Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-08
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages LaTeX, 10 figures, Plenary talk at the International Europhysics Conference on High Energy Physics (EPS HEP 2001), Bu
Scientific paper
It is the aim of this talk to review our understanding of the high-energy limit of QCD, focussing, in particular, on recent theoretical developments. After a brief introduction, I will recall why the true high-energy limit of QCD scattering processes is genuinly non-perturbative and why it has so far not been possible to apply lattice methods to this type of physics. Given the experimental fact of slowly rising hadronic cross sections, we are thus faced with a fundamental problem comparable to that of confinement but without the promise of the lattice. During the last years, the experimental side of this field has largely been driven by the HERA accelerator, which has, naturally, also influenced recent theoretical work in high-energy QCD. I will therefore devote the second part of the talk to small-x deep inelastic scattering, in particular the physics of diffraction, and attempt to describe its impact on the wider field of non-perturbative high-energy QCD.
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