D0 Collaboration2017-10-052017-10-052016-06-10Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Agnew, J. P., ... & Atkins, S. (2016). Measurement of spin correlation between top and antitop quarks produced in p (p) over-bar collisions at root s= 1.96 TeV.https://hdl.handle.net/1808/25074We present a measurement of the correlation between the spins of t and ¯t quarks produced in proton–antiproton collisions at the Tevatron Collider at a center-of-mass energy of 1.96TeV. We apply a matrix element technique to dilepton and single-lepton+jets final states in data accumulated with the D0 detector that correspond to an integrated luminosity of 9.7 fb−1. The measured value of the correlation coefficient in the off-diagonal basis, Ooff = 0.89 ± 0.22 (stat + syst), is in agreement with the standard model prediction, and represents evidence for a top–antitop quark spin correlation difference from zero at a level of 4.2 standard deviations.© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY licensehttp://creativecommons.org/licenses/by/4.0/Measurement of spin correlation between top and antitop quarks produced in p¯p collisions at √ s = 1.96 TeVArticle10.1016/j.physletb.2016.03.053openAccess