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, c...

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Bibliographic Details
Main Authors: Bauer, Gerry P. (Contributor), Choudalakis, Georgios (Contributor), Gomez-Ceballos, Guillelmo (Contributor), Goncharov, M. (Contributor), Hahn, Kristian Allan (Contributor), Henderson, C. (Contributor), Knuteson, Bruce O. (Contributor), Makhoul, K. (Contributor), Paus, Christoph M. E. (Contributor), Xie, Si (Contributor)
Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
Format: Article
Language:English
Published: American Physical Society, 2010-07-12T18:29:27Z.
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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.
United States. Dept. of Energy
National Science Foundation
Istituto Nazionale di Fisica Nucleare of Italy
Ministry of Education, Culture, Sports, Science and Technology of Japan
Natural Sciences and Engineering Research Council of Canada
National Science Council of the Republic of China
Swiss National Science Foundation
Alfred P. Sloan Foundation
Bundesministerium für Bildung und Forschung, Germany
World Class University Program
National Research Foundation of Korea
Science and Technology Facilities Council, United Kingdom
Royal Society, United Kingdom
Institut National de Physique Nucleaire et Physique des Particules/CNRS
Russian Foundation for Basic Research
MEC (Spain)
Slovak R&D Agency
Academy of Finland

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