CMS-PAS-FTR-21-003 | ||
Prospects for HH measurements in the WW$\gamma\gamma$ and $\tau\tau\gamma\gamma$ final states in proton-proton collisions at $\sqrt{s}=$ 14 TeV at the High Luminosity-LHC | ||
CMS Collaboration | ||
March 2022 | ||
Abstract: Prospects for nonresonant Higgs boson pair production measurements in the WW$\gamma\gamma$ and $\tau\tau\gamma\gamma$ final states in proton-proton collisions at a centre-of-mass energy of 14 TeV with the upgraded Phase-2 CMS detector at the High-Luminosity LHC (HL-LHC) are presented. The study is performed using generated events that passed DELPHES fast simulation of the CMS detector with an average of 200 proton-proton interactions per bunch crossing and an integrated luminosity of 3000 fb$^{-1}$. | ||
Links: CDS record (PDF) ; CADI line (restricted) ; |
Figures | |
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Figure 1:
Feynman diagrams for leading order Higgs boson pair production via gluon fusion. |
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Figure 1-a:
Feynman diagrams for leading order Higgs boson pair production via gluon fusion. |
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Figure 1-b:
Feynman diagrams for leading order Higgs boson pair production via gluon fusion. |
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Figure 2:
DNN output scores in the one lepton (left) and one tau (right) final states. |
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Figure 2-a:
DNN output scores in the one lepton (left) and one tau (right) final states. |
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Figure 2-b:
DNN output scores in the one lepton (left) and one tau (right) final states. |
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Figure 3:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (left) and ${\tau \tau \gamma \gamma}$, 1$\tau $ (right) final states. |
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Figure 3-a:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (left) and ${\tau \tau \gamma \gamma}$, 1$\tau $ (right) final states. |
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Figure 3-b:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (left) and ${\tau \tau \gamma \gamma}$, 1$\tau $ (right) final states. |
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Figure 4:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states. |
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Figure 4-a:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states. |
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Figure 4-b:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states. |
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Figure 4-c:
$m_{\gamma \gamma}$ distributions in the WW$\gamma \gamma$, 1L (top left), 2L (top right) and {\tau \tau \gamma \gamma}, 2$\tau $s (bottom) final states. |
Tables | |
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Table 1:
One Lepton final state DNN score categories. |
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Table 2:
Selection criteria of the Two Lepton Channel. |
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Table 3:
Experimental uncertainties considered in this study. |
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Table 4:
Theoretical uncertainties considered on the ggHH signal and single Higgs processes. |
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Table 5:
Expected HL-LHC significances ($\sigma $) results of the WW$\gamma \gamma $ and ${\tau \tau \gamma \gamma}$ processes with their combination. |
Summary |
A measurement of non-resonant Higgs boson pair production in the WW$\gamma\gamma$ and ${\tau\tau\gamma\gamma}$ final states was performed in simulated proton-proton collision events at a centre-of-mass energy of 14 TeV and integrated luminosity of 3000 fb$^{-1}$ at the HL-LHC. Combining all final state categories and including systematic uncertainties, an expected significance 0.22$\sigma$ for signal is measured. |
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Compact Muon Solenoid LHC, CERN |
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