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t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects

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arxiv 1208.2665 v1 pith:HFBX5MPR submitted 2012-08-13 hep-ph

classification hep-ph
keywords tbarshoweraccuracyhadronizationhadroproductionmatchingpartonallows
verification ladder T0 review T1 audit T2 compute T3 formal
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We present theoretical predictions for the hadroproduction of t tbar W+, t tbar W- and t tbar Z at LHC as obtained by matching numerical computations at NLO accuracy in QCD with Shower Monte Carlo programs. The calculation is performed by PowHel, relying on the POWHEG-BOX framework, that allows for the matching between the fixed order computation, with input of matrix elements produced by the HELAC-NLO collection of event generators, and the Parton Shower evolution, followed by hadronization and hadron decays as described by PYTHIA and HERWIG. We focus on the dilepton and trilepton decay channels, studied recently by the CMS Collaboration.

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  1. Multi-scale improved predictions for $\boldsymbol{pp \to t\bar{t}W^+ +X}$

    hep-ph 2026-07 accept novelty 5.5 of 10

    MiNLO yields NLO predictions for full off-shell pp o ttW+(j/jj) that agree with fixed-order results while reducing scale dependence for multi-jet samples, and merging improves the inclusive ttW+ description.

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