Next-to-leading order predictions for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>W</mml:mi><mml:mi>W</mml:mi><mml:mo>+</mml:mo><mml:mtext mathvariant="bold">jet</mml:mtext></mml:mrow></mml:math>production

We present novel predictions for the production of W + W − pairs in hadron collisions that are next-to-next-to-leading order accurate and consistently matched to a parton shower (NNLOPS). All diagrams that lead to the process pp → e −ν e µ + ν µ + X are taken into account, thereby including spin correlations and off-shell effects. For the first time full NNLOPS accuracy is achieved for a 2 → 4 process. We find good agreement, at the 1σ level, with the W + W − rates measured by ATLAS and CMS. The importance of NNLOPS predictions is evident from differential distributions sensitive to soft-gluon effects and from the large impact (10% and more) of including next-to-next-to-leading order corrections on top of MiNLO. We define a charge asymmetry for the W bosons and the leptons in W + W − production at the LHC, which is sensitive to the W polarizations and hence can be used as a probe of new physics.

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“…W + W − production in association with one, two, and three jets has been computed at NLO QCD in Refs. [40][41][42][43], Refs. [44,45], and Ref.…”

Section: Contentsmentioning

confidence: 99%

NNLOPS accurate predictions for W+W− production

Ré

Wiesemann

Zanderighi

2018

J. High Energ. Phys.

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“…[35,36], and have been used to compute the NLO QCD corrections to gg → W + W − [37], including all partonic processes with external gluons, while the ones with external quarks are still unknown to date. Calculations at NLO QCD for W + W − production in association with one [38][39][40][41] and two [42,43] jets are also important ingredients of inclusive W + W − production at NNLO QCD and beyond. The merging of NLO QCD predictions for pp → W + W − + 0, 1 jets 1 has been presented in ref.…”

Section: Jhep08(2016)140mentioning

confidence: 99%

W + W − production at the LHC: fiducial cross sections and distributions in NNLO QCD

Grazzini

Kallweit

Pozzorini

et al. 2016

J. High Energ. Phys.

128

176

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We consider QCD radiative corrections to W + W − production at the LHC and present the first fully differential predictions for this process at next-to-next-to-leading order (NNLO) in perturbation theory. Our computation consistently includes the leptonic decays of the W bosons, taking into account spin correlations, off-shell effects and nonresonant contributions. Detailed predictions are presented for the different-flavour channel pp → µ + e − ν µνe + X at √ s = 8 and 13 TeV. In particular, we discuss fiducial cross sections and distributions in the presence of standard selection cuts used in experimental W + W − and H → W + W − analyses at the LHC. The inclusive W + W − cross section receives large NNLO corrections, and, due to the presence of a jet veto, typical fiducial cuts have a sizeable influence on the behaviour of the perturbative expansion. The availability of differential NNLO predictions, both for inclusive and fiducial observables, will play an important role in the rich physics programme that is based on precision studies of W + W − signatures at the LHC.

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“…In the ratios different PDF replicas are correlated across processes and the resulting errors on the respective ratio are combined in quadrature son samples that include at least one extra jet at matrixelement level. At the TeV scale, the EW corrections to pp → V V + jet can become quite large [69,70] and should ultimately be included, together with the corresponding QCD corrections [71][72][73][74][75][76][77][78].…”

Section: Real-boson Emissionmentioning

confidence: 99%

Precise predictions for $$V+$$ V + jets dark matter backgrounds

et al. 2017

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High-energy jets recoiling against missing transverse energy (MET) are powerful probes of dark matter at the LHC. Searches based on large MET signatures require a precise control of the Z (νν)+ jet background in the signal region. This can be achieved by taking accurate data in control regions dominated by Z ( + − )+ jet, W ( ν)+ jet and γ + jet production, and extrapolating to the Z (νν)+ jet background by means of precise theoretical predictions. In this context, recent advances in perturbative calculations open the door to significant sensitivity improvements in dark matter searches. In this spirit, we present a combination of state-of-the-art calculations for all relevant V + jets processes, including throughout NNLO QCD corrections and NLO electroweak corrections supplemented by Sudakov logarithms at two loops. Predictions at parton level are provided together with detailed recommendations for their usage in experimental analyses based on the reweighting of Monte Carlo samples. Particular attention is devoted to the estimate of theoretical uncertainties in the framework of dark matter searches, where subtle aspects such as correlations across different V + jet processes play a key role. The anticipated theoretical uncertainty in the Z (νν)+ jet background is at the few percent level up to the TeV range.G. P. Salam: On leave from CNRS, UMR 7589, LPTHE, F-75005,

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Next-to-leading order predictions forWW+jetproduction

Cited by 14 publications

References 63 publications

NNLOPS accurate predictions for W+W− production

NNLOPS accurate predictions for W+W− production

W + W − production at the LHC: fiducial cross sections and distributions in NNLO QCD

Precise predictions for $$V+$$ V + jets dark matter backgrounds

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