cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.140801.v1/t18
title: "Figure 8: Observed 68% CL Lower Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Observed 68% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled. This is the lower part of the contour.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t19
title: "Figure 8: Observed 68% CL Upper Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Observed 68% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled. This is the upper part of the contour.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t20
title: "Figure 8: Observed 95% CL Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Observed 95% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t21
title: "Figure 8: Expected 68% CL Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Expected 68% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t22
title: "Figure 8: Expected 95% CL Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Expected 95% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t23
title: "Auxiliary Figure 7: Observed 68% CL Lower Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Observed 68% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled. This is the lower part of the contour.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t24
title: "Auxiliary Figure 7: Observed 68% CL Upper Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Observed 68% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled. This is the upper part of the contour.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t25
title: "Auxiliary Figure 7: Observed 95% CL Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Observed 95% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t26
title: "Auxiliary Figure 7: Expected 68% CL Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Expected 68% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140801.v1/t27
title: "Auxiliary Figure 7: Expected 95% CL Limit Contour" of "Observation of four-top-quark production in the multilepton final state with the ATLAS detector"

description: Expected 95% CL Limit Contour in $\kappa_t,\alpha$ with $t\bar tt\bar t$ parameterized as a function of $\kappa_t,\alpha$, and the $t\bar tH$ parameterization profiled.
description: A measurment is presented for four-top-quark production using an integrated luminosity of 140 fb\(^{-1}\) of proton--proton collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. Events are selected if they contain a same-sign lepton pair or at least three leptons (electrons or muons). Jet multiplicity, jet flavour and event kinematics are used to separate signal from the background through a multivariate discriminant, and dedicated control regions are used to constrain the dominant backgrounds. The four-top-quark production cross section is measured to be $22.5^{+6.6}_{-5.5}$ fb. This corresponds to an observed (expected) significance with respect to the background-only hypothesis of 6.1 (4.3) standard deviations and provides evidence for this process.
DOI: 10.17182/hepdata.140802.v1/t1
title: "Total Cross Section" of "Measurement of the J/$\psi $ photoproduction cross section over the full near-threshold kinematic region"

description: $\gamma p \rightarrow J/\psi p$ total cross sections in bins of beam energy. The first uncertainties are statistical, and the second are systematic. There is an additional fully correlated systematic uncertainty of 19.5% on the total cross section, not included here.
description: No data abstract available.
DOI: 10.17182/hepdata.140802.v1/t2
title: "Differential Cross Section $E_\gamma=8.93$ GeV" of "Measurement of the J/$\psi $ photoproduction cross section over the full near-threshold kinematic region"

description: $\gamma p \rightarrow J/\psi p$ differential cross sections 8.2–9.28 GeV beam energy range, average $t$ and beam energy in bins of $t$. The first cross section uncertainties are statistical, and the second are systematic. The overall average beam energy is 8.93 GeV. There is an additional fully correlated systematic uncertainty of 19.5% on the total cross section, not included here.
description: No data abstract available.
DOI: 10.17182/hepdata.140802.v1/t3
title: "Differential Cross Section $E_\gamma=9.86$ GeV" of "Measurement of the J/$\psi $ photoproduction cross section over the full near-threshold kinematic region"

description: $\gamma p \rightarrow J/\psi p$ differential cross sections 9.28–10.36 GeV beam energy range, average $t$ and beam energy in bins of $t$. The first cross section uncertainties are statistical, and the second are systematic. The overall average beam energy is 9.86 GeV. There is an additional fully correlated systematic uncertainty of 19.5% on the total cross section, not included here.
description: No data abstract available.
DOI: 10.17182/hepdata.140802.v1/t4
title: "Differential Cross Section $E_\gamma=10.82$ GeV" of "Measurement of the J/$\psi $ photoproduction cross section over the full near-threshold kinematic region"

description: $\gamma p \rightarrow J/\psi p$ differential cross sections 10.36–11.44 GeV beam energy range, average $t$ and beam energy in bins of $t$. The first cross section uncertainties are statistical, and the second are systematic. The overall average beam energy is 10.82 GeV. There is an additional fully correlated systematic uncertainty of 19.5% on the total cross section, not included here.
description: No data abstract available.
DOI: 10.17182/hepdata.140834.v1/t1
title: "Table 1" of "Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment"

description: The measured asymmetry of top quark pairs in $t\bar{t}\gamma$ production in a fiducial region at particle level.
description: CERN-LHC-ATLAS. A measurement of the charge asymmetry in top-quark pair ($t\bar{t}$) production in association with a photon is presented. The measurement is performed in the single-lepton $t\bar{t}$ decay channel using proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015-2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be $A_{C} = -0.003 \pm 0.029$ in agreement with the Standard Model expectation.
DOI: 10.17182/hepdata.140834.v1/t2
title: "Table 2" of "Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment"

description: Normalised differential cross section as a function of $|y(t)| - |y(\bar{t})|$. The observed data is compared with the SM expectation using aMC@NLO+Pythia8 at NLO QCD precision. The value of the charge asymmetry corresponds to the difference between the two bins. Underflow and overflow events are included in corresponding bins of the distribution.
description: CERN-LHC-ATLAS. A measurement of the charge asymmetry in top-quark pair ($t\bar{t}$) production in association with a photon is presented. The measurement is performed in the single-lepton $t\bar{t}$ decay channel using proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015-2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be $A_{C} = -0.003 \pm 0.029$ in agreement with the Standard Model expectation.
DOI: 10.17182/hepdata.140834.v1/t3
title: "Table 3" of "Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment"

