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Measurement of tt spin correlation in pp collisions using the CDF II detector at the Tevatron

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review. D. 2011, vol. 83, no. 03, p. 031104
Abstract The tt spin correlation at production is a fundamental prediction of QCD and a potentially incisive test of new physics coupled to top quarks. We measure the tt spin state in pp collisions at s√=1.96  TeV using 1001 candidate events in the lepton plus jets decay channel reconstructed in the CDF II detector. In the helicity basis, for a top-quark mass of 172.5  GeV/c2, we find a spin correlation coefficient κ=0.60±0.50  (stat)±0.16  (syst), consistent with the QCD prediction, κ≈0.40.
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CDF COLLABORATION. Measurement of tt spin correlation in pp collisions using the CDF II detector at the Tevatron. In: Physical Review. D, 2011, vol. 83, n° 03, p. 031104. https://archive-ouverte.unige.ch/unige:38666

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Deposited on : 2014-07-15

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