cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.156818.v1/t63
title: "Meas. 23: $A_{CP}$" of "Measurements of $W^+W^-$ production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector"

description: Measured value of the asymmetry in the CP-odd observable $O_{z}$, $A_{CP}$.
description: Measurements of $W^+W^-\rightarrow e^\pm \nu \mu^\mp \nu$ production cross-sections are presented, providing a test of the predictions of perturbative quantum chromodynamics and the electroweak theory. The measurements are based on data from $pp$ collisions at $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider in 2015--2018, corresponding to an integrated luminosity of 140 fb$^{-1}$. The number of events due to top-quark pair production, the largest background, is reduced by rejecting events containing jets with $b$-hadron decays. An improved methodology for estimating the remaining top-quark background enables a precise measurement of $W^+W^-$ cross-sections with no additional requirements on jets. The fiducial $W^+W^-$ cross-section is determined in a maximum-likelihood fit with an uncertainty of 3.1%. The measurement is extrapolated to the full phase space, resulting in a total $W^+W^-$ cross-section of $127\pm4$ pb. Differential cross-sections are measured as a function of twelve observables that comprehensively describe the kinematics of $W^+W^-$ events. The measurements are compared with state-of-the-art theory calculations and excellent agreement with predictions is observed. A charge asymmetry in the lepton rapidity is observed as a function of the dilepton invariant mass, in agreement with the Standard Model expectation. A CP-odd observable is measured to be consistent with no CP violation. Limits on Standard Model effective field theory Wilson coefficients in the Warsaw basis are obtained from the differential cross-sections.
DOI: 10.17182/hepdata.156823.v1/t1
title: "Observed contour ALP-W" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for ALP-W model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156823.v1/t2
title: "Observed contour ALP-gluon" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for ALP-gluon model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156823.v1/t3
title: "Observed contour ALP-photon" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for ALP-photon model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156823.v1/t4
title: "Observed contour U1B" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for U1B model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156823.v1/t5
title: "Observed contour up-philic" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for up-philic model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156823.v1/t6
title: "Observed contour 2HDM" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for 2HDM model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156823.v1/t7
title: "Observed contour Dark Photon" of "Shining Light on the Dark Sector: Search for Axion-like Particles and Other New Physics in Photonic Final States with FASER"

