Summary, DIS 97

Some of the experimental and theoretical results discussed at the Fifth International Workshop on Deep Inelastic Scattering and QCD are reviewed.Comment: 33 pages, LaTeX, 14 eps figures. Summary talk, to appear in Proceedings of the Fifth International Workshop on Deep Inelastic Scattering and QC

Fixed Angle Scattering and the Transverse Structure of Hadrons

The perturbative treatment of high-energy fixed-angle hadron-hadron exclusive scattering is reviewed and related to the transverse structure of the proton and other hadrons.Comment: Talk presented at the 4th Workshop on Exclusive Reactions at High Momentum Transfer, May 18-21, 2010, Thomas Jefferson National Accelerator Facility, Newport News, Virginia. Reformatted version with additional reference

Quantifying Comparisons of Threshold Resummations

We explore similarities and differences between widely-used threshold resummation formalisms, employing electroweak boson production as an instructive example. Resummations based on both full QCD and soft-collinear effective theory (SCET) share common underlying factorizations and resulting evolution equations. The formalisms differ primarily in their choices of boundary conditions for evolution, in moment space for many treatments based on full QCD, and in momentum space for treatments based on soft-collinear effective theory. At the level of factorized hadronic cross sections, these choices lead to quite different expressions. Nevertheless, we can identify a natural expansion for parton luminosity functions, in which SCET and full QCD resummations agree for the first term, and for which subsequent terms provide differences that are small in most cases. We also clarify the roles of the non-leading resummation constants in the two formalisms, and observe a relationship of the QCD resummation function $D(\alpha_s)$ to the web expansion.Comment: 36 pages, 8 figure

Threshold Resummation for QCD Hard Scattering

We describe the resummation of singular distributions at partonic threshold in heavy quark production, generalizing results for Drell-Yan and other electroweak hard-scattering processes.Comment: 4 pages, to appear in Proceedings of the Fifth International Workshop on Deep Inelastic Scattering and QC