Abstract: We present a combination of searches for the standard model Higgs boson using the full CDF run II data set, which corresponds to an integrated luminosity of 9:45?10:0 fb 1 collected from ffiffi s p ¼ 1:96 TeV pp collisions at the Fermilab Tevatron. The searches consider Higgs boson production from gluongluon fusion, vector-boson fusion, and associated production with either a W or Z boson or a tt pair. Depending on the production mode, Higgs boson decays to WþW , ZZ, bb , þ , and are examined. We search for a Higgs boson with masses (mH) in the range 90?200 GeV=c2. In the absence of a signal, we expect based on combined search sensitivity to exclude at the 95% credibility level the mass regions 90 < mH < 94 GeV=c2, 96 < mH < 106 GeV=c2, and 153 < mH < 175 GeV=c2. The observed exclusion regions are 90 < mH < 102 GeV=c2 and 149 < mH < 172 GeV=c2. A moderate excess of signallike events relative to the background expectation at the level of 2.0 standard deviations is present in the data for the mH ¼ 125 GeV=c2 search hypothesis. We also present interpretations of the data within the context of a fermiophobic model and an alternative standard model incorporating a fourth generation of fermions. Finally, for the hypothesis of a new particle with mass 125 GeV=c2, we constrain the coupling strengths of the new particle to W bosons, Z bosons, and fermions.

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