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Preprint
Report number arXiv:2409.13663 ; CMS-HIG-21-019 ; CERN-EP-2024-210 ; CMS-HIG-21-019-003
Title Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at s= 13 TeV
Related supersedes: CMS-PAS-HIG-21-019
Author(s) CMS Collaboration  Show all 2379 authors
Corporate author(s) CMS Collaboration
Publication 2024
Imprint 20 Sep 2024
Number of pages 55
Note Submitted to Physical Review D. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-21-019 (CMS Public Pages)
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; CMS
Keywords Higgs physics
Abstract A measurement of the Higgs boson mass and width via its decay to two Z bosons is presented. Proton-proton collision data collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb1 at a center-of-mass energy of 13 TeV is used. The invariant mass distribution of four leptons in the on-shell Higgs boson decay is used to measure its mass and contrain its width. This yields the most precise single measurement of the Higgs boson mass to date, 125.04 ± 0.12 GeV, and an upper limit on the width ΓH< 330 MeV at 95% confidence level. A combination of the on- and off-shell Higgs boson production decaying to four leptons is used to determine the Higgs boson width, assuming that no new virtual particles affect the production, a premise that is tested by adding new heavy particles in the gluon fusion loop model. This result is combined with a previous CMS analysis of the off-shell Higgs boson production with decay to two leptons and two neutrinos, giving a measured Higgs boson width of 3.0 1.5+2.0 MeV, in agreement with the standard model prediction of 4.1 MeV. The strength of the off-shell Higgs boson production is also reported. The scenario of no off-shell Higgs boson production is excluded at a confidence level corresponding to 3.8 standard deviations.
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Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Submitted by cms-publication-committee-chair@cern.ch



 


 Record created 2024-09-20, last modified 2025-03-07


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