Experimental review of diffractive phenomena

Abstract

A review is given of the measurements of the hard diffractive interactions in recent years from two high-energy colliders, the HERA $ep$ collider and the Tevatron $p\bar{p}$ collider. The structure of the diffractive exchange in terms of partons, the factorisation properties and the ratio of diffractive to non-diffractive cross sections are discussed.Comment: Contribution to the proceedings of BARYONS 2004. LaTeX 10 page