cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.101341.v1/t1
title: "Figure 1 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The two-particle cumulant $v_2\{2\}^2$ for Au+Au collisions at 200 and 62.4 GeV. Results are shown with like-sign combinations (LS) and charge-independent results (CI) for $0.15 &lt; p_T &lt; 2.0$ GeV/$c$.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t2
title: "Figure 1 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The same as the left but for Cu+Cu collisions. The systematic errors are shown as thin lines with wide caps at the ends and statistical errors are shown as thick lines with small caps at the end. Statistical and systematic errors are very small.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t3
title: "Figure 2 (up)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The difference of charge-independent (CI) v2{2} and like-sign (LS) $v_2\{2\}$ for Au+Au and Cu+Cu collisions at 200 (top panel) and 62.4 (bottom panel) GeV vs. the log of $\langle dN_{ch}/d\eta\rangle$.The statistical errors are smaller than the marker size and not visible for most of the data.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t4
title: "Figure 2 (bottom)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The difference of charge-independent (CI) v2{2} and like-sign (LS) $v_2\{2\}$ for Au+Au and Cu+Cu collisions at 200 (top panel) and 62.4 (bottom panel) GeV vs. the log of $\langle dN_{ch}/d\eta\rangle$.The statistical errors are smaller than the marker size and not visible for most of the data.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t5
title: "Figure 3 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The LS and CI four-particle cumulant $v_2\{4\}^4$ for Au+Au collisions at 200 and 62.4 GeV for $0.15 &lt; pT &lt; 2.0$ GeV/$c$. The systematic errors are shown as narrow lines with wide caps at the end and statistical errors are shown as thick lines with narrow caps at the end. Statistical errors are not visible for most of the points.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t6
title: "Figure 3 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The LS and CI four-particle cumulant $v_2\{4\}^4$ for Cu+Cu collisions at 200 and 62.4 GeV for $0.15 &lt; p_T &lt; 2.0$ GeV/c. The most central points (two points for Cu+Cu 62.4 GeV) gives $v_2\{4\}^4 &lt; 0$ for all the data sets. The negative values are probably due to large fluctuations in agreement with Eq. (1). These may include contributions from impact parameter spread and finite multiplicity bin width.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t7
title: "Figure 4" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The difference of charge-independent (CI) $v_2\{4\}$ and like-sign (LS) $v_2\{4\}$ for Au+Au collisions at 200 and 62.4 GeV vs. the log of $\langle dN_{ch}/d\eta\rangle$.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t9
title: "Figure 5 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: (Right) The difference between $v_2\{2\}^2$ and $v_2\{4\}^2$ for 62.4 GeV Au+Au and Cu+Cu collisions for both LS and CI combinations. The statistical and systematic errors are shown as in previous figures.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t10
title: "Figure 6 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Au+Au collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models. The upper limit is found using the LS results for $v_2\{2\}$. Data are from the range $0.15 &lt; p_T &lt; 2.0$ GeV/$c$. The shaded bands reflect the uncertainties on the models which are dominated by uncertainty on the distribution of nucleons inside the nucleus. The uncertainty is only shown for the MCG-N and fKLN-CGC models. The uncertainty on the MCG-Q model is the same as for the MCG-N model but is not shown for the visual clarity.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t11
title: "Figure 6 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Au+Au collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models. The upper limit is found using the LS results for $v_2\{2\}$. Data are from the range $0.15 &lt; p_T &lt; 2.0$ GeV/$c$. The shaded bands reflect the uncertainties on the models which are dominated by uncertainty on the distribution of nucleons inside the nucleus. The uncertainty is only shown for the MCG-N and fKLN-CGC models. The uncertainty on the MCG-Q model is the same as for the MCG-N model but is not shown for the visual clarity.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t12
title: "Figure 7" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The STAR data compared to PHOBOS data [34] on $\sigma_{v_2}/\langle v_2 \rangle$ with $\delta_2$ for $\Delta\eta &gt; 2$ taken to be zero (see Fig. 6 from Ref. [34]). The shaded band shows the errors quoted from Ref. [34].
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t13
title: "Figure 8 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Cu+Cu collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t14
title: "Figure 8 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Cu+Cu collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v1/t8
title: "Figure 5 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: (Left) The difference between $v_2\{2\}^2$ and $v_2\{4\}^2$ for 200 GeV Au+Au and Cu+Cu collisions for both LS and CI combinations.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t1
