Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II
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Aaltonen, Timo Antero; Álvarez González, Bárbara; Amerio, Silvia; Amidei, Dante; Anastassov, Anton; Annovi, Alberto; Antos, Jaroslav; Apollinari, Giorgio; Apresyan, Artur; Arisawa, Tetsuo; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, Gervasio; Rodrigo Anoro, Teresa


Date
2010-01-04Derechos
© 2010 The American Physical Society
Publicado en
Physical Review Letters, vol. 104, iss. 1 art. num. 011801 (2010)
Publisher
American Physical Society
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Abstract:
We present the results of a search for supersymmetry with gauge-mediated breaking and χ˜10→γG˜ in the γγ+missing transverse energy final state. In 2.6±0.2 fb-1 of pp̅ 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 χ˜10 mass at τχ˜10≪1 ns. We also exclude regions in the χ˜10 mass-lifetime plane for τχ˜10≲2 ns.
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