarifying the limits of our present and possible future knowledge on both these points.