Freiburg 2008 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 12: Elektroschwache Physik (Theorie)
T 12.1: Vortrag
Dienstag, 4. März 2008, 16:45–17:00, KGI-HS 1132
Radiative corrections to W-boson hadroproduction: higher-order electroweak and supersymmetric effects — •Silja Brensing1, Stefan Dittmaier2,3, Michael Krämer1, and Alexander Mück1,4 — 1Institut für Theoretische Physik, RWTH Aachen, Germany — 2Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany — 3Faculty of Physics, University of Vienna, Austria — 4Paul Scherrer Institut, Würenlingen und Villigen, Switzerland
The high accuracy envisaged for future measurements of W-boson production at hadron colliders has to be matched by precise theoretical predictions. We study the impact of electroweak radiative corrections on W-boson production cross sections and differential distributions at the Tevatron and at the LHC. In particular, we include photon-induced processes, which contribute at order α, and leading radiative corrections beyond order α in the high-energy Sudakov regime and from multi-photon final-state radiation. We furthermore present the calculation of the complete supersymmetric next-to-leading-order electroweak and QCD corrections to W-boson hadroproduction within the MSSM. The supersymmetric corrections turn out to be negligible in the vicinity of the W resonance in general, reaching the percent level only at high lepton transverse momentum and for specific choices of the supersymmetric parameters.