cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.145190.v1/t74
title: "Figure 37b pt.9" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: (Color online) $p_T$ spectra of $e^+e^-$ pairs in $p$+$p$ (left) and Au+Au (right) collisions for different mass bins, which are fully acceptance corrected. Au+Au spectra are divided by $N_{part}/2$. The solid curves show the expectations from the sum of the hadronic decay cocktail and the contribution from charmed mesons. The dashed curves show the sum of the cocktail and charmed meson contributions plus the contribution from direct photons calculated by converting the photon yield from Fig. 34 to the $e^+e^-$ pair yield using Eqs. (31) and (B14). Au$+$Au collision data shown.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t75
title: "Figure 37b pt.10" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: (Color online) $p_T$ spectra of $e^+e^-$ pairs in $p$+$p$ (left) and Au+Au (right) collisions for different mass bins, which are fully acceptance corrected. Au+Au spectra are divided by $N_{part}/2$. The solid curves show the expectations from the sum of the hadronic decay cocktail and the contribution from charmed mesons. The dashed curves show the sum of the cocktail and charmed meson contributions plus the contribution from direct photons calculated by converting the photon yield from Fig. 34 to the $e^+e^-$ pair yield using Eqs. (31) and (B14). Au$+$Au collision data shown.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t76
title: "Figure 38" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: The $m_{T} - m_{0}$ spectrum for the mass range 0.3 &lt; $m_{ee}$ &lt; 0.75 GeV/$c^{2}$ after subtracting contributions from cocktail and charm. The spectrum is fully acceptance corrected. The systematic error band includes the difference in charm yields in this mass range. The spectrum is fit to the sum of two exponential functions which are also shown separately as the dashed and dotted lines. The solid line is the sum.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t77
title: "Figure 40a" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: Local inverse slope of the $m_{T}$ spectra of electron pairs, after subtracting the cocktail and the charm contribution, for different mass bins. The local slope is calculated in different mass ranges, 0 &lt; $m_{T} - m_{0}$ &lt; 0.6 GeV/$c^{2}$ and 0.6 &lt; $m_{T} - m_{0}$ &lt; 2.5 GeV/$c^{2}$. The solid and dashed lines show the local slope of the cocktail for the corresponding mass ranges.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t78
title: "Figure 40b" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: Local inverse slope of the $m_{T}$ spectra of electron pairs, after subtracting the cocktail and the charm contribution, for different mass bins. The local slope is calculated in different mass ranges, 0 &lt; $m_{T} - m_{0}$ &lt; 0.6 GeV/$c^{2}$ and 0.6 &lt; $m_{T} - m_{0}$ &lt; 2.5 GeV/$c^{2}$. The solid and dashed lines show the local slope of the cocktail for the corresponding mass ranges.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t79
title: "Figure 41a" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: Invariant mass spectrum of $e^{+}e^{-}$ pairs in MB Au+Au compared to predictions from Ralf Rapp. Invariant mass spectra of $e^{+}e^{-}$ pairs in Min. Bias Au + Au collisions in the IMR. (top left) The data are compared to the sum of cocktail+charm. The data are also compared to the sum of cocktail+charm and partonic contributions from different models. The calculations are from (center) Rapp and van Hees [15, 18, 83] and (right) Dusling and Zahed [19, 84, 85]. The partonic yields (PY) have been added to the two scenarios for charmed mesons decays, i.e. (i) $PYTHIA$ and (ii) random $c\bar{c}$ correlation.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t80
title: "Figure 41b" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: Invariant mass spectrum of $e^{+}e^{-}$ pairs in MB Au+Au compared to predictions from Kevin Dusling. Invariant mass spectra of $e^{+}e^{-}$ pairs in Min. Bias Au + Au collisions in the IMR. (top left) The data are compared to the sum of cocktail+charm. The data are also compared to the sum of cocktail+charm and partonic contributions from different models. The calculations are from (center) Rapp and van Hees [15, 18, 83] and (right) Dusling and Zahed [19, 84, 85]. The partonic yields (PY) have been added to the two scenarios for charmed mesons decays, i.e. (i) $PYTHIA$ and (ii) random $c\bar{c}$ correlation.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t81
title: "Figure 41c" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: Invariant mass spectrum of $e^{+}e^{-}$ pairs in MB Au+Au compared to predictions from Elena Bratkovskaya. Invariant mass spectra of $e^{+}e^{-}$ pairs in Min. Bias Au + Au collisions in the IMR. (top left) The data are compared to the sum of cocktail+charm. The data are also compared to the sum of cocktail+charm and partonic contributions from different models. The calculations are from (center) Rapp and van Hees [15, 18, 83] and (right) Dusling and Zahed [19, 84, 85]. The partonic yields (PY) have been added to the two scenarios for charmed mesons decays, i.e. (i) $PYTHIA$ and (ii) random $c\bar{c}$ correlation.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t82
title: "Figure 42a pt.1" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: invariant mass spectrum of e+e- pairs in MB Au+Au compared to predictions from Ralf Rapp.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.
DOI: 10.17182/hepdata.145190.v1/t83
title: "Figure 42a pt.2" of "Detailed measurement of the $e^+ e^-$ pair continuum in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV and implications for direct photon production"

description: invariant mass spectrum of e+e- pairs in MB Au+Au compared to predictions from Ralf Rapp.
description: PHENIX has measured the $e^{+}e^{-}$ pair continuum in $\sqrt{s_{NN}}$=200 GeV Au+Au and $p+p$ collisions over a wide range of mass and transverse momenta. The $e^{+}e^{-}$ yield is compared to the expectations from hadronic sources, based on PHENIX measurements. In the intermediate mass region, between the masses of the $\phi$ and the $J/\psi$ meson, the yield is consistent with expectations from correlated $c\bar c$ production, though other mechanisms are not ruled out. In the low mass region (below the $\phi$) the $p+p$ inclusive mass spectrum is well described by known contributions from light meson decays. In contrast, the Au+Au minimum bias inclusive mass spectrum in this region shows an enhancement by a factor of $4.7\pm 0.4^{stat}\pm 1.5^{syst}\pm 0.9^{model}$ At low mass ($m_{ee}$&lt;0.3 GeV/$c^{2}$) and high $p_{T}$ (1&lt;$p_{T}$&lt;5 GeV/$c$) an enhanced $e^{+}e^{-}$ pair yield is observed that is consistent with production of virtual direct photons. This excess is used to infer the yield of real direct photons. In central Au+Au collisions, the excess of the direct photon yield over the $p+p$ is exponential in $p_{T}$, with inverse slope $T = 221\pm 19^{stat}\pm 19^{syst}$ MeV. Hydrodynamical models with initial temperatures ranging from $T_{init} \cong$300--600 MeV at times of 0.6--0.15 fm/$c$ after the collision are in qualitative agreement with the direct photon data in Au+Au. For low $p_{T}$&lt;1 GeV/$c$ the low mass region shows a further significant enhancement that increases with centrality and has an inverse slope of $T\cong$100 MeV. Theoretical models under predict the low mass, low $p_{T}$ enhancement. Error values of 9.99E+9 represent upper limit errors.