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

Author(s)
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; ... Show more Show less
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Abstract
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.
Date issued
2010-01
URI
http://hdl.handle.net/1721.1/56263
Department
Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II.” Physical Review Letters 104.1 (2010): 011801. © 2010 The American Physical Society
Version: Final published version
ISSN
0031-9007

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