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dc.contributor.authorSirunyan, A. M.
dc.contributor.authorSanders, Stephen J.
dc.contributor.authorThe CMS collaboration
dc.identifier.citationThe CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Measurements of tt⎯⎯ differential cross sections in proton-proton collisions at s√=13 TeV using events containing two leptons. J. High Energ. Phys. 2019, 149 (2019).
dc.descriptionThis work is licensed under a Creative Commons Attribution 4.0 International License.en_US
dc.description.abstractMeasurements of differential top quark pair tt⎯⎯ cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the tt⎯⎯ system, and the total number of jets in the event. The differential cross sections are defined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract tt⎯⎯ and leptonic charge asymmetries.en_US
dc.publisherSpringer Verlagen_US
dc.rightsCopyright CERN, for the benefit of the CMS Collaboration.en_US
dc.subjectHadron-Hadron scattering (experiments)en_US
dc.subjectTop physicsen_US
dc.titleMeasurements of tt⎯⎯ differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptonsen_US
kusw.kuauthorSanders, Stephen J.
kusw.kudepartmentPhysics and Astronomyen_US
kusw.oaversionScholarly/refereed, publisher versionen_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US

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Copyright CERN, for the benefit of the CMS Collaboration.
Except where otherwise noted, this item's license is described as: Copyright CERN, for the benefit of the CMS Collaboration.