https://service.tib.eu/vdataset/inspirehep_2bb1d880-23a2-455b-82b8-bc547f884d5d Georges Aad Brad Abbott Dale Charles Abbott Adam Abed Abud Kira Abeling Deshan Kavishka Abhayasinghe Syed Haider Abidi Ossama Abouzeid Nicola Abraham Halina Abramowicz Not defined 2025 Georges Aad 17/11/2025 17/11/2025 Dataset 0 kb The $t\bar{t}$ production cross-section is measured in the lepton+jets channel using proton-proton collision data at a centre-of-mass energy of $\sqrt{s}=13$ TeV collected with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 139 fb$^{-1}$. Events with exactly one charged lepton and four or more jets in the final state, with at least one jet containing $b$-hadrons, are used to determine the $t\bar{t}$ production cross-section through a profile-likelihood fit. The inclusive cross-section is measured to be ${\sigma_{\text{inc}} = 830 \pm 0.4 \text{(stat.)} \pm 36 \text{(syst.)}\pm 14 \text{(lumi.)} \mathrm{pb}}$ with a relative uncertainty of 4.6 %. The result is consistent with theoretical calculations at next-to-next-to-leading order in perturbative QCD.