Journal of High Energy Physics (Feb 2022)

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

  • Mathieu Pellen,
  • Rene Poncelet,
  • Andrei Popescu

DOI
https://doi.org/10.1007/JHEP02(2022)160
Journal volume & issue
Vol. 2022, no. 2
pp. 1 – 28

Abstract

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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.

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