Results are presented from searches for the standard model (SM) Higgs boson in proton-proton collisions at $\sqrt{s}$ = 7 and 8 TeV, using data samples corresponding 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 in five decay modes: $\gamma\gamma$, ZZ, WW, $\tau \tau$, and bb. Updated results are presented except for the $\gamma\gamma$ mode. The significance of the recently discovered boson is now 6.9 \, \sigma. Its mass is measured to be 125.8~\pm0.4~(\mathrm{stat})~\pm0.4~(\mathrm{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 at the measured mass. 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 pseudo-scalar hypothesis $0^-$ with a CL$_s$ value of 2.4\%.

Log in to your administrator account to edit.