description: Definition of the fiducial phase space at particle level.
where,
$\gamma$: photon
$\ell$: lepton
j: jet
description: CERN-LHC-ATLAS. A measurement of the charge asymmetry in top-quark pair ($t\bar{t}$) production in association with a photon is presented. The measurement is performed in the single-lepton $t\bar{t}$ decay channel using proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015-2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be $A_{C} = -0.003 \pm 0.029$ in agreement with the Standard Model expectation.
DOI: 10.17182/hepdata.140834.v1/t4
title: "Table 4" of "Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment"

description: Correlation matrix of all the parameters including nuisance parameters used in the profile likelihood unfolding fit on $A_{C}$.
description: CERN-LHC-ATLAS. A measurement of the charge asymmetry in top-quark pair ($t\bar{t}$) production in association with a photon is presented. The measurement is performed in the single-lepton $t\bar{t}$ decay channel using proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015-2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be $A_{C} = -0.003 \pm 0.029$ in agreement with the Standard Model expectation.
DOI: 10.17182/hepdata.140841.v1/t1
title: "Table 1" of "Jet-like correlations with respect to K$^{0}_{\rm S}$ and $\Lambda$ ($\bar{\Lambda}$) in pp and Pb-Pb collisions at $\mathbf{\it\sqrt{s_\mathrm{NN}}}$ = 5.02 TeV"

description: Distributions of $C(\Delta\varphi)$ for h$-$h, K$^{0}_\mathrm{S}$-h,and ($\Lambda+\overline{\Lambda})-$h as trigger particles with $8 &lt; p_\mathrm{T,trig}&lt;16 \mathrm{GeV}/c$ and associated particles with $4 &lt; p_\mathrm{T,assoc}&lt;6$ GeV/$c$ in $0-10\%$ central Pb$-$Pb and pp collisions. The background has been subtracted based on the estimation of ZYAM in pp collisions and the additional contributions of the anisotropic flow harmonics $v_{2}$ and $v_{3}$ in Pb$-$Pb collisions.
description: Two-particle correlations with K$^{0}_\mathrm{S}$, $\Lambda/\overline{\Lambda}$, and charged hadrons as trigger particles in the transverse momentum range $8 &lt; p_\mathrm{T,trig}&lt;16$ GeV/$c$, and associated charged particles within $1 &lt; p_\mathrm{T,assoc}&lt;8$ GeV/$c$, are studied at mid-rapidity in pp and central Pb$-$Pb collisions at a centre-of-mass energy per nucleon--nucleon collision $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE detector at the LHC.
After subtracting the contributions of the flow background, the per-trigger yields are extracted on both the near and away sides, and the ratio in Pb$-$Pb collisions with respect to pp collisions ($I_{\mathrm{AA}}$) is computed. The per-trigger yield in Pb$-$Pb collisions on the away side is strongly suppressed to the level of $I_{\mathrm{AA}}$
$\approx 0.6$ for $p_\mathrm{T,assoc}&gt;3$ GeV/$c$ as expected from strong in-medium energy loss, while an enhancement develops at low $p_\mathrm{T,assoc}$ on both the near and away sides, reaching $I_{\mathrm{AA}}$ $\approx 1.8$ and $2.7$ respectively. These findings are in good agreement with previous ALICE measurements from two-particle correlations triggered by neutral pions ($\pi^{0}$--h) and charged hadrons (h--h) in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}= 2.76$ TeV. Moreover, the correlations with K$^{0}_\mathrm{S}$ mesons and $\Lambda/\overline{\Lambda}$ baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.
DOI: 10.17182/hepdata.140841.v1/t2
title: "Table 2.1" of "Jet-like correlations with respect to K$^{0}_{\rm S}$ and $\Lambda$ ($\bar{\Lambda}$) in pp and Pb-Pb collisions at $\mathbf{\it\sqrt{s_\mathrm{NN}}}$ = 5.02 TeV"

description: Near-side of per-trigger yield modification, ($I_{\mathrm{AA}}$), of h$-$h, K$^{0}_\mathrm{S}$-h,and $(\Lambda+\overline{\Lambda})-$h trigger momentum range is $8&lt; p_{T}^{trig} &lt; 16~\mathrm{GeV}/c$, and associated charged particle momentum ranges which are showen in the table down.
description: Two-particle correlations with K$^{0}_\mathrm{S}$, $\Lambda/\overline{\Lambda}$, and charged hadrons as trigger particles in the transverse momentum range $8 &lt; p_\mathrm{T,trig}&lt;16$ GeV/$c$, and associated charged particles within $1 &lt; p_\mathrm{T,assoc}&lt;8$ GeV/$c$, are studied at mid-rapidity in pp and central Pb$-$Pb collisions at a centre-of-mass energy per nucleon--nucleon collision $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE detector at the LHC.
After subtracting the contributions of the flow background, the per-trigger yields are extracted on both the near and away sides, and the ratio in Pb$-$Pb collisions with respect to pp collisions ($I_{\mathrm{AA}}$) is computed. The per-trigger yield in Pb$-$Pb collisions on the away side is strongly suppressed to the level of $I_{\mathrm{AA}}$
$\approx 0.6$ for $p_\mathrm{T,assoc}&gt;3$ GeV/$c$ as expected from strong in-medium energy loss, while an enhancement develops at low $p_\mathrm{T,assoc}$ on both the near and away sides, reaching $I_{\mathrm{AA}}$ $\approx 1.8$ and $2.7$ respectively. These findings are in good agreement with previous ALICE measurements from two-particle correlations triggered by neutral pions ($\pi^{0}$--h) and charged hadrons (h--h) in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}= 2.76$ TeV. Moreover, the correlations with K$^{0}_\mathrm{S}$ mesons and $\Lambda/\overline{\Lambda}$ baryons as trigger particles are compared to those of inclusive charged hadrons. The results are compared with the predictions of Monte Carlo models.