Article

# Next-to-leading order QCD corrections to Z boson pair production via vector-boson fusion

Physical Review D (Impact Factor: 4.69). 05/2006; DOI: 10.1103/PhysRevD.73.113006

Source: arXiv

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**ABSTRACT:**We present an implementation of electroweak W+W-jj production at hadron colliders in the POWHEG framework, a method that allows the interfacing of a next-to-leading order QCD calculation with parton shower Monte Carlo programs. We provide results for both, fully and semi-leptonic decay modes of the weak bosons, taking resonant and non-resonant contributions and spin correlations of the final-state particles into account. To illustrate the versatility of our implementation, we provide phenomenological results for two representative scenarios with a light and with a heavy Higgs boson, respectively, and in a kinematic regime of highly boosted gauge bosons. The impact of the parton shower is found to depend on the setup and the observable under investigation. In particular, distributions related to a central-jet veto are more sensitive to these effects. Therefore the impact of radiation by the parton shower on next-to-leading order predictions should be assessed carefully on a case-by-case basis.Journal of High Energy Physics 01/2013; 2013(4). · 5.62 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**We report on the calculation of W^{±}Zjj production with leptonic decays at hadron-hadron colliders at next-to-leading order in QCD. These processes are important both to test the quartic gauge couplings of the standard model and because they constitute relevant backgrounds to beyond standard model physics searches. Our results show that the next-to-leading order corrections reduce significantly the scale uncertainties and have a nontrivial phase space dependence.Physical Review Letters 08/2013; 111(5):052003. · 7.73 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**The most likely spin assignments of the recently discovered 126 GeV resonance are spin 0 or 2. In order to distinguish between the two, we construct an effective Lagrangian model that comprises interactions of a spin-2 electroweak singlet or triplet state with the Standard Model gauge bosons. Within this model, cross sections and differential distributions are calculated and implemented within the Monte Carlo program Vbfnlo, which simulates vector-boson-fusion processes at hadron colliders at next-to-leading order QCD accuracy. We study the phenomenology of spin-2 resonances produced in vector-boson-fusion processes at the LHC. Specifically, we consider light Higgs-like spin-2 resonances decaying into two photons and show how angular distributions allow us to distinguish between a Standard Model Higgs and a spin-2 resonance. We also investigate the characteristics of heavy spin-2 resonances that decay into two weak gauge bosons, leading to a four-lepton final state.Physical review D: Particles and fields 03/2013; 87(5).

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