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Title
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Search for heavy long-lived particles that decay to photons at CDF II
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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 first search for heavy, long-lived particles that decay to photons at a hadron collider. We use a sample of γ+jet+missing transverse energy events in pp̅ collisions at √s=1.96 TeV taken with the CDF II detector. Candidate events are selected based on the arrival time of the photon at the detector. Using an integrated luminosity of 570 pb-1 of collision data, we observe 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 in a supersymmetric model with χ10→γG 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 letters. - New York, N.Y., 1958, currens
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Publication
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New York, N.Y.
:
American Physical Society
,
2007
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ISSN
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0031-9007
[print]
1079-7114
[online]
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DOI
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10.1103/PHYSREVLETT.99.121801
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Volume/pages
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99
:12
(2007)
, p. 121801,1-121801,7
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ISI
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000249668000020
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Full text (Publisher's DOI)
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Full text (open access)
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