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

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

We present the results of a search for supersymmetry with gauge-mediated breaking and χ˜[subscript 1][superscript 0]→γG˜ in the γγ+missing transverse energy final state. In 2.6±0.2  fb[superscript -1] of pp̅ collisions at √s=1.96  TeV recorded by the CDF II detector we observe no candidate events,...

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Bibliographic Details
Main Authors: Bauer, Gerry P., Choudalakis, Georgios, Gomez-Ceballos, Guillelmo, Goncharov, M., Hahn, Kristian Allan, Henderson, C., Knuteson, Bruce O., Makhoul, K., Paus, Christoph M. E., Xie, Si
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2010
Online Access:http://hdl.handle.net/1721.1/56263
https://orcid.org/0000-0002-6047-4211
Description
Summary:We present the results of a search for supersymmetry with gauge-mediated breaking and χ˜[subscript 1][superscript 0]→γG˜ in the γγ+missing transverse energy final state. In 2.6±0.2  fb[superscript -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/c[superscript 2] on the χ˜[subscript 1][superscript 0] mass at τχ˜[subscript 1][superscript 0]≪1  ns. We also exclude regions in the χ˜[subscript 1][superscript 0] mass-lifetime plane for τχ˜[subscript 1][superscript 0]≲2  ns.

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