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- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
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- Results are presented from searches for the standard model Higgs boson in proton-proton collisions at root s = 7 and 8 TeV in the Compact Muon Solenoid experiment at the LHC, using data samples corresponding to integrated luminosities of up to 5.1 fb(-1) at 7 TeV and 5.3 fb(-1) at 8 TeV. The search is performed in five decay modes: gamma gamma, ZZ, W+W-, tau(+)tau(-), and b (b) over bar. An excess of events is observed above the expected background, with 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, gamma gamma 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. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
- 17-Sep-2012
- Physics Letters B. Amsterdam: Elsevier B.V., v. 716, n. 1, p. 30-61, 2012.
- 30-61
- Elsevier B.V.
- CMS
- Physics
- Higgs
- http://dx.doi.org/10.1016/j.physletb.2012.08.021
- http://hdl.handle.net/11449/24196
- Acesso aberto
- outro
- http://repositorio.unesp.br/handle/11449/24196
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