Measurement of the tt‾ cross section and its ratio to the Z production cross section using pp collisions at √s=13.6 TeV with the ATLAS detector

Sonia Kabana; Theodota Lagouri; ATLAS Collaboration

doi:10.1016/J.PHYSLETB.2023.138376

Measurement of the tt‾ cross section and its ratio to the Z production cross section using pp collisions at √s=13.6 TeV with the ATLAS detector

Título traducido de la contribución: Medición de la sección transversal tt‾ y su relación con la sección transversal de producción Z utilizando colisiones pp a √s=13,6 TeV con el detector ATLAS

Sonia Kabana
, Theodota Lagouri
, ATLAS Collaboration

Instituto de Alta Investigación

Universidad de Tarapacá

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

12 Citas (Scopus)

Resumen

La sección eficaz de producción del par de quarks top, σtt¯, y su cociente con la sección eficaz de producción del bosón Z se han medido en colisiones protón-protón a s = 13,6 TeV, utilizando 29 fb−1 de datos recopilados en 2022 con el experimento ATLAS en el Gran Colisionador de Hadrones. Utilizando eventos con un par electrón-muón de carga opuesta y chorros marcados con b, y asumiendo desintegraciones del Modelo Estándar, la sección eficaz de producción del par de quarks top se mide como σtt¯ = 850 ± 3 (estadístico) ± 18 (sistémico) ± 20 (lumimétrico) pb. También se mide el cociente entre las secciones eficaces de producción de tt¯ y del bosón Z, donde la contribución del bosón Z se determina para eventos e+e− y μ+μ− inclusivos en un espacio de fase fiducial. La incertidumbre relativa de la relación se reduce en comparación con la sección eficaz tt¯ gracias a la cancelación de varias incertidumbres sistemáticas. El resultado de la relación, Rtt¯/Z = 1,145 ± 0,003 (estadístico) ± 0,021 (sistémico) ± 0,002 (lumimétrico), es consistente con la predicción del Modelo Estándar utilizando el conjunto PDF4LHC21.

Título traducido de la contribución	Medición de la sección transversal tt‾ y su relación con la sección transversal de producción Z utilizando colisiones pp a √s=13,6 TeV con el detector ATLAS
Idioma original	Inglés
Número de artículo	138376
Páginas (desde-hasta)	1-25
Número de páginas	25
Publicación	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volumen	848
DOI	https://doi.org/10.1016/J.PHYSLETB.2023.138376
Estado	Publicada - ene. 2024

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title = "Measurement of the tt‾ cross section and its ratio to the Z production cross section using pp collisions at √s=13.6 TeV with the ATLAS detector",

abstract = "The inclusive top-quark-pair production cross section σtt¯ and its ratio to the Z-boson production cross section have been measured in proton–proton collisions at s=13.6 TeV, using 29 fb−1 of data collected in 2022 with the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge electron-muon pair and b-tagged jets, and assuming Standard Model decays, the top-quark-pair production cross section is measured to be σtt¯=850±3(stat.)±18(syst.)±20(lumi.) pb. The ratio of the tt¯ and the Z-boson production cross sections is also measured, where the Z-boson contribution is determined for inclusive e+e− and μ+μ− events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the tt¯ cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, Rtt¯/Z=1.145±0.003(stat.)±0.021(syst.)±0.002(lumi.) is consistent with the Standard Model prediction using the PDF4LHC21 PDF set.",

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doi = "10.1016/J.PHYSLETB.2023.138376",

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Measurement of the tt‾ cross section and its ratio to the Z production cross section using pp collisions at √s=13.6 TeV with the ATLAS detector. / Kabana, Sonia; Lagouri, Theodota; ATLAS Collaboration.
En: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 848, 138376, 01.2024, p. 1-25.

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

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AU - Kabana, Sonia

AU - Lagouri, Theodota

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PY - 2024/1

Y1 - 2024/1

N2 - The inclusive top-quark-pair production cross section σtt¯ and its ratio to the Z-boson production cross section have been measured in proton–proton collisions at s=13.6 TeV, using 29 fb−1 of data collected in 2022 with the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge electron-muon pair and b-tagged jets, and assuming Standard Model decays, the top-quark-pair production cross section is measured to be σtt¯=850±3(stat.)±18(syst.)±20(lumi.) pb. The ratio of the tt¯ and the Z-boson production cross sections is also measured, where the Z-boson contribution is determined for inclusive e+e− and μ+μ− events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the tt¯ cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, Rtt¯/Z=1.145±0.003(stat.)±0.021(syst.)±0.002(lumi.) is consistent with the Standard Model prediction using the PDF4LHC21 PDF set.

AB - The inclusive top-quark-pair production cross section σtt¯ and its ratio to the Z-boson production cross section have been measured in proton–proton collisions at s=13.6 TeV, using 29 fb−1 of data collected in 2022 with the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge electron-muon pair and b-tagged jets, and assuming Standard Model decays, the top-quark-pair production cross section is measured to be σtt¯=850±3(stat.)±18(syst.)±20(lumi.) pb. The ratio of the tt¯ and the Z-boson production cross sections is also measured, where the Z-boson contribution is determined for inclusive e+e− and μ+μ− events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the tt¯ cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, Rtt¯/Z=1.145±0.003(stat.)±0.021(syst.)±0.002(lumi.) is consistent with the Standard Model prediction using the PDF4LHC21 PDF set.

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Measurement of the tt‾ cross section and its ratio to the Z production cross section using pp collisions at √s=13.6 TeV with the ATLAS detector

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