Forward-backward asymmetry in top-quark production in pp? collisions at s=1.96TeV
Journal
Physical Review Letters
Journal Volume
101
Journal Issue
20
Date Issued
2008
Author(s)
Aaltonen, T. et al. (CDF Collaboration)
Abstract
We present measurements of the forward-backward charge asymmetry in top pair production using 1.9 fb;{-1} of pp[over ] collisions at sqrt[s]=1.96 TeV recorded with the Collider Detector at Fermilab II. Correcting for acceptance and measurement dilutions we obtain parton-level asymmetries of A_{FB};{pp[over ]}=0.17+/-0.08 in the pp[over ] frame and A_{FB};{tt[over ]}=0.24+/-0.14 in the tt[over ] frame. The values are consistent with the standard model expectation and disfavor exotic production mechanisms with significant negative values.
Type
journal article