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

Understand

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.