cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.141627.v1/t2
title: "Figure 3" of "Nuclear modification of psi^prime, chi_c and J/psi production in d+Au collisions at sqrt(s_NN) = 200 GeV"

description: The $\psi^{\prime}$ nuclear modification factor, $R_{dAu}$, as a function of $N_{coll}$. Also included is the previously measured $J/\psi$ $R_{dAu}$ as a function of $N_{coll}$.
description: We present results for three charmonia states ($psi^{\prime}$, $\chi_c$ and $J/\psi$) in $d$+Au collisions at $|y|$ &lt; 0.35 and $\sqrt{s_{NN}}$ = 200 GeV. We find that the modification of the $\psi^{\prime}$ yield relative to that of the $J/\psi$ scales approximately with charged-particle multiplicity at midrapidity across $p$+$A$, $d$+Au, and $A$+$A$ results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large impact-parameter collisions we observe a similar suppression for the $\psi^{\prime}$ and $J/\psi$, while in small impact-parameter collisions the more weakly bound $\psi^{\prime}$ is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger $\psi^{\prime}$ suppression in central events is not explained by an increase of the nuclear absorption due to meson formation time effects.
DOI: 10.17182/hepdata.141627.v1/t3
title: "Figure 4" of "Nuclear modification of psi^prime, chi_c and J/psi production in d+Au collisions at sqrt(s_NN) = 200 GeV"

description: The $\psi^{\prime}$ nuclear modification factor, $R_{dAu}$, as a function of proper time in nucleus. Also included is the previously measured $J/\psi$ $R_{dAu}$ as a function of $N_{coll}$.
description: We present results for three charmonia states ($psi^{\prime}$, $\chi_c$ and $J/\psi$) in $d$+Au collisions at $|y|$ &lt; 0.35 and $\sqrt{s_{NN}}$ = 200 GeV. We find that the modification of the $\psi^{\prime}$ yield relative to that of the $J/\psi$ scales approximately with charged-particle multiplicity at midrapidity across $p$+$A$, $d$+Au, and $A$+$A$ results from the Super Proton Synchrotron and the Relativistic Heavy Ion Collider. In large impact-parameter collisions we observe a similar suppression for the $\psi^{\prime}$ and $J/\psi$, while in small impact-parameter collisions the more weakly bound $\psi^{\prime}$ is more strongly suppressed. Owing to the short time spent traversing the Au nucleus, the larger $\psi^{\prime}$ suppression in central events is not explained by an increase of the nuclear absorption due to meson formation time effects.
DOI: 10.17182/hepdata.141628.v1/t1
title: "Table 3" of "Cross section and longitudinal single-spin asymmetry $A_L$ for forward $W^{\pm}\rightarrow\mu^{\pm}\nu$ production in polarized $p$$+$$p$ collisions at $\sqrt{s}=510$ GeV"

description: Single-spin asymmetries at forward $A^{FW}_L$ and backward $A^{BW}_L$ rapidities for $p$+$p$ collisions at $\sqrt{s}$ = 510 GeV for results in 2013 and 2012, plus combined results for both years.
description: We have measured the cross section and single spin asymmetries from forward $W^{\pm}$ $\rightarrow$ $\mu^{\pm}$ $\nu$ production in longitudinally polarized $p$+$p$ collisions at $\sqrt{s}$ = 510 GeV using the PHENIX detector at the Relativistic Heavy Ion Collider. The cross sections are consistent with previous measurements at this collision energy, while the most forward and backward longitudinal single spin asymmetries provide new insights into the sea quark helicities in the proton. The charge of the W bosons provides a natural flavor separation of the participating partons.
DOI: 10.17182/hepdata.141628.v1/t2
title: "Conclusion" of "Cross section and longitudinal single-spin asymmetry $A_L$ for forward $W^{\pm}\rightarrow\mu^{\pm}\nu$ production in polarized $p$$+$$p$ collisions at $\sqrt{s}=510$ GeV"

description: The total $W$ boson production cross sections for $p$+$p$ collisions at $\sqrt{s}$ = 510 GeV for $\sigma$($W^+$ $\rightarrow$ $\mu^+$) and $\sigma$($W^-$ $\rightarrow$ $\mu^-$).
description: We have measured the cross section and single spin asymmetries from forward $W^{\pm}$ $\rightarrow$ $\mu^{\pm}$ $\nu$ production in longitudinally polarized $p$+$p$ collisions at $\sqrt{s}$ = 510 GeV using the PHENIX detector at the Relativistic Heavy Ion Collider. The cross sections are consistent with previous measurements at this collision energy, while the most forward and backward longitudinal single spin asymmetries provide new insights into the sea quark helicities in the proton. The charge of the W bosons provides a natural flavor separation of the participating partons.
DOI: 10.17182/hepdata.141635.v1/t1
title: "Figure 1a" of "Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV"

