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| CMS-PAS-EXO-21-015 | ||
| Search for a neutral gauge boson with non-universal fermion couplings in vector boson fusion processes in proton-proton collisions at $ \sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| 4 June 2024 | ||
| Abstract: The first search for a heavy neutral spin-1 gauge boson (Z') produced via vector boson fusion processes is presented. The analysis considers scenarios in which the Z' boson has non-universal fermion couplings, favoring higher-generation fermions. This offers a new physics phase space not yet fully explored at the LHC. The analysis is performed using LHC data at $ \sqrt{s}= $ 13 TeV, collected from 2016 to 2018, corresponding to an integrated luminosity of 138 fb$ ^{-1} $. The data are consistent with the standard model expectation. Upper limits are set on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $ or WW. Masses below 2.45 TeV are excluded, depending on the Z' coupling to weak bosons. | ||
| Links: CDS record (PDF) ; CADI line (restricted) ; | ||
| Figures | Summary | Additional Figures | References | CMS Publications |
|---|
| Figures | |
png pdf |
Figure 1:
Observed $ m(\ell_{1},\ell_{2},p_{\mathrm{T}}^\text{miss}) $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mu\tau_\mathrm{h} $ (upper left), $ \tau_\mathrm{h}\tau_\mathrm{h} $ (upper right), $ \mathrm{e}\tau_\mathrm{h} $ (lower left), and $ \mathrm{e}\mu $ (lower right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The gray band in the lower panels indicates the systematic component of the post-fit uncertainty. The dashed lines correspond to the signal expectation, for Z' masses of 1 TeV (black) and 2.5 TeV (magenta) decaying to $ \tau^{+}\tau^{-} $, normalized to 199.4 fb and 0.7504 fb respectively. The dashed brown line corresponds to Z' mass of 1.25 TeV decaying to $ \mathrm{W^+}\mathrm{W^-} $, normalized to 61.14 fb. |
png pdf |
Figure 1-a:
Observed $ m(\ell_{1},\ell_{2},p_{\mathrm{T}}^\text{miss}) $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mu\tau_\mathrm{h} $ (upper left), $ \tau_\mathrm{h}\tau_\mathrm{h} $ (upper right), $ \mathrm{e}\tau_\mathrm{h} $ (lower left), and $ \mathrm{e}\mu $ (lower right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The gray band in the lower panels indicates the systematic component of the post-fit uncertainty. The dashed lines correspond to the signal expectation, for Z' masses of 1 TeV (black) and 2.5 TeV (magenta) decaying to $ \tau^{+}\tau^{-} $, normalized to 199.4 fb and 0.7504 fb respectively. The dashed brown line corresponds to Z' mass of 1.25 TeV decaying to $ \mathrm{W^+}\mathrm{W^-} $, normalized to 61.14 fb. |
png pdf |
Figure 1-b:
Observed $ m(\ell_{1},\ell_{2},p_{\mathrm{T}}^\text{miss}) $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mu\tau_\mathrm{h} $ (upper left), $ \tau_\mathrm{h}\tau_\mathrm{h} $ (upper right), $ \mathrm{e}\tau_\mathrm{h} $ (lower left), and $ \mathrm{e}\mu $ (lower right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The gray band in the lower panels indicates the systematic component of the post-fit uncertainty. The dashed lines correspond to the signal expectation, for Z' masses of 1 TeV (black) and 2.5 TeV (magenta) decaying to $ \tau^{+}\tau^{-} $, normalized to 199.4 fb and 0.7504 fb respectively. The dashed brown line corresponds to Z' mass of 1.25 TeV decaying to $ \mathrm{W^+}\mathrm{W^-} $, normalized to 61.14 fb. |
png pdf |
Figure 1-c:
Observed $ m(\ell_{1},\ell_{2},p_{\mathrm{T}}^\text{miss}) $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mu\tau_\mathrm{h} $ (upper left), $ \tau_\mathrm{h}\tau_\mathrm{h} $ (upper right), $ \mathrm{e}\tau_\mathrm{h} $ (lower left), and $ \mathrm{e}\mu $ (lower right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The gray band in the lower panels indicates the systematic component of the post-fit uncertainty. The dashed lines correspond to the signal expectation, for Z' masses of 1 TeV (black) and 2.5 TeV (magenta) decaying to $ \tau^{+}\tau^{-} $, normalized to 199.4 fb and 0.7504 fb respectively. The dashed brown line corresponds to Z' mass of 1.25 TeV decaying to $ \mathrm{W^+}\mathrm{W^-} $, normalized to 61.14 fb. |
png pdf |
Figure 1-d:
Observed $ m(\ell_{1},\ell_{2},p_{\mathrm{T}}^\text{miss}) $ for the data, and the post-fit backgrounds (stacked histograms), in the signal region for $ \mu\tau_\mathrm{h} $ (upper left), $ \tau_\mathrm{h}\tau_\mathrm{h} $ (upper right), $ \mathrm{e}\tau_\mathrm{h} $ (lower left), and $ \mathrm{e}\mu $ (lower right) channels. The lower panels show ratios of the data to the pre-fit background prediction and post-fit background yield as red open squares and blue points, respectively. The gray band in the lower panels indicates the systematic component of the post-fit uncertainty. The dashed lines correspond to the signal expectation, for Z' masses of 1 TeV (black) and 2.5 TeV (magenta) decaying to $ \tau^{+}\tau^{-} $, normalized to 199.4 fb and 0.7504 fb respectively. The dashed brown line corresponds to Z' mass of 1.25 TeV decaying to $ \mathrm{W^+}\mathrm{W^-} $, normalized to 61.14 fb. |
