Measurement of spin correlation in ttbar production using dilepton final states

Collaboration, D0 and Bertram, Iain and Borissov, Guennadi and Fox, Harald and Ross, Anthony and Williams, Mark and Ratoff, Peter (2011) Measurement of spin correlation in ttbar production using dilepton final states. Physics Letters B, 702 (1). pp. 16-23. ISSN 0370-2693

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Abstract

We measure the correlation between the spin of the top quark and the spin of the anti-top quark in (ttbar -> W+ W- b bbar -> l+ nu b l- nubar bbar) final states produced in ppbar collisions at a center of mass energy sqrt(s)=1.96 TeV, where l is an electron or muon. The data correspond to an integrated luminosity of 5.4 fb-1 and were collected with the D0 detector at the Fermilab Tevatron collider. The correlation is extracted from the angles of the two leptons in the t and tbar rest frames, yielding a correlation strength C= 0.10^{+0.45}_{-0.45}, in agreement with the NLO QCD prediction within two standard deviations, but also in agreement with the no correlation hypothesis.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Additional Information:
10 pages, 3 figures, submitted to PLB
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
63677
Deposited By:
Deposited On:
24 Apr 2013 08:35
Refereed?:
Yes
Published?:
Published
Last Modified:
08 Jul 2020 03:34