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NNLO QCD + NLO EW with MATRIX+OPENLOOPS:precise predictions for vector-boson pair production


Grazzini, Massimiliano; Kallweit, S; Lindert, Jonas M; Pozzorini, Stefano; Wiesemann, Marius (2019). NNLO QCD + NLO EW with MATRIX+OPENLOOPS:precise predictions for vector-boson pair production. arXiv.org 1912.00068, University of Zurich.

Abstract

We present the first combination of NNLO QCD and NLO EW corrections for vector-boson pair production at the LHC. We consider all final states with two, three and four chargedleptons, including resonant and non-resonant diagrams, spin correlations and off-shell effects. De-tailed predictions are discussed for three representative channels corresponding toW+W−,W±ZandZZproduction. Both QCD and EW corrections are very significant, and the details of theircombination can play a crucial role to achieve the level of precision demanded by experimental anal-yses. In this context we point out nontrivial issues that arise at large transverse momenta, where theEW corrections are strongly enhanced by Sudakov logarithms and the QCD corrections can featureso-called giantK-factors. Our calculations have been carried out in theMatrix+OpenLoopsframework and can be extended to the production of an arbitrary colour singlet in hadronic colli-sions, provided that the required two-loop QCD amplitudes are available. Combined NNLO QCDand NLO EW predictions for the full set of massive diboson processes will be made publicly avail-able in the next release ofMatrixand will be instrumental in advancing precision diboson studiesand new-physics searches at the LHC and future hadron colliders

Abstract

We present the first combination of NNLO QCD and NLO EW corrections for vector-boson pair production at the LHC. We consider all final states with two, three and four chargedleptons, including resonant and non-resonant diagrams, spin correlations and off-shell effects. De-tailed predictions are discussed for three representative channels corresponding toW+W−,W±ZandZZproduction. Both QCD and EW corrections are very significant, and the details of theircombination can play a crucial role to achieve the level of precision demanded by experimental anal-yses. In this context we point out nontrivial issues that arise at large transverse momenta, where theEW corrections are strongly enhanced by Sudakov logarithms and the QCD corrections can featureso-called giantK-factors. Our calculations have been carried out in theMatrix+OpenLoopsframework and can be extended to the production of an arbitrary colour singlet in hadronic colli-sions, provided that the required two-loop QCD amplitudes are available. Combined NNLO QCDand NLO EW predictions for the full set of massive diboson processes will be made publicly avail-able in the next release ofMatrixand will be instrumental in advancing precision diboson studiesand new-physics searches at the LHC and future hadron colliders

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Item Type:Working Paper
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2019
Deposited On:06 Jan 2020 15:46
Last Modified:05 Aug 2020 03:39
Series Name:arXiv.org
ISSN:2331-8422
OA Status:Green
Related URLs:https://arxiv.org/abs/1912.00068

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