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| CMS-PAS-HIG-21-019 | ||
| Measurement of the Higgs boson mass and width using the four leptons final state | ||
| CMS Collaboration | ||
| 20 September 2023 | ||
| Abstract: A measurement of the Higgs boson mass and width using the decays to two Z bosons is presented, using the proton-proton data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 138 fb$ ^{-1} $ at a center-of-mass energy of 13 TeV. The on-shell production of the Higgs boson with the decay $ \mathrm{H} \to \mathrm{Z} \mathrm{Z}^* \to 4\ell $ is used to constrain its mass and width, which yields to the most precise single measurement of the mass to date $ \mathrm{m}_\mathrm{H} = $ 125.08 $ \pm $ 0.12 GeV and an upper limit on the width $ \Gamma_\mathrm{H} < $ 60 MeV at 68% confidence level. A combination of the on-shell and off-shell production of the Higgs boson is used to constrain its width, leading to the observed measurement on the width 2.9 $ ^{+2.3}_{-1.7} $ MeV, in agreement with the standard model prediction of 4.1 MeV. The strength of the off-shell Higgs boson production is also reported. | ||
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These preliminary results are superseded in this paper, Submitted to PRD. The superseded preliminary plots can be found here. |
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| Figures & Tables | Summary | Additional Figures & Tables | References | CMS Publications |
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| Figures | |
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Figure 1:
Observed data and the expected pre-fit distributions of the four-lepton invariant mass in the inclusive (top), 4$ \mu $ (middle left), 4e (middle right), 2e2$ \mu $ (bottom left) and 2$ \mu$2e (bottom right) final states. |
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Figure 1-a:
Observed data and the expected pre-fit distributions of the four-lepton invariant mass in the inclusive (top), 4$ \mu $ (middle left), 4e (middle right), 2e2$ \mu $ (bottom left) and 2$ \mu$2e (bottom right) final states. |
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Figure 1-b:
Observed data and the expected pre-fit distributions of the four-lepton invariant mass in the inclusive (top), 4$ \mu $ (middle left), 4e (middle right), 2e2$ \mu $ (bottom left) and 2$ \mu$2e (bottom right) final states. |
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Figure 1-c:
Observed data and the expected pre-fit distributions of the four-lepton invariant mass in the inclusive (top), 4$ \mu $ (middle left), 4e (middle right), 2e2$ \mu $ (bottom left) and 2$ \mu$2e (bottom right) final states. |
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Figure 1-d:
Observed data and the expected pre-fit distributions of the four-lepton invariant mass in the inclusive (top), 4$ \mu $ (middle left), 4e (middle right), 2e2$ \mu $ (bottom left) and 2$ \mu$2e (bottom right) final states. |
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Figure 1-e:
Observed data and the expected pre-fit distributions of the four-lepton invariant mass in the inclusive (top), 4$ \mu $ (middle left), 4e (middle right), 2e2$ \mu $ (bottom left) and 2$ \mu$2e (bottom right) final states. |
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Figure 2:
Observed data and the expected pre-fit distribution of the relative per-event mass uncertainty of the four-lepton system, in the inclusive final state, in the region of interest with 105 $ < m_{4\ell} < $ 140 GeV. |
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Figure 3:
Observed data and expected pre-fit distribution of the relative per-event mass uncertainty of the four-lepton system, inclusively for all considered final states. The bins are shown in the order of increasing $ \delta m_{4\ell}/m_{4\ell} $, in the region of interest with 105 $ < m_{4\ell} < $ 140 GeV. |
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Figure 4:
Observed data and pre-fit distribution of $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ of the four-leptons system, in the inclusive final state, in the region of interest of 105 $ < m_{4\ell} < $ 140 GeV. |
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Figure 5:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-a:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-b:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-c:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-d:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-e:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-f:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
png pdf |
Figure 5-g:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
png pdf |
Figure 5-h:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 5-i:
