Jet Observables in Theory and Reality

Abstract

I discuss the one jet inclusive jet cross section, d sigma /dE_T emphasizing the concept of infrared safety and the cone definition of jets. Then I estimate the size of power corrections to the jet cross section, which become important at smaller values of E_T.

Comments: Talk at 1997 Rencontre de Moriond, QCD Session. 7 pages with 4 figures