Measurement of the single top associated production cross section with ATLAS

ORAL

Abstract

The production cross section of a W boson associated with a single top-quark is measured with the ATLAS detector in pp collisions at the LHC. Events containing at least one central high pt jet and two oppositely-charged leptons are selected. To separate the Wt signal from the large backgrounds, a boosted decision trees method is employed that combines several discriminant variables into one classifier. A template fit to the classifier output distribution is used to measure the signal cross section. The CKM matrix element Vtb is also determined from this measurement.

–

Authors

  • Peng Ge

    School of Physics, Shandong University, Jinan, P.R.China

  • Reinhard Schwienhorst

    Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA

  • Huaqiao Zhang

    Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA