München 2009 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 13: QCD (Theorie) 3 / Elektroschwache Physik (Theorie)
T 13.5: Vortrag
Mittwoch, 11. März 2009, 17:45–18:00, M109
Hadroproduction of W bosons in association with a jet: electroweak radiative corrections — Ansgar Denner1, Stefan Dittmaier2, Alexander Mück3, and •Tobias Kasprzik4 — 1Paul Scherrer Institut, Villigen, Schweiz — 2Max-Planck-Institut für Physik, München — 3Paul Scherrer Institut, Villigen, Schweiz — 4Max-Planck-Institut für Physik, München
Vector bosons are produced with large cross sections at hadron colliders. They are most useful for detector calibration and may also allow for a luminosity measurement. Moreover, they constitute one of the most important backgrounds for beyond the Standard Model searches. W-boson production at the Tevatron and the LHC also enables the most precise measurements of the W mass and width using distributions of the decay products and the hadronic recoil. Hence, fully differential, accurate theoretical predictions are mandatory. Within the Standard Model, we have computed the full electroweak radiative corrections at NLO to the production of a leptonically decaying intermediate W boson in association with a jet. The W resonance is consistently described using the complex-mass scheme, and all off-shell contribution are included. The calculation is fully differential and delivers the prediction of all relevant distributions using a realistic event definition. The NLO QCD corrections (mandatory for a reduction of the scale uncertainty) are also included in the same setup.