tops at NLO and NNLO

TL;DR

This paper reviews recent advances in higher order QCD corrections for top quark pair production, including NLO and NNLO calculations, Monte Carlo simulations, and soft-gluon resummation techniques.

Contribution

It presents new developments in NLO Monte Carlo simulations of $pp \to t\bar{t}b\bar{b}$ and discusses the progress in NNLO soft-gluon resummation for $pp \to t\bar{t}$.

Findings

Enhanced accuracy in top quark pair production modeling

Progress in NNLO soft-gluon resummation techniques

Implementation of NLO Monte Carlo simulations for complex processes

Abstract

We briefly review the recent progress in the study of higher order corrections to hadron scattering processes involving top quark pairs in the final state. In particular, we discuss the Monte-Carlo simulation of the $pp \to t \bar{t} b \bar{b}$ process at the next-to-leading order with the help of the {\tt Helac-NLO} system, and the status of the soft-gluon resummation program for $pp \to t \bar{t}$ near threshold at the next-to-next-to-leading order.