cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.101351.v1/t1
title: "Table 1a" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Midrapidity $(|y| &lt; 0.5)$ transverse momentum spectra of $\phi$ mesons for various collision centrality classes for $Cu+Cu$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV. To study the system size dependence, comparison of $40-50\%$ $Au+Au$ spectra to $10-20\%$ $Cu+Cu$ spectra at 200 GeV, and $40-60\%$ $Au+Au$ spectra to $20-30\%$ $Cu+Cu$ spectra at 62.4 GeV are shown. These centralities for the two colliding systems have similar $\langle N_{\scriptsize{\mbox{part}}}\rangle$ values as outlined in Table 2. The errors represent the statistical and systematic errors added in quadrature. They are found to be within the symbol size. The spectra are fitted to a Levy function discussed in the text.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t3
title: "Table 2a" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Upper panels. $N_{\scriptsize{\mbox{part}}}$ scaled ($R^{N_{\scriptsize{\mbox{part}}}}_{AA}$) nuclear modification factors as a function of $p_{T}$ of $\phi$ mesons for $0-10\%$ and $20-30\%$ $Cu+Cu$ and $Au+Au$ collisions at $\sqrt{s_{NN}}=200$ GeV. Lower panel. Same as above for $N_{\scriptsize{\mbox{bin}}}$ scaled ($R^{N_{\scriptsize{\mbox{bin}}}}_{AA}$) nuclear modification factor. The error bars represent the statistical and systematic errors added in quadrature. The shaded band in upper panel around 1 at $p_{T}=4.5-5.5$ GeV/$c$ in the right side reflects the uncertainty in $N_{\scriptsize{\mbox{part}}}$ and that on the lower panel for $N_{\scriptsize{\mbox{bin}}}$ calculation for central $Au+Au$ collisions. The respective uncertainties for central $Cu+Cu$ collisions are of similar order.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t2
title: "Table 1b" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Midrapidity $(|y| &lt; 0.5)$ transverse momentum spectra of $\phi$ mesons for various collision centrality classes for $Cu+Cu$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV. To study the system size dependence, comparison of $40-50\%$ $Au+Au$ spectra to $10-20\%$ $Cu+Cu$ spectra at 200 GeV, and $40-60\%$ $Au+Au$ spectra to $20-30\%$ $Cu+Cu$ spectra at 62.4 GeV are shown. These centralities for the two colliding systems have similar $\langle N_{\scriptsize{\mbox{part}}}\rangle$ values as outlined in Table 2. The errors represent the statistical and systematic errors added in quadrature. They are found to be within the symbol size. The spectra are fitted to a Levy function discussed in the text.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t4
title: "Table 2b" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Upper panels. $N_{\scriptsize{\mbox{part}}}$ scaled ($R^{N_{\scriptsize{\mbox{part}}}}_{AA}$) nuclear modification factors as a function of $p_{T}$ of $\phi$ mesons for $0-10\%$ and $20-30\%$ $Cu+Cu$ and $Au+Au$ collisions at $\sqrt{s_{NN}}=200$ GeV. Lower panel. Same as above for $N_{\scriptsize{\mbox{bin}}}$ scaled ($R^{N_{\scriptsize{\mbox{bin}}}}_{AA}$) nuclear modification factor. The error bars represent the statistical and systematic errors added in quadrature. The shaded band in upper panel around 1 at $p_{T}=4.5-5.5$ GeV/$c$ in the right side reflects the uncertainty in $N_{\scriptsize{\mbox{part}}}$ and that on the lower panel for $N_{\scriptsize{\mbox{bin}}}$ calculation for central $Au+Au$ collisions. The respective uncertainties for central $Cu+Cu$ collisions are of similar order.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t5
title: "Table 2c" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Upper panels. $N_{\scriptsize{\mbox{part}}}$ scaled ($R^{N_{\scriptsize{\mbox{part}}}}_{AA}$) nuclear modification factors as a function of $p_{T}$ of $\phi$ mesons for $0-10\%$ and $20-30\%$ $Cu+Cu$ and $Au+Au$ collisions at $\sqrt{s_{NN}}=200$ GeV. Lower panel. Same as above for $N_{\scriptsize{\mbox{bin}}}$ scaled ($R^{N_{\scriptsize{\mbox{bin}}}}_{AA}$) nuclear modification factor. The error bars represent the statistical and systematic errors added in quadrature. The shaded band in upper panel around 1 at $p_{T}=4.5-5.5$ GeV/$c$ in the right side reflects the uncertainty in $N_{\scriptsize{\mbox{part}}}$ and that on the lower panel for $N_{\scriptsize{\mbox{bin}}}$ calculation for central $Au+Au$ collisions. The respective uncertainties for central $Cu+Cu$ collisions are of similar order.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t6
title: "Table 2d" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Upper panels. $N_{\scriptsize{\mbox{part}}}$ scaled ($R^{N_{\scriptsize{\mbox{part}}}}_{AA}$) nuclear modification factors as a function of $p_{T}$ of $\phi$ mesons for $0-10\%$ and $20-30\%$ $Cu+Cu$ and $Au+Au$ collisions at $\sqrt{s_{NN}}=200$ GeV. Lower panel. Same as above for $N_{\scriptsize{\mbox{bin}}}$ scaled ($R^{N_{\scriptsize{\mbox{bin}}}}_{AA}$) nuclear modification factor. The error bars represent the statistical and systematic errors added in quadrature. The shaded band in upper panel around 1 at $p_{T}=4.5-5.5$ GeV/$c$ in the right side reflects the uncertainty in $N_{\scriptsize{\mbox{part}}}$ and that on the lower panel for $N_{\scriptsize{\mbox{bin}}}$ calculation for central $Au+Au$ collisions. The respective uncertainties for central $Cu+Cu$ collisions are of similar order.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t7
title: "Table 3a" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Upper panel. The ratio of the yields of $K^{−}$, $\phi$, $\bar{\Lambda}$ and $\Xi+\bar{\Xi}$ normalized to $N_{\scriptsize{\mbox{part}}}$ in nucleus-nucleus collisions to corresponding yields in inelastic $p+p$ collisions as a function of $N_{\scriptsize{\mbox{part}}}$ at 200 GeV. Lower panel. Same as above for $\phi$ mesons in $Cu+Cu$ collisions at 200 and 62.4 GeV. The $p+p$ collision data at 200 GeV are from STAR [5] and at 62.4 GeV from ISR [29]. The error bars shown represent the statistical and systematic errors added in quadrature.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101351.v1/t8
title: "Table 3b" of "Energy and system size dependence of \phi meson production in Cu+Cu and Au+Au collisions"

