Search for Associated Higgs Boson Production WH→WWW*→l±νl'±ν'+X in pp¯ Collisions at s=1.96TeV

We present a search for associated Higgs boson production in the process pp¯→WH→WWW^*→l^±νl^'±ν^'+X in final states containing two like-sign isolated electrons or muons (e^±e^±, e^±μ^±, or μ^±μ^±). The search is based on D0 run II data samples corresponding to integrated luminosities of 360 380pb^-1. No excess is observed over the predicted standard model background. We set 95% C.L. upper limits on σ(pp¯→WH)×Br(H→WW^*) between 3.2 and 2.8 pb for Higgs boson masses from 115 to 175 GeV.