Measurement of the properties of a Higgs boson in the four-lepton final state

2013/12/31 by CMS Collaboration, S. Chatrchyan, V. Khachatryan +98 · 8 citations
Physics and Astronomy · #Boson #Branching fraction #Dark Matter and Cosmic Phenomena #Electron #Higgs boson #Inverse #Large Hadron Collider #Lepton #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Pseudoscalar #Quark #Standard Model (mathematical formulation) #hep-ex

paper · pdf · doi:10.1103/physrevd.89.092007

published as Phys. Rev. D 89 (2014) 092007 · Replaced with published version. Added journal reference and DOI

openalex publication_date 2014/05/14 · arxiv created 2014/06/10 · arxiv updated 2014/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

The properties of a Higgs boson candidate are measured in the H\ensuremath→ZZ\ensuremath→4\ensuremathℓ decay channel, with \ensuremathℓ=e, \ensuremathμ, using data from pp collisions corresponding to an integrated luminosity of 5.1 fb^\ensuremath-1 at the center-of-mass energy of √(s)=7 TeV and 19.7 fb^\ensuremath-1 at √(s)=8 TeV, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of 125.6\ifmmode±\else\textpm\fi0.4(stat)\ifmmode±\else\textpm\fi0.2(syst) GeV, and a total width \ensuremath≤3.4 GeV at the 95% confidence level. The production cross section of the new boson times its branching fraction to four leptons is measured to be 0.93_\ensuremath-0.23^+0.26(stat)_\ensuremath-0.09^+0.13(syst) times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard-model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-1 boson hypotheses are excluded at the 99% confidence level or higher. All tested spin-2 boson hypotheses are excluded at the 95% confidence level or higher.

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Cited by

• Cosmological selection of multi-TeV supersymmetry
• CP-Violation from Spin-1 Resonances in a Left-Right Dynamical Higgs Context
• Search for Higgs boson pair production in the bbbb b b ¯ b b ¯ final state from pp collisions at √(s) = 8 s = 8 TeVwith the ATLAS detector
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √s= 8 TeV
• Search for massive resonances decaying into pairs of boosted bosons in semi-leptonic final states at s √(s) = 8 TeV
• Testing Higgs boson scenarios in the phenomenological NMSSM
• Observation of Higgs Boson Decay to Bottom Quarks
• New features in the JHU generator framework: Constraining Higgs boson properties from on-shell and off-shell production

Related

• Higgs properties measurements using the four lepton decay channel
• Measurements of Higgs boson production cross section in the four-lepton final state in proton-proton collisions at √(s) = 13.6 TeV
• Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at √(s) = 13 TeV
• Higgs boson measurements in high resolution channels with CMS
• Higgs boson mass measurement using H→ ZZ→ 4ℓ decays at CMS