Evidence for a new state decaying into two photons in the search for the standard model Higgs boson in pp collisions

Collaboration
2012
28 pages
Report number:
  • CMS-PAS-HIG-12-015
Experiments:

Citations per year

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Abstract:
A search for a Higgs boson decaying into two photons is described. The analysis is performed using datasets recorded by the CMS experiment at the LHC from pp collisions at a centre-of-mass energies of 7~TeV and 8~TeV. The datasets correspond to an integrated luminosity of 5.1 and 5.3~fb1^{-1}, respectively. Limits are set on the cross section of the standard model Higgs boson decaying to two photons. An excess of events above the expected standard model background is observed for a Higgs boson mass hypothesis of 125~GeV, with a local significance of 4.1σ\sigma. The global significance of observing an excess with a local significance \geq4.1σ\sigma anywhere in the search range 110--150~GeV is estimated to be 3.2σ\sigma. This result constitutes evidence for the existence of a new state that decays into two photons.
Note:
  • Preliminary results
  • Data
  • p p: scattering
  • Higgs particle: mass
  • final state: two-photon
  • CERN LHC Coll
  • background
  • CMS
  • Higgs particle: search for
  • Higgs particle: radiative decay
  • cross section: mass dependence
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