cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.142940.v1/t13
title: "Figure 9d & 12d" of "Systematic studies of the centrality and s(NN)**(1/2) dependence of dE(T)/d mu and d N(ch)/d mu in heavy ion collisions at mid-rapidity."

description: 200, 130, and 19.6 GeV are RHIC average values, and 17.2, 8.7, and 4.8 GeV are SPS average values of $dN_{ch}$/$d\eta$/($0.5N_p$) at different $\sqrt{s_{NN}}$. An additional 5% error (recalc.) is added for collision energies 4.8 - 17.6 GeV for the uncertainty related to recalculation to the Center of Mass system.
description: The PHENIX experiment at RHIC has measured transverse energy and charged particle multiplicity at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6, 130, and 200 GeV as a function of centrality. The presented results are compared to measurements from other RHIC experiments, and experiments at lower energies. The $\sqrt{s_{NN}}$ dependence of $dE_T$/$d\eta$ and $dN_{ch}$/$d\eta$ per pair of participants is consistent with logarithmic scaling for the most central events. The centrality dependence of $dE_T$/$d\eta$ and $dN_{ch}$/$d\eta$ is similar at all measured incident energies. At RHIC energies the ratio of transverse energy per charged particle was found independent of centrality and growing slowly with $\sqrt{s_{NN}}$. A survey of comparisons between the data and available theoretical models is also presented.
DOI: 10.17182/hepdata.142940.v1/t8
title: "Figure 6a" of "Systematic studies of the centrality and s(NN)**(1/2) dependence of dE(T)/d mu and d N(ch)/d mu in heavy ion collisions at mid-rapidity."

description: Ratios of measured quantities at 200 GeV/130 GeV and 200 GeV/19.6 GeV. The number of $N_P$ is the average between two energies.
description: The PHENIX experiment at RHIC has measured transverse energy and charged particle multiplicity at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6, 130, and 200 GeV as a function of centrality. The presented results are compared to measurements from other RHIC experiments, and experiments at lower energies. The $\sqrt{s_{NN}}$ dependence of $dE_T$/$d\eta$ and $dN_{ch}$/$d\eta$ per pair of participants is consistent with logarithmic scaling for the most central events. The centrality dependence of $dE_T$/$d\eta$ and $dN_{ch}$/$d\eta$ is similar at all measured incident energies. At RHIC energies the ratio of transverse energy per charged particle was found independent of centrality and growing slowly with $\sqrt{s_{NN}}$. A survey of comparisons between the data and available theoretical models is also presented.
DOI: 10.17182/hepdata.142940.v1/t9
title: "Figure 6b" of "Systematic studies of the centrality and s(NN)**(1/2) dependence of dE(T)/d mu and d N(ch)/d mu in heavy ion collisions at mid-rapidity."

description: Ratios of measured quantities at 200 GeV/130 GeV and 200 GeV/19.6 GeV. The number of $N_P$ is the average between two energies.
description: The PHENIX experiment at RHIC has measured transverse energy and charged particle multiplicity at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6, 130, and 200 GeV as a function of centrality. The presented results are compared to measurements from other RHIC experiments, and experiments at lower energies. The $\sqrt{s_{NN}}$ dependence of $dE_T$/$d\eta$ and $dN_{ch}$/$d\eta$ per pair of participants is consistent with logarithmic scaling for the most central events. The centrality dependence of $dE_T$/$d\eta$ and $dN_{ch}$/$d\eta$ is similar at all measured incident energies. At RHIC energies the ratio of transverse energy per charged particle was found independent of centrality and growing slowly with $\sqrt{s_{NN}}$. A survey of comparisons between the data and available theoretical models is also presented.
DOI: 10.17182/hepdata.142963.v1/t2
title: "Figure 1b" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Transverse momentum spectra of electrons in PHENIX from Au+Au collisions at $\sqrt{s_{NN}}$ = 130 GeV.
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t1
title: "Figure 1a" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Transverse momentum spectra of electrons in PHENIX from Au+Au collisions at $\sqrt{s_{NN}}$ = 130 GeV.
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t3
title: "Figure 1c" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Transverse momentum spectra of electrons in PHENIX from Au+Au collisions at $\sqrt{s_{NN}}$ = 130 GeV. The upper limit for 1.9 GeV/$c$ is 4.10224e-05.
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t4
title: "Figure 2" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Ratio of the electron data to the calculated background as a function of $p_T$ in minimum bias collisions (upper panel) and relative contributions to the background from various sources (lower panel). The curves for $\omega$ and $\phi$ show the sum of the Dalitz and the di-electron decay modes.
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t5
title: "Figure 3a" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: The background-subtracted electron spectra for central (0-10%) collisions compared with the expected contributions from open charm decays. Also shown, for central collisions only, are the expected contribution from bottom decays (dashed) and the conversion electron spectrum from a direct phonon prediction (dotted).
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t6
title: "Figure 3b" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: The background-subtracted electron spectra for minimum bias (0-92%) collisions compared with the expected contributions from open charm decays. Also shown, for central collisions only, are the expected contribution from bottom decays (dashed) and the conversion electron spectrum from a direct phonon prediction (dotted).
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t7
title: "Figure 4a" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Single electron cross sections $\frac{d\sigma_e}{dy}|_{y=0}$ of this measurement and ISR experiments [9,11,31] are displayed (bottom of figure, right-hand scale) with charm decay contributions calculated with PYTHIA. Open and filled symbols for 1.0 &lt; $p_T$ &lt; 1.4 GeV/$c$ and $p_T$ &gt; 1.4 GeV/$c$, respectively. The derived charm cross section of this measurement is compared with charm cross sections from SPS/FNAL experiments (top of figure, left-hand scale). The thick curve and the shaded band represent the charm cross section in the PYTHIA model and in a NLO pQCD calculation [30], respectively.
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142963.v1/t8
title: "Figure 4b" of "Measurement of single electrons and implications for charm production in Au + Au collisions at s(NN)**(1/2) = 130-GeV."

