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  • Measurement of spin correla...
    Alexeev, G.D.; Alkhazov, G.; Badaud, F.; Bean, A.; Bertram, I.; Blazey, G.; Boehnlein, A.; Bolton, T.A.; Borissov, G.; Brandt, A.; Brandt, O.; Brooijmans, G.; Buescher, V.; Bunichev, V.; Castilla-Valdez, H.; Chakraborty, D.; Choi, S.; Cihangir, S.; Claes, D.; Clutter, J.; Cooke, M.; Corcoran, M.; Couderc, F.; Cousinou, M.-C.; Das, A.; Dutt, S.; Dyshkant, A.; Filthaut, F.; Gadfort, T.; Garcia-Bellido, A.; Gavrilov, V.; Gerber, C.E.; Greenlee, H.; Greenwood, Z.D.; Gregores, E.M.; Grohsjean, A.; Gutierrez, G.; Haas, A.; Hagopian, S.; Harder, K.; Hesketh, G.; Huske, N.; Illingworth, R.; Ito, A.S.; Jabeen, S.; Joshi, J.; Kasper, P.A.; Kermiche, S.; Khanov, A.; Khatidze, D.; Kohli, J.M.; Kraus, J.; Kumar, A.; Kuzmin, V.A.; Lammers, S.; Linnemann, J.; Lipaev, V.V.; Lopes de Sa, R.; Maciel, A.K.A.; Martínez-Ortega, J.; Meijer, M.M.; Melnitchouk, A.; Muanza, G.S.; Narain, M.; Nayyar, R.; Neal, H.A.; Negret, J.P.; Orduna, J.; Osman, N.; Pal, A.; Parua, N.; Pétroff, P.; Pol, M.-E.; Popov, A.V.; Prokopenko, N.; Ranjan, K.; Razumov, I.; Ruchti, R.; Salcido, P.; Savage, G.; Schlobohm, S.; Schwienhorst, R.; Slattery, P.; Söldner-Rembold, S.; Stark, J.; Tsai, Y.-T.; Uvarov, S.; Van Kooten, R.; van Leeuwen, W.M.; Verzocchi, M.; Wahl, H.D.; Wang, M.H.L.S.; Welty-Rieger, L.; Williams, M.R.J.; Wobisch, M.; Xu, C.; Yacoob, S.; Yip, K.; Youn, S.W.; Zieminska, D.

    Physics letters. B, 08/2011, Letnik: 702, Številka: 1
    Journal Article

    We measure the correlation between the spin of the top quark and the spin of the anti-top quark in tt¯→W+bW−b¯→ℓ+νbℓ−ν¯b¯ final states produced in pp¯ collisions at a center of mass energy 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¯ 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.