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Measurements of the $\mathrm{t}\overline{\mathrm{t}}$ production cross section in lepton+jets final states in pp collisions at 8 $\,\text {TeV}$ and ratio of 8 to 7  $\,\text {TeV}$ cross sections

2017-01-07Journal article Open access
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dc.contributor.authorCMS collaboration (2309 authors)
dc.contributor.authorHollar, Jonathan
dc.contributor.authorCalpas, Betty
dc.contributor.authorNayak, Aruna
dc.contributor.authorBargassa, Pedrame
dc.contributor.authorBeirão Da Cruz E Silva, Cristóvão
dc.contributor.authorDi Francesco, Agostino
dc.contributor.authorFaccioli, Pietro
dc.contributor.authorFerreira Parracho, Pedro Guilherme
dc.contributor.authorGallinaro, Michele
dc.contributor.authorLeonardo, Nuno
dc.contributor.authorLloret Iglesias, Lara
dc.contributor.authorNguyen, Federico
dc.contributor.authorRodrigues Antunes, Joao
dc.contributor.authorSeixas, Joao
dc.contributor.authorToldaiev, Oleksii
dc.contributor.authorVadruccio, Daniele
dc.contributor.authorVarela, Joao
dc.contributor.authorVischia, Pietro
dc.contributor.authorDavid Tinoco Mendes, Andre
dc.contributor.authorSilva, Pedro
dc.contributor.authorMusella, Pasquale
dc.contributor.authorPela, Joao
dc.date.accessioned2019-02-04T09:22:16Z
dc.date.available2019-02-04T09:22:16Z
dc.date.issued2017-01-07
dc.date.updated2019-02-04T09:22:16Z
dc.description.abstractA measurement of the top quark pair production ( $\mathrm{t}\overline{\mathrm{t}} $ ) cross section in proton–proton collisions at the centre-of-mass energy of 8 $\,\text {TeV}$ is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6 $\,\text {fb}^{-\text {1}}$ . This analysis is performed in the $\mathrm{t}\overline{\mathrm{t}} $ decay channels with one isolated, high transverse momentum electron or muon and at least four jets, at least one of which is required to be identified as originating from hadronization of a b quark. The calibration of the jet energy scale and the efficiency of b jet identification are determined from data. The measured $\mathrm{t}\overline{\mathrm{t}} $ cross section is $228.5 \pm 3.8\,\text {(stat)} \pm 13.7\,\text {(syst)} \pm 6.0\,\text {(lumi)} \text { pb} $ . This measurement is compared with an analysis of 7 $\,\text {TeV}$ data, corresponding to an integrated luminosity of 5.0 $\,\text {fb}^{-\text {1}}$ , to determine the ratio of 8 $\,\text {TeV}$ to 7 $\,\text {TeV}$ cross sections, which is found to be $1.43 \pm 0.04\,\text {(stat)} \pm 0.07\,\text {(syst)} \pm 0.05\,\text {(lumi)} $ . The measurements are in agreement with QCD predictions up to next-to-next-to-leading order.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C77 (2017) 15; DOI 10.1140/epjc/s10052-016-4504-z
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-016-4504-z
dc.identifier.urihttp://hdl.handle.net/10400.26/27036
dc.language.isoeng
dc.titleMeasurements of the $\mathrm{t}\overline{\mathrm{t}}$ production cross section in lepton+jets final states in pp collisions at 8 $\,\text {TeV}$ and ratio of 8 to 7  $\,\text {TeV}$ cross sections
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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