cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.131523.v1/t12
title: "Table 12" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: Observed 95% CL upper limits on the branching ratio (B) for the decay H→ 2γ<sub>d</sub> and ggF selection, for different γ<sub>d</sub> masses and a 125 GeV Higgs boson. The limits are shown for the SR<sub>c+μ</sub><sup>ggF</sup>, assuming a HAHM signal model. The hatched band denotes the region in which the branching ratio of H→ 2γ<sub>d</sub> is larger than unity.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t13
title: "Table 13" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: Observed 95% CL upper limits on the branching ratio (B) for the decay H→ 2γ<sub>d</sub> and ggF selection, for different γ<sub>d</sub> masses and a 125 GeV Higgs boson. The limits are shown for the SR<sub>2c</sub><sup>ggF</sup>, assuming a HAHM signal model. The hatched band denotes the region in which the branching ratio of H→ 2γ<sub>d</sub> is larger than unity.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t14
title: "Table 14" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The CalRatio 2015--2016 trigger efficiency for the decay of γ<sub>d</sub> in e<sup>+</sup>e<sup>-</sup> or qq̄. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse decay length L<sub>xy</sub>.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t15
title: "Table 15" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The CalRatio 2015--2016 trigger efficiency for the decay of γ<sub>d</sub> in e<sup>+</sup>e<sup>-</sup> or qq̄. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse momentum, in events where the γ<sub>d</sub> L<sub>xy</sub> is between 2 m and 4 m.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t16
title: "Table 16" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The CalRatio 2017--2018 trigger efficiency for the decay of γ<sub>d</sub> in e<sup>+</sup>e<sup>-</sup> or qq̄. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse decay length L<sub>xy</sub>.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t8
title: "Table 8" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: Observed 95% CL upper limits on the branching ratio (B) for the decay H→ 2γ<sub>d</sub>+X and WH selection, for different γ<sub>d</sub> masses and a 125 GeV Higgs boson. The limits are shown for the SR<sub>c</sub><sup>WH</sup>, assuming an FRVZ signal model. The hatched band denotes the region in which the branching ratio of H→ 2γ<sub>d</sub>+X is larger than unity.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t9
title: "Table 9" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: Observed 95% CL upper limits on the branching ratio (B) for the decay H→ 2γ<sub>d</sub>+X and WH selection, for different γ<sub>d</sub> masses and a 125 GeV Higgs boson. The limits are shown for the SR<sub>c+μ</sub><sup>WH</sup>, assuming an FRVZ signal model. The hatched band denotes the region in which the branching ratio of H→ 2γ<sub>d</sub>+X is larger than unity.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t17
title: "Table 17" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The CalRatio 2017--2018 trigger efficiency for the decay of γ<sub>d</sub> in e<sup>+</sup>e<sup>-</sup> or qq̄. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse momentum, in events where the γ<sub>d</sub> L<sub>xy</sub> is between 2 m and 4 m.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t18
title: "Table 18" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The narrow-scan 2015--2016 trigger efficiency for the decay of γ<sub>d</sub> in μ<sup>+</sup>μ<sup>-</sup>. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse decay length L<sub>xy</sub>.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t19
title: "Table 19" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The narrow-scan 2015--2016 trigger efficiency for the decay of γ<sub>d</sub> in μ<sup>+</sup>μ<sup>-</sup>. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse momentum, in events where the γ<sub>d</sub> L<sub>xy</sub> is below 6 m.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t20
title: "Table 20" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The narrow-scan 2017--2018 trigger efficiency for the decay of γ<sub>d</sub> in μ<sup>+</sup>μ<sup>-</sup>. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse decay length L<sub>xy</sub>.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t21
title: "Table 21" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: The narrow-scan 2017--2018 trigger efficiency for the decay of γ<sub>d</sub> in μ<sup>+</sup>μ<sup>-</sup>. The trigger efficiency is shown for γ<sub>d</sub> with 0&lt;|η|&lt;1.1 as function of the transverse momentum, in events where the γ<sub>d</sub> L<sub>xy</sub> is below 6 m.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.
DOI: 10.17182/hepdata.131523.v1/t22
title: "Table 22" of "Search for light long-lived neutral particles that decay to collimated pairs of leptons or light hadrons in $pp$ collisions at $\sqrt{s}=13$~TeV with the ATLAS detector"

description: Efficiency of the cosmic-ray tagger as function of the γ<sub>d</sub> transverse decay length. The efficiency is calculated accepting the μDPJs for which the cosmic-ray tagger score is &gt; 0.2 for each associated MS-only track.
description: A search for light long-lived neutral particles with masses in the O(MeV-GeV) range is presented. The analysis targets the production of long-lived dark photons in the decay of a Higgs boson produced via gluon-gluon fusion or in association with a W boson. Events that contain displaced collimated Standard Model fermions reconstructed in the calorimeter or muon spectrometer are selected in 139 fb<sup>-1</sup> of 13 TeV pp collision data collected by the ATLAS detector at the LHC.

Background estimates for contributions from Standard Model processes and instrumental effects are extracted from data. The observed event yields are consistent with the expected background. Exclusion limits are reported on the production cross-section times branching fraction as a function of the mean proper decay length cτ of the dark photon, or as a function of the dark-photon mass and kinetic mixing parameter that quantifies the coupling between the Standard Model and potential hidden (dark) sectors. A Higgs boson branching fraction above 1% is excluded at 95% CL for a Higgs boson decaying into two dark photons for dark-photon mean proper decay lengths between 10 mm and 250 mm and dark photons with masses between 0.4 GeV and 2 GeV.