Loading...
Observation of top quark pairs produced in association with a vector boson in pp collisions at s√=8 TeV
CMS Collaboration
CMS Collaboration
Citations
Altmetric:
Abstract
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 tt¯W or tt¯Z decays. The tt¯W cross section is measured to be 382− 102+ 117 fb with a significance of 4.8 standard deviations from the background-only hypothesis. The tt¯Z cross section is measured to be 242− 55+ 65 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 tt¯W and tt¯Z cross sections.
Description
Date
2016-01-18
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Verlag
Collections
Research Projects
Organizational Units
Journal Issue
Keywords
Electroweak interaction, Hadron-Hadron scattering, Top physics
Citation
The CMS collaboration, Khachatryan, V., Sirunyan, A.M. et al. J. High Energ. Phys. (2016) 2016: 96. https://doi.org/10.1007/JHEP01(2016)096