Climbing to the Top of the ATLAS 13 TeV data
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866910914580578304 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | 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 a higher 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 multiple 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 cross-section measurements for several of these processes have reached 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_10674 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Climbing to the Top of the ATLAS 13 TeV data ATLAS Collaboration High Energy Physics - Experiment 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 a higher 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 multiple 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 cross-section measurements for several of these processes have reached 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. |
| title | Climbing to the Top of the ATLAS 13 TeV data |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2404.10674 |