description: 90% CL observed contour for Dark Photon model
description: The first FASER search for a light, long-lived particle decaying into a pair of photons is reported. The search uses LHC proton-proton collision data at √s=13.6 TeV collected in 2022 and 2023, corresponding to an integrated luminosity of 57.7fb−1. A model with axion-like particles (ALPs) dominantly coupled to weak gauge bosons is the primary target. Signal events are characterised by high-energy deposits in the electromagnetic calorimeter and no signal in the veto scintillators. One event is observed, compared to a background expectation of 0.44±0.39 events, which is entirely dominated by neutrino interactions. World-leading constraints on ALPs are obtained for masses up to 300 MeV and couplings to the Standard Model W gauge boson, gaWW, around 10−4 GeV−1, testing a previously unexplored region of parameter space. Other new particle models that lead to the same experimental signature, including ALPs coupled to gluons or photons, U(1)B gauge bosons, up-philic scalars, and a Type-I two-Higgs doublet model, are also considered for interpretation, and new constraints on previously viable parameter space are presented in this paper.
DOI: 10.17182/hepdata.156837.v1/t1
title: "Table 1" of "Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The observed profile likelihood ratio, $-2ln \Lambda$, as a function of $\Gamma_H$.
description: CERN-LHC. Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. This measurement is a a combined measurement of on-shell Higgs boson production and the production of four top quarks.
DOI: 10.17182/hepdata.156837.v1/t2
title: "Table 2" of "Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The observed profile likelihood ratio, $-2ln \Lambda$, as a function of $\Gamma_H/\Gamma_H^{SM}$ and $\kappa_t$.
description: CERN-LHC. Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. This measurement is a a combined measurement of on-shell Higgs boson production and the production of four top quarks.
DOI: 10.17182/hepdata.156837.v1/t3
title: "Table 3" of "Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The observed profile likelihood ratio, $-2ln \Lambda$, as a function of $\Gamma_H/\Gamma_H^{SM}$.
description: CERN-LHC. Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. This measurement is a a combined measurement of on-shell Higgs boson production and the production of four top quarks.
DOI: 10.17182/hepdata.156837.v1/t4
title: "Table 4" of "Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The observed profile likelihood ratio, $-2ln \Lambda$, as a function of $\Gamma_H$. Compared with the version in the paper, the effective couplings in the ggF, $H\to\gamma\gamma$, and $H\to Z\gamma$ processes are in terms of SM coupling strengths, resulting in an improved upper limit under stronger model assumptions.
description: CERN-LHC. Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. This measurement is a a combined measurement of on-shell Higgs boson production and the production of four top quarks.
DOI: 10.17182/hepdata.156837.v1/t5
title: "Table 5" of "Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The observed profile likelihood ratio, $-2ln \Lambda$, as a function of $\Gamma_H/\Gamma_H^{SM}$. Compared with the version in the paper, the effective couplings in the ggF, $H\to\gamma\gamma$, and $H\to Z\gamma$ processes are in terms of SM coupling strengths, resulting in an improved upper limit under stronger model assumptions.
description: CERN-LHC. Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. This measurement is a a combined measurement of on-shell Higgs boson production and the production of four top quarks.
DOI: 10.17182/hepdata.156837.v1/t6
title: "Table 6" of "Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The observed profile likelihood ratio, $-2ln \Lambda$, as a function of $\Gamma_H/\Gamma_H^{SM}$ and $\kappa_t$. Compared with the version in the paper, the effective couplings in the ggF, $H\to\gamma\gamma$, and $H\to Z\gamma$ processes are in terms of SM coupling strengths, resulting in an improved upper limit under stronger model assumptions.
description: CERN-LHC. Constraint on the total width of the Higgs boson from Higgs boson and four-top-quark measurements in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector. This measurement is a a combined measurement of on-shell Higgs boson production and the production of four top quarks.
DOI: 10.17182/hepdata.156846.v1/t1
title: "Figure 2a" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the DT category in the signal region (SR). The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t2
title: "Figure 2b" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the CSC category in the signal region (SR). The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t3
title: "Figure 3a" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the DT category in the out-of-time (OOT) region. The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t4
title: "Figure 3b" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the CSC category in the out-of-time (OOT) region. The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t5
title: "Figure 4a" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The 95% CL observed and expected upper limits on the VLL production cross section as a function of the VLL mass for the pseudoscalar mean proper decay length c$\tau$ = 0.025 m. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t6
title: "Figure 4b" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The 95% CL observed and expected upper limits on the VLL production cross section as a function of the pseudoscalar mean proper decay length c$\tau$ for VLL Mass of 700 GeV. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t10
title: "Signal Efficiency DT Category" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Selection efficiencies in the DT category signal region (SR) for different signal hypothesis. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t7
title: "Figure 5 map" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The 95% CL observed upper limits on the VLL production cross section as a function of the VLL mass and the pseudoscalar mean proper decay length c$\tau$. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t8
title: "Figure 5 contour" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The 95% CL observed exclusion contour on the VLL production cross section as a function of the VLL mass and the pseudoscalar mean proper decay length c$\tau$. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v1/t9
title: "Signal Efficiency CSC Category" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Selection efficiencies in the CSC category signal region (SR) for different signal hypothesis. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t1
title: "Figure 2" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The cluster reconstruction efficiency, including both DT and CSC clusters, as a function of the simulated r and |z| decay positions of the pseudoscalar into photons in events with MET &gt; 200 GeV, for a VLL mass of 700 GeV and a pseudoscalar mass of 2 GeV, and a range of ctau values uniformly distributed between 0.01 and 0.1 m.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t2
title: "Figure 3a" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the DT category in the signal region (SR). The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t10
title: "Signal CutFlow Efficiency CSC Category" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Selection efficiencies in the CSC category signal region (SR) for different signal hypothesis. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t3
title: "Figure 3b" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the CSC category in the signal region (SR). The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t4
title: "Figure 4a" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the DT category in the out-of-time (OOT) region. The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t5
title: "Figure 4b" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: Distributions of the number of hits in the cluster (Nhits) for the CSC category in the out-of-time (OOT) region. The last histogram bin contains all overflow events.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t6
title: "Figure 5a" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The 95% CL observed and expected upper limits on the VLL production cross section as a function of the VLL mass for the pseudoscalar mean proper decay length c$\tau$ = 0.025 m. The pseudoscalar mass is 2 GeV.
description: No data abstract available.
DOI: 10.17182/hepdata.156846.v2/t7
title: "Figure 5b" of "Search for vector-like leptons with long-lived particle decays in the CMS muon system in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

description: The 95% CL observed and expected upper limits on the VLL production cross section as a function of the pseudoscalar mean proper decay length c$\tau$ for VLL Mass of 700 GeV. The pseudoscalar mass is 2 GeV.
description: No data abstract available.