title: "Figure 1 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The two-particle cumulant $v_2\{2\}^2$ for Au+Au collisions at 200 and 62.4 GeV. Results are shown with like-sign combinations (LS) and charge-independent results (CI) for $0.15 &lt; p_T &lt; 2.0$ GeV/$c$.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t2
title: "Figure 1 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The same as the left but for Cu+Cu collisions. The systematic errors are shown as thin lines with wide caps at the ends and statistical errors are shown as thick lines with small caps at the end. Statistical and systematic errors are very small.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t3
title: "Figure 2 (up)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The difference of charge-independent (CI) v2{2} and like-sign (LS) $v_2\{2\}$ for Au+Au and Cu+Cu collisions at 200 (top panel) and 62.4 (bottom panel) GeV vs. the log of $\langle dN_{ch}/d\eta\rangle$.The statistical errors are smaller than the marker size and not visible for most of the data.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t4
title: "Figure 2 (bottom)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The difference of charge-independent (CI) v2{2} and like-sign (LS) $v_2\{2\}$ for Au+Au and Cu+Cu collisions at 200 (top panel) and 62.4 (bottom panel) GeV vs. the log of $\langle dN_{ch}/d\eta\rangle$.The statistical errors are smaller than the marker size and not visible for most of the data.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t5
title: "Figure 3 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The LS and CI four-particle cumulant $v_2\{4\}^4$ for Au+Au collisions at 200 and 62.4 GeV for $0.15 &lt; pT &lt; 2.0$ GeV/$c$. The systematic errors are shown as narrow lines with wide caps at the end and statistical errors are shown as thick lines with narrow caps at the end. Statistical errors are not visible for most of the points.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t10
title: "Figure 6 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Au+Au collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models. The upper limit is found using the LS results for $v_2\{2\}$. Data are from the range $0.15 &lt; p_T &lt; 2.0$ GeV/$c$. The shaded bands reflect the uncertainties on the models which are dominated by uncertainty on the distribution of nucleons inside the nucleus. The uncertainty is only shown for the MCG-N and fKLN-CGC models. The uncertainty on the MCG-Q model is the same as for the MCG-N model but is not shown for the visual clarity.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t11
title: "Figure 6 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Au+Au collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models. The upper limit is found using the LS results for $v_2\{2\}$. Data are from the range $0.15 &lt; p_T &lt; 2.0$ GeV/$c$. The shaded bands reflect the uncertainties on the models which are dominated by uncertainty on the distribution of nucleons inside the nucleus. The uncertainty is only shown for the MCG-N and fKLN-CGC models. The uncertainty on the MCG-Q model is the same as for the MCG-N model but is not shown for the visual clarity.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t12
title: "Figure 7" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The STAR data compared to PHOBOS data [34] on $\sigma_{v_2}/\langle v_2 \rangle$ with $\delta_2$ for $\Delta\eta &gt; 2$ taken to be zero (see Fig. 6 from Ref. [34]). The shaded band shows the errors quoted from Ref. [34].
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t6
title: "Figure 3 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The LS and CI four-particle cumulant $v_2\{4\}^4$ for Cu+Cu collisions at 200 and 62.4 GeV for $0.15 &lt; p_T &lt; 2.0$ GeV/c. The most central points (two points for Cu+Cu 62.4 GeV) gives $v_2\{4\}^4 &lt; 0$ for all the data sets. The negative values are probably due to large fluctuations in agreement with Eq. (1). These may include contributions from impact parameter spread and finite multiplicity bin width.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t7
title: "Figure 4" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The difference of charge-independent (CI) $v_2\{4\}$ and like-sign (LS) $v_2\{4\}$ for Au+Au collisions at 200 and 62.4 GeV vs. the log of $\langle dN_{ch}/d\eta\rangle$.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t8
title: "Figure 5 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: (Left) The difference between $v_2\{2\}^2$ and $v_2\{4\}^2$ for 200 GeV Au+Au and Cu+Cu collisions for both LS and CI combinations.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t9
title: "Figure 5 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: (Right) The difference between $v_2\{2\}^2$ and $v_2\{4\}^2$ for 62.4 GeV Au+Au and Cu+Cu collisions for both LS and CI combinations. The statistical and systematic errors are shown as in previous figures.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t13
title: "Figure 8 (left)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Cu+Cu collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models.
description: No data abstract available.
DOI: 10.17182/hepdata.101341.v2/t14
title: "Figure 8 (right)" of "Energy and system-size dependence of two- and four-particle $v_2$ measurements in heavy-ion collisions at RHIC and their implications on flow fluctuations and nonflow"

