Multivariate searches for single top quark production with the D0 detector

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

5-23-2007

Comments

Published in PHYSICAL REVIEW D 75, 092007 (2007). © 2007 The American Physical Society. Used by permission.

Abstract

We present a search for electroweak production of single top quarks in the s-channel (pp̅→ tb̅ + X) and t-channel (pp̅→tqb̅ + X) modes.We have analyzed 230 pb^-1 of data collected with the D0 detector at the Fermilab Tevatron Collider at a center-of-mass energy of √s = 1.96 TeV. No evidence for a single top quark signal is found. We set 95% confidence level upper limits on the production cross sections, based on binned likelihoods formed from a neural network output. The observed (expected) limits are 6.4 pb (4.5 pb) in the s-channel and 5.0 pb (5.8 pb) in the t-channel.