Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 46: Theorie: QCD

T 46.9: Talk

Tuesday, March 26, 2019, 18:00–18:15, ST 8

Parton-shower effects in electroweak W⁺Zjj production at the next-to-leading order of QCD — Barbara Jäger¹, Alexander Karlberg², and •Johannes Scheller¹ — ¹Institute for Theoretical Physics, University of Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany — ²Physics Institute, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland

We present an implementation of W⁺Zjj production via vector-boson fusion in the POWHEG BOX, a public tool for the matching of next-to-leading order QCD calculations with multi-purpose parton-shower generators. We provide phenomenological results for electroweak W⁺Zjj production with fully leptonic decays at the LHC in realistic setups and discuss theoretical uncertainties associated with the simulation. We find that beyond the leading-order approximation the dependence on the unphysical factorization and renormalization scales is mild. The two tagging jets are furthermore very stable against parton-shower effects. However, considerable sensitivities to the shower Monte-Carlo program used are observed for central-jet veto observables.