Search for Higgs boson using a matrix-element technique at CDF

We present a search for Higgs produced in association with a $W$ boson using 2 fb$^{-1}$ of data accumulated with the CDF detector at the Fermilab Tevatron. Events used in this analysis are selected with one charged lepton, large missing transverse energy, and two or three jets, where at least one jet is identified as a $b$-quark jet using displaced secondary-vertex information from the silicon detector. Using a matrix-element analysis technique and a neural-network jet-flavor separator we improve separation of signal and background and greatly improve the sensitivity of our search.