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Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in $\sqrt{s}$ = 13 TeV $pp$ collisions with the ATLAS detector

The collaboration
Phys.Rev.D 97 (2018) 052012, 2018.

Abstract (data abstract)
CERN-LHC. A search for long-lived, massive particles predicted by many theories beyond the Standard Model is presented. The search targets final states with large missing transverse momentum and at least one high-mass displaced vertex with five or more tracks, and uses 32.8 fb$^{-1}$ of $\sqrt{s} = 13$ TeV $pp$ collision data collected by the ATLAS detector at the LHC. The observed yield is consistent with the expected background. The results are used to extract 95% CL exclusion limits on the production of long-lived gluinos with masses up to 2.37 TeV and lifetimes of $\mathcal{O}(10^{-2})\text{--}\mathcal{O}(10)$ ns in a simplified model inspired by Split Supersymmetry.

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Data from Figure 2a

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Vertex reconstruction efficiency as a function of radial position $R$ with and without the special LRT processing for one $R$-hadron...

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Data from Figure 2b

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Vertex reconstruction efficiency as a function of radial position $R$ for two $R$-hadron signal samples with $m_{\tilde{g}} = 1.2$ TeV,...

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Data from Figure 4a

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Fractions of selected events for several signal MC samples with a gluino lifetime $\tau = 1$ ns, illustrating how $\mathcal{A}\times\varepsilon$...

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Data from Figure 4b

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Fractions of selected events for several signal MC samples with a mass difference $\Delta m = 100$ GeV, illustrating how...

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Data from Figure 7a

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Two-dimensional distribution of $m_{\mathrm{DV}}$ and track multiplicity for DVs in data events and events of a $R$-hadron signal sample with...

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Data from Figure 7b

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Two-dimensional distribution of $m_{\mathrm{DV}}$ and track multiplicity for DVs in data events and events of a $R$-hadron signal sample with...

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Data from Figure 8a

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Upper 95% CL limits on the signal cross section for $m_{\tilde{g}}=1.4$ TeV and fixed $m_{\tilde{\chi}_{1}^{0}}=100$ GeV as a function of...

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Data from Figure 8a

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Upper 95% CL limits on the signal cross section for $m_{\tilde{g}}=2.0$ TeV and fixed $m_{\tilde{\chi}_{1}^{0}}=100$ GeV as a function of...

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Data from Figure 8b

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Lower 95% CL limits on $m_{\tilde{g}}$ for fixed $m_{\tilde{\chi}_{1}^{0}}=100$ GeV as a function of lifetime $\tau$.

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Data from Figure 9a

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Upper 95% CL limits on the signal cross section for $m_{\tilde{g}}=1.4$ TeV and fixed $\Delta m=100$ GeV as a function...

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Data from Figure 9a

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Upper 95% CL limits on the signal cross section for $m_{\tilde{g}}=2.0$ TeV and fixed $\Delta m=100$ GeV as a function...

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Data from Figure 9b

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Lower 95% CL limit on $m_{\tilde{g}}$ for fixed $\Delta m=100$ GeV as a function of lifetime $\tau$.

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Data from Figure 10a

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Upper 95% CL limits on the signal cross section for $m_{\tilde{g}}=1.4$ TeV and fixed $\tau=1$ ns as a function of...

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Data from Figure 10a

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Upper 95% CL limits on the signal cross section for $m_{\tilde{g}}=2.0$ TeV and fixed $\tau=1$ ns as a function of...

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Data from Figure 10b

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Observed 95% CL limit as a function of $m_{\tilde{g}}$ and $m_{\tilde{\chi}_{1}^{0}}$ for fixed $\tau=1$ ns.

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Data from Figure 17b

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Two-dimensional distributions of $x$-$y$ positions of vertices observed in the data passing the vertex pre-selection and satisfying all signal region...

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Data from Figure 18a

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Data from Figure 19a

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Observed cross section upper 95% CL limits as a function of $m_{\tilde{g}}$ and $\tau$ for $m_{\tilde{\chi}_{1}^{0}}=100$ GeV. For the mass...

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Data from Figure 19b

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Observed cross section upper 95% CL limits as a function of $m_{\tilde{g}}$ and $\tau$ for $\Delta m=100$ GeV. For the...

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Data from Figure 19c

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Observed cross section upper 95% CL limits as a function of $m_{\tilde{\chi}_{1}^{0}}$ and $m_{\tilde{g}}$ for $\tau = 1$ ns. For...

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Data from Figure 20a

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Parameterized event selection efficiencies as a function of truth MET for events which have all truth decay vertices occurring before...

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Data from Figure 20b

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Parameterized event selection efficiencies as a function of truth MET for events which have the furthest truth decay occurring inside...

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Data from Figure 20c

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Parameterized event selection efficiencies as a function of truth MET for events which have the furthest truth decay occurring after...

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Data from Figure 21a

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 21b

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 21c

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 21d

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 21e

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 21f

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 22a

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 22b

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 22c

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 22d

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 22e

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

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Data from Figure 22f

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Parameterized vertex level efficiencies as a function of number of particles associated to a truth decay vertex, and the vertex...

Version 2 modifications: Using standard table names ("Table 1", "Table 2", ...) because the custom table names caused some issues and prevented downloads in JSON format.