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

, D0 Collaboration (2016) Measurement of spin correlation between top and antitop quarks produced in pp¯ collisions at √s = 1.96 TeV. Physics Letters B, 757. pp. 199-206. ISSN 0370-2693

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Abstract

Abstract 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, O off = 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.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Additional Information:
© 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
79120
Deposited By:
Deposited On:
19 Apr 2016 13:10
Refereed?:
Yes
Published?:
Published
Last Modified:
02 Dec 2020 03:07