Climbing to the Top of the ATLAS 13 TeV data
Abstract
The large amount of data recorded with the ATLAS detector at the Large Hadron Collider, corresponding to 140 fb$^{-1}$ of $pp$ collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV, has brought our knowledge of the top quark to the next level. The measurement of the top$-$antitop quark pair-production cross-section has reached a precision of 1.8% and the cross-section was measured differentially up to several TeV in several observables including the top-quark transverse momentum and top-quark-pair invariant mass. Single-top-quark production was studied in all production modes. Rare production processes where the top quark is associated with a vector boson, and four-top-quark production, have become accessible and precision measurements of several of these processes have reached cross-section uncertainties of around 10% or smaller. Innovative measurements of the top-quark mass and properties have also emerged, including the observation of quantum entanglement in the top-quark sector and tests of lepton-flavour universality using top-quark decays. Searches for flavour-changing neutral currents in the top-quark sector have been significantly improved, reaching branching-ratio exclusion limits ranging from $10^{-3}$ to $10^{-5}$. Many of these analyses have been used to set limits on Wilson coefficients within the effective field theory framework.
- Publication:
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arXiv e-prints
- Pub Date:
- April 2024
- DOI:
- 10.48550/arXiv.2404.10674
- arXiv:
- arXiv:2404.10674
- Bibcode:
- 2024arXiv240410674A
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 88 pages in total, author list starting page 71, 16 figures, 3 tables, submitted to Physics Report. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2023-19