Search for non-resonant Higgs boson pair production in final states with leptons, taus, and photons in pp collisions at s \sqrt{s} = 13 TeV with the ATLAS detector

Collaboration
May 30, 2024
60 pages
Published in:
  • JHEP 08 (2024) 164,
  • JHEP 08 (2024) 164
  • Published: Aug 21, 2024
    and
  • Published: Aug, 2024
e-Print:
Report number:
  • CERN-EP-2024-131
Experiments:

Citations per year

2023202420251112
Abstract: (Springer)
A search is presented for non-resonant Higgs boson pair production, targeting the bbZZ, 4V (V = W or Z), VVττ, 4τ, γγVV and γγττ decay channels. Events are categorised based on the multiplicity of light charged leptons (electrons or muons), hadronically decaying tau leptons, and photons. The search is based on a data sample of proton-proton collisions at s \sqrt{s} = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb1^{−1}. No evidence of the signal is found and the observed (expected) upper limit on the cross-section for non-resonant Higgs boson pair production is determined to be 17 (11) times the Standard Model predicted cross-section at 95% confidence level under the background-only hypothesis. The observed (expected) constraints on the HHH coupling modifier, κλ_{λ}, are determined to be −6.2 < κλ_{λ}< 11.6 (−4.5 < κλ_{λ}< 9.6) at 95% confidence level, assuming the Standard Model for the expected limits and that new physics would only affect κλ_{λ}.[graphic not available: see fulltext]
Note:
  • Higgs Physics
  • Hadron-Hadron Scattering
  • p p: colliding beams
  • Higgs particle: pair production
  • p p: scattering
  • Higgs particle: decay modes
  • vector boson: pair production
  • photon: pair production
  • tau: pair production
  • bottom: pair production