Search for Top-Quark Production via Flavor-Changing Neutral Currents in W+1 Jet Events at CDF
Name
Aaltonen-2009-Search for Top-Quark.pdf
Size
184.99 KB
Format
Adobe PDF
Checksum (MD5)
fe611d05fdf40993750e319be00a047b
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
Date Issued
April 2009
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
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].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.151801
