Inclusive top cross sections in ATLAS

TL;DR

This paper reports on ATLAS measurements of inclusive top quark production cross sections at various energies, including related observables, all consistent with Standard Model predictions.

Contribution

It provides comprehensive measurements of top quark production and related observables at multiple energies, enhancing the understanding of top physics and testing the Standard Model.

Findings

Measurements agree with SM predictions within uncertainties.

Provides data on CKM matrix element V_tb.

Includes nuclear modification factor in heavy-ion collisions.

Abstract

The ATLAS collaboration at the LHC has published inclusive cross-section measurements for the single-top and $t\overline{t}$ 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.