Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons
Name
Sirunyan2019_Article_MeasurementsOfTtMathrmTOverlin.pdf
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Author(s)
CMS Collaboration
Alternative Title
Measurements of t[line over t] differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons
Date Issued
February 2019
Journal
Journal of high energy physics
Citation
CMS Collaboration (Sirunyan, A.M., et al.), "Measurements of tt differential cross sections in proton-proton collisions at √s=13 TeV using events containing two leptons." Journal of high energy physics 2019 (Feb. 2019): no. 149 doi 10.1007/JHEP02(2019)149 ©2019 Author(s)
Version
Final published version
Abstract
Measurements of differential top quark pair t[line over t] 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 t[line over t] 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 t[line over t] and leptonic charge asymmetries. ©2019
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP02(2019)149
