Next-to-next-to-leading order event generation for top-quark pair production

TL;DR

This paper presents the first matched simulation of top-quark pair production at next-to-next-to-leading order in QCD, combining high-precision calculations with parton-shower models for improved LHC event analysis.

Contribution

It introduces a novel matched computation method for top-quark pair production at NNLO in QCD with all-order radiative corrections, advancing simulation accuracy.

Findings

Enhanced simulation accuracy for top-quark pairs at LHC

First NNLO matched computation with parton-shower integration

Improved tools for studying hadronic processes with color charges

Abstract

The production of top-quark pairs in hadronic collisions is among the most important reactions in modern particle physics phenomenology and constitutes an instrumental avenue to study the properties of the heaviest quark observed in nature. The analysis of this process at the Large Hadron Collider relies heavily on Monte Carlo simulations of the final state events, whose accuracy is challenged by the outstanding precision of experimental measurements. In this letter we present the first matched computation of top-quark pair production at next-to-next-to-leading order in QCD with all-order radiative corrections as implemented via parton-shower simulations. Besides its intrinsic relevance for LHC phenomenology, this work also establishes an important step towards the simulation of other hadronic processes with colour charges in the final state.