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Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

Chatrchyan, S.
•
Khachatryan, V.
•
Sirunyan, A. M.
altro
Wenman, D.
2012
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
Abstract
Results are presented from searches for the standard model Higgs boson in proton–proton collisions at sqrt(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: γγ, ZZ, W+W−W+W−, τ+τ−τ+τ−, and bb ̄. 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, 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.
DOI
10.1016/j.physletb.2012.08.021
WOS
WOS:000309621400002
Archivio
http://hdl.handle.net/11368/2573228
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84865786005
Diritti
metadata only access
Soggetti
  • PARTICLE PHYSICS

  • LARGE HADRON COLLIDER...

  • CMS

Scopus© citazioni
7004
Data di acquisizione
Jun 14, 2022
Vedi dettagli
Web of Science© citazioni
3603
Data di acquisizione
Mar 5, 2024
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