We present the results of a search for supersymmetry with gauge-mediated breaking and χ₁⁰→γG in the γγ+missing transverse energy final state. In 2.6±0.2 fb^-1 of pp̄ collisions at √s=1.96 TeV recorded by the CDF II detector we observe no candidate events, consistent with a standard model background expectation of 1.4±0.4 events. We set limits on the cross section at the 95% C.L. and place the world's best limit of 149 GeV/c² on the χ₁⁰ mass at τ_χ₁⁰1 ns. We also exclude regions in the χ₁⁰ mass-lifetime plane for τ_χ₁⁰2 ns.
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Aaltonen et al. (2010) studied this question.
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