description: Single electron cross sections $\frac{d\sigma_e}{dy}|_{y=0}$ of this measurement and ISR experiments [9,11,31] are displayed (bottom of figure, right-hand scale) with charm decay contributions calculated with PYTHIA. Open and filled symbols for 1.0 &lt; $p_T$ &lt; 1.4 GeV/$c$ and $p_T$ &gt; 1.4 GeV/$c$, respectively. The derived charm cross section of this measurement is compared with charm cross sections from SPS/FNAL experiments (top of figure, left-hand scale). The thick curve and the shaded band represent the charm cross section in the PYTHIA model and in a NLO pQCD calculation [30], respectively.
description: Transverse momentum spectra of electrons from Au$+$Au collisions at $\sqrt{s_{_{NN}}}$ = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal $dN_{e}/dy$ for $p_{T} &gt; 0.8$ GeV/c is 0.025 $\pm$ 0.004(stat) $\pm$ 6 0.010(syst) in central collisions, and the corresponding charm cross section is 380 $\pm$ 60(stat) $\pm$ 200(syst) $\mu$b per binary nucleon-nucleon collision.
DOI: 10.17182/hepdata.142985.v1/t1
title: "Figure 5" of "Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: Ratio $R_{\gamma}$ as function of photon $p_T$ from the 2007 and 2010 data sets in minimum-bias Au+Au collisions, and the $R_{\gamma}$ in the combined 2007+2010 measurement.
description: The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV down to $p_T$ = 0.4 GeV/$c$. Photons are detected via photon conversions to $e^+e^−$ pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low $p_T$. We find an excess of direct photons above the $N_{coll}$-scaled yield measured in $p$+$p$ collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/$c$ in the $p_T$ range from 0.6 - 2.0 GeV/$c$. While the shape of the $p_T$ distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with $N_{part}^{\alpha}$, where $\alpha$ = 1.38 $\pm$ 0.03(stat) $\pm$ 0.07(syst).
DOI: 10.17182/hepdata.142985.v1/t2
title: "Figure 6" of "Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: Ratio $R_{\gamma}$ as function of photon $p_T$ for the combined 2007 and 2010 data sets in different centrality bins.
description: The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV down to $p_T$ = 0.4 GeV/$c$. Photons are detected via photon conversions to $e^+e^−$ pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low $p_T$. We find an excess of direct photons above the $N_{coll}$-scaled yield measured in $p$+$p$ collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/$c$ in the $p_T$ range from 0.6 - 2.0 GeV/$c$. While the shape of the $p_T$ distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with $N_{part}^{\alpha}$, where $\alpha$ = 1.38 $\pm$ 0.03(stat) $\pm$ 0.07(syst).
DOI: 10.17182/hepdata.142985.v1/t3
title: "Figure 8a" of "Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: Direct photon $p_T$ spectra in different centrality bins.
description: The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV down to $p_T$ = 0.4 GeV/$c$. Photons are detected via photon conversions to $e^+e^−$ pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low $p_T$. We find an excess of direct photons above the $N_{coll}$-scaled yield measured in $p$+$p$ collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/$c$ in the $p_T$ range from 0.6 - 2.0 GeV/$c$. While the shape of the $p_T$ distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with $N_{part}^{\alpha}$, where $\alpha$ = 1.38 $\pm$ 0.03(stat) $\pm$ 0.07(syst).
DOI: 10.17182/hepdata.142985.v1/t4
title: "Figure 8b" of "Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: Direct photon $p_T$ spectra in different centrality bins.
description: The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV down to $p_T$ = 0.4 GeV/$c$. Photons are detected via photon conversions to $e^+e^−$ pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low $p_T$. We find an excess of direct photons above the $N_{coll}$-scaled yield measured in $p$+$p$ collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/$c$ in the $p_T$ range from 0.6 - 2.0 GeV/$c$. While the shape of the $p_T$ distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with $N_{part}^{\alpha}$, where $\alpha$ = 1.38 $\pm$ 0.03(stat) $\pm$ 0.07(syst).
DOI: 10.17182/hepdata.142985.v1/t5
title: "Figure 9" of "Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: Direct photon $p_T$ spectra after subtraction of the $N_{coll}$ scaled $p$+$p$ contribution in different centrality bins.
description: The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV down to $p_T$ = 0.4 GeV/$c$. Photons are detected via photon conversions to $e^+e^−$ pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low $p_T$. We find an excess of direct photons above the $N_{coll}$-scaled yield measured in $p$+$p$ collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/$c$ in the $p_T$ range from 0.6 - 2.0 GeV/$c$. While the shape of the $p_T$ distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with $N_{part}^{\alpha}$, where $\alpha$ = 1.38 $\pm$ 0.03(stat) $\pm$ 0.07(syst).
DOI: 10.17182/hepdata.142985.v1/t6
title: "Figure 10" of "Centrality dependence of low-momentum direct-photon production in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