png pdf |
Figure 2:
Combined 95% CL upper limits on $ m({\mathrm{Z}^{'}} ) $ as a function of Z' branching fraction to $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 0 scenario (upper left), $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 1 scenario (upper right), $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 0 scenario (lower left), and $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 1 scenario (lower right). The red, green and blue curves correspond to $ \kappa_{\mathrm{V}} $ equal to 0.1, 0.5 and 1 respectively. |
png pdf |
Figure 2-a:
Combined 95% CL upper limits on $ m({\mathrm{Z}^{'}} ) $ as a function of Z' branching fraction to $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 0 scenario (upper left), $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 1 scenario (upper right), $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 0 scenario (lower left), and $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 1 scenario (lower right). The red, green and blue curves correspond to $ \kappa_{\mathrm{V}} $ equal to 0.1, 0.5 and 1 respectively. |
png pdf |
Figure 2-b:
Combined 95% CL upper limits on $ m({\mathrm{Z}^{'}} ) $ as a function of Z' branching fraction to $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 0 scenario (upper left), $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 1 scenario (upper right), $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 0 scenario (lower left), and $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 1 scenario (lower right). The red, green and blue curves correspond to $ \kappa_{\mathrm{V}} $ equal to 0.1, 0.5 and 1 respectively. |
png pdf |
Figure 2-c:
Combined 95% CL upper limits on $ m({\mathrm{Z}^{'}} ) $ as a function of Z' branching fraction to $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 0 scenario (upper left), $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 1 scenario (upper right), $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 0 scenario (lower left), and $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 1 scenario (lower right). The red, green and blue curves correspond to $ \kappa_{\mathrm{V}} $ equal to 0.1, 0.5 and 1 respectively. |
png pdf |
Figure 2-d:
Combined 95% CL upper limits on $ m({\mathrm{Z}^{'}} ) $ as a function of Z' branching fraction to $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 0 scenario (upper left), $ \tau^{+}\tau^{-} $ for the $ g_{\ell} = $ 1 scenario (upper right), $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 0 scenario (lower left), and $ \mathrm{W^+}\mathrm{W^-} $ for the $ g_{\ell} = $ 1 scenario (lower right). The red, green and blue curves correspond to $ \kappa_{\mathrm{V}} $ equal to 0.1, 0.5 and 1 respectively. |
| Summary |
| In summary, a search for a heavy neutral spin-1 gauge boson (Z') produced via vector boson fusion processes has been performed for the first time using data collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb$^{-1}$. This is the first ever search for Z' produced through vector boson fusion performed at the LHC. The search considers non-universal couplings (NUC) of Z' bosons to fermions, including scenarios with dominant couplings to third-generation fermions. Theoretical models aiming to explain B-meson anomalies in the $ R_{D^{*}} $ ratios [68,69,70,71,72,73] often include associated production of Z' and W' bosons with NUC [74,75]. Therefore, this search serves as an indirect probe to bound the available phase space for these models. Two decay channels, $ {\mathrm{Z}^{'}} \to\tau^{+}\tau^{-} $ and $ {\mathrm{Z}^{'}} \to\mathrm{W^+}\mathrm{W^-} $, are considered, motivated by recent anomalies in the precision measurements of B meson decays. The invariant mass of the dilepton plus missing transverse momentum is used to search for the presence of signal as a broad enhancement above the background expectation. The data do not reveal evidence for new physics. In Z' models with non-universal fermion couplings, in particular models with Z' bosons that exhibit enhanced couplings to third-generation fermions, the presence of Z' bosons decaying to a tau lepton (W boson) pair is excluded for Z' masses up to 2.45 TeV (1.5 TeV), depending on the Z' coupling to SM weak bosons, resulting in the most stringent limits on these models to date. |
| Additional Figures | |
png pdf |
Additional Figure 2:
The cumulative efficiency of the signal region selections in the $ \mu\tau_\mathrm{h} $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 2-a:
The cumulative efficiency of the signal region selections in the $ \mu\tau_\mathrm{h} $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 2-b:
The cumulative efficiency of the signal region selections in the $ \mu\tau_\mathrm{h} $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 3:
The cumulative efficiency of the signal region selections in the $ \mathrm{e}\tau_\mathrm{h} $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 3-a:
