Updated measurements of the Higgs boson at 125 GeV in the two photon decay channel

CMS Physics Analysis Summaries
Report number	CMS-PAS-HIG-13-001
Title	Updated measurements of the Higgs boson at 125 GeV in the two photon decay channel
Corporate author(s)	CMS Collaboration
Collaboration	CMS Collaboration
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; CMS
Abstract	Results are reported from a search for the Standard Model Higgs boson in the two photon channel in the mass range $110 < m_H < 150$ GeV, using the full dataset recorded by the CMS experiment at the LHC from pp collisions at centre-of-mass energies of 7 and 8 TeV. The most sensitive, MVA, analysis observes an excess of events at a mass of 125 GeV, with a local significance of 3.2$\sigma$ (standard deviations), where a local significance of 4.2$\sigma$ is expected from a standard model Higgs boson. The best-fit signal strength, $\sigma/\sigma_{SM}$, is $0.78\pm 0.27$ at $m_H = 125$ GeV, and the mass is fitted to be $125.4 \pm 0.5(stat.) \pm 0.6(syst.)$. The cut-based analysis observes a corresponding excess with a local significance of 3.9$\sigma$ (3.5$\sigma$ expected), and $\sigma/\sigma_{SM} = 1.11 \pm 0.31$ at $m_H = 124.5$ GeV. All measurements are compatible among themselves and with a Higgs boson with a mass of 125.4 GeV.
Other source	Inspire
Related	superseded by: CERN-PH-EP-2014-117, CERN-PH-EP-2014-265
Email contact: [email protected] Fulltext in PDF Figure_001 Figure_002-a Figure_002-b Figure_002-c Figure_002-d Figure_002-e Figure_003-a Figure_003-b Figure_003-c Figure_003-d Figure_003-e Figure_003-f Figure_004-a Figure_004-b Figure_004-c Figure_005-a Figure_005-b Figure_006-a Figure_006-b Figure_007-a Figure_007-b Figure_008-a Figure_008-b Figure_009-a Figure_009-b Figure_010-a Figure_010-b Figure_011-a Figure_011-b Figure_012 Additional information for the analysis (restricted access)