Electroweak Production of Top Quarks in the Electron+Jets Channel at D{\O}

Electroweak production of the top quark (single top) has yet to be observed. The single top cross section is sensitive to new physics and to the CKM matrix parameter $V_{tb}$. The D\Oexperiment has collected so far more than 350 pb$^{-1}$ of data at $\sqrt{s}= 1.96$ TeV in $p\bar{p}$ collisions during Run II of the Fermilab Tevatron collider. Preliminary results of a search for single top quark production in the top decay channel $t\rightarrow Wb\rightarrow e \nu$+jets are presented.