Search for $H \rightarrow WW^\ast$ at CDF

We present a search for single Higgs production with decay to two W bosons using about $1~{\rm fb^{-1}}$ of CDF Run II data. For Higgs masses greater than about $140~{\rm GeV}/c^2$ the branching ratio to W pairs starts to dominate over that to $b\bar{b}$. We require that both W bosons decay leptonically, and use kinematic variables that discrimate between $H \rightarrow WW^\ast$ and the main background processes in the Neural Network to set cross-section limits on $\sigma (gg \rightarrow H) \times BR(H \rightarrow WW^\ast$ as function of Higgs masses between 110 and 200 GeV/$c^2$.