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| CMS-HIG-17-033 ; CERN-EP-2019-230 | ||
| Search for a heavy Higgs boson decaying to a pair of W bosons in proton-proton collisions at $\sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 3 December 2019 | ||
| JHEP 03 (2020) 034 | ||
| Abstract: A search for a heavy Higgs boson in the mass range from 0.2 to 3.0 TeV, decaying to a pair of W bosons, is presented. The analysis is based on proton-proton collisions at $\sqrt{s} = $ 13 TeV recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The W boson pair decays are reconstructed in the ${2\ell 2\nu}$ and $ {\ell\nu 2\mathrm{q}}$ final states (with $\ell = $ e or $\mu$). Both gluon fusion and vector boson fusion production of the signal are considered. Interference effects between the signal and background are also taken into account. The observed data are consistent with the standard model (SM) expectation. Combined upper limits at 95% confidence level on the product of the cross section and branching fraction exclude a heavy Higgs boson with SM-like couplings and decays up to 1870 GeV. Exclusion limits are also set in the context of a number of two-Higgs-doublet model formulations, further reducing the allowed parameter space for SM extensions. | ||
| Links: e-print arXiv:1912.01594 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; CADI line (restricted) ; | ||
| Figures | |
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Figure 1:
Generator-level mass of a ggF-produced 700 GeV signal (black line) normalized to the SM cross section. The effects of the interference of the signal with the ${\mathrm{g} \mathrm{g} {\to} {{\mathrm{W}} {\mathrm{W}}}}$ continuum and the ${\mathrm{g} \mathrm{g} {\to} {\mathrm{h} (125)}}$ off-shell tail are shown, together with the total interference effect. |
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Figure 2:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 2-a:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 2-b:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 2-c:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 2-d:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 2-e:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 2-f:
The ${m_\text {reco}}$ distributions in the ${2\ell 2\nu}$ different- (upper and middle) and same-flavour (lower) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 400 and 1500 GeV, normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 3:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 3-a:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 3-b:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 3-c:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 3-d:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 3-e:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 3-f:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after performing a background-only fit with the dominant background normalizations determined using control regions. Electron and muon channels are combined. The points represent the data and the stacked histograms the expected backgrounds. Also shown are the sum of the expected ggF- and VBF-produced signals for $ {m_{\mathrm{X}}} = $ 800 and 1500 GeV (left), and $ {m_{\mathrm{X}}} = $ 400 and 600 GeV (right), normalized to the SM cross sections, and without considering interference effects. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4-a:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4-b:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4-c:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4-d:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4-e:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 4-f:
The ${m_\text {reco}}$ distributions in the top quark control regions of the ${2\ell 2\nu}$ different-flavour categories (upper and middle) and the DY control regions of the ${2\ell 2\nu}$ same-flavour categories (lower). The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_\text {reco}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 5:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
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Figure 5-a:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 5-b:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 5-c:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 5-d:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 5-e:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 5-f:
The ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ distributions in the sideband control regions of the ${\ell \nu 2\mathrm{q}}$ boosted (left) and resolved (right) categories, after fitting the sideband data with the top quark background normalization determined using a control region. Electron and muon channels are combined. The points represent the data and the stacked histograms show the expected backgrounds. The hatched area shows the combined statistical and systematic uncertainties in the background estimation. Lower panels show the ratio of data to expected background. Larger bin widths are used at higher ${m_{{{\mathrm{W}} {\mathrm{W}}}}}$ ; the bin widths are indicated by the horizontal error bars. |
png pdf |
Figure 6:
Expected and observed exclusion limits at 95% CL on the X cross section times branching fraction to WW for a number of ${f_\text {VBF}}$ hypotheses. For the SM ${f_\text {VBF}}$ (upper left) and floating ${f_\text {VBF}}$ (upper right) cases the red line represents the sum of the SM cross sections for ggF and VBF production, while for the $ {f_\text {VBF}} = $ 0 (lower left) and the $ {f_\text {VBF}} = $ 1 (lower right) cases it represents the ggF and VBF production cross sections, respectively. The black dotted line corresponds to the central expected value while the yellow and green bands represent the 68 and 95% CL uncertainties, respectively. |
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Figure 6-a:
Expected and observed exclusion limits at 95% CL on the X cross section times branching fraction to WW for a number of ${f_\text {VBF}}$ hypotheses. For the SM ${f_\text {VBF}}$ (upper left) and floating ${f_\text {VBF}}$ (upper right) cases the red line represents the sum of the SM cross sections for ggF and VBF production, while for the $ {f_\text {VBF}} = $ 0 (lower left) and the $ {f_\text {VBF}} = $ 1 (lower right) cases it represents the ggF and VBF production cross sections, respectively. The black dotted line corresponds to the central expected value while the yellow and green bands represent the 68 and 95% CL uncertainties, respectively. |
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Figure 6-b:
Expected and observed exclusion limits at 95% CL on the X cross section times branching fraction to WW for a number of ${f_\text {VBF}}$ hypotheses. For the SM ${f_\text {VBF}}$ (upper left) and floating ${f_\text {VBF}}$ (upper right) cases the red line represents the sum of the SM cross sections for ggF and VBF production, while for the $ {f_\text {VBF}} = $ 0 (lower left) and the $ {f_\text {VBF}} = $ 1 (lower right) cases it represents the ggF and VBF production cross sections, respectively. The black dotted line corresponds to the central expected value while the yellow and green bands represent the 68 and 95% CL uncertainties, respectively. |
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Figure 6-c:
Expected and observed exclusion limits at 95% CL on the X cross section times branching fraction to WW for a number of ${f_\text {VBF}}$ hypotheses. For the SM ${f_\text {VBF}}$ (upper left) and floating ${f_\text {VBF}}$ (upper right) cases the red line represents the sum of the SM cross sections for ggF and VBF production, while for the $ {f_\text {VBF}} = $ 0 (lower left) and the $ {f_\text {VBF}} = $ 1 (lower right) cases it represents the ggF and VBF production cross sections, respectively. The black dotted line corresponds to the central expected value while the yellow and green bands represent the 68 and 95% CL uncertainties, respectively. |
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Figure 6-d:
Expected and observed exclusion limits at 95% CL on the X cross section times branching fraction to WW for a number of ${f_\text {VBF}}$ hypotheses. For the SM ${f_\text {VBF}}$ (upper left) and floating ${f_\text {VBF}}$ (upper right) cases the red line represents the sum of the SM cross sections for ggF and VBF production, while for the $ {f_\text {VBF}} = $ 0 (lower left) and the $ {f_\text {VBF}} = $ 1 (lower right) cases it represents the ggF and VBF production cross sections, respectively. The black dotted line corresponds to the central expected value while the yellow and green bands represent the 68 and 95% CL uncertainties, respectively. |
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Figure 7:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{H}}}$ for a Type-I (left) and Type-II (right) 2HDMs. It is assumed that $ {m_{\mathrm{H}}} = {m_{\mathrm{A} }} $ and $ {\cos(\beta -\alpha)} = $ 0.1. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
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Figure 7-a:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{H}}}$ for a Type-I (left) and Type-II (right) 2HDMs. It is assumed that $ {m_{\mathrm{H}}} = {m_{\mathrm{A} }} $ and $ {\cos(\beta -\alpha)} = $ 0.1. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
