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Scientific article
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English

Measurement of the Higgs boson mass with H → γγ decays in 140 fb−1 of √s=13 TeV pp collisions with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 847, 138315
Publication date2023
First online date2023-12-10
Abstract

The mass of the Higgs boson is measured in the H→γγ decay channel, exploiting the high resolution of the invariant mass of photon pairs reconstructed from the decays of Higgs bosons produced in proton–proton collisions at a centre-of-mass energy s=13 TeV. The dataset was collected between 2015 and 2018 by the ATLAS detector at the Large Hadron Collider, and corresponds to an integrated luminosity of 140 fb−1. The measured value of the Higgs boson mass is 125.17±0.11(stat.)±0.09(syst.) GeV and is based on an improved energy scale calibration for photons, whose impact on the measurement is about four times smaller than in the previous publication. A combination with the corresponding measurement using 7 and 8 TeV pp collision ATLAS data results in a Higgs boson mass measurement of 125.22±0.11(stat.)±0.09(syst.) GeV. With an uncertainty of 1.1 per mille, this is currently the most precise measurement of the mass of the Higgs boson from a single decay channel.

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Keywords
  • P p: colliding beams
  • Higgs particle: hadroproduction
  • P p: scattering
  • Higgs particle: radiative decay
  • Photon: pair production
  • Mass spectrum: two-photon
  • Mass spectrum: (2photon)
  • Higgs particle: mass: measured
  • Higgs particle: decay modes
  • ATLAS
  • Calibration
  • CERN LHC Coll
  • Resolution
  • Data analysis method
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Measurement of the Higgs boson mass with H →<i> γγ</i> decays in 140 fb<sup>−1 </sup>of <i>√s</i>=13 TeV pp collisions with the ATLAS detector. In: Physics letters. B, 2023, vol. 847, p. 138315. doi: 10.1016/j.physletb.2023.138315
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ISSN of the journal0370-2693
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