We present the results of the first hadron collider search
for heavy, long-lived neutralinos that decay via \sim{\chi}0_1 -->
gamma\sim{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 calorimeter as 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
\sim{chi}0_1 mass of 101 GeV/c2 at tau_\sim{chi}0_1 = 5 ns.
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Updated: Wednesday, 2008 April 09 09:40:44 CDT automatically from input from carol picciolo