Abstract
The D0 Collaboration presents first evidence for the production of single top quarks at the Fermilab Tevatron collider. Using a dataset, we apply a multivariate analysis to separate signal from background and measure . The probability to measure a cross section at this value or higher in the absence of a signal is , corresponding to a 3.4 standard deviation significance. We use the cross section measurement to directly determine the Cabibbo-Kobayashi-Maskawa matrix element that describes the coupling and find at C.L. within the standard model.
- Received 22 December 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.181802
©2007 American Physical Society