Searches for the Higgs boson at the Tevatron

We present the results from the Tevatron on the direct searches for Standard Model Higgs boson produced in $p\bar{p}$ collisions at a center of mass energy of 1.96 TeV, using the data corresponding to the integrated luminosity of 10fb$^{-1}$. The searches are performed in the Higgs boson mass range from 100 to 200 GeV/c$^{2}$. The dominant production channels, $H\rightarrow b\bar{b}$ and $H \rightarrow WW$, are combined with all the secondary channels and significant analysis improvements have been implemented to maximize the search sensitivity. We observe a significant excess of data events compared to background predictions with the local significance of 3.0 standard deviations. The global significance for such an excess anywhere in the full mass range investigated is approximately 2.5 standard deviations.Comment: 5 pages, 4 figures, presented on the CIPANP 2012 conferenc

Tevatron Combination of Single-Top-Quark Cross Sections and Determination of the Magnitude of the Cabibbo-Kobayashi-Maskawa Matrix Element Vtb\bf V_{tb}

We present the final combination of CDF and D0 measurements of cross sections for single-top-quark production in proton-antiproton collisions at a center-of-mass energy of 1.96 TeV. The data correspond to total integrated luminosities of up to 9.7 fb$^{−1}$ per experiment. The t-channel cross section is measured to be σ$_t$=2.25$_{-0.31}^{+0.29}$ pb. We also present the combinations of the two-dimensional measurements of the s- vs t-channel cross section. In addition, we give the combination of the s+t channel cross section measurement resulting in σ$_{s+t}$=3.30$_{-0.40}^{+0.52}$ pb, without assuming the standard model value for the ratio σ$_s$/σ$_t$. The resulting value of the magnitude of the top-to-bottom quark coupling is |V$_{tb}$|=1.02$_{-0.05}^{+0.06}$, corresponding to |V$_{tb}$|>0.92 at the 95% C.L