Forward-Backward Asymmetry in Top Quark Production in ppbar Collisions at sqrts=1.96 TeV
Abstract
Reconstructable final state kinematics and charge assignment in the reaction ppbar->ttbar allows tests of discrete strong interaction symmetries at high energy. We define frame dependent forward-backward asymmetries for the outgoing top quark in both the ppbar and ttbar rest frames, correct for experimental distortions, and derive values at the parton-level. Using 1.9/fb of ppbar collisions at sqrts=1.96 TeV recorded with the CDF II detector at the Fermilab Tevatron, we measure forward-backward top quark production asymmetries in the ppbar and ttbar rest frames of AFB,pp = 0.17 +- 0.08 and AFB,tt = 0.24 +- 0.14.
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