Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/115046
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Type: Journal article
Title: Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detector
Other Titles: Measurement of the inclusive and fiducial tt -bar production cross-sections in the lepton+jets channel in pp collisions at root s=8TeV with the ATLAS detector
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abdinov, O.
Abeloos, B.
Abidi, S.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adamczyk, L.
Adelman, J.
Adersberger, M.
Adye, T.
Affolder, A.
Afik, Y.
et al.
Citation: European Physical Journal C, 2018; 78(6):487-1-487-31
Publisher: Springer
Issue Date: 2018
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
M. Aaboud ... D. Duvnjak ... P. Jackson ... L. Lee ... A. Petridis ... M.J. White ... [et al.] (The ATLAS Collaboration)
Abstract: The inclusive and fiducial tt¯ production cross-sections are measured in the lepton+jets channel using 20.2 fb⁻¹ of proton–proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale and b-tagging efficiency are constrained by separating selected events into three disjoint regions. In order to reduce systematic uncertainties in the most important background, the W+,jets process is modelled using Z+ jets events in a data-driven approach. The inclusive tt¯ cross-section is measured with a precision of 5.7% to be σinc(tt¯)=248.3±0.7(stat.)±13.4(syst.)±4.7(lumi.) pb, assuming a top-quark mass of 172.5 GeV. The result is in agreement with the Standard Model prediction. The cross-section is also measured in a phase space close to that of the selected data. The fiducial cross-section is σfid(tt¯)=48.8±0.1(stat.)±2.0(syst.)±0.9(lumi.) pb with a precision of 4.5%.
Keywords: ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2018
RMID: 0030090904
DOI: 10.1140/epjc/s10052-018-5904-z
Appears in Collections:Physics publications

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