Rare top quark production in CMS

TL;DR

This paper summarizes CMS experiment results on rare top quark production processes, including associated Z boson or photon production and four top quark production, using extensive LHC data, with results aligning well with the standard model.

Contribution

It provides the most precise measurements and the first differential measurements of rare top quark production processes at the LHC.

Findings

Most precise inclusive cross sections measured

Stringent limits set on beyond standard model theories

First differential measurements of rare top processes

Abstract

Latest results from the CMS experiment at the LHC on top quark production in association with a Z boson or a photon, and the production of four top quarks, are summarized. Proton-proton collision data corresponding to an integrated luminosity of up to 138 fb$^{-1}$, collected at 13 TeV center-of-mass energy are used. Among the measured results, most precise inclusive cross sections, most stringent limits on models beyond the standard model and first differential measurements are presented. Overall, good agreement with standard model predictions is observed.