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Title
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Search for heavy, long-lived neutralinos that decay to photons at CDF II using photon timing
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We present the results of the first hadron collider search for heavy, long-lived neutralinos that decay via χ10→γG in gauge-mediated supersymmetry breaking models. Using an integrated luminosity of 570±34 pb-1 of pp̅ collisions at √s=1.96 TeV, we select γ+jet+missing transverse energy candidate events based on the arrival time of a high-energy photon at the electromagnetic calorimeter as measured with a timing system that was recently installed on the CDF II detector. We find 2 events, consistent with the background estimate of 1.3±0.7 events. While our search strategy does not rely on model-specific dynamics, we set cross section limits and place the world-best 95% C.L. lower limit on the χ10 mass of 101 GeV/c2 at τχ10=5 ns. |
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Language
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English
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Source (journal)
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Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
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Publication
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Ridge, N.Y.
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American Physical Society
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2008
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ISSN
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1550-7998
[print]
1550-2368
[online]
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DOI
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10.1103/PHYSREVD.78.032015
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Volume/pages
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78
:3
(2008)
, p. 032015,1-032015,29
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ISI
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000258975300019
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Full text (Publisher's DOI)
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Full text (open access)
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