/ Experiment-HEP arXiv:0910.3606

Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II

Published in: Phys.Rev.Lett.
Year: 2010
Vol.: 104
Page No: 011801

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 \invfb of $p{\bar p}$ collisions at $\sqrt{s}$$=1.96 TeV recorded by the CDF II detector we observe no candidate events, consistent with a standard model background expectation of 1.4\pm0.4 events. We set limits on the cross section at the 95% C.L. and place the world's best limit of 149\gevc on the \none mass at \tau_{\tilde{\chi}_1^0}$$<<$1 ns. We also exclude regions in the \none\ mass-lifetime plane for $\tau_{\tilde{\chi}_1^0}$$\lesssim$2 ns.

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