cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.141896.v1/t2
title: "ADD-model upper limits" of "Search for quantum black hole production in lepton+jet final states using proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The combined 95% CL upper limits on $\sigma \times Br$ as a function of threshold mass, $M_\mathrm{th}$, for QBH production with decay into lepton+jet for ADD-model (extra dimensions n = 6). The limits take into account statistical and systematic uncertainties. Circles along the solid red line indicate the mass $M_\mathrm{th}$ of the signal where the observed limit is computed. The expected limits are shown by the dashed line. The $\pm 1\sigma$ and $\pm 2\sigma$ bands are shown in green and yellow, respectively. The theoretically predicted $\sigma \times Br$ for the QBH production and decay is shown as the solid blue curve with squares.
description: CERN-LHC. A search for quantum black holes in electron+jet and muon+jet invariant mass spectra is performed with 140 fb$^{-1}$ of data collected by the ATLAS detector in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron Collider. The observed invariant mass spectrum of lepton+jet pairs is consistent with Standard Model expectations. Upper limits are set at 95% confidence level on the production cross-sections times branching fractions for quantum black holes decaying into a lepton and a quark in a search region with invariant mass above 2.0 TeV. The resulting quantum black hole lower mass threshold limit is 9.2 TeV in the Arkani-Hamed-Dimopoulos-Dvali model, and 6.8 TeV in the Randall-Sundrum model.
DOI: 10.17182/hepdata.141896.v1/t3
title: "RS1-model upper limits" of "Search for quantum black hole production in lepton+jet final states using proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector"

description: The combined 95% CL upper limits on $\sigma \times Br$ as a function of threshold mass, $M_\mathrm{th}$, for QBH production with decay into lepton+jet for RS1-model (extra dimensions n = 1). The limits take into account statistical and systematic uncertainties. Circles along the solid red line indicate the mass $M_\mathrm{th}$ of the signal where the observed limit is computed. The expected limits are shown by the dashed line. The $\pm 1\sigma$ and $\pm 2\sigma$ bands are shown in green and yellow, respectively. The theoretically predicted $\sigma \times Br$ for the QBH production and decay is shown as the solid blue curve with squares.
description: CERN-LHC. A search for quantum black holes in electron+jet and muon+jet invariant mass spectra is performed with 140 fb$^{-1}$ of data collected by the ATLAS detector in proton-proton collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron Collider. The observed invariant mass spectrum of lepton+jet pairs is consistent with Standard Model expectations. Upper limits are set at 95% confidence level on the production cross-sections times branching fractions for quantum black holes decaying into a lepton and a quark in a search region with invariant mass above 2.0 TeV. The resulting quantum black hole lower mass threshold limit is 9.2 TeV in the Arkani-Hamed-Dimopoulos-Dvali model, and 6.8 TeV in the Randall-Sundrum model.
DOI: 10.17182/hepdata.141931.v1/t1
title: "Figure 1" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Azimuthal correlation functions for charged hadrons as a function of centrality and $p_T$ selection. The solid curves represent Fourier fits following Eq. (2). Error bars are statistical only.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t2
title: "Figure 2a" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: $v_2$ vs. centrality for several $p_T$ selections. [F] and [A] indicate results obtained with the fixed-$p_T$ and assorted-$p_T$ methods respectively. Systematic errors are estimated to be $\sim 5$%; they are dominated by the normalization of the correction function for real tracks. For the centrality range 0-5%, the data points are statistically uncertain and the points are omitted.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t3
title: "Figure 2b" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: $v_2$ vs. centrality for several $p_T$ selections. [F] and [A] indicate results obtained with the fixed-$p_T$ and assorted-$p_T$ methods respectively. Systematic errors are estimated to be $\sim 5$%; they are dominated by the normalization of the correction function for real tracks. For the centrality range 0-5%, the data points are statistically uncertain and the points are omitted.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t4
title: "Figure 3a" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: $v_2$ vs Fixed $p_T$ for several centrality selections. [F] and [A] follow the notation Fig. 2. Systematic errors are estimated to be $\sim 5$%.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t5
title: "Figure 3b" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: $v_2$ vs Assorted $p_T$ for several centrality selections. [F] and [A] follow the notation Fig. 2. Systematic errors are estimated to be $\sim 5$%.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t6
title: "Figure 3c" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: $v_2$ vs Assorted $p_T$ for several centrality selections. [F] and [A] follow the notation Fig. 2. Systematic errors are estimated to be $\sim 5$%.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t7
title: "Figure 4a" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: The centrality dependence of $A_2$ for two different $p_T$ selections. [F] and [A] follow the notation in Fig. 2. Systematic errors are estimated to be $\sim 10$%, dominated by the normalization of the correction function and the model determination of$ \varepsilon$.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141931.v1/t8
title: "Figure 4b" of "Flow measurements via two-particle azimuthal correlations in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: The centrality dependence of $A_2$ for two different $p_T$ selections. [F] and [A] follow the notation in Fig. 2. Systematic errors are estimated to be $\sim 10$%, dominated by the normalization of the correction function and the model determination of$ \varepsilon$.
