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Search for Supersymmetry Using Diphoton Events in $pp$ Collisions at $s=1.96$ TeV

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(2009)cite arxiv:0910.3643 Comment: To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726.

Abstract

We present the results of a search for supersymmetry with gauge-mediated breaking and $\NONE\to\gamma\Gravitino$ in the $\gamma\gamma$+missing transverse energy final state. In 2.6$\pm$0.2 of $pp$ collisions at $s$$=$1.96 TeV recorded by the CDF II detector we observe no candidate events, consistent with a standard model background expectation of 1.4$\pm$0.4 events. We set limits on the cross section at the 95% C.L. and place the world's best limit of 149 on the mass at $\tau_\chi_1^0$$łl$1 ns. We also exclude regions in the \none\ mass-lifetime plane for $\tau_\chi_1^0$$łesssim$2 ns.

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