Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at $$\sqrt{s}$$ =13 TeV
- Yerevan Physics Institute
- Institut für Hochenergiephysik
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- Nanjing Normal University
- Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)—Fudan University
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- Universidad de Los Andes
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- University of Split
- Institute Rudjer Boskovic
- University of Cyprus
- Charles University
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- University of Helsinki
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- Université de Strasbourg
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- Institut de Physique des 2 Infinis de Lyon (IP2I)
- Georgian Technical University
- RWTH Aachen University
- Deutsches Elektronen-Synchrotron
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- National and Kapodistrian University of Athens
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- HUN-REN Wigner Research Centre for Physics
- Eötvös Loránd University
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- HUN-REN ATOMKI—Institute of Nuclear Research
- Karoly Robert Campus
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- Saha Institute of Nuclear Physics
- Indian Institute of Technology
- Tata Institute of Fundamental Research-A
- Tata Institute of Fundamental Research-B
- National Institute of Science Education and Research
- Indian Institute of Science Education and Research (IISER)
- Isfahan University of Technology
- Institute for Research in Fundamental Sciences (IPM)
- University College Dublin
- INFN Sezione di Bari; Università di Bari
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- Universidad de Sonora (UNISON)
- Centro de Investigacion y de Estudios Avanzados del IPN
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- AGH University of Krakow
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- University of Belgrade
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- CERN, European Organization for Nuclear Research
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- CERN
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 fb−1 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 constrain 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$$^{+2.0}_{−1.5}$$ 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.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of Florida, Gainesville, FL (United States)
- Sponsoring Organization:
- US Department of Energy; USDOE; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- 89243024CSC000002; AC02-05CH11231; SC0010266
- OSTI ID:
- 2896379
- Report Number(s):
- CERN-EP-2024-210; CMS-HIG-21-019; FERMILAB-PUB--24-0735-CMS
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 111; ISSN 2470-0010; ISSN 2470-0029
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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