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Measurement of spin correlation in t(t)over-bar production using dilepton final states
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2011 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 702, no 1, p. 16-23Article in journal (Refereed) Published
Abstract [en]

We measure the correlation between the spin of the top quark and the spin of the anti-top quark in t (t) over bar -> W(+)bW(-)(b) over bar -> l(+)vbl(-) (v) over bar(b) over bar final states produced in p (p) over bar collisions at a center of mass energy root 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 (t) over bar 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.

Place, publisher, year, edition, pages
2011. Vol. 702, no 1, p. 16-23
Keywords [en]
Top quark, Spin, QCD
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-158597DOI: 10.1016/j.physletb.2011.05.077ISI: 000294142600004OAI: oai:DiVA.org:uu-158597DiVA, id: diva2:440270
Available from: 2011-09-12 Created: 2011-09-12 Last updated: 2017-12-08Bibliographically approved

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