Single Top Results from CDF
Abstract
Description
The CDF Collaboration has analyzed 955/pb of CDF II data to search for electroweak single top quark production at the Tevatron. We employ three different analysis techniques to search for a single top signal: multivariate likelihood functions; neural networks; the matrix element analysis technique. The sensitivities to a single top signal at the rate predicted by the Standard Model are 2.1 - 2.6 sigma. The first two analyses observe a deficit of single top-like events and set upper limits on the production cross section. The matrix element analysis observes a 2.3 sigma single top excess and measures a combined t-channel and s-channel cross section of 2.7 +1.5-1.3 pb. Using the same dataset, we have searched for non-Standard Model production of single top quarks through a heavy W' boson resonance. No evidence for a signal is observed. We exclude at the 95 % C.L. W' boson production with masses of 760 GeV/c^2 (790 GeV/c^2) in case the right handed neutrino is smaller (larger) than the mass of the W' boson.
Conference Proceedings for Rencontres de Moriond EW 2007
Conference Proceedings for Rencontres de Moriond EW 2007