description: Two particle azimuthal correlation functions are presented for charged hadrons produced in Au + Au collisions at RHIC $\sqrt{s_{NN}}$ = 130 GeV. The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values $v_2$ show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone, epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low $p_T$. A breakdown of this epsilon scaling is observed for charged hadrons with $p_T &gt; 1.0$ GeV/$c$ for the most central collisions.
DOI: 10.17182/hepdata.141936.v1/t1
title: "Figure 1a" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $\pi^0$ $v_2$ using the reaction plane determined with MPC and RXN$_{in}$ combined as a function of $p_T$ for different centralities.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t2
title: "Figure 1b" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: Ratios of $v_2$ measured separately using MPC and RXN$_{in}$ to combine results.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t3
title: "Figure 2a-1" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $v_2$ vs $N_{part}$ in two $p_T$ ranges and $R_{AA}$ vs $N_{part}$ in the same $p_T$ ranges.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t4
title: "Figure 2a-2" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $v_2$ vs $N_{part}$ in two $p_T$ ranges and $R_{AA}$ vs $N_{part}$ in the same $p_T$ ranges.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t5
title: "Figure 2a-3" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $v_2$ vs $N_{part}$ in two $p_T$ ranges and $R_{AA}$ vs $N_{part}$ in the same $p_T$ ranges.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t6
title: "Figure 2b-1" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $v_2$ vs $N_{part}$ and $R_{AA}$ vs $N_{part}$ in two $p_T$ ranges compared with WHDG model.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t7
title: "Figure 2b-2a" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $v_2$ vs $N_{part}$ in two $p_T$ ranges compared with various models.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141936.v1/t8
title: "Figure 2b-2b" of "Azimuthal anisotropy of neutral pion production in Au+Au collisions at $\sqrt(s_NN)$ = 200 GeV: Path-length dependence of jet quenching and the role of initial geometry"

description: $R_{AA}$ vs $N_{part}$ in two $p_T$ ranges compared with various models.
description: We have measured the azimuthal anisotropy of $\pi^0$ for 1 &lt; $p_T$ &lt; 18 GeV/$c$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The observed anisotropy shows a gradual decrease in 3 &lt; $p_T$ &lt; 7 - 10 GeV/$c$, but remains positive beyond 10 GeV/$c$. The magnitude of this anisotropy is under-predicted, up to at least 10 GeV/$c$, by current perturbative QCD (pQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and initial-geometry fluctuations is insufficient to account for this discrepancy. Calculations which implement a path length dependence steeper than what is implied by current pQCD energy-loss models, show reasonable agreement with the data.
DOI: 10.17182/hepdata.141938.v1/t1
title: "Figure 2a" of "Nuclear dependence of the transverse single-spin asymmetry in the production of charged hadrons at forward rapidity in polarized $p+p$, $p+$Al, and $p+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: $A_N$ as a function of $A^{1/3}$ for positively-charged hadrons at 1.4 &lt; $\eta$ &lt; 2.4, 0.1 &lt; $x_F$ &lt; 0.2, and 1.8 &lt; $p_T$ &lt; 7.0 GeV/$c$ in $p^{\uparrow}$+$p$, $p^{\uparrow}$+Al, and $p^{\uparrow}$+Au collisions.
description: We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively-charged hadrons in polarized $p^{\uparrow}$+$p$, $p^{\uparrow}$+Al and $p^{\uparrow}$+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The measurements have been performed at forward rapidity (1.4 &lt; $\eta$ &lt; 2.4) over the range of transverse momentum (1.8 &lt; $p_T$ &lt; 7.0 GeV/$c$) and Feynman-$x$ (0.1 &lt; $x_F$&lt; 0.2). We observed a positive asymmetry $A_N$ for positively-charged hadrons in $p^{\uparrow}$+$p$ collisions, and a significantly reduced asymmetry in $p^{\uparrow}$+$A$ collisions. These results reveal a nuclear dependence of charged hadron $A_N$ in a regime where perturbative techniques are relevant. These results provide new opportunities to use $p^{\uparrow}$+$A$ collisions as a tool to investigate the rich phenomena behind TSSAs in hadronic collisions and to use TSSA as a new handle in studying small-system collisions.