en
Scientific article
Open access
English

Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb-1 of pp collision data at $\sqrt{s}=13 TeV

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 2022, no. 3, 41
Publication date2022
First online date2022-03-07
Abstract

Searches are conducted for new spin-0 or spin-1 bosons using events where a Higgs boson with mass 125 GeV decays into four leptons (ℓ = e, μ). This decay is presumed to occur via an intermediate state which contains two on-shell, promptly decaying bosons: H → XX/ZX → 4ℓ, where the new boson X has a mass between 1 and 60 GeV. The search uses pp collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 139 fb$^{−1}$ at a centre-of-mass energy $ \sqrt{s} $ = 13 TeV. The data are found to be consistent with Standard Model expectations. Limits are set on fiducial cross sections and on the branching ratio of the Higgs boson to decay into XX/ZX, improving those from previous publications by a factor between two and four. Limits are also set on mixing parameters relevant in extensions of the Standard Model containing a dark sector where X is interpreted to be a dark boson.[graphic not available: see fulltext]

eng
Keywords
  • Beyond Standard Model
  • Hadron-Hadron Scattering
  • Higgs Physics
  • P p: scattering
  • P p: colliding beams
  • Higgs particle: branching ratio
  • New particle: mass
  • Z0: leptonic decay
  • Spin: 0
  • Spin: 1
  • Final state: (4lepton)
  • Dilepton: mass spectrum
  • Higgs particle: doublet
  • Photon: mixing
  • Photon: hidden sector
  • Photon: mass
  • Branching ratio: upper limit
  • Channel cross section: upper limit
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for Higgs bosons decaying into new spin-0 or spin-1 particles in four-lepton final states with the ATLAS detector with 139 fb<sup>-1</sup> of <i>pp</i> collision data at $\sqrt{s}=13 TeV. In: The journal of high energy physics, 2022, vol. 2022, n° 3, p. 41. doi: 10.1007/jhep03(2022)041
Main files (1)
Article (Published version)
Identifiers
ISSN of the journal1029-8479
10views
1downloads

Technical informations

Creation05/28/2024 3:50:12 PM
First validation06/03/2024 12:14:07 PM
Update time06/03/2024 12:14:07 PM
Status update06/03/2024 12:14:07 PM
Last indexation06/03/2024 12:14:27 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack