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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

2018-06-01Artigo científico Acesso aberto
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dc.contributor.authorATLAS Collaboration
dc.contributor.authorAguilar-Saavedra, J. A.
dc.contributor.institutionCeFITec – Centro de Física e Investigação Tecnológica
dc.contributor.pblSpringerOpen | Società Italiana di Fisica | EDP Sciences
dc.date.accessioned2019-07-08T22:36:36Z
dc.date.available2019-07-08T22:36:36Z
dc.date.issued2018-06-01
dc.descriptionWe thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, ERDF, FP7, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex and Idex, ANR, Region Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; CERCA Programme Generalitat de Catalunya, Generalitat Valenciana, Spain; the Royal Society and Leverhulme Trust, United Kingdom.
dc.description.abstractThe inclusive and fiducial tt¯ production cross-sections are measured in the lepton+jets channel using 20.2fb-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%.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent2500965
dc.identifier.doi10.1140/epjc/s10052-018-5904-z
dc.identifier.issn1434-6044
dc.identifier.otherPURE: 13596197
dc.identifier.otherPURE UUID: 78eff3e5-9a8c-4ad7-bcb2-88536d3b8010
dc.identifier.otherScopus: 85048534318
dc.identifier.otherPubMed: 30956553
dc.identifier.otherPubMedCentral: PMC6424173
dc.identifier.otherWOS: 000435153700003
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85048534318&partnerID=8YFLogxK
dc.identifier.urlhttps://www.scopus.com/pages/publications/85048534318
dc.language.isoeng
dc.peerreviewedyes
dc.subjectEngineering (miscellaneous)
dc.subjectPhysics and Astronomy (miscellaneous)
dc.titleMeasurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detectoren
dc.typejournal article
degois.publication.issue6
degois.publication.titleThe European Physical Journal C: Particles and Fields
degois.publication.volume78
dspace.entity.typePublication
rcaap.rightsopenAccess

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