Observation of Single Top Quark Production at DØ using Bayesian Neural Networks
J. Joshi, S. B. Beri · 2011
We present observation of the electroweak production of single top quarks in 2.3 fb of data recorded by the DO experiment at the Fermilab Tevatron collider operating at 1.96 TeV center-of-mass energy. The cross section of single top quark production for the combined tb+tqb channels measured is 4.70 +1.18 −0.93 pb using Bayesian neural networks (BNN). The probability to measure a cross section at this value or higher in the absence of signal is 3.2 x 10, corresponding to a 5.4 standard deviation significance for the observation.