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 H→γγH→γγ and H→ZZ∗→4ℓH→ZZ∗→4ℓ 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 H→γγ and H→ZZ∗→4ℓ decay channels, and a mass measurement in the H→ZZ∗→4ℓ decay channel. The total fiducial cross section is measured to be σγγfid=65.2±7.1 fb in the H→γγ channel and σ4ℓfid=3.28±0.32 fb in the H→ZZ∗→4ℓ 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 H→4ℓ analysis and of [−19,24] in the H→γγ analysis). Other differential distributions allow constraints on pseudo-observables and effective field theory coefficients. The Higgs boson mass in the H→ZZ∗→4ℓ decay channel is measured to be mH=124.92±0.19(stat.)+0.09−0.06(sys.) GeV. All the results are derived using 139 fb−1 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) |