The polarized Drell-Yan process at O(\alpha_s)

The results of a recent calculation of the QCD corrections to the polarized Drell-Yan process are summarized. Some implications for the production of vector bosons at RHIC are discussed.Comment: 4 pages, LaTeX, 3 figures included, uses aipproc.sty and epsf.tex; Talk presented at the 5th International Workshop on "Deep Inelastic Scattering and QCD" (DIS '97), Chicago, Illinois, USA, April 14-18, 199

Two-Loop Jet Physics: Status and Prospects

I review the recent theoretical progress towards the computation of jet observables at two loops in QCD.Comment: 5 pages, Talk presented at 9th International Workshop on ``Deep Inelastic Scattering and QCD'' (DIS 2001), April 2001, Bologna, Ital

Progress on two-loop non-propagator integrals

At variance with fully inclusive quantities, which have been computed already at the two- or three-loop level, most exclusive observables are still known only at one loop, as further progress was hampered up to very recently by the greater computational problems encountered in the study of multi-leg amplitudes beyond one loop. We discuss the progress made lately in the evaluation of two-loop multi-leg integrals, with particular emphasis on two-loop four-point functions.Comment: 9 pages, LaTeX, Invited talk at 5th International Symposium on Radiative Corrections (RADCOR-2000), Carmel CA, USA, 11--15 September, 200

Isolated Photons in Deep Inelastic Scattering

Photon radiation at large transverse momenta at colliders is a detailed probe of hard interaction dynamics. The isolated photon production cross section in deep inelastic scattering was measured recently by the ZEUS experiment, and found to be considerably larger than theoretical predictions obtained with widely used event generators. To investigate this discrepancy, we perform a dedicated parton-level calculation of this observable, including contributions from fragmentation and large-angle radiation. Our results are in good agreement with all aspects of the experimental measurement.Comment: 4 pages, 3 figure