Franconi, Laura; Haug, Sigve; Weber, Michele; Anders, John Kenneth; Fehr, Armin; Beck, Hans Peter; Ereditato, Antonio; Merlassino, Claudia; Miucci, Antonio; Weston, Thomas Daniel (2020). Measurement of the t\bart production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at \sqrts=13\,\text TeV with the ATLAS detector. European physical journal. C - particles and fields, 80(6) EDP Sciences 10.1140/epjc/s10052-020-7907-9
|
Text
Aad2020_Article_MeasurementOfTheTBarTTtProduct_1_.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (3MB) | Preview |
The inclusive top quark pair (tt¯) production cross-section σtt¯ has been measured in proton–proton collisions at s√=13TeV, using 36.1 fb−1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ
pair and b-tagged jets, the cross-section is measured to be:
σtt¯=826.4±3.6(stat) ±11.5(syst) ±15.7(lumi) ±1.9(beam)pb,
where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mpolet
, giving mpolet=173.1+2.0−2.1GeV. It is also combined with measurements at s√=7TeV and s√=8TeV to derive ratios and double ratios of tt¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) 08 Faculty of Science > Physics Institute 10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) |
UniBE Contributor: |
Franconi, Laura, Haug, Sigve, Weber, Michele, Anders, John Kenneth, Ilg, Armin, Beck, Hans Peter, Ereditato, Antonio, Merlassino, Claudia, Miucci, Antonio, Weston, Thomas Daniel |
Subjects: |
500 Science > 530 Physics 500 Science > 510 Mathematics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
BORIS Import LHEP |
Date Deposited: |
05 May 2021 13:13 |
Last Modified: |
02 Mar 2023 23:34 |
Publisher DOI: |
10.1140/epjc/s10052-020-7907-9 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt |
BORIS DOI: |
10.48350/155599 |
URI: |
https://boris.unibe.ch/id/eprint/155599 |
Actions (login required)
 |
Edit item |