cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.103060.v1/t13
title: "Figure 7 Cu+Cu 62.4 GeV" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: $p_{t}$ correlations plotted as a function of $\langle N_{part}\rangle$ for different $p_{t}$ ranges in Cu+Cu collisions at (a) 200 GeV and (b) 62.4 GeV.
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103060.v1/t15
title: "Figure 8" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: Correlations for varying $p_{t}$ ranges for different model calculations in Cu+Cu 200 GeV. (a) AMPT (SM), (b) URQMD, and (c) Hijing (no JQ).
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103060.v1/t2
title: "Figure 2 Au+Au" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: Comparison of dynamical $\langle p_{t}\rangle$ fluctuations in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 and 200 GeV as a function of the number of participanting nucleons.
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103060.v1/t9
title: "Figure 4 Cu+Cu 200 GeV" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: Comparison of scaled $p_{t}$ correlations between data and models for Au+Au [panels (a) and (c)] and Cu+Cu [panels (b) and (d)] collisions at 200 GeV.
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103060.v1/t14
title: "Figure 7 Cu+Cu 200 GeV" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: $p_{t}$ correlations plotted as a function of $\langle N_{part}\rangle$ for different $p_{t}$ ranges in Cu+Cu collisions at (a) 200 GeV and (b) 62.4 GeV.
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103060.v1/t16
title: "Figure 9 top panel" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: Uncorrected inclusive charged particle $p_{t}$ spectrum for 0%–10% collision centrality for Cu+Cu 200 GeV (open circles).
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103060.v1/t17
title: "Figure 9 bottom panel" of "System Size Dependence of Transverse Momentum Correlations at RHIC"

description: Correlations scaled by $(d\langle p_{t}\rangle/dT)^{2}T^{2}$ vs. $\langle N_{part}\rangle$ for different $p_{t}$ ranges in Cu+Cu 200 GeV.
description: We present a study of the average transverse momentum ($p_{t}$) fluctuations and pt correlations for charged particles produced in Cu+Cu collisions at midrapidity for $\sqrt{s_{NN}}$ = 62.4 and 200 GeV. These results are compared with those published for Au+Au collisions at the same energies, to explore the system size dependence. In addition to the collision energy and system size dependence, the pt correlation results have been studied as functions of the collision centralities, the ranges in $p_{t}$, the pseudorapidity $\eta$, and the azimuthal angle $\phi$. The square root of the measured pt correlations when scaled by mean pt is found to be independent of both colliding beam energy and system size studied. Transport-based model calculations are found to have a better quantitative agreement with the measurements compared to models which incorporate only jetlike correlations.
DOI: 10.17182/hepdata.103061.v1/t1
title: "Figure 1" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Distributions of x1 and x2 in two different bins of reconstructed $\pi^{0}$ pT for events at $\sqrt{s}$ = 200 GeV over 0.8 &lt; $\eta$ &lt; 2.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t2
title: "Figure 2 left panel" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Comparison of data to Monte Carlo for the distributions of two-photon invariant mass (left) and energy for the higher (center) and lower (right) energy photon.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t3
title: "Figure 2 right panel" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Comparison of data to Monte Carlo for the distributions of two-photon invariant mass (left) and energy for the higher (center) and lower (right) energy photon.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t5
title: "Figure 3" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Invariant mass distribution for the two-photon system with 7 &lt; pT &lt; 8 GeV/c.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t7
title: "Figure 4 right panel" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Signal fractions calculated within the “peak region” of 0.1 &lt; $M_{\gamma\gamma}$ &lt; 0.2 $GeV/c^{2}$. Fractions for the full dataset as well as the subsets of longitudinal and transverse polarizations are shown as a function of pT (left), and the fractions for the transversely polarized data are shown as a function of $x_{F}$ integrated over 5 &lt; pT &lt; 12 GeV/c (right).
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t8
title: "Figure 5 Data" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Upper panel, the $\pi^{0}$ cross section (blue markers) is shown compared with an NLO pQCD cal- culation with three options for the scale parameter. The lower panel presents the ratio of the data to the pT-scale theory curve, as well as the ratio of the 2pT-scale and pT/2-scale theory curves to the pT-scale curve.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t9
title: "Figure 5 Theory" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: Upper panel, the $\pi^{0}$ cross section (blue markers) is shown compared with an NLO pQCD cal- culation with three options for the scale parameter. The lower panel presents the ratio of the data to the pT-scale theory curve, as well as the ratio of the 2pT-scale and pT/2-scale theory curves to the pT-scale curve.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.
DOI: 10.17182/hepdata.103061.v1/t11
title: "Figure 7 Theory 1" of "Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200$ GeV"

description: The ALL results (blue markers) are presented with the DSSV prediction and the GRSV prediction using the best fit to polarized DIS ($\Delta$ g = std) and the maximum and minimum allowed values for gluon polarization.
description: The differential cross section and spin asymmetries for neutral pions produced within the intermediate pseudorapidity range 0.8 &lt; $\eta$ &lt; 2.0 in polarized proton-proton collisions at $sqrt{s}$ = 200 GeV are presented. Neutral pions were detected using the endcap electromagnetic calorimeter in the STAR detector at RHIC. The cross section was measured over a transverse momentum range of 5 &lt; $p_{T}$ &lt; 16 GeV/c and is found to be within the scale uncertainty of a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry, $A_{LL}$, is measured in the same pseudorapidity range. This quantity is sensitive to the gluonic contribution to the proton spin, $\Delta$g(x), at low Bjorken-x (down to x $\approx$ 0.01), where it is less constrained by measurements at central pseudorapidity. The measured $A_{LL}$ is consistent with model predictions. The parity-violating asymmetry, $A_{L}$, is also measured and found to be consistent with zero. The transverse single-spin asymmetry, $A_{N}$, is measured within a previously unexplored kinematic range in Feynman-x and $p_{T}$. Such measurements may aid our understanding of the on-set and kinematic dependence of the large asymmetries observed at more forward pseudorapidity ($\eta \approx 3$) and their underlying mechanisms. The $A_{N}$ results presented are consistent with a twist-3 model prediction of a small asymmetry within the present kinematic range.