description: Transverse single-spin asymmetry in $J/\psi$ production as a function of $x_F$ for 2006 and 2008 data sets. Systematic uncertainties $\delta$$A^f_N$ Type B and $\delta$$A^P_N$ Type B are due to the geometric scale factor and the polarization, respectively.
description: We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 &lt; $|y|$ &lt; 2.2 and $|y|$ &lt; 0.35 for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$. In this paper, we calculated $$ separately for the north and south muon spectrometers. The new combined spin asymmetry in the forward region is $A_N$ = -0.026 $\pm$ 0.026$^{stat}$ $\pm$ 0.003$^{syst}$. Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible nonzero trigluon correlation function in transversely polarized protons.
DOI: 10.17182/hepdata.141635.v1/t2
title: "Figure 1b" of "Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV"

description: Transverse single-spin asymmetry in $J/\psi$ production as a function of $x_F$ for 2006 and 2008 data sets. Systematic uncertainties $\delta$$A^f_N$ Type B and $\delta$$A^P_N$ Type B are due to the geometric scale factor and the polarization, respectively.
description: We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 &lt; $|y|$ &lt; 2.2 and $|y|$ &lt; 0.35 for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$. In this paper, we calculated $$ separately for the north and south muon spectrometers. The new combined spin asymmetry in the forward region is $A_N$ = -0.026 $\pm$ 0.026$^{stat}$ $\pm$ 0.003$^{syst}$. Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible nonzero trigluon correlation function in transversely polarized protons.
DOI: 10.17182/hepdata.141635.v1/t3
title: "Figure 1c" of "Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV"

description: Transverse single-spin asymmetry in $J/\psi$ production as a function of $x_F$ for 2006 and 2008 data sets. Systematic uncertainties $\delta$$A^f_N$ Type B and $\delta$$A^P_N$ Type B are due to the geometric scale factor and the polarization, respectively.
description: We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 &lt; $|y|$ &lt; 2.2 and $|y|$ &lt; 0.35 for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$. In this paper, we calculated $$ separately for the north and south muon spectrometers. The new combined spin asymmetry in the forward region is $A_N$ = -0.026 $\pm$ 0.026$^{stat}$ $\pm$ 0.003$^{syst}$. Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible nonzero trigluon correlation function in transversely polarized protons.
DOI: 10.17182/hepdata.141635.v1/t4
title: "Figure 2a" of "Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV"

description: Transverse single-spin asymmetry of $J/\psi$ mesons plotted against $J/\psi$ transverse momentum. Systematic uncertainties $\delta$$A^f_N$ Type B and $\delta$$A^P_N$ Type B are due to the geometric scale factor and the polarization, respectively.
description: We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 &lt; $|y|$ &lt; 2.2 and $|y|$ &lt; 0.35 for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$. In this paper, we calculated $$ separately for the north and south muon spectrometers. The new combined spin asymmetry in the forward region is $A_N$ = -0.026 $\pm$ 0.026$^{stat}$ $\pm$ 0.003$^{syst}$. Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible nonzero trigluon correlation function in transversely polarized protons.
DOI: 10.17182/hepdata.141635.v1/t5
title: "Figure 2b" of "Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV"

description: Transverse single-spin asymmetry of $J/\psi$ mesons plotted against $J/\psi$ transverse momentum. Systematic uncertainties $\delta$$A^f_N$ Type B and $\delta$$A^P_N$ Type B are due to the geometric scale factor and the polarization, respectively.
description: We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 &lt; $|y|$ &lt; 2.2 and $|y|$ &lt; 0.35 for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$. In this paper, we calculated $$ separately for the north and south muon spectrometers. The new combined spin asymmetry in the forward region is $A_N$ = -0.026 $\pm$ 0.026$^{stat}$ $\pm$ 0.003$^{syst}$. Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible nonzero trigluon correlation function in transversely polarized protons.
DOI: 10.17182/hepdata.141635.v1/t6
title: "Figure 2c" of "Measurement of Transverse Single-Spin Asymmetries for J/psi Production in Polarized p+p Collisions at sqrt(s) = 200 GeV"

