Large transverse momentum processes

A comprehensive survey of experimental and theoretical work on large transverse processes is presented. Exclusive data and single particle inclusive measurements are summarized and some discussion of multiparticle inclusive data is included. Many of the predictions of nonparton models are reviewed including the geometrical, statistical, eikonal and bootstrap approaches. A more detailed discussion is given of the structure of models based on the hard scattering of constituents. The predictions for hadronic and electromagnetic processes based on quark counting rules and the constituent interchange model (CIM) are summarized. Numerous comparisons with experiment are presented and the framework for the comparison with new experimental data is indicated. Recent theoretical progress in the problem of relating short distance structure of hadrons with the asymptotic behavior of form factors and fixed angle amplitudes is also reviewed. A brief discussion of the possible influence of new hadronic degrees of freedom on large-psub(T) phenomena is included. Finally, an attempt is made to anticipate the type of experiments which will prove decisive in the understanding of this subject. (Auth.)