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Image of Hannah Herde in front of Fysicum captured by Johan Joelsson

Hannah Herde

Interests: Higgs physics • dark matter searches • solid state tracking detectors • track reconstruction • active teaching methods • digital art • improv

Image of Hannah Herde in front of Fysicum captured by Johan Joelsson

Measurement of the H→ γγ and H→ ZZ∗→ 4 ℓ cross-sections in pp collisions at √s=13.6 TeV with the ATLAS detector

Author

  • G. Aad
  • T.P.A. Åkesson
  • C. Doglioni
  • V. Hedberg
  • H. Herde
  • B. Konya
  • E. Lytken
  • R. Poettgen
  • N.D. Simpson
  • O. Smirnova
  • W. Zou
  • L. Zwalinski
Show all

Summary, in English

The inclusive Higgs boson production cross-section is measured in the di-photon and the ZZ∗→ 4 ℓ decay channels using 31.4 and 29.0 fb - 1 of pp collision data respectively, collected with the ATLAS detector at a centre-of-mass energy of s=13.6 TeV . To reduce the model dependence, the measurement in each channel is restricted to a particle-level phase space that closely matches the channel’s detector-level kinematic selection, and it is corrected for detector effects. These measured fiducial cross-sections are σfid,γγ= 76-13+14 fb, and σfid,4ℓ= 2.80±0.74 fb, in agreement with the corresponding Standard Model predictions of 67.6 ± 3.7 fb and 3.67 ± 0.19 fb. Assuming Standard Model acceptances and branching fractions for the two channels, the fiducial measurements are extrapolated to the full phase space yielding total cross-sections of σ(pp→H)=67-11+12 pb and 46 ± 12 pb at 13.6 TeV from the di-photon and ZZ∗→ 4 ℓ measurements respectively. The two measurements are combined into a total cross-section measurement of σ(pp→ H) = 58.2 ± 8.7 pb, to be compared with the Standard Model prediction of σ(pp→ H) SM= 59.9 ± 2.6 pb.

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration
  • Department of Physics

Publishing year

2024

Language

English

Publication/Series

European Physical Journal C

Volume

84

Issue

1

Document type

Journal article

Publisher

Springer

Topic

  • Subatomic Physics

Keywords

  • Bosons
  • Phase space methods
  • Tellurium compounds
  • A-center
  • ATLAS detectors
  • Center-of-mass energies
  • Decay channels
  • Higgs boson
  • Measurements of
  • Model prediction
  • Phase spaces
  • Production cross section
  • Standard model
  • Photons

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044