Power Corrections in Deep Inelastic Event Shape Variables

Results are presented for the leading power-suppressed (1/Q) contributions to shape variables in deep inelastic lepton scattering. These are then combined with available leading order perturbative estimates.Comment: 6 pages,Latex2e, 2 figures. To be published in the proceedings of the 5th International workshop on Deep Inelastic Scattering, Chicago, April 199

Power Corrections in QCD

This article provides a review of progress made in understanding inverse power law corrections 1/Q^p where Q is the hard scale for a given QCD observable. Special emphasis is given to comparisons of theory with HERA results.Comment: 10 pages, 5 figures. Contribution submitted to Ringberg workshop on HERA physics, Ringberg Castle, June 200

Recent progress in QCD calculations for e^+e^- annihilation and hadron collisions

We provide a brief summary of recent developments in QCD calculations in and beyond fixed-order perturbation theory, for observables in $e^{+}e^{-}$ annihilation as well as hadron collisions.Comment: 9 pages, invited review talk at the meeting LC 10- "New physics:complementarities between direct and indirect searches", Frascati, Nov 30-Dec 3, 201

Power corrections to the differential Drell-Yan cross section

We estimate the power corrections (infrared renormalon contributions) to the coefficient functions for the differential Drell-Yan cross-section $d^2\sigma/dQ^2dy$, where $Q^2$ is the mass squared and $y$ the rapidity of the produced lepton pair. We employ the dispersive method based on the analysis of one-loop Feynman graphs containing a massive gluon.Comment: 11 pages, 1 figure, LaTe