Measurement of the t-channel Single Top Quark Cross Section at D0

Single top quark production occurs via three different production modes with the relative contributions being sensitive to physics beyond the standard model. We present a measurement of the t channel cross section based on 5.4/fb of data at the D0 experiment at the Fermilab Tevatron proton-antiproton collider. The signal is separated from the background by use of a multivariate discriminant.