Top-Quark Physics at the LHC

TL;DR

This paper reviews the extensive measurements of top-quark properties at the LHC, highlighting advancements in experimental precision and theoretical predictions that enable detailed tests of the Standard Model and searches for new physics.

Contribution

It provides a comprehensive summary of top-quark measurements from LHC Run 1, emphasizing improvements in experimental and theoretical accuracy compared to previous results.

Findings

Smaller uncertainties in top-quark measurements at LHC

Enhanced theoretical predictions up to NNLO in QCD

New opportunities for precision tests of the Standard Model

Abstract

The top quark is the heaviest of all known elementary particles. It was discovered in 1995 by the CDF and D0 experiments at the Tevatron. With the start of the LHC in 2009, an unprecedented wealth of measurements of the top quark's production mechanisms and properties have been performed by the ATLAS and CMS collaborations, most of these resulting in smaller uncertainties than those achieved previously. At the same time, huge progress was made on the theoretical side yielding significantly improved predictions up to next-to-next-to-leading order in perturbative QCD. Due to the vast amount of events containing top quarks, a variety of new measurements became feasible and opened a new window to precisions tests of the Standard Model and to contributions of new physics. In this review, originally written for a recent book on the results of LHC Run 1, top-quark measurements obtained so far from the LHC Run 1 are summarised and put in context with the current understanding of the Standard Model.