Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II.
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Published: 2009
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DOWNLOAD EBOOKThe authors present the results of a search for supersymmetry with gauge-mediated breaking and {tilde {chi}}1° → [gamma]{tilde G} in the [gamma][gamma] + missing transverse energy final state. In 2.6 ± 0.2 fb−1 of p{bar p} collisions at √s = 1.96 TeV recorded by the CDF II detector they observe no candidate events, consistent with a standard model background expectation of 1.4 ± 0.4 events. They set limits on the cross section at the 95% C.L. and place the world's best limit of 149 GeV/c2 on the {tilde {chi}}1° mass at [tau]{sub {tilde {chi}}1°} “ 1 ns. They also exclude regions in the {tilde {chi}}1° mass-lifetime plane of [tau]{sub {tilde {chi}}1°} ≈