Measurement of the Inclusive and Fiducial tt̅ Production Cross-Sections in the Lepton + Jets Channel in pp Collisions at √s=8 TeV with the ATLAS Detector

dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorAaboud, M.en_US
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAbeloos, B.en_US
dc.contributor.authorAbidi, S. H.en_US
dc.contributor.authorAbouZeid, O. S.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorMeirose, Bernharden_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.date.accessioned2018-11-05T21:05:18Z
dc.date.available2018-11-05T21:05:18Z
dc.date.created2018-06en_US
dc.date.issued2018-11-05
dc.description.abstractThe inclusive and fiducial tt̅ 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 tt̅ cross-section is measured with a precision of 5.7% to be σ_{inc} (tt̅) = 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 σ_{fid}(tt̅) = 48.8 ± 0.1 (stat.) ± 2.0 (syst.) ± 0.9 (lumi.) pb with a precision of 4.5%.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationAaboud, M., G. Aad, B. Abbott, O. Abdinov, et al. 2018. "Measurement of the inclusive and fiducial tt̅ production cross-sections in the lepton plus jets channel in pp collisions at √s=8 TeV with the ATLAS detector." European Physical Journal C 78(6), doi:10.1140/epjc/s10052-018-5904-zen_US
dc.identifier.issn1434-6044en_US
dc.identifier.issue6en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/6268
dc.identifier.volume78en_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.urihttp://dx.doi.org/10.1140/epjc/s10052-018-5904-z
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2018 CERN, for the ATLAS Collaborationen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceEuropean Physical Journal C
dc.subjectPartonsen_US
dc.subjectHadron collidersen_US
dc.subjectLarge Hadron Collider (France and Switzerland)en_US
dc.subjectMass (Physics)en_US
dc.subjectProton-proton interactionsen_US
dc.titleMeasurement of the Inclusive and Fiducial tt̅ Production Cross-Sections in the Lepton + Jets Channel in pp Collisions at √s=8 TeV with the ATLAS Detectoren_US
dc.type.genrearticleen_US

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