description: Upper panel. The ratio of the yields of $K^{−}$, $\phi$, $\bar{\Lambda}$ and $\Xi+\bar{\Xi}$ normalized to $N_{\scriptsize{\mbox{part}}}$ in nucleus-nucleus collisions to corresponding yields in inelastic $p+p$ collisions as a function of $N_{\scriptsize{\mbox{part}}}$ at 200 GeV. Lower panel. Same as above for $\phi$ mesons in $Cu+Cu$ collisions at 200 and 62.4 GeV. The $p+p$ collision data at 200 GeV are from STAR [5] and at 62.4 GeV from ISR [29]. The error bars shown represent the statistical and systematic errors added in quadrature.
description: We study the beam-energy and system-size dependence of $\phi$ meson production (using the hadronic decay mode $\phi \to K^{+}K^{-}$) by comparing the new results from $Cu+Cu$ collisions and previously reported $Au+Au$ collisions at $\sqrt{s_{NN}}=62.4$ and 200 GeV measured in the STAR experiment at RHIC. Data presented in this Letter are from mid-rapidity $(|y| &lt; 0.5)$ for $0.4 &lt; p_{T} &lt; 5$ GeV/$c$. At a given beam energy, the transverse momentum distributions for $\phi$ mesons are observed to be similar in yield and shape for $Cu+Cu$ and $Au+Au$ colliding systems with similar average numbers of participating nucleons. The $\phi$ meson yields in nucleus-nucleus collisions, normalized by the average number of participating nucleons, are found to be enhanced relative to those from $p+p$ collisions. The enhancement for $\phi$ mesons lies between strange hadrons having net strangeness = 1 ($K^{−}$ and $\bar{\Lambda}$) and net strangeness = 2 ($\Xi$). The enhancement for $\phi$ mesons is observed to be higher at $\sqrt{s_{NN}}=200$ GeV compared to 62.4 GeV. These observations for the produced $\phi (s\bar{s})$ mesons clearly suggest that, at these collision energies, the source of enhancement of strange hadrons is related to the formation of a dense partonic medium in high energy nucleus-nucleus collisions and cannot be alone due to canonical suppression of their production in smaller systems.
DOI: 10.17182/hepdata.101352.v1/t1
title: "Table 1" of "Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV"

