Measurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV

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dc.date.accessioned2019-10-05T23:44:24Z
dc.date.accessioned2022-12-19T18:22:23Z
dc.date.available2019-10-05T23:44:24Z
dc.date.available2022-12-19T18:22:23Z
dc.date.created2019-10-05T23:44:24Z
dc.date.issued2019-04-29
dc.identifierEuropean Physical Journal C. New York: Springer, v. 79, n. 5, 36 p., 2019.
dc.identifier1434-6044
dc.identifierhttp://hdl.handle.net/11449/186729
dc.identifier10.1140/epjc/s10052-019-6863-8
dc.identifierWOS:000466407200001
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5367767
dc.description.abstractA measurement of the top quark-antiquark pair production cross section sigma(t (t) over bar) 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(+/-) mu(-/+), mu(+) mu(-), e(+) e(-)) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of m(t)(MC) = 172.5 GeV the fit yields a measured cross section sigma(t (t) over bar) = 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 m(t)(MC) = 172.33 +/- 0.14 (stat)(-0.72)(+0.66) (syst) GeV 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.
dc.languageeng
dc.publisherSpringer
dc.relationEuropean Physical Journal C
dc.rightsAcesso aberto
dc.sourceWeb of Science
dc.titleMeasurement of the t(t)over-bar production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at root s=13TeV
dc.typeArtículos de revistas


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