description: Transverse single-spin asymmetry of $J/\psi$ mesons plotted against $J/\psi$ transverse momentum. Systematic uncertainties $\delta$$A^f_N$ Type B and $\delta$$A^P_N$ Type B are due to the geometric scale factor and the polarization, respectively.
description: We report the first measurement of transverse single-spin asymmetries in $J/\psi$ production from transversely polarized $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 &lt; $|y|$ &lt; 2.2 and $|y|$ &lt; 0.35 for transverse momenta up to 6 GeV/$c$. $J/\psi$ production at RHIC is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the $J/\psi$ can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the $J/\psi$ production mechanism. Asymmetries were obtained as a function of $J/\psi$ transverse momentum and Feynman-$x$. In this paper, we calculated $$ separately for the north and south muon spectrometers. The new combined spin asymmetry in the forward region is $A_N$ = -0.026 $\pm$ 0.026$^{stat}$ $\pm$ 0.003$^{syst}$. Since this asymmetry is consistent with zero, we no longer claim that our results suggest a possible nonzero trigluon correlation function in transversely polarized protons.
DOI: 10.17182/hepdata.141644.v1/t1
title: "Figure 3" of "Cross section and double helicity asymmetry for eta mesons and their comparison to neutral pion production in p+p collisions at sqrt(s)=200 GeV"

description: Cross section for midrapidity inclusive of $\eta$ productions at $\sqrt{s}$ = 200 GeV as a function of $p_T$ and its comparison to NLO pQCD calculations at three different scales $\mu$. The error bars shown are the statistical and systematic uncertainties added in quadrature. Note that the fragmentation functions used in the calculations are partially constrained by this data.
description: Measurements of double helicity asymmetries in inclusive hadron production in polarized $p + p$ collisions are sensitive to helicity-dependent parton distribution functions, in particular to the gluon helicity distribution, ∆g. This study focuses on the extraction of the double helicity asymmetry in $\eta$ production ($\vec{p}+\vec{p}$ → $\eta+X$), the $\eta$ cross section and the $\eta/\pi^0$ cross section ratio. The cross section and ratio measurements provide essential input for the extraction of fragmentation functions that are needed to access the helicity-dependent parton distribution functions.
DOI: 10.17182/hepdata.141644.v1/t2
title: "Figure 5" of "Cross section and double helicity asymmetry for eta mesons and their comparison to neutral pion production in p+p collisions at sqrt(s)=200 GeV"

description: Cross section ratio for the midrapidity production of inclusive $\eta$ to $\pi^0$ mesons at $\sqrt{s}$ = 200 GeV as a function of $p_T$. The error bars show the statistical and systematic uncertainties added in quadrature. The solid curve shows the ratio of the NLO pQCD calculations shown in Fig. 3 and the corresponding one for the $\pi^0$. The dashed curve shows the result of a PYTHIA Monte-Carlo simulation.
description: Measurements of double helicity asymmetries in inclusive hadron production in polarized $p + p$ collisions are sensitive to helicity-dependent parton distribution functions, in particular to the gluon helicity distribution, ∆g. This study focuses on the extraction of the double helicity asymmetry in $\eta$ production ($\vec{p}+\vec{p}$ → $\eta+X$), the $\eta$ cross section and the $\eta/\pi^0$ cross section ratio. The cross section and ratio measurements provide essential input for the extraction of fragmentation functions that are needed to access the helicity-dependent parton distribution functions.
DOI: 10.17182/hepdata.141644.v1/t3
title: "Figure 6" of "Cross section and double helicity asymmetry for eta mesons and their comparison to neutral pion production in p+p collisions at sqrt(s)=200 GeV"

description: Double helicity asymmetry for midrapidity inclusive $\eta$ production from the combined 2005 and 2006 data at $\sqrt{s}$ = 200 GeV as a function of $p_T$. An additional 4.8% systematic uncertainty in the beam polarizations is not shown.
description: Measurements of double helicity asymmetries in inclusive hadron production in polarized $p + p$ collisions are sensitive to helicity-dependent parton distribution functions, in particular to the gluon helicity distribution, ∆g. This study focuses on the extraction of the double helicity asymmetry in $\eta$ production ($\vec{p}+\vec{p}$ → $\eta+X$), the $\eta$ cross section and the $\eta/\pi^0$ cross section ratio. The cross section and ratio measurements provide essential input for the extraction of fragmentation functions that are needed to access the helicity-dependent parton distribution functions.
DOI: 10.17182/hepdata.141645.v1/t1
title: "Figure 8a-1" of "Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV"

