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Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at sqrt{s} = 13 TeV
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Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at sqrt{s} = 13 TeV
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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 $\pm$ 0.12 GeV, and an upper limit on the width $\Gamma_\mathrm{H}$ $\lt$ 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.
Forward citations
Cited by 5 Pith papers
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Off-shell Higgs boson measurements: Yukawa couplings, self-coupling, compositeness, and width
Using off-shell Higgs production in 138 fb^-1 of 13 TeV CMS data, the collaboration measured Γ_H = 5.1^{+2.0}_{-1.8} MeV, excluded no off-shell production at >5σ, and set the first direct 95% CL lower bound Λ_H > 870 ...
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The Higgs boson through the lens of electroweak precision data
Updated Gfitter EW fit with new MW average yields SM-consistent indirect observables and, via kappa_V from oblique parameters plus LHC signal strengths, determines Gamma_H to ~10% precision under leading-log assumptions.
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A measurement of the Higgs boson mass in the diphoton decay channel in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS measures the Higgs mass in H→γγ with 138 fb⁻¹ at 13 TeV as 125.13 ± 0.15 GeV, and 125.06 ± 0.14 GeV when combined with 7+8 TeV diphoton data.
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Measurements of the Higgs boson production, fiducial and differential cross-sections in the four lepton decay channel using 164 fb$^{-1}$ of data collected at $\sqrt{s}$ = 13.6 TeV with the ATLAS detector
Higgs boson cross-section in H→4ℓ measured as 3.65 fb with new LHC data, consistent with SM expectation of 3.68 fb and signal strength 0.99±0.13.
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Measurements of the Higgs boson production, fiducial and differential cross-sections in the four lepton decay channel using 164 fb$^{-1}$ of data collected at $\sqrt{s}$ = 13.6 TeV with the ATLAS detector
ATLAS measures the fiducial cross-section for H to four leptons as 3.65 fb matching the SM prediction of 3.68 fb, with signal strength 0.99 and differential distributions all consistent with expectations.
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