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Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF

Author(s)
Xie, Si; Knuteson, Bruce O.; Henderson, C.; Hahn, Kristian Allan; Gomez-Ceballos, Guillelmo; Choudalakis, Georgios; Paus, Christoph M. E.; Makhoul, Khaldoun; Goncharov, Maxim; Bauer, Gerry P; ... Show more Show less
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Abstract
We report on a search for the non-standard-model process u(c)+g→t using pp̅ collision data collected by the Collider Detector at Fermilab II detector corresponding to 2.2  fb[superscript -1]. The candidate events are classified as signal-like or backgroundlike by an artificial neural network. The observed discriminant distribution yields no evidence for flavor-changing neutral current top-quark production, resulting in an upper limit on the production cross section σ(u(c)+g→t)<1.8  pb at the 95% C.L. Using theoretical predictions we convert the cross section limit to upper limits on flavor-changing neutral current branching ratios: B(t→u+g)<3.9×10[superscript -4] and B(t→c+g)<5.7×10[superscript -3].
Date issued
2009-04
URI
http://hdl.handle.net/1721.1/51850
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF.” Physical Review Letters 102.15 (2009): 151801. © 2009 The American Physical Society
Version: Final published version
ISSN
0031-9007

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