Jet structure and infrared sensitive quantities in perturbative QCD

Abstract

Infrared sensitive measurements in hard scattering include x- and p⊥-distributions at the phase space boundary (where soft emision is depressed) and jet multiplicity distributions (where it is emphasized). We review QCD results for these quantities and the corresponding infrared resummation techniques. Particular emphasis is put on the structure of the jet final state and its phenomenological consequences.