# Measurements of the inclusive $\rm t\bar{t}$ production cross section at the ATLAS and CMS experiments

## TL;DR

This paper summarizes recent measurements of the inclusive top-antitop quark pair production cross section at the LHC by ATLAS and CMS, including new results at 13 TeV and observations in proton-lead collisions.

## Contribution

It presents the latest experimental results on $
m tar{t}$ production cross sections, including the first observation in proton-lead collisions and a new measurement at 13 TeV.

## Key findings

- First observation of $
m tar{t}$ in proton-lead collisions
- New $
m tar{t}$ cross section measurement at 13 TeV
- Cross section determined for fixed and variable top quark mass

## Abstract

The results of the most recent measurements of the inclusive $\mathrm{t\bar{t}}$ cross section performed by the ATLAS and CMS experiments at the CERN LHC are summarized. These include results obtained in proton-proton collisions at different centre-of-mass energies, and the first observation of $\mathrm{t\bar{t}}$ production in proton-lead collisions. A new result at $\sqrt{s} = 13~\mathrm{TeV}$ by the CMS Collaboration is presented for the first time at this conference. In this analysis, the total cross section is determined both for a fixed top quark mass value in the simulation of $m_{\mathrm{t}}^{\mathrm{MC}} = 172.5~\mathrm{GeV}$, and simultaneously with $m_{\mathrm{t}}^{\mathrm{MC}}$.