Abstract
We present measurements of lepton () angular distributions in top-quark () pair production and decays produced in collisions at a center-of-mass energy of , where is an electron or muon. Using data corresponding to an integrated luminosity of , collected with the D0 detector at the Fermilab Tevatron Collider, we measure for the first time the leptonic forward-backward asymmetry in dilepton final states and obtain , corrected for detector acceptance. This is compared to the standard model prediction of . A deviation from the standard model prediction as previously seen in a D0 measurement based on the analysis of the final state is not observed in these dilepton final states. The two results differ from each other by 1.4 standard deviations and are combined to obtain . Furthermore, we present a first study of the top-quark polarization.
- Received 2 July 2012
DOI:https://doi.org/10.1103/PhysRevD.87.011103
© 2013 American Physical Society