Measurement of the tt Production Cross Section, The Top Quark Mass, and the Strong Coupling Constant Using Dilepton Events in pp Collisions at ? s = 13TeV

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dc.authorid249433en_US
dc.contributor.authorBilki, Burak
dc.contributor.author., ve diğer.
dc.date.accessioned2019-12-27T11:40:43Z
dc.date.available2019-12-27T11:40:43Z
dc.date.issued2019
dc.departmentİstanbul Beykent Üniversitesien_US
dc.description.abstractA measurement of the top quark–antiquark pair production cross section ?tt in proton–proton collisions at a centre-of-mass energy of 13 TeV is presented. The data correspond to an integrated luminosity of 35.9 fb?1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e± ? ?, ? + ? ?, e+e?) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mMC t = 172.5GeV the fit yields a measured cross section ?tt = 803 ± 2 (stat) ± 25 (syst) ± 20 (lumi) pb, in agreement with the expectation from the standard model calculation at next-to-next-toleading order. A simultaneous fit of the cross section and the top quark mass parameter in the powheg simulation is performed. The measured value of mMC t = 172.33 ± 0.14 (stat) +0.66 ?0.72 (syst)GeV is in good agreement with previous measurements. The resulting cross section is used, together with the heoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions.en_US
dc.identifier.citationEur. Phys. J. C (2019) 79:368en_US
dc.identifier.doi10.1140/epjc/s10052-019-6863-8
dc.identifier.issn1434-6044
dc.identifier.issn1434-6052
dc.identifier.pmid31148943en_US
dc.identifier.scopus2-s2.0-85065028824
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-019-6863-8
dc.identifier.wosWOS:000466407200001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherThe CMS Collaborationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.subjectHigh Energy Physics - Experimenten_US
dc.titleMeasurement of the tt Production Cross Section, The Top Quark Mass, and the Strong Coupling Constant Using Dilepton Events in pp Collisions at ? s = 13TeVen_US
dc.typeArticleen_US

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