Details

Autor(en) / Beteiligte

• Abazov, V.M.
• Sajot, G.
• Stark, J.
• Greder, S.
• Miconi, F.
• Ripp-Baudot, I.
• Grenier, G.
• Kurca, T.
• Lebrun, P.
• Cousinou, M.-C.
• Duperrin, A.
• Geng, W.
• Kajfasz, E.
• Kermiche, S.
• Nagy, E.
• Osman, N.
• Jaffré, M.
• Grivaz, J.-F.
• Pétroff, P.
• Guillemin, T.

Titel

Measurement of spin correlation between top and antitop quarks produced in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV

Ist Teil von

• Physics letters. B, 2016, Vol.757, p.199-206

Ort / Verlag

Elsevier

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present a measurement of the correlation between the spins of t and tbar quarks produced in proton-antiproton collisions at the Tevatron Collider at a center-of-mass energy of 1.96 TeV. We apply a matrix element technique to dilepton and single-lepton+jets final states in data accumulated with the D0 detector that correspond to an integrated luminosity of 9.7 fb$^{-1}$. The measured value of the correlation coefficient in the off-diagonal basis, $O_{off} = 0.89 \pm 0.22$ (stat + syst), is in agreement with the standard model prediction, and represents evidence for a top-antitop quark spin correlation difference from zero at a level of 4.2 standard deviations.