Measurement of spin correlation between top and antitop quarks produced in pp- collisions at √s = 1.96 TeV

D0 Collaboration

Research output: Contribution to journalArticle

7 Citations (Scopus)


We 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 1.96 TeV. 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.

Original languageEnglish
Pages (from-to)199-206
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2016 Jun 10


ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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