Speaker
Description
We provide state-of-the art SCETlib predictions for the $W$ and $Z/\gamma^*$ transverse-momentum ($q_T$) distributions at the LHC at complete three-loop order in resummed perturbation theory (N$^3$LL$'$) and matched to available fixed order. We compare our predictions to high-precision measurements by the ATLAS and CMS experiments. We pay particular attention to the estimation of theory uncertainties via profile scale variations in such a way that perturbative uncertainties due to PDF evolution, other perturbative resummation uncertainties, and nonperturbative uncertainties for $q_T\to 0$ are cleanly disentangled. We also study the dependence on PDFs and their parametric uncertainties, focussing on the region $q_T \leq 40$ GeV. In this region, the dominant resummed contributions are fully known to three loops while remaining fixed-order corrections are power suppressed. In principle, this allows for future extractions of PDFs at genuine three-loop order from high-precision measurements in this region.
| Submitted on behalf of a Collaboration? | No |
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