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Title

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

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2009, vol. 102, no. 15, p. 151801
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 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.
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CDF COLLABORATION. Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF. In: Physical Review Letters, 2009, vol. 102, n° 15, p. 151801. https://archive-ouverte.unige.ch/unige:38536

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Deposited on : 2014-07-08

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