Measurement of Leptonic Asymmetries and Top Quark Polarization in ttbar Production
- Abazov, V.M.
- Li, H.
- Sajot, G.
- Stark, J.
- Greder, S.
- Miconi, F.
- Ripp-Baudot, I.
- Bassler, U.
- Bernardi, G.
- Besançon, M.
- Brown, D.
- Brown, J.
- Chapon, E.
- Chevalier-Tthéry, S.
- Couderc, F.
- Croc, A.
- Déliot, F.
- Deterre, C.
- Enari, Y.
- Grenier, G.
- Grohsjean, A.
- Hubacek, Z.
- Kurca, T.
- Lebrun, P.
- Lellouch, J.
- Madar, R.
- Royon, C.
- Shary, V.
- Titov, M.
- Tuchming, B.
- Verdier, P.
- Vilanova, D.
- C. Cousinou, M.
- Duperrin, A.
- Geng, W.
- Kajfasz, E.
- Kermiche, S.
- Nagy, E.
- Osman, N.
- Badaud, F.
- Gay, Pascal
- Gris, Ph.
- Grivaz, J.-F.
- Guillemin, T.
- Jaffré, M.
- Pétroff, P.
DOIAbstract
See paper for full list of authors - submitted to Phys. Rev. Lett., 8 pagesWe present measurements of lepton (l) angular distributions in ttbar -> W+ b W- b -> l+ nu b l- nubar bbar decays produced in ppbar collisions at a center-of-mass energy of sqrt(s)=1.96TeV, where l is an electron or muon. Using data corresponding to an integrated luminosity of 5.4fb^-1, collected with the D0 detector at the Fermilab Collider, we find that the angular distributions of l- relative to anti-protons and l+ relative to protons are in agreement with each other. Combining the two distributions and correcting for detector acceptance we obtain the forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat) +- 1.3(syst))%, compared to the standard model prediction of...
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