SM Higgs searches by CMS at the LHC

Results are presented from searches for the standard model (SM) Higgs boson in proton-proton collisions at the CM energies of 7 and 8 TeV in five decay modes: $\gamma \gamma$, $ZZ$, $WW$, $\tau \tau$, and $b \bar b$. The analysed data correspond to integrated luminosities of up to 5.1 $fb^{-1}$ at 7 TeV and up to 12.2 $fb^{-1}$ at 8 TeV. The search is performed in the mass range 110 - 1000 GeV. No evidence is found for a significant excess of events that could be attributed to an additional particle, beyond the recently observed boson with a mass near 125 GeV. The significance of the latter is now 6.9 sigma. Its mass is measured to be $125.8 \pm 0.4 (stat) \pm 0.4 (syst)$ GeV. The event yields obtained by the different analyses targeting specific decay modes and production mechanisms are consistent with those expected for the SM Higgs boson . The best-fit signal strength for all channels combined, expressed in units of the SM Higgs boson cross section, is $0.88 \pm 0.21$. The consistency of the couplings of the observed boson with those predicted for the SM Higgs boson is tested in various ways, and no significant deviations are found. Under the assumption that the observed boson has spin zero, the data disfavour the psudo-scalar hypothesis with a CLs value of 2.4\%.