description: Distributions of the azimuthal angle between nonphotonic electrons and charged hadrons normalized per nonphotonic electron trigger. The trigger electron has (top) $2.5 &lt; p_{T} &lt; 3.5$ GeV/$c$ and (bottom) $5.5 &lt; p_{T} &lt; 6.5$ GeV/$c$. The curves represent PYTHIA calculations for $D$ (dotted curve) and $B$ (dashed curve) decays. The fit result is shown as the black solid curve.
description: The contribution of $B$ meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in $p+p$ collisions at $\sqrt{s}=200$ GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted $B$ decay contribution is approximately $50\%$ at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.
DOI: 10.17182/hepdata.101352.v1/t2
title: "Table 2" of "Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV"

description: (a) Background-subtracted invariant mass distribution of $K$ pairs requiring at least one nonphotonic electron trigger in the event. The solid line is a Gaussian fit to the data near the peak region. (b) Distribution of the azimuthal angle between nonphotonic electron (positron) trigger particles and $D^{0}$ ($\bar{D}^{0}$). The solid (dashed) line is a fit of the correlation function from PYTHIA (MC$@$NLO) simulations to the data points.
description: The contribution of $B$ meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in $p+p$ collisions at $\sqrt{s}=200$ GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted $B$ decay contribution is approximately $50\%$ at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.
DOI: 10.17182/hepdata.101352.v1/t3
title: "Table 3" of "Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV"

description: Transverse momentum dependence of the relative contribution from $B$ mesons ($r_{B}$) to the nonphotonic electron yields. Error bars are statistical and brackets are systematic uncertainties. The solid curve is the FONLL calculation [14]. Theoretical uncertainties are indicated by the dashed curves.
description: The contribution of $B$ meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in $p+p$ collisions at $\sqrt{s}=200$ GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted $B$ decay contribution is approximately $50\%$ at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.
DOI: 10.17182/hepdata.101352.v2/t1
title: "Table 1" of "Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV"

description: Distributions of the azimuthal angle between nonphotonic electrons and charged hadrons normalized per nonphotonic electron trigger. The trigger electron has (top) $2.5 &lt; p_{T} &lt; 3.5$ GeV/$c$ and (bottom) $5.5 &lt; p_{T} &lt; 6.5$ GeV/$c$. The curves represent PYTHIA calculations for $D$ (dotted curve) and $B$ (dashed curve) decays. The fit result is shown as the black solid curve.
description: The contribution of $B$ meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in $p+p$ collisions at $\sqrt{s}=200$ GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted $B$ decay contribution is approximately $50\%$ at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.
DOI: 10.17182/hepdata.101352.v2/t2
title: "Table 2" of "Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s} $=200 GeV"

description: (a) Background-subtracted invariant mass distribution of $K$ pairs requiring at least one nonphotonic electron trigger in the event. The solid line is a Gaussian fit to the data near the peak region. (b) Distribution of the azimuthal angle between nonphotonic electron (positron) trigger particles and $D^{0}$ ($\bar{D}^{0}$). The solid (dashed) line is a fit of the correlation function from PYTHIA (MC$@$NLO) simulations to the data points.
description: The contribution of $B$ meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in $p+p$ collisions at $\sqrt{s}=200$ GeV has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted $B$ decay contribution is approximately $50\%$ at a transverse momentum of $p_{T} \geq 5$ GeV/$c$. These measurements constrain the nuclear modification factor for electrons from $B$ and $D$ meson decays. The result indicates that $B$ meson production in heavy ion collisions is also suppressed at high $p_{T}$.