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Scientific article
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English

Measurement of the Higgs boson mass in the $H \to ZZ^* \to 4 \ell$ decay channel using 139 fb$^{-1}$ of $\sqrt s$ = 13 TeV $pp$ collisions recorded by the ATLAS detector at the LHC

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 843, 137880
Publication date2023
First online date2023-06-12
Abstract

The mass of the Higgs boson is measured in the H→ZZ⁎→4ℓ decay channel. The analysis uses proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector between 2015 and 2018, corresponding to an integrated luminosity of 139 fb−1. The measured value of the Higgs boson mass is 124.99±0.18(stat.)±0.04(syst.) GeV. In final states with muons, this measurement benefits from an improved momentum-scale calibration relative to that adopted in previous publications. The measurement also employs an analytic model that takes into account the invariant-mass resolution of the four-lepton system on a per-event basis and the output of a deep neural network discriminating signal from background events. This measurement is combined with the corresponding measurement using 7 and 8 TeV pp collision data, resulting in a Higgs boson mass of 124.94±0.17(stat.)±0.03(syst.) GeV.

eng
Keywords
  • P p: colliding beams
  • P p: scattering
  • Higgs particle: decay modes
  • Z0: pair production
  • Z0: leptonic decay
  • Final state: (4lepton)
  • Higgs particle: mass: measured
  • CERN LHC Coll
  • ATLAS
  • Muon: pair production
  • Calibration
  • Background
  • Mass resolution
  • Neural network
  • Statistical analysis
  • Data analysis method
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Measurement of the Higgs boson mass in the $H \to ZZ^* \to 4 \ell$ decay channel using 139 fb$^{-1}$ of $\sqrt s$ = 13 TeV $pp$ collisions recorded by the ATLAS detector at the LHC. In: Physics letters. B, 2023, vol. 843, p. 137880. doi: 10.1016/j.physletb.2023.137880
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ISSN of the journal0370-2693
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