Show simple item record

dc.contributorCMS Collaboration
dc.creatorSirunyan, A M
dc.creatorTumasyan, A
dc.creatorAdam, W
dc.creatorAmbrogi, F
dc.creatorAdžić, Petar
dc.creatorĆirković, Predrag
dc.creatorDevetak, Damir
dc.creatorĐorđević, Miloš
dc.creatorMilenović, Predrag
dc.creatorMilošević, Jovan
dc.date.accessioned2019-07-17T09:48:06Z
dc.date.available2019-07-17T09:48:06Z
dc.date.issued2019
dc.identifier.issn1434-6044 (print)
dc.identifier.issn1434-6052 (electronic)
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/8183
dc.description.abstractA measurement of the top quark–antiquark pair production cross section σ t t ¯ in proton–proton collisions at a centre-of-mass energy of 13Te is presented. The data correspond to an integrated luminosity of 35.9fb-1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e ± μ ∓ , μ + μ - , e + e - ) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mtMC=172.5Ge the fit yields a measured cross section σtt¯=803±2(stat)±25(syst)±20(lumi)pb, in agreement with the expectation from the standard model calculation at next-to-next-to-leading order. A simultaneous fit of the cross section and the top quark mass parameter in the powheg simulation is performed. The measured value of mtMC=172.33±0.14(stat)-0.72+0.66(syst)Ge is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions. © 2019, CERN for the benefit of the CMS collaboration.
dc.language.isoen
dc.rightsopenAccess
dc.sourceEuropean Physical Journal C
dc.titleMeasurement of the t t ¯ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at √s=13Teen
dc.typearticleen
dc.rights.licenseBY
dcterms.abstractДордевиц, М; Миленовиц, П; Милосевиц, Ј; Цирковиц, П; Деветак, Д; Сирунyан, A М; Тумасyан, A; Aдам, W; Aмброги, Ф; Aдзиц, П;
dc.rights.holder© 2019, CERN for the benefit of the CMS collaboration.
dc.citation.volume79
dc.citation.issue5
dc.citation.spage368
dc.identifier.wos000466407200001
dc.identifier.doi10.1140/epjc/s10052-019-6863-8
dc.identifier.pmid31148943
dc.contributor.countCMS Collaboration (ukupan broj autora: 2293)
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-85065028824
dc.identifier.fulltexthttp://vinar.vin.bg.ac.rs//bitstream/id/11419/Sirunyan2019_Article_MeasurementOfTheMathrmTOverlin.pdf


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record