The cumulative efficiency of the signal region selections in the $ \mathrm{e}\tau_\mathrm{h} $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 3-b:
The cumulative efficiency of the signal region selections in the $ \mathrm{e}\tau_\mathrm{h} $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 4:
The cumulative efficiency of the signal region selections in the $ \mathrm{e}\mu $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 4-a:
The cumulative efficiency of the signal region selections in the $ \mathrm{e}\mu $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 4-b:
The cumulative efficiency of the signal region selections in the $ \mathrm{e}\mu $ channel, for the VBF $ \mathrm{Z'}\to\tau\tau $ (left) and $ \mathrm{Z'}\to\mathrm{WW} $ (right) signal models with $ \kappa_{\mathrm{V}} = $ 1.0, as a function of Z' mass. The red curve represents the $ g_{\ell} = $ 0, $ g_{\text{h}} = $ 1 scenario, and the blue curve represents the $ g_{\ell} = g_{\text{h}} = $ 1 scenario. Each value is computed as the ratio of the number of simulated signal events passing all selection criteria to the total number of simulated signal events. |
png pdf |
Additional Figure 5:
The reconstructed Z' mass distribution $ m(\ell,\ell,p_{\mathrm{T}}^{\text{miss}}) $ in the $ \tau_\mathrm{h} \tau_\mathrm{h} $ (top left), $ \mu\tau_\mathrm{h} $ (top right), $ \mathrm{e}\tau_\mathrm{h} $ (bottom left), and $ \mathrm{e}\mu $ (bottom right) channels for simulated VBF $ \mathrm{Z'}\to\tau\tau $ benchmark signal samples with $ m(\mathrm{Z'}) = $ 0.25, 0.5, 1.5, and 2.5 TeV. |
png pdf |
Additional Figure 5-a:
The reconstructed Z' mass distribution $ m(\ell,\ell,p_{\mathrm{T}}^{\text{miss}}) $ in the $ \tau_\mathrm{h} \tau_\mathrm{h} $ (top left), $ \mu\tau_\mathrm{h} $ (top right), $ \mathrm{e}\tau_\mathrm{h} $ (bottom left), and $ \mathrm{e}\mu $ (bottom right) channels for simulated VBF $ \mathrm{Z'}\to\tau\tau $ benchmark signal samples with $ m(\mathrm{Z'}) = $ 0.25, 0.5, 1.5, and 2.5 TeV. |
png pdf |
Additional Figure 5-b:
The reconstructed Z' mass distribution $ m(\ell,\ell,p_{\mathrm{T}}^{\text{miss}}) $ in the $ \tau_\mathrm{h} \tau_\mathrm{h} $ (top left), $ \mu\tau_\mathrm{h} $ (top right), $ \mathrm{e}\tau_\mathrm{h} $ (bottom left), and $ \mathrm{e}\mu $ (bottom right) channels for simulated VBF $ \mathrm{Z'}\to\tau\tau $ benchmark signal samples with $ m(\mathrm{Z'}) = $ 0.25, 0.5, 1.5, and 2.5 TeV. |
png pdf |
Additional Figure 5-c:
The reconstructed Z' mass distribution $ m(\ell,\ell,p_{\mathrm{T}}^{\text{miss}}) $ in the $ \tau_\mathrm{h} \tau_\mathrm{h} $ (top left), $ \mu\tau_\mathrm{h} $ (top right), $ \mathrm{e}\tau_\mathrm{h} $ (bottom left), and $ \mathrm{e}\mu $ (bottom right) channels for simulated VBF $ \mathrm{Z'}\to\tau\tau $ benchmark signal samples with $ m(\mathrm{Z'}) = $ 0.25, 0.5, 1.5, and 2.5 TeV. |
png pdf |
Additional Figure 5-d:
The reconstructed Z' mass distribution $ m(\ell,\ell,p_{\mathrm{T}}^{\text{miss}}) $ in the $ \tau_\mathrm{h} \tau_\mathrm{h} $ (top left), $ \mu\tau_\mathrm{h} $ (top right), $ \mathrm{e}\tau_\mathrm{h} $ (bottom left), and $ \mathrm{e}\mu $ (bottom right) channels for simulated VBF $ \mathrm{Z'}\to\tau\tau $ benchmark signal samples with $ m(\mathrm{Z'}) = $ 0.25, 0.5, 1.5, and 2.5 TeV. |
png pdf |
Additional Figure 6:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 6-a:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 6-b:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 6-c:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 6-d:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 7:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 7-a:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 7-b:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 7-c:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 7-d:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \tau\tau $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 8:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 8-a:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 8-b:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 8-c:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 8-d:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 0 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 9:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 9-a:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 9-b:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 9-c:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
png pdf |
Additional Figure 9-d:
The combined 95% confidence level expected and observed upper limits on the product of the Z' cross section and the branching fraction for a Z' boson decaying to $ \mathrm{WW} $, as a function of Z' mass and assuming $ g_{\ell} = $ 1 and $ \kappa_{\mathrm{V}} = $ 0.1 (top left), 0.25 (top right), 0.5 (bottom left), and 1.0 (bottom right). |
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