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Figure 7-b:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{H}}}$ for a Type-I (left) and Type-II (right) 2HDMs. It is assumed that $ {m_{\mathrm{H}}} = {m_{\mathrm{A} }} $ and $ {\cos(\beta -\alpha)} = $ 0.1. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
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Figure 8:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${m_{{\mathrm{h}}}^\text {mod+}}$ (left) and hMSSM (right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
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Figure 8-a:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${m_{{\mathrm{h}}}^\text {mod+}}$ (left) and hMSSM (right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
png pdf |
Figure 8-b:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${m_{{\mathrm{h}}}^\text {mod+}}$ (left) and hMSSM (right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
png pdf |
Figure 9:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${M_{{\mathrm{h}}}^{125}}$ (upper left), ${M_{{\mathrm{h}}}^{125}\text {(alignment)}}$ (upper right), ${M_{{\mathrm{h}}}^{125}(\tilde{\chi})}$ (lower left), and ${M_{{\mathrm{h}}}^{125}(\tilde{\tau})}$ (lower right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
png pdf |
Figure 9-a:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${M_{{\mathrm{h}}}^{125}}$ (upper left), ${M_{{\mathrm{h}}}^{125}\text {(alignment)}}$ (upper right), ${M_{{\mathrm{h}}}^{125}(\tilde{\chi})}$ (lower left), and ${M_{{\mathrm{h}}}^{125}(\tilde{\tau})}$ (lower right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
png pdf |
Figure 9-b:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${M_{{\mathrm{h}}}^{125}}$ (upper left), ${M_{{\mathrm{h}}}^{125}\text {(alignment)}}$ (upper right), ${M_{{\mathrm{h}}}^{125}(\tilde{\chi})}$ (lower left), and ${M_{{\mathrm{h}}}^{125}(\tilde{\tau})}$ (lower right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
png pdf |
Figure 9-c:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${M_{{\mathrm{h}}}^{125}}$ (upper left), ${M_{{\mathrm{h}}}^{125}\text {(alignment)}}$ (upper right), ${M_{{\mathrm{h}}}^{125}(\tilde{\chi})}$ (lower left), and ${M_{{\mathrm{h}}}^{125}(\tilde{\tau})}$ (lower right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
png pdf |
Figure 9-d:
Expected and observed 95% CL upper limits on ${\tan\beta}$ as a function of ${m_{\mathrm{A} }}$ for the ${M_{{\mathrm{h}}}^{125}}$ (upper left), ${M_{{\mathrm{h}}}^{125}\text {(alignment)}}$ (upper right), ${M_{{\mathrm{h}}}^{125}(\tilde{\chi})}$ (lower left), and ${M_{{\mathrm{h}}}^{125}(\tilde{\tau})}$ (lower right) scenarios. The expected limit is shown as a dashed black line while the dark and light gray bands indicate the 68 and 95% CL uncertainties, respectively. The observed exclusion contour is indicated by the blue area. |
| Tables | |
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Table 1:
Summary of systematic uncertainties, quoted in percent, affecting the normalization of the background and signal samples. The uncertainties on the WW, top quark and DY (W+jets and top quark) background estimates in the ${2\ell 2\nu}$ (${\ell \nu 2\mathrm{q}}$) categories have been determined during the fit to the data. The numbers shown as ranges represent the uncertainties for different processes and categories. Missing values represent uncertainties either estimated to be negligible ($ < $0.1%), or not applicable in a specific channel. Those systematic uncertainties found to affect the shape of kinematic distributions are labeled with *. |
| Summary |
| A search for a heavy Higgs boson decaying to a pair of W bosons in the mass range from 0.2 to 3.0 TeV has been presented. The data analysed were collected by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb$^{-1}$ at $\sqrt{s} = $ 13 TeV. The W boson pair decays are reconstructed in the ${2\ell 2\nu}$ and $ {\ell\nu 2\mathrm{q}}$ final states. Both gluon fusion and vector boson fusion production of the signal are considered, with a number of hypotheses for their relative contributions investigated. Interference effects between the signal and background are also taken into account. Dedicated event categorizations based on both the kinematic properties of associated jets and matrix element techniques are employed to optimize the signal sensitivity. No evidence for an excess of events with respect to the standard model (SM) predictions is observed. Combined upper limits at 95% confidence level on the product of the cross section and branching fraction exclude a heavy Higgs boson with SM-like couplings and decays up to 1870 GeV. Exclusion limits are also set in the context of a number of two-Higgs-doublet model formulations, further reducing the allowed parameter space for extensions of the SM. |
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