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Inclusive and differential cross section measurements of single top quark production in association with a Z boson in proton-proton collisions at √s = 13 TeV

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dc.contributor.authorKAYA, MİTHAT
dc.contributor.authorsTumasyan A., Adam W., Andrejkovic J., Bergauer T., Chatterjee S., Damanakis K., Dragicevic M., Escalante Del Valle A., Frühwirth R., Jeitler M., et al.
dc.date.accessioned2022-12-01T09:53:09Z
dc.date.available2022-12-01T09:53:09Z
dc.date.issued2022-02-01
dc.description.abstract© 2022, The Author(s).Inclusive and differential cross sections of single top quark production in association with a Z boson are measured in proton-proton collisions at a center-of-mass energy of 13 TeV with a data sample corresponding to an integrated luminosity of 138 fb−1 recorded by the CMS experiment. Events are selected based on the presence of three leptons, electrons or muons, associated with leptonic Z boson and top quark decays. The measurement yields an inclusive cross section of 87.9−7.3+7.5(stat)−6.0+7.3(syst) fb for a dilepton invariant mass greater than 30 GeV, in agreement with standard model (SM) calculations and represents the most precise determination to date. The ratio between the cross sections for the top quark and the top antiquark production in association with a Z boson is measured as 2.37−0.42+0.56(stat)−0.13+0.27(syst). Differential measurements at parton and particle levels are performed for the first time. Several kinematic observables are considered to study the modeling of the process. Results are compared to theoretical predictions with different assumptions on the source of the initial-state b quark and found to be in agreement, within the uncertainties. Additionally, the spin asymmetry, which is sensitive to the top quark polarization, is determined from the differential distribution of the polarization angle at parton level to be 0.54 ± 0.16 (stat) ± 0.06 (syst), in agreement with SM predictions. [Figure not available: see fulltext.]
dc.identifier.citationTumasyan A., Adam W., Andrejkovic J., Bergauer T., Chatterjee S., Damanakis K., Dragicevic M., Escalante Del Valle A., Frühwirth R., Jeitler M., et al., "Inclusive and differential cross section measurements of single top quark production in association with a Z boson in proton-proton collisions at √s = 13 TeV", Journal of High Energy Physics, cilt.2022, sa.2, 2022
dc.identifier.doi10.1007/jhep02(2022)107
dc.identifier.issn1029-8479
dc.identifier.issue2
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85125377511&origin=inward
dc.identifier.urihttps://hdl.handle.net/11424/283417
dc.identifier.volume2022
dc.relation.ispartofJournal of High Energy Physics
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectFizik
dc.subjectTemel Bilimler
dc.subjectPhysics
dc.subjectNatural Sciences
dc.subjectTemel Bilimler (SCI)
dc.subjectFİZİK, NÜKLEER
dc.subjectNatural Sciences (SCI)
dc.subjectPHYSICS
dc.subjectPHYSICS, NUCLEAR
dc.subjectNükleer ve Yüksek Enerji Fiziği
dc.subjectFizik Bilimleri
dc.subjectNuclear and High Energy Physics
dc.subjectPhysical Sciences
dc.subjectHadron-Hadron Scattering
dc.subjectTop Physics
dc.titleInclusive and differential cross section measurements of single top quark production in association with a Z boson in proton-proton collisions at √s = 13 TeV
dc.typearticle
dspace.entity.typePublication
local.avesis.idca07a286-5d2e-41ae-8225-de39730fdbb2
local.indexed.atSCOPUS
relation.isAuthorOfPublication2c082502-dd9a-43fe-9116-7abb739de594
relation.isAuthorOfPublication.latestForDiscovery2c082502-dd9a-43fe-9116-7abb739de594

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