Top Quark Induced Backgrounds to Higgs Production in the WW(*) → llνν Decay Channel at Next-to-Leading-Order in QCD

We present the complete next-to-leading-order (NLO) contributions to the pp -> e(+)nu(e)mu(-)(nu) over bar (mu)b (b) over bar + X process in the four-flavor scheme, i.e., with massive b quarks, and its contribution to the H -> WW(*()) -> ll nu nu measurement in the 1-jet bin at the LHC. This background process includes top pair, single top, and non-top-quark resonant contributions. The uncertainty at NLO from the renormalization and factorization scale dependence is about +30% - 20%. We show that the NLO corrections are relatively small, and that separating this background in top pair, Wt- and b-quark-associated ll nu nu production is a fair approximation.