We report on a search for the non-standard-model process
u(c) + g -> t using p anti-p collision data collected by the CDF II
detector corresponding to 2.2 fb-1. The candidate events are classified
as signal-like or background-like by an artificial neural network.
The observed discriminant distribution yields no evidence for FCNC
top-quark production, resulting in an upper limit on the production
cross section sigma(u(c) + g > t) < 1.8 pb at the 95% C.L.
Using theoretical predictions we convert the cross-section limit to upper
limits on FCNC branching ratios: B(t --> u + g) < 3.9 x 10-4 and
B(t --> c + g) < 5.7 x 10-3.
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Updated: Monday, 2009 June 08 10:34:07 CDT automatically from input from carol picciolo