Bonn 2010 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 10: QCD (Theorie) I
T 10.1: Vortrag
Montag, 15. März 2010, 16:45–17:00, HG XVI
NLO QCD corrections to VV+jet at hadron colliders — Stefan Dittmaier1,2, •Stefan Kallweit2,3, and Peter Uwer4 — 1Albert-Ludwigs-Universität Freiburg — 2Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) — 3Paul Scherrer Institut, Würenlingen und Villigen, Schweiz — 4Institut für Physik, Humboldt-Universität zu Berlin
We report on the calculation of the next-to-leading order QCD corrections to the production of massive gauge-boson pairs in association with a hard jet at the Tevatron and the LHC. Leptonic decays of the gauge bosons are included by applying an improved version of the narrow-width approximation that treats them as on-shell particles, but keeps the information on their spins. The QCD corrections stabilize the leading-order prediction for the cross sections with respect to scale variations. However, the scale dependence of the next-to-leading order results for the LHC is only reduced considerably if a veto against the emission of a second hard jet is applied. In general, the corrections do not simply rescale the differential leading-order cross sections. In particular, their shapes are distorted if an additional energy scale is involved.