Measurements of the top-quark properties in the production and decays of ttbar events at CMS and ATLAS

TL;DR

This paper reviews recent measurements of top-quark properties at ATLAS and CMS, including production asymmetries, spin correlations, and couplings, using full LHC data sets, all aligning with Standard Model predictions.

Contribution

It provides a comprehensive update on top-quark property measurements at the LHC, highlighting new results on asymmetries, spin, polarization, and associated production with bosons.

Findings

Measurements agree with Standard Model expectations

Updated results on top-quark asymmetries and spin correlations

First results on associated production with W, Z, and gamma

Abstract

Recent measurements of top-quark properties (excluding the top quark mass) at ATLAS and CMS are discussed. This includes latest updates of measurements of $t\bar{t}$ production asymmetries, spin correlations and $W$ helicity, as well as the polarization and anomalous couplings of the top quark. Furthermore results on the associate production of $W$, $Z$ and $\gamma$ with a $t\bar{t}$ pair are presented. All of these measurements employ the full data set at $\sqrt{s} = 7$ or 8 TeV corresponding to an integrated luminosity of $4.7/$fb or $19.7/$fb. The results of all these measurements agree well with their respective Standard Model expectation.