description: The upper limit on $\sigma_{v_2}/\langle v_2 \rangle$ for 200 GeV (left) and 62.4 GeV (right) Cu+Cu collisions from Eq. (9) compared to $\sigma_\varepsilon/\varepsilon$ from Eq. (10) for three different models.
description: No data abstract available.
DOI: 10.17182/hepdata.101342.v1/t1
title: "Figure 1 (left)" of "$\rho^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR"

description: Acceptance corrected invariant mass distributions for the coherently produced $\rho^0$ candidates collected with trigger A (left) and B (right). The fit function (solid) encompasses the Breit-Wigner (dashed), the mass independent contribution from direct $\pi^+\pi^-$ production (dash-dotted), and the interference term (dotted). The hatched area is the contribution from the combinatorial background. The statistical errors are shown.
description: No data abstract available.
DOI: 10.17182/hepdata.101342.v1/t3
title: "Figure 2" of "$\rho^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR"

description: Transverse momentum distribution of the $\rho^0$ candidates (open distribution) overlaid by the combinatorial background estimated with like-sign pairs (not corrected to the acceptance and reconstruction efficiency) and scaled to match in the high transverse momentum region, $p_T$ ≥ 250 MeV/$c$ (hatched distribution). The plot is based on the dataset collected with trigger B.
description: No data abstract available.
DOI: 10.17182/hepdata.101342.v1/t5
title: "Figure 4" of "$\rho^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR"

description: Comparison of theoretical predictions to the measured total cross section for coherent $\rho^0$ production as a functionof $\sqrt{s_{NN}}$ . The measured cross section is based on the dataset collected with trigger B. The error bars show the sum of the statistical and systematic uncertainties. See text for details.
description: No data abstract available.
DOI: 10.17182/hepdata.101343.v1/t1
title: "Figure 2 (c)" of "Transverse Single-Spin Asymmetry and Cross-Section for pi0 and eta Mesons at Large Feynman-x in Polarized p+p Collisions at sqrt(s)=200 GeV"

description: (c) $A_N$ vs. $M_{\gamma\gamma}$ for the above mass distribution. The error bars are statistical uncertainties only.
description: No data abstract available.
DOI: 10.17182/hepdata.101342.v1/t2
title: "Figure 1 (right)" of "$\rho^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR"

description: Acceptance corrected invariant mass distributions for the coherently produced $\rho^0$ candidates collected with trigger A (left) and B (right). The fit function (solid) encompasses the Breit-Wigner (dashed), the mass independent contribution from direct $\pi^+\pi^-$ production (dash-dotted), and the interference term (dotted). The hatched area is the contribution from the combinatorial background. The statistical errors are shown.
description: No data abstract available.
DOI: 10.17182/hepdata.101342.v1/t4
title: "Figure 3" of "$\rho^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR"

description: $\rho^0$ production cross section determined with the data set collected with trigger B, as a function of momentum transfer $t$, fitted with a double exponential fit function in the range $t &lt; 0.1$. The statistical errors are shown. The ratio of incoherent to coherent cross sections is measured to be $0.20 \pm 0.8$. The fit parameters are shown in Table I.
description: No data abstract available.
DOI: 10.17182/hepdata.101343.v1/t2
title: "Figure 4 (up)" of "Transverse Single-Spin Asymmetry and Cross-Section for pi0 and eta Mesons at Large Feynman-x in Polarized p+p Collisions at sqrt(s)=200 GeV"

