Theoretical aspects of high-Q²deep inelastic scattering

Abstract

Abstract. We present an overview of the theory of high-Q 2 deep inelastic scattering. We focus in particular on the theoretical uncertainties in the predictions for neutral and charged current cross sections obtained by extrapolating from lower Q 2 .

HERA physics beyond the standard model

“…On the other hand, the cross sections for hard lepton-quark and lepton-gluon subprocesses have to be known also at least to NLO. The theoretical tools needed to solve the first part of the task are well-established and the precision of parton distribution functions depends mainly on the quality of experimental data [3]. On the other hand, NLO calculations for hard subprocesses, while continuously improving, have not yet reached a completely satisfactory status [4].…”