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

Abstract

We present the results of a search for supersymmetry with gauge-mediated breaking and $\NONE\toγ\Gravitino$ in the $\gamma \gamma$+missing transverse energy final state. In 2.6$\pm$0.2 \invfb of $p\bar{p}$ collisions at $\sqrt{s}$$=$1.96 TeV recorded by the CDF II detector we observe no candidate events, consistent with a standard model background expectation of 1.4$\pm$0.4 events. We set limits on the cross section at the 95% C.L. and place the world's best limit of 149\gevc on the \none mass at ${\tau }_{{\tilde{\chi }}_1^0}$$<<$1 ns. We also exclude regions in the \none\ mass-lifetime plane for ${\tau }_{{\tilde{\chi }}_1^0}$$\lesssim$2 ns.

accepted to Phys. Rev. Lett

References in corpus (1)

• Search for Supersymmetry in Di-Photon Final States at sqrt{s} = 1.96 TeV

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