Observed data and pre-fit distributions of events in the off-shell region, in the Untagged (left column), VBF-tagged (middle column), and VH-tagged (right column) categories. The top row shows $ m_{4\ell} $ where a requirement on $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $, $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ or $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} > $ 0.6 is applied in order to enhance signal over background contributions. The middle row shows $ \mathcal{D}^\text{kin}_\text{bkg} $ (left), $ \mathcal{D}^{{\mathrm{VBF}}+{\text{dec}}}_\text{bkg} $ (middle), $ \mathcal{D}^{{\mathrm{V}\mathrm{H}}+{\text{dec}}}_\text{bkg} $ (right). The requirement $ m_{4\ell} > $ 340 GeV is applied in order to enhance signal over background contributions. The bottom row shows $ \mathcal{D}_\mathrm{bsi} $ with both of the $ m_{4\ell} $ and $ {\mathcal{D}}^{\text{kin}}_{\text{bkg}} $ requirements enhancing the signal contribution. |
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Figure 6:
Illustration of how the signal model for the fit changes with the $ \delta m_{4\ell}/m_{4\ell} $ bins, merging all final state. The resolution estimator $ \sigma^{68\%} $, defined as the Gaussian width used to fit the smallest invariant mass window containing 68% of the signal events, is also listed for each bin. |
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Figure 7:
Illustration of how the statistical model is constructed, combining all years and all final states. The light red line shows the signal, the light blue line shows the background and the brown line represents their sum. The solid black points with error bars show the data. |
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Figure 8:
Observed profile likelihood projection on $ m_{\mathrm{H}} $, split per final state and combined, using $ \mathcal{N} $-2$ D'_\text{VXBS} $ approach. Both statistical and systematic uncertainties have been considered. |
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Figure 9:
Summary of the observed CMS H boson mass measurements using the four-lepton final state. The red vertical line and the grey column represent the best fit value and the total uncertainty respectively as measured from the Run 1 and Run 2 combination. The yellow bands stands for the statistical uncertainty and the black error bars for the total uncertainty. |
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Figure 10:
1$-$CL extracted from Feldman-Cousins approach (black dots). A linear interpolation through the points is also shown.The error bars represent the spread of the simulated experiments for each point. |
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Figure 11:
Observed and expected profile likelihood projection on the H boson width using the on-shell and off-shell production. |
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Figure 12:
Observed 2D profile likelihood projection on the off-shell signal strength ($ \mu^\text{off-shell }_{\mathrm{F}} $,$ \mu^\text{off-shell }_{\mathrm{V}} $). |
| Tables | |
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Table 1:
Summary of the three production categories in the off-shell $ m_{4\ell} $ region. All discriminants are calculated with the JHUGEN signal and MCFM background matrix elements. The VH interference discriminant in the VH-tagged category is defined as the simple average of the ones corresponding to the ZH and WH processes. |
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Table 2:
The observed number of events and the post-fit expected yields for the H boson signal and background contributions in the on-shell region 105 $ < m_{4\ell} < $ 140 GeV. |
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Table 3:
Observed number of events and post-fit expections for the H boson signal and background contributions in the off-shell region $ m_{4\ell} > $ 220 GeV. |
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Table 4:
Best fit values for the mass of the H boson measured in the inclusive 4$ \ell $ final state and split for different flavor states using 1D only approach. Uncertainties are separated into statistical and systematic uncertainties, with the first one representing the statistical uncertainty. Expected results are obtained considering the hypothesis $ m_{\mathrm{H}} = $ 125.38 GeV. |
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Table 5:
Best fit values for the mass of the H boson measured in different 4$ \ell $ final states, in the final configuration ($ \mathcal{N}-2D'_{VXBS} $). Uncertainties in the measurement results are presented separately as statistical and systematic uncertainties, where the first one refers to statistical uncertainty. Expected results are obtained considering the hypothesis $ m_{\mathrm{H}} = $ 125.38 GeV. |
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Table 6:
Summary of the mass and total width $ \Gamma_\mathrm{H} $ measurements, showing the allowed 68% CL (central values with uncertainties) and 95% CL (in square brackets) intervals. Uncertainties are reported as a combination of statistical and systematic uncertainties. In the on-shell result, the width is restricted to be positive. |
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Table 7:
Summary of allowed 68% CL (central values with uncertainties) and 95% CL (in square brackets) intervals for $ \mu^\text{off-shell } $, $ \mu_{\mathrm{F}}^\text{off-shell } $, and $ \mu_{\mathrm{V}}^\text{off-shell } $ |
| Summary |
