We present the results of the first hadron collider search
for heavy, long-lived neutralinos that decay via \overbar{chi}0_1
--> gamma \overbar{G}in gauge-mediated supersymmetry breaking models.
Using an integrated luminosity of 570 +/- 34 pb-1 of p anti-p collisions
at s**(1/2) = 1.96 TeV, we select gamma + jet + missing transverse
energy candidate events based on the arrival time of a high-energy
photon at the electromagnetic calorimeters measured with a timing system
that was recently installed on the CDF II detector. We find 2 events,
consistent with the background estimate of 1.3 +/- 0.7 events. While our
search strategy does not rely on model-specific dynamics, we set cross
section limits and place the world-best 95% C.L. lower limit on the
\overbar{chi}0_s mass of 101 GeV/c2 at tau_{\overbar{chi}0_1} = 5 ns.
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Updated: Friday, 2008 September 05 11:09:23 CDT automatically from input from carol picciolo