W-boson angular coefficients at LHC at high precision

TL;DR

This paper provides high-precision theoretical predictions for W-boson angular coefficients at the LHC, combining NNLO QCD and NLO EW calculations to improve accuracy in modeling spin correlations at high transverse momentum.

Contribution

It presents the first combined NNLO QCD and NLO EW predictions for W-boson angular coefficients, reducing theoretical uncertainties in high transverse momentum regions.

Findings

Up to 10% corrections in certain phase space regions.

Significant reduction in scale uncertainties compared to NLO QCD.

Enhanced precision in modeling W-boson spin correlations.

Abstract

We present state-of-the-art high-precision theory predictions for the dominant angular coefficients parametrizing the spin-correlations in the production and decay of a W-boson produced at transverse momentum larger than 30 GeV. The computation at NNLO QCD and NLO EW accuracy are combined to obtain differential distributions in the W-boson transverse momentum and rapidity. The found results show up to 10 % corrections in certain regions of phase space, while the scale bands are significantly reduced as compared to NLO QCD.