| A measurement of the H boson mass and width is presented using the decays to two Z bosons, using the data recorded with the CMS experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. The on-shell production of the H boson with the decay $ \mathrm{H}\to 4\ell $ is used to constrain its mass and width, leading to the most precise single measurement of the mass to date in this channel: $ m_{\mathrm{H}}= $ 125.08 $ \pm $ 0.12 GeV $ = $ 125.08 $ \pm $ 0.10 (stat.) $\pm$ 0.07 (syst.) GeV in agreement with the expected precision of $ \pm $ 0.12 GeV. The width constraint from the on-shell production only is $ \Gamma_\mathrm{H} < $ 60 MeV at 68% CL. A combination of the on-shell and off-shell production of the H boson is used to constrain its width, leading to the observed measurement on the width $ \Gamma_\mathrm{H}= $ 2.9 $ ^{+2.3}_{-1.7} $ MeV, in agreement with the standard model prediction of 4.1 MeV. The strength of the off-shell H boson production is also reported. |
| Additional Figures | |
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Additional Figure 1:
Comparison of the four-lepton invariant mass line shape with (red) and without (blue) the beam spot contraint, split per final state, merging all years. Top row: 4$ \mu $ and 4e; bottom row: 2e2$ \mu $ and 2$ \mu $2e. $ \sigma^{68\%} $, defined as the Gaussian width used to fit the smallest invariant mass window containing 68% of the signal event, is also shown. |
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Additional Figure 1-a:
Comparison of the four-lepton invariant mass line shape with (red) and without (blue) the beam spot contraint, split per final state, merging all years. Top row: 4$ \mu $ and 4e; bottom row: 2e2$ \mu $ and 2$ \mu $2e. $ \sigma^{68\%} $, defined as the Gaussian width used to fit the smallest invariant mass window containing 68% of the signal event, is also shown. |
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Additional Figure 1-b:
Comparison of the four-lepton invariant mass line shape with (red) and without (blue) the beam spot contraint, split per final state, merging all years. Top row: 4$ \mu $ and 4e; bottom row: 2e2$ \mu $ and 2$ \mu $2e. $ \sigma^{68\%} $, defined as the Gaussian width used to fit the smallest invariant mass window containing 68% of the signal event, is also shown. |
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Additional Figure 1-c:
Comparison of the four-lepton invariant mass line shape with (red) and without (blue) the beam spot contraint, split per final state, merging all years. Top row: 4$ \mu $ and 4e; bottom row: 2e2$ \mu $ and 2$ \mu $2e. $ \sigma^{68\%} $, defined as the Gaussian width used to fit the smallest invariant mass window containing 68% of the signal event, is also shown. |
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Additional Figure 1-d:
Comparison of the four-lepton invariant mass line shape with (red) and without (blue) the beam spot contraint, split per final state, merging all years. Top row: 4$ \mu $ and 4e; bottom row: 2e2$ \mu $ and 2$ \mu $2e. $ \sigma^{68\%} $, defined as the Gaussian width used to fit the smallest invariant mass window containing 68% of the signal event, is also shown. |
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Additional Figure 2:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
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Additional Figure 2-a:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
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Additional Figure 2-b:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 2-c:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 2-d:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 2-e:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 2-f:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 2-g:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 2-h:
Difference between data and simulation in $ Z(J/\psi) \rightarrow 2\ell $, normalized to simulation, as a function of $ p_{\mathrm{T}} $ and $ |\eta| $ for muons (left) and electron (right), regardless of the second lepton. From top to bottom: 2018, 2017, 2016 pre- and post-VFP. |
png pdf |
Additional Figure 3:
The observed (expected) likelihood scan as a function of $ m_{\mathrm{H}} $ is shown in black (red) using the $ \mathcal{N}-2D'_\text{VXBS} $ approach. The scans are shown both with (solid line) and without (dashed line) systematic uncertainties. Expected likelihood has been obtained with the hypothesis $ m_\mathrm{H} = $ 125.38 GeV and then shifted towards the observed central value of 125.04 GeV. |
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Additional Figure 4:
Observed (solid) and expected (dashed) profile likelihood projection on the H boson width using the on-shell and off-shell production. The analysis of $ \mathrm{H}\to4\ell $ off-shell combined with the $ \mathrm{H}\to4\ell $ on-shell channel is shown in black and the full combination of $ \mathrm{H}\to4\ell $ on-shell and off-shell with $ \mathrm{H}\to2\ell2\nu $ off-shell is shown in red. The zero off-shell H production hypothesis is excluded at a 3.9 standard deviations confidence level. |
| Additional Tables | |
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Additional Table 1:
Features of the different approaches used in the on-shell analysis. |
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