description: Identified hadron $v_2$ in central (0–20% centrality, left panels) Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Panels (a) and (b) show $v_2$ as a function of transverse momentum $p_T$. The $v_2$ of all species for centrality 0–20% has been scaled up by a factor of 1.6 for better comparison with results of 20–60% centrality. The error bars (shaded boxes) represent the statistical (systematic) uncertainties. The systematic uncertainties shown are type A and B only.
description: Measurements of the anisotropy parameter $v_2$ of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum $p_T$ , and transverse kinetic energy KE$_T$ at midrapidity (|$\eta$| &lt; 0.35) in Au + Au collisions at $\sqrt{s_{NN}}$ =200 GeV are presented. Pions and protons are identified up to $p_T$ = 6 GeV/c, and kaons up to $p_T$ = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX ˇExperiment. The scaling of $v_2$ with the number of valence quarks ($n_q$) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KE$_T$ /$n_q$ in noncentral Au + Au collisions (20–60%), but this scaling remains valid in central collisions (0–10%).
DOI: 10.17182/hepdata.141645.v1/t2
title: "Figure 8a-2" of "Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV"

description: Identified hadron $v_2$ in central (0–20% centrality, left panels) Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Panels (a) and (b) show $v_2$ as a function of transverse momentum $p_T$. The $v_2$ of all species for centrality 0–20% has been scaled up by a factor of 1.6 for better comparison with results of 20–60% centrality. The error bars (shaded boxes) represent the statistical (systematic) uncertainties. The systematic uncertainties shown are type A and B only.
description: Measurements of the anisotropy parameter $v_2$ of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum $p_T$ , and transverse kinetic energy KE$_T$ at midrapidity (|$\eta$| &lt; 0.35) in Au + Au collisions at $\sqrt{s_{NN}}$ =200 GeV are presented. Pions and protons are identified up to $p_T$ = 6 GeV/c, and kaons up to $p_T$ = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX ˇExperiment. The scaling of $v_2$ with the number of valence quarks ($n_q$) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KE$_T$ /$n_q$ in noncentral Au + Au collisions (20–60%), but this scaling remains valid in central collisions (0–10%).
DOI: 10.17182/hepdata.141645.v1/t3
title: "Figure 8a-3" of "Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV"

description: Identified hadron $v_2$ in central (0–20% centrality, left panels) Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Panels (a) and (b) show $v_2$ as a function of transverse momentum $p_T$. The $v_2$ of all species for centrality 0–20% has been scaled up by a factor of 1.6 for better comparison with results of 20–60% centrality. The error bars (shaded boxes) represent the statistical (systematic) uncertainties. The systematic uncertainties shown are type A and B only.
description: Measurements of the anisotropy parameter $v_2$ of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum $p_T$ , and transverse kinetic energy KE$_T$ at midrapidity (|$\eta$| &lt; 0.35) in Au + Au collisions at $\sqrt{s_{NN}}$ =200 GeV are presented. Pions and protons are identified up to $p_T$ = 6 GeV/c, and kaons up to $p_T$ = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX ˇExperiment. The scaling of $v_2$ with the number of valence quarks ($n_q$) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KE$_T$ /$n_q$ in noncentral Au + Au collisions (20–60%), but this scaling remains valid in central collisions (0–10%).
DOI: 10.17182/hepdata.141645.v1/t4
title: "Figure 8b-1" of "Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV"

description: Identified hadron $v_2$ in midcentral (20–60%, right panels) Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Panels (a) and (b) show $v_2$ as a function of transverse momentum $p_T$. The $v_2$ of all species for centrality 0–20% has been scaled up by a factor of 1.6 for better comparison with results of 20–60% centrality. The error bars (shaded boxes) represent the statistical (systematic) uncertainties. The systematic uncertainties shown are type A and B only.
description: Measurements of the anisotropy parameter $v_2$ of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum $p_T$ , and transverse kinetic energy KE$_T$ at midrapidity (|$\eta$| &lt; 0.35) in Au + Au collisions at $\sqrt{s_{NN}}$ =200 GeV are presented. Pions and protons are identified up to $p_T$ = 6 GeV/c, and kaons up to $p_T$ = 4 GeV/c, by combining information from time-of-flight and aerogel Cerenkov detectors in the PHENIX ˇExperiment. The scaling of $v_2$ with the number of valence quarks ($n_q$) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KE$_T$ /$n_q$ in noncentral Au + Au collisions (20–60%), but this scaling remains valid in central collisions (0–10%).