Search for Standard Model Higgs Bosons Produced in Association withWBosons

We report on the results of a search for standard model Higgs bosons produced in association with $W$ bosons from $p\overline{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$. The search uses a data sample corresponding to approximately $1{\mathrm{fb}}^{-1}$ of integrated luminosity. Events consistent with the $W\to \ell \nu$ and $H\to b\overline{b}$ signature are selected by triggering on a high-$p_T$ electron or muon candidate and tagging one or two of the jet candidates as having originated from $b$ quarks. A neural network filter rejects a fraction of tagged charm and light-flavor jets, increasing the $b$-jet purity in the sample. We observe no excess $\ell \nu b\overline{b}$ production beyond the background expectation, and we set 95% confidence level upper limits on the production cross section times branching fraction $\sigma (p\overline{p}\to WH)\mathrm{Br}(H\to b\overline{b})$ ranging from 3.9 to 1.3 pb, for specific Higgs boson mass hypotheses in the range 110 to $150\mathrm{GeV}/c^2$, respectively.