Polarised W+j production at the LHC: a study at NNLO QCD accuracy

Abstract

We study polarisation of W-bosons produced in association with one jet at the LHC. In particular, we provide all necessary theoretical ingredients for the precise extraction of polarisation fractions. To that end, we present new polarised predictions up to NNLO QCD accuracy employing the narrow-width approximation, in two phase spaces: inclusive and fiducial. We compare results in the fiducial phase space to a full off-shell computation as well as experimental data. Finally, we fit the polarisation fractions using shape templates and show that NNLO corrections significantly improve their determination.

arXiv commentcorrected typos, applied referee's comments, i.e reviewed the discussion of fits to data, etc; matches JHEP published version

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• Event Generators for High-Energy Physics Experiments
• Les Houches 2021: Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• NLO QCD corrections to polarised di-boson production in semi-leptonic final states
• Angular coefficients in W+j production at the LHC with high precision
• A detailed investigation of W+c-jet at the LHC
• Computational challenges for multi-loop collider phenomenology
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist