Measurement of spin correlations in tt? production using the matrix element method in the muon+jets final state in pp collisions at √s=8 TeV
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
758
Pages
321-346
Date Issued
2016
Author(s)
Abstract
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) +0.15 -0.13 (syst), representing the most precise measurement of this quantity in the muon+jets final state to date.
SDGs
Type
journal article