Title
Search for top-quark production via flavor-changing neutral currents in W+1 jet events at CDF Search for top-quark production via flavor-changing neutral currents in W+1 jet events at CDF
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
102(2009) :15 , p. 151801,1-151801,7
ISSN
0031-9007
ISI
000265285700013
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We report on a search for the non-standard-model process u(c)+g→t using pp&#773; 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 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)<3.9×10-4 and B(t→c+g)<5.7×10-3.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/3de738/fe611d05.pdf
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