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Last updated on 2024-05-10 14:32
Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector
The inclusive top-quark-pair production cross section $\sigma_{t\bar{t}}$ and its ratio to the $Z$-boson production cross section have been measured in proton--proton collisions at $\sqrt{s} = 13.6$ 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 $\sigma_{t\bar{t}} = 850 \pm 3\mathrm{(stat.)}\pm 18\mathrm{(syst.)}\pm 20\mathrm{(lumi.)}$ pb. The ratio of the $t\bar{t}$ and the $Z$-boson production cross sections is also measured, where the $Z$-boson contribution is determined for inclusive $e^+e^-$ and $\mu^+\mu^-$ events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the $t\bar{t}$ cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, $R_{t\bar{t}/Z} = 1.145 \pm 0.003\mathrm{(stat.)}\pm 0.021\mathrm{(syst.)}\pm 0.002\mathrm{(lumi.)}$ is consistent with the Standard Model prediction using the PDF4LHC21 PDF set.
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When using this data, please cite the original publication:
ATLAS
Collaboration
(2024).
Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector. Phys.Lett.B 848 (2024) 138376.
Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector. HEPData (collection).
https://doi.org/10.17182/hepdata.143515
or, if you prefer, a specific version of the
record:
ATLAS
Collaboration
(2024).
Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.143515.v1
You can also cite the 8 data
tables
or the 3 additional
resources
individually.
Data tables
Choose table:
ATLAS
Collaboration
(2024).
“$Z$-boson phase-space” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t1
ATLAS
Collaboration
(2024).
“Cross section and ratio results” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t2
ATLAS
Collaboration
(2024).
“Pre-fit yields” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t3
ATLAS
Collaboration
(2024).
“Post-fit yields” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t4
ATLAS
Collaboration
(2024).
“Cross section ratio theory comparison” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t5
ATLAS
Collaboration
(2024).
“$t\bar{t}$ cross section nuisance parameter ranking” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t6
ATLAS
Collaboration
(2024).
“Cross section ratio nuisance parameter ranking” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t7
ATLAS
Collaboration
(2024).
“$Z$-boson cross section nuisance parameter ranking” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.143515.v1/t8
Additional resources
Choose resource:
ATLAS
Collaboration
(2024).
“separate_likelihood.json” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143515.v1/r1
ATLAS
Collaboration
(2024).
“ratio_likelihood.json” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143515.v1/r2
ATLAS
Collaboration
(2024).
“validateJSON.py” of “Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.143515.v1/r3
When using this data, please cite the original publication:
ATLAS
Collaboration
(2024).
Measurement of the $t\bar{t}$ cross section and its ratio to the $Z$ production cross section using $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS detector. Phys.Lett.B 848 (2024) 138376.
or, if you prefer, a specific version of the
record:
You can also cite the 8 data
tables
or the 3 additional
resources
individually.
Data tables
Choose table:
Additional resources
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