description: Integrated thermal photon yields as a function of $N_{part}$ for different lower $p_T$ integration limits.
description: The PHENIX experiment at RHIC has measured the centrality dependence of the direct photon yield from Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV down to $p_T$ = 0.4 GeV/$c$. Photons are detected via photon conversions to $e^+e^−$ pairs and an improved technique is applied that minimizes the systematic uncertainties that usually limit direct photon measurements, in particular at low $p_T$. We find an excess of direct photons above the $N_{coll}$-scaled yield measured in $p$+$p$ collisions. This excess yield is well described by an exponential distribution with an inverse slope of about 240 MeV/$c$ in the $p_T$ range from 0.6 - 2.0 GeV/$c$. While the shape of the $p_T$ distribution is independent of centrality within the experimental uncertainties, the yield increases rapidly with increasing centrality, scaling approximately with $N_{part}^{\alpha}$, where $\alpha$ = 1.38 $\pm$ 0.03(stat) $\pm$ 0.07(syst).
DOI: 10.17182/hepdata.142989.v1/t1
title: "Table I" of "Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at sqrt(s)=62.4 GeV"

description: Fit-function parameters for the efficiency curves for different hadron species.
description: Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from $p$ + $p$ collisions at $\sqrt{s}$ = 62.4 GeV GeV are presented. The PHENIX measurement of the cross sections for 1.0 &lt; $p_T$ &lt; 4.5 GeV/$c$ are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, $\alpha_s$. Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 $\lesssim$ $x_{gluon}$ $\lesssim$ 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.
DOI: 10.17182/hepdata.142989.v1/t2
title: "Table II" of "Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at sqrt(s)=62.4 GeV"

description: Fit-function parameters for relative fractions of different species in the hadron mix.
description: Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from $p$ + $p$ collisions at $\sqrt{s}$ = 62.4 GeV GeV are presented. The PHENIX measurement of the cross sections for 1.0 &lt; $p_T$ &lt; 4.5 GeV/$c$ are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, $\alpha_s$. Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 $\lesssim$ $x_{gluon}$ $\lesssim$ 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.
DOI: 10.17182/hepdata.142989.v1/t3
title: "Table III" of "Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p+p collisions at sqrt(s)=62.4 GeV"

description: Systematic uncertainties of cross-section measurements from various sources.
description: Unpolarized cross sections and double-helicity asymmetries of single-inclusive positive and negative charged hadrons at midrapidity from $p$ + $p$ collisions at $\sqrt{s}$ = 62.4 GeV GeV are presented. The PHENIX measurement of the cross sections for 1.0 &lt; $p_T$ &lt; 4.5 GeV/$c$ are consistent with perturbative QCD calculations at next-to-leading order in the strong-coupling constant, $\alpha_s$. Resummed pQCD calculations including terms with next-to-leading-log accuracy, yielding reduced theoretical uncertainties, also agree with the data. The double-helicity asymmetry, sensitive at leading order to the gluon polarization in a momentum-fraction range of 0.05 $\lesssim$ $x_{gluon}$ $\lesssim$ 0.2, is consistent with recent global parametrizations disfavoring large gluon polarization.