Search for Higgs Bosons in $WW^{(*)}\to l^+l'^-$ Decays

The process $H\to WW^{(*)}\to l^+l'^-$ ($l$,$l'$ = $e$,$\mu$) is studied in $p\bar{p}$ collisions at the center of mass energy $\sqrt{s} =$1.96~TeV with the D0 detector at Fermilab. A Higgs particle with a mass greater than 140 GeV primarily decays into a pair of W-bosons and the semi-leptonic decay channels of the W provide a clear signature. The analysed data correspond to 2~fb$^{-1}$ of integrated luminosity.