Observation of top quark pairs produced in association with a vector boson in pp collisions at s = 8 √s=8 TeV
Name
Khachatryan2016_Article_ObservationOfTopQuarkPairsProd.pdf
Description
Published version
Size
3.18 MB
Format
Adobe PDF
Checksum (MD5)
07a6a24db5c5bed52b4688188f078d45
Author(s)
The CMS Collaboration
Date Issued
2016
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
Khachatryan, V., et al. "Observation of Top Quark Pairs Produced in Association with a Vector Boson in Pp Collisions at Root S=8 Tev." Journal of High Energy Physics 1 (2016).
Version
Final published version
Abstract
© 2016, Springer Verlag. All rights reserved. Measurements of the cross sections for top quark pairs produced in association with a W or Z boson are presented, using 8 TeV pp collision data corresponding to an integrated luminosity of 19.5 fb-1, collected by the CMS experiment at the LHC. Final states are selected in which the associated W boson decays to a charged lepton and a neutrino or the Z boson decays to two charged leptons. Signal events are identified by matching reconstructed objects in the detector to specific final state particles from tt̄W or tt̄Z decays. The tt̄W cross section is measured to be (Formula Presented) fb with a significance of 4.8 standard deviations from the background-only hypothesis. The tt̄Z cross section is measured to be (Formula Presented) fb with a significance of 6.4 standard deviations from the background-only hypothesis. These measurements are used to set bounds on five anomalous dimension-six operators that would affect the tt̄W and tt̄Z cross sections.
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/JHEP01(2016)096
