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T: Fachverband Teilchenphysik

T 40: Top Quark (Theorie) 2

T 40.1: Vortrag

Dienstag, 28. März 2017, 11:00–11:15, VSH 05

Off-shell effects for ttj in the dilepton channel — •Manfred Kraus — Humboldt Universitaet zu Berlin, Berlin, Germany

We present results for the top-quark pair production in association with one hard jet including leptonic decays of the top quarks. The NLO QCD calculation for the LHC Run II energy of 13 TeV includes resonant as well as continuum production and all interference and off-shell contributions from top-quarks, W and Z bosons. We present a detailed comparison of uncertainties for integrated and differential cross sections as obtained by an independent variation of the renormalization and factorization scales for fixed and dynamical choices of the scale. Finally, also the impact of PDF uncertainties are addressed. We also briefly discuss the influence of off-shell effects on the extraction of the top-quark mass parameter.