# Top-quark pair production at the LHC: Fully differential QCD predictions at NNLO

## TL;DR

This paper presents a new fully differential NNLO QCD calculation for top-quark pair production at the LHC, enabling precise predictions of various observables and comparison with experimental data.

## Contribution

It introduces a novel NNLO QCD computational framework using the $q_T$ subtraction method within the Matrix platform for top-quark pair production.

## Key findings

- NNLO predictions match well with CMS data
- Provides detailed differential distributions at 13 TeV
- Enhances precision in top-quark physics analyses

## Abstract

We report on a new fully differential calculation of the next-to-next-to-leading-order (NNLO) QCD radiative corrections to the production of top-quark pairs at hadron colliders. The calculation is performed by using the $q_T$ subtraction formalism to handle and cancel infrared singularities in real and virtual contributions. The computation is implemented in the Matrix framework, thereby allowing us to efficiently compute arbitrary infrared-safe observables for stable top quarks. We present NNLO predictions for several single- and double-differential kinematical distributions in $pp$ collisions at the centre-of-mass energy $\sqrt{s}=13$ TeV, and we compare them with recent LHC data by the CMS collaboration.