Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Measurement of spin correlation in ttbar production using dilepton final states
AU - Collaboration, D0
AU - Bertram, Iain
AU - Borissov, Guennadi
AU - Fox, Harald
AU - Ross, Anthony
AU - Williams, Mark
AU - Ratoff, Peter
N1 - 10 pages, 3 figures, submitted to PLB
PY - 2011/7/3
Y1 - 2011/7/3
N2 - 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.
AB - 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.
U2 - 10.1016/j.physletb.2011.05.077
DO - 10.1016/j.physletb.2011.05.077
M3 - Journal article
VL - 702
SP - 16
EP - 23
JO - Physics Letters B
JF - Physics Letters B
SN - 0370-2693
IS - 1
ER -