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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22331
Title: Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF
Authors: CDF Collaboration; Cabrera, Susana; Cuenca Almenar, Cristóbal; Álvarez González, B.; Casal, Bruno; Cuevas, Javier; Gómez, G.; Rodrigo, Teresa; Ruiz, Alberto; Scodellaro, Luca; Vila, Iván; Vilar, Rocío; Aaltonen, T.
Issue Date: 17-Apr-2009
Publisher: American Physical Society
Citation: Physical Review Letters 102 (15): 151801 (2009)
Abstract: We report on a search for the non-standard-model process u(c)+g -> t using pp collision data collected by the Collider Detector at Fermilab II detector corresponding to 2.2 fb(-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 sigma(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)< 3.9x10(-4) and B(t -> c+g)< 5.7x10(-3).
Publisher version (URL): http://dx.doi.org/ 10.1103/PhysRevLett.102.151801
URI: http://hdl.handle.net/10261/22331
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.102.151801
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