Measurement of spin correlations in t t ‾ production using the matrix element method in the muon+jets final state in pp collisions at √ s = 8 TeV
Author(s)
The CMS Collaboration
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© 2016 The Author The consistency of the spin correlation strength in top quark pair production with the standard model (SM) prediction is tested in the muon+jets final state. The events are selected from pp collisions, collected by the CMS detector, at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The data are compared with the expectation for the spin correlation predicted by the SM and with the expectation of no correlation. Using a template fit method, the fraction of events that show SM spin correlations is measured to be 0.72±0.08(stat)−0.13+0.15(syst), representing the most precise measurement of this quantity in the muon+jets final state to date.
Date issued
2016Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publisher
Elsevier BV
Citation
Khachatryan, V., et al. "Measurement of Spin Correlations in Tt Production Using the Matrix Element Method in the Muon+Jets Final State in Pp Collisions at vS=8 Tev." Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 758 (2016): 321-46.
Version: Final published version