CERN Accelerating science

ATLAS Note
Report number ATL-PHYS-PROC-2020-123
Title Measurement of differential cross sections and the Higgs mass in Higgs boson decays to bosons using the ATLAS detector
Author(s) Laudrain, Antoine (Institut fuer Physik, Universitaet Mainz)
Corporate Author(s) The ATLAS collaboration
Collaboration ATLAS Collaboration
Publication SISSA, 2021
Imprint 17 Dec 2020
Number of pages 6
In: PoS ICHEP2020 (2021) 066
In: 40th International Conference on High Energy Physics (ICHEP), Prague, Czech Republic, 28 Jul - 6 Aug 2020, pp.066
DOI 10.22323/1.390.0066
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords Higgs ; H4l ; four-lepton ; Hgamgam ; di-photon ; fiducial cross sections ; differential cross sections ; mass measurement ; Higgs mass ; HIGGS
Abstract Despite small branching fractions, the HγγHγγ and HZZ4HZZ4 Higgs boson decays provide clean and well reconstructed final states, allowing for precise measurements of the Higgs boson properties. These proceedings present measurements of total and differential fiducial cross sections in the Hγγ and HZZ4 decay channels, and a mass measurement in the HZZ4 decay channel. The total fiducial cross section is measured to be σγγfid=65.2±7.1 fb in the Hγγ channel and σ4fid=3.28±0.32 fb in the HZZ4 channel, in agreement with the Standard Model predictions. Differential cross-section measurements are reported for Higgs boson production- and decay-related observables. The Higgs boson transverse momentum differential cross-section distributions are used to constrain the charm Yukawa coupling modifier (95% confidence level interval on κc of [12,11] in the H4 analysis and of [19,24] in the Hγγ analysis). Other differential distributions allow constraints on pseudo-observables and effective field theory coefficients. The Higgs boson mass in the HZZ4 decay channel is measured to be mH=124.92±0.19(stat.)+0.090.06(sys.)  GeV. All the results are derived using 139 fb1 of s=13 TeV proton-proton collisions collected with the ATLAS detector during the Run 2 of the LHC.
Copyright/License publication: © 2021-2024 The Author(s) (License: CC-BY-NC-ND-4.0)

Corresponding record in: Inspire


 Record created 2020-12-17, last modified 2021-11-25


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