CMS-PAS-HIG-14-009

CMS-PAS-HIG-14-009
Precise determination of the mass of the Higgs boson and studies of the compatibility of its couplings with the standard model
CMS Collaboration
July 2014

Abstract: Properties of the Higgs boson with mass near 125 GeV are measured in proton-proton collisions with the CMS experiment at the LHC. A comprehensive set of production and decay measurements are combined. The decays to $\gamma\gamma$, ZZ, WW, $\tau\tau$, and bb pairs are exploited, including studies targeting Higgs bosons produced in association with a pair of top quarks. The data samples were collected in 2011 and 2012 and correspond to integrated luminosities of up to 5.1 fb$^{-1}$ at 7 TeV and up to 19.7 fb$^{-1}$ at 8 TeV; the final detector calibration and alignment are used in the event reconstruction. From the high-resolution $\gamma\gamma$ and ZZ channels, the mass of this Higgs boson is measured to be 125.03 $^{+0.26}_{-0.27}$ (stat.) $^{+0.13}_{-0.15}$ (syst.) GeV, with the precision dominated by the statistical uncertainty. For this mass, the event yields obtained in the different analyses tagging specific decay modes and production mechanisms are consistent with those expected for the standard model Higgs boson. The combined best-fit signal strength, relative to the standard model expectation, is found to be 1.00 $\pm$ 0.09 (stat.) $^{+0.08}_{-0.07}$ (theo.) $\pm$ 0.07 (syst.) at the measured mass. Various searches for deviations in the magnitudes of the Higgs boson scalar couplings from those predicted for the standard model are performed. No significant deviations are found.
Links: CDS record (PDF) ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; These preliminary results are superseded in this paper, EPJC 75 (2015) 212. The superseded preliminary plots can be found here.

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