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Report number arXiv:1207.7235 ; CMS-HIG-12-028 ; CERN-PH-EP-2012-220 ; CMS-HIG-12-028 ; CERN-PH-EP-2012-220
Title Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
Related titleObservation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
Author(s) CMS Collaboration  Afficher les 2900 auteurs
Publication 2012-08-17
Imprint 31 Jul 2012
Number of pages 32
In: Phys. Lett. B 716 (2012) 30-61
In: Higgs booklet, pp.30
DOI 10.1016/j.physletb.2012.08.021
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; CMS
Free keywords Higgs physics
Abstract Results are presented from searches for the standard model Higgs boson in proton-proton collisions at s=7 and 8 TeV in the CMS experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and 5.3 inverse femtobarns at 8 TeV. The search is performed in five decay modes: γγ, ZZ, WW, τ+τ, and bb¯. An excess of events is observed above the expected background, a local significance of 5.0 standard deviations, at a mass near 125 GeV, signalling the production of a new particle. The expected significance for a standard model Higgs boson of that mass is 5.8 standard deviations. The excess is most significant in the two decay modes with the best mass resolution, γγ and ZZ; a fit to these signals gives a mass of 125.3 ± 0.4 (stat.) ± 0.5 (syst.) GeV. The decay to two photons indicates that the new particle is a boson with spin different from one.
Copyright/License publication: © 2012-2025 CERN (License: CC-BY-3.0)
preprint: © 2012-2025 CERN (License: CC-BY-3.0)



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 Notice créée le 2012-07-31, modifiée le 2024-10-18


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