A search for the Higgs boson is presented in H → WW ∗ → μτhad decays in pp collisions at a center-of-mass energy of √ s = 1.96 TeV. Final states containing hadronically decaying tau τ as well as μ + e events where an e is misreconstructed as τ have been considered. In order to stay orthogonal in the analysis at hand a veto on events selected by the corresponding H → WW ∗ → eμ analysis is applied. The data, corresponding to an integrated luminosity of about ∼ 1000 pb , has been collected from April 2002 to November 2005 using the Run II D0 detector. No significant excess above the Standard Model background has been observed, and limits on the cross section for mH = 120, 140, 160 and 180 GeV have been set.
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