cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.9b7bwb
title: Occurrence Download

description: A dataset containing 474 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "TaxonKey is one of (Eurycea spelaea)"
 ]
}

 The dataset includes 474 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014609-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.abvaab
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Erigeron bonariensis",
 "Country is Poland",
 "HasCoordinate is true"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014611-250711103210423/datasets/export for details.
DOI: 10.15468/dl.ey2vhr
title: Occurrence Download

description: A dataset containing 1330 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Lantana camara",
 "Country is Tanzania, United Republic of",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1330 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014612-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.cc9eqr
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Erigeron bonariensis",
 "Country is Qatar",
 "HasCoordinate is true"
 ]
}

 The dataset includes 2 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014613-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.pqcect
title: Occurrence Download

description: A dataset containing 19221 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Labidesthes sicculus"
 ]
}

 The dataset includes 19221 records from 77 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014614-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ryq7ce
title: Occurrence Download

description: A dataset containing 106 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "TaxonKey is one of (Eurycea sphagnicola)"
 ]
}

 The dataset includes 106 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014616-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.r5dnch
title: Occurrence Download

description: A dataset containing 26 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Erysimum cyaneum"
 ]
}

 The dataset includes 26 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0014615-250711103210423/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.d4gnbd
title: Occurrence Download

description: A dataset containing 74279 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Thunnus obesus",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 74279 records from 74 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015987-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17182/hepdata.146532.v1/t1
title: "Table 1" of "Measurement of the forward $\eta$ meson production rate in p-p collisions at $\sqrt{s}$=13 TeV with the LHCf-Arm2 detector"

description: Inclusive eta production rate in $p_{T}&lt;1.10\,GeV/c$
description: Inclusive production rate of forward eta meson produced in p-p collisions at $\mathrm{\sqrt{s}=13\,TeV}$. Production rate is expressed as a function of Feynman $x_{F}$ variable in $p_{T}&lt;1.10\,GeV/c$
DOI: 10.17182/hepdata.146557.v1/t1
title: "Table 1" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Average away-side $I^{head}_{AA}$ above 2 GeV/$c$ for various $\pi^0$ trigger momenta in central and midcentral collisions where $|\Delta\phi - \pi| &lt; \pi/6$. Note: a 6% scale uncertainty applies to all $I_{AA}$ values.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t2
title: "Figure 2a" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side jet widths from a Gaussian fit by $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta in $p+p$ collisions.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t3
title: "Figure 2b" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side jet widths from a Gaussian fit by $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta in Au+Au collisions.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t4
title: "Figure 2c" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side jet widths from a Gaussian fit by $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta in Au+Au collisions.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t10
title: "Fig. 2 Supplemental b" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Supplemental near-side jet widths from a Gaussian fit by $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta in Au+Au collisions.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t5
title: "Figure 3a" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side $I_{AA}$ for the entire away-side $|\Delta \phi - \pi| &lt; \pi /2$ selection vs. $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta. A point-to-point uncorrelated 6% normalization uncertainty (mainly due to efficiency corrections) applies to all measurements.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t6
title: "Figure 3b" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side $I_{AA}$ for the entire away-side $|\Delta \phi - \pi| &lt; \pi /2$ selection vs. $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta. A point-to-point uncorrelated 6% normalization uncertainty (mainly due to efficiency corrections) applies to all measurements.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t7
title: "Figure 3c" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side $I_{AA}$ for a narrow “head” $|\Delta \phi - \pi| &lt; \pi /6$ selection vs. $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta. A point-to-point uncorrelated 6% normalization uncertainty (mainly due to efficiency corrections) applies to all measurements.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t8
title: "Figure 3d" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Away-side $I_{AA}$ for a narrow “head” $|\Delta \phi - \pi| &lt; \pi /6$ selection vs. $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta. A point-to-point uncorrelated 6% normalization uncertainty (mainly due to efficiency corrections) applies to all measurements.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t9
title: "Fig. 2 Supplemental a" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Supplemental near-side jet widths from a Gaussian fit by $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta in $p+p$ collisions.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t11
title: "Fig. 2 Supplemental c" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Supplemental near-side jet widths from a Gaussian fit by $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta in Au+Au collisions.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t12
title: "Fig. 3 Supplemental a" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Supplemental away-side $I_{AA}$ for $|\Delta \phi - \pi| &lt; \pi /3$ selection vs. $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta. A point-to-point uncorrelated 6% normalization uncertainty (mainly due to efficiency corrections) applies to all measurements.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).
DOI: 10.17182/hepdata.146557.v1/t13
title: "Fig. 3 Supplemental b" of "Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions"

description: Supplemental away-side $I_{AA}$ for $|\Delta \phi - \pi| &lt; \pi /3$ selection vs. $h^{\pm}$ partner momentum for various $\pi^0$ trigger momenta. A point-to-point uncorrelated 6% normalization uncertainty (mainly due to efficiency corrections) applies to all measurements.
description: BNL-RHIC. Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of $\pi^0$ trigger particles at transverse momenta $p^t_T$ = 4–12 GeV/$c$ and associated charged hadrons ($p^a_T$ = 0.5–7 GeV/$c$) vs. relative azimuthal angle $\Delta \phi$ in Au$\mathord{+}$Au and $p\mathord{+}p$ collisions at $\sqrt{s_{NN}}$ = 200 GeV. The Au$\mathord{+}$Au $\Delta\phi$ distribution at low $p^a_T$, whose shape has been interpreted as a medium effect, is modified for $p^t_T$ $&lt;$ 7 GeV/$c$. At higher $p^t_T$, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured $p^a_T$, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au$\mathord{+}$Au relative to $p\mathord{+}p$ ($I_{AA}$) is suppressed at high $p_T$ ($I_{AA}$ $\approx$ 0.35–0.5), but less than for inclusive suppression ($R_{AA}$ $\approx$ 0.2).