CERN Accelerating science

ATLAS Note
Report number	ATL-PHYS-PROC-2024-104
Title	Inclusive top cross sections in ATLAS
Author(s)	Chen, Charlie (University of Victoria (CA))
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2024
Imprint	16 Nov 2024
Number of pages	8
In:	17th International Workshop on Top Quark Physics, Saint Malo, France, 22 - 27 Sep 2024
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	Top quark ; cross-sections ; measurements ; t-channel ; tW ; ttbar ; single-top ; TOP
Abstract	The ATLAS collaboration at the LHC has published inclusive cross-section measurements for the single-top and \ttbar production modes at center-of-mass energies of $\sqrt{s} = 5.02, 8.16$, $13$, and $13.6$ TeV. Single-top measurements are conducted in the $t$-channel and $tW$ channel. In addition to the nominal cross-section measurements, various measurements of other interesting observables such as the $V_{tb}$ element of the Cabibbo Kobayashi Maskawa (CKM) quark-mixing matrix, the ratio of the inclusive cross-sections between $tq$ and $t\overline{q}$, the ratio of inclusive cross-sections between $t\overline{t}$ and $Z\rightarrow \ell\ell$, and the nuclear modification factor (defined as the ratio of the inclusive $t\overline{t}$ cross section in heavy-ion collisions to the inclusive $t\overline{t}$ cross-section in $pp$ collisions) are also reported. These results are compared to their corresponding SM predictions, calculated at (N)NLO in QCD. All results are in good agreement with SM predictions.