description: Differential production cross-sections for $\pi^0$ and $\eta$ at average pseudorapidity of 3.68. Also shown are the previously published STAR results for similar kinematics [21] and a NLO pQCD calculation of the π0 cross-section [32]. The error band represents the uncertainty in the calculation due to scale variations.
description: No data abstract available.
DOI: 10.17182/hepdata.101343.v1/t3
title: "Figure 4 (bottom)" of "Transverse Single-Spin Asymmetry and Cross-Section for pi0 and eta Mesons at Large Feynman-x in Polarized p+p Collisions at sqrt(s)=200 GeV"

description: The $\eta$ to $\pi^0$ cross-section ratio is shown in the bottom panel. The error bars indicate the total statistical and systematic uncertainties.
description: No data abstract available.
DOI: 10.17182/hepdata.101343.v1/t4
title: "Figure 5" of "Transverse Single-Spin Asymmetry and Cross-Section for pi0 and eta Mesons at Large Feynman-x in Polarized p+p Collisions at sqrt(s)=200 GeV"

description: $A_N$ vs. $x_F$ at average pseudorapidity of 3.68 for $\pi^0$ and $\eta$. Also shown are the previously published results for $\pi^0$ at lower $x_F$ , derived from the same data set but without the center cut [12]. The error bars are statistical uncertainties only. The error boxes indicate the systematic uncertainties.
description: No data abstract available.
DOI: 10.17182/hepdata.101345.v2/t2
title: "Figure 3a" of "Long range rapidity correlations and jet production in high energy nuclear collisions"

description: FIG. 3. Left panel: width of Gaussian fit to jet-like peak for Eq. (6) $(\Delta \eta$ width, circles) and Eq. (7) $(\Delta \phi$ width, triangles) ; $ 2 \mathrm{GeV}/c
description: The STAR Collaboration at the Relativistic Heavy lon Collider presents a systematic study of hightransverse-momentum charged-di-hadron correlations at small azimuthal pair separation $\Delta \phi$ in $d+\mathrm{Au}$ and central $\mathrm{Au}+$ Au collisions at $\sqrt{s_{N N}}=200 \mathrm{GeV}$. Significant correlated yield for pairs with large longitudinal separation $\Delta \eta$ is observed in central $\mathrm{Au}+\mathrm{Au}$ collisions, in contrast to $d+\mathrm{Au}$ collisions. The associated yield distribution in $\Delta \eta \times \Delta \phi$ can be decomposed into a narrow jet-like peak at small angular separation which has a similar shape to that found in $d+$ Au collisions, and a component that is narrow in $\Delta \phi$ and depends only weakly on $\Delta \eta$, the "ridge." Using two systematically independent determinations of the background normalization and shape, finite ridge yield is found to persist for trigger $p_{t}&gt;6 \mathrm{GeV} / c$, indicating that it is correlated with jet production. The transverse-momentum spectrum of hadrons comprising the ridge is found to be similar to that of bulk particle production in the measured range $\left(2
DOI: 10.17182/hepdata.101345.v2/t5
title: "Figure 5" of "Long range rapidity correlations and jet production in high energy nuclear collisions"

description: FIG. 5. Projection of $d N /\left.d \Delta \phi\right|_{a, b}$ for $0.7&lt;|\Delta \eta|&lt;1.4$ [Eq. (3)] in two trigger $p_{t}$ windows for $2
description: The STAR Collaboration at the Relativistic Heavy lon Collider presents a systematic study of hightransverse-momentum charged-di-hadron correlations at small azimuthal pair separation $\Delta \phi$ in $d+\mathrm{Au}$ and central $\mathrm{Au}+$ Au collisions at $\sqrt{s_{N N}}=200 \mathrm{GeV}$. Significant correlated yield for pairs with large longitudinal separation $\Delta \eta$ is observed in central $\mathrm{Au}+\mathrm{Au}$ collisions, in contrast to $d+\mathrm{Au}$ collisions. The associated yield distribution in $\Delta \eta \times \Delta \phi$ can be decomposed into a narrow jet-like peak at small angular separation which has a similar shape to that found in $d+$ Au collisions, and a component that is narrow in $\Delta \phi$ and depends only weakly on $\Delta \eta$, the "ridge." Using two systematically independent determinations of the background normalization and shape, finite ridge yield is found to persist for trigger $p_{t}&gt;6 \mathrm{GeV} / c$, indicating that it is correlated with jet production. The transverse-momentum spectrum of hadrons comprising the ridge is found to be similar to that of bulk particle production in the measured range $\left(2