Transverse-momentum resummation fo top-quark pair production at the LHC

TL;DR

This paper develops a method for resumming logarithmic QCD contributions in top-quark pair production at the LHC, improving the accuracy of transverse-momentum distribution predictions across different momentum ranges.

Contribution

It introduces a combined resummation and fixed-order approach for top-quark pair transverse-momentum, with detailed uncertainty analysis and comparison to experimental data.

Findings

Resummation improves predictions at small transverse momentum.

Results show good agreement with ATLAS and CMS data.

Perturbative uncertainties are systematically estimated.

Abstract

We consider transverse-momentum resummation for top-quark pair production in hadron collisions. At small transverse momenta of the top-quark pair, the logarithmically-enhanced QCD contributions are resummed to all orders up to next-to-leading logarithmic accuracy. At intermediate and large values of transverse momenta, the resummation is consistently combined with the complete result at fixed perturbative order. We present numerical results for the transverse-momentum distribution of top-quark pairs at LHC energies. We perform a detailed study of the scale dependence of the results to estimate their perturbative uncertainty. We comment on the comparison with ATLAS and CMS data.