Inclusive and differential cross-section measurements of tt[bar]Z production in pp collisions at √s = 13 TeV with the ATLAS detector, including EFT and spin-correlation interpretations
Measurements of both the inclusive and differential production cross sections of a top-quark-top-antiquark pair in association with a Z boson (tt̄Z) are presented. Final states with two, three or four isolated leptons (electrons or muons) are targeted. The measurements use the data recorded by the A...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
July 18, 2024
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| In: |
Journal of high energy physics
Year: 2024, Heft: 7, Pages: 1-107 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP07(2024)163 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1007/JHEP07(2024)163 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP07(2024)163 
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| Verfasserangaben: | The ATLAS collaboration |
MARC
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| 245 | 1 | 0 | |a Inclusive and differential cross-section measurements of tt[bar]Z production in pp collisions at √s = 13 TeV with the ATLAS detector, including EFT and spin-correlation interpretations |c The ATLAS collaboration |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 0 | |a t̄ |
| 246 | 3 | 3 | |a Inclusive and differential cross-section measurements of tt[bar]Z production in pp collisions at square root s = 13 TeV with the ATLAS detector, including EFT and spin-correlation interpretations |
| 264 | 1 | |c July 18, 2024 | |
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| 500 | |a The ATLAS Collaboration: G. Aad, L.M. Baltes, F. Bartels, M.M. Czurylo, F. Del Rio, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, M. Klassen, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser und weitere 2910 | ||
| 500 | |a Im Titel steht der zweite Buchstabe "t" mit einem Oberstrich | ||
| 500 | |a Gesehen am 14.10.2025 | ||
| 520 | |a Measurements of both the inclusive and differential production cross sections of a top-quark-top-antiquark pair in association with a Z boson (tt̄Z) are presented. Final states with two, three or four isolated leptons (electrons or muons) are targeted. The measurements use the data recorded by the ATLAS detector in pp collisions at √s = 13 TeV at the Large Hadron Collider during the years 2015–2018, corresponding to an integrated luminosity of 140 fb−1. The inclusive cross section is measured to be σtt̄Z = 0.86±0.04 (stat.)±0.04 (syst.) pb and found to be in agreement with the most advanced Standard Model predictions. The differential measurements are presented as a function of a number of observables that probe the kinematics of the tt̄Z system. Both the absolute and normalised differential cross-section measurements are performed at particle level and parton level for specific fiducial volumes, and are compared with NLO+NNLL theoretical predictions. The results are interpreted in the framework of Standard Model effective field theory and used to set limits on a large number of dimension-6 operators involving the top quark. The first measurement of spin correlations in tt̄Z events is presented: the results are in agreement with the Standard Model expectations, and the null hypothesis of no spin correlations is disfavoured with a significance of 1.8 standard deviations. | ||
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