Measurement of the forward–backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set

Abstract

We measure the forward.backward asymmetry of the production of top-quark and antiquark pairs in proton-antiproton collisions at center-of-mass energy sqrt(s) =1.96 TeV using the full data set collected bythe Collider Detector at Fermilab (CDF) in Tevatron Run II corresponding to an integrated luminosity of 9.1^-1 fb. The symmetry is characterized by the rapidity difference between top quarks and antiquarks(Δy) and measured in the final state with two charged leptons (electrons and muons).