A positive-weight next-to-leading order simulation of weak boson pair production

Abstract

In this article we describe simulations of ZZ, WZ and WW production based on the positive weight next-to-leading-order matching scheme, Powheg, in the Herwig++ event generator. Building on earlier efforts within the Herwig++ framework, the simulation includes a full description of truncated showering effects, required to correctly model soft, wide angle, emissions in angular-ordered parton showers. We utilize simple relations among each of the diboson cross sections, holding to order alpha_S, in constructing the simulation. Spin correlation effects are also included in the decays of the vector bosons at the tree order. A large part of this work is concerned with a full and thorough validation of the simulations through comparisons with alternative methods and calculations.

arXiv comment32 pages, 9 figures; v2 references added; v3 commented on singly resonant contributions and damping factors

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• Practical improvements and merging of POWHEG simulations for vector boson production
• Vector-Boson Scattering at the LHC: unravelling the Electroweak sector
• Threshold Resummed and Approximate NNLO results for W+W- Pair Production at the LHC
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• Next-to-Leading-Order Monte Carlo Simulation of Diphoton Production in Hadronic Collisions
• Next-to-leading-order electroweak corrections to the production of three charged leptons plus missing energy at the LHC
• $W^{+}{W}^{-}$ production at NNLO+PS with MiNNLO${}_{\mathrm{PS}}$
• New Physics backgrounds to the H -> WW search at the LHC?
• Investigation of Monte Carlo Uncertainties on Higgs Boson searches using Jet Substructure
• Merging WW and WW+jet with MINLO
• Fixed-order and merged parton-shower predictions for WW and WWj production at the LHC including NLO QCD and EW corrections
• Studying the sensitivity of monotop probes to compressed supersymmetric scenarios at the LHC
• Four lepton production and the accuracy of QED FSR
• NNLO QCD corrections to $pp\to {\gamma }^{\ast }{\gamma }^{\ast }$ in the large $N_F$ limit
• Monte Carlo Simulation of Hard Radiation in Decays in Beyond the Standard Model Physics in Herwig++
• KrkNLO matching for colour-singlet processes
• A Positive-Weight Next-to-Leading-Order Monte Carlo Simulation of Deep Inelastic Scattering and Higgs Boson Production via Vector Boson Fusion in Herwig++
• NLO tools and the background to $H\to WW$