This article reports on recent searches for single-top-quark
production by the CDF and D0 collaborations at the Tevatron. Neither two
CDF analyses, using data corresponding to 696 pb-1 of integrated
luminosity, nor a D0 search based on 370 pb-1 of data can establish a
signal for this standard model process. These null results translate in
upper limits on the cross section of 2.9 pb for the t-channel production
mode and 3.2 pb for the s-channel mode at the 95% C.L. In addition, the D0
collaboration has searched for non-standard model production of
single-top-quarks via a heavy W' boson. No signal of this process is found
resulting in lower mass limits of 610 GeV/c2 for a left-handed W' and 630
GeV/c2 for a right-handed W' boson.
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Updated: Wednesday, 2007 August 08 15:42:29 CDT automatically from input from Carol Picciolo