{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.96845.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/825863"}},{"@id":"https://doi.org/10.1103/PhysRevC.80.044905","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2020","description":"The results of mid-rapidity ($0 < y < 0.8$) neutral pion spectra over an extended transverse momentum range ($1 < p_T < 12$ GeV/$c$) in $\\sqrt{s_{NN}}$ = 200 GeV Au+Au collisions, measured by the STAR experiment, are presented. The neutral pions are reconstructed from photons measured either by the STAR Barrel Electro-Magnetic Calorimeter (BEMC) or by the Time Projection Chamber (TPC) via tracking of conversion electron-positron pairs. Our measurements are compared to previously published $\\pi^{\\pm}$ and $\\pi^0$ results. The nuclear modification factors $R_{\\mathrm{CP}}$ and $R_{\\mathrm{AA}}$ of $\\pi^0$ are also presented as a function of $p_T$ . In the most central Au+Au collisions, the binary collision scaled $\\pi^0$ yield at high $p_T$ is suppressed by a factor of about 5 compared to the expectation from the yield of p+p collisions. Such a large suppression is in agreement with previous observations for light quark mesons and is consistent with the scenario that partons suffer considerable energy loss in the dense medium formed in central nucleus-nucleus collisions at RHIC.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t1","@type":"Dataset","description":"The diphoton invariant mass distributions using the EMC-TPC method in 0-20% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 1 a, b"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t2","@type":"Dataset","description":"The diphoton invariant mass distributions using the EMC-TPC method in 0-20% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 1 c, d"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t3","@type":"Dataset","description":"The diphoton invariant mass distributions using the EMC-EMC method in 0-20% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 2"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t4","@type":"Dataset","description":"The $\\pi^0$ invariant mass peak positions and widths as a function of $p_{T}$ in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 3 (exp, EMC-TPC, MB)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t5","@type":"Dataset","description":"The $\\pi^0$ invariant mass peak positions and widths as a function of $p_{T}$ in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 3 (exp, EMC-TPC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t6","@type":"Dataset","description":"The $\\pi^0$ invariant mass peak positions and widths as a function of $p_{T}$ in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 3 (exp, EMC-EMC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t7","@type":"Dataset","description":"The $\\pi^0$ invariant mass peak positions and widths as a function of $p_{T}$ in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 3 (sim, EMC-TPC, MB)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t8","@type":"Dataset","description":"The $\\pi^0$ invariant mass peak positions and widths as a function of $p_{T}$ in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 3 (sim, EMC-TPC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t9","@type":"Dataset","description":"The $\\pi^0$ invariant mass peak positions and widths as a function of $p_{T}$ in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 3 (sim, EMC-EMC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t10","@type":"Dataset","description":"Photon conversion point radius distribution from real data and MC simulation in Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 4 (left)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t11","@type":"Dataset","description":"Conversion probability correction factor for $\\pi^0$ as a function of $p_{T}$","name":"Figure 4 (right)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t12","@type":"Dataset","description":"The overall detection efficiency of $\\pi^0$ from embedding studt in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 5 (exp, EMC-TPC, MB)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t13","@type":"Dataset","description":"The overall detection efficiency of $\\pi^0$ from embedding studt in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 5 (exp, EMC-TPC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t14","@type":"Dataset","description":"The overall detection efficiency of $\\pi^0$ from embedding studt in 0-80% Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 5 (exp, EMC-EMC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t15","@type":"Dataset","description":"Invariant yield of STAR $\\pi^0$ as a function of $p_{T}$ at midrapidity for different collision centrality bins in Au+Au collisions...","name":"Figure 6 (EMC-TPC, MB)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t16","@type":"Dataset","description":"Invariant yield of STAR $\\pi^0$ as a function of $p_{T}$ at midrapidity for different collision centrality bins in Au+Au collisions...","name":"Figure 6 (EMC-TPC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t17","@type":"Dataset","description":"Invariant yield of STAR $\\pi^0$ as a function of $p_{T}$ at midrapidity for different collision centrality bins in Au+Au collisions...","name":"Figure 6 (EMC-EMC, HT)"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t18","@type":"Dataset","description":"The ratios of STAR $\\pi^0$ spectra over $\\pi^{\\pm}$ from STAR and $\\pi^0$ from PHENIX for different collision centrality bins in...","name":"Figure 7"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t19","@type":"Dataset","description":"The nuclear modification factor $R_{CP}$ as a functon of $p_{T}$ of STAR $\\pi^0$ in Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 8"},{"@id":"https://doi.org/10.17182/hepdata.96845.v1/t20","@type":"Dataset","description":"The nuclear modification factor $R_{AA}$ as a functon of $p_{T}$ of STAR $\\pi^0$ in Au+Au collisions at $\\sqrt{s_{NN}}=200$ GeV.","name":"Figure 9"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins825863?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/96845"}],"inLanguage":"en","name":"Neutral Pion Production in Au+Au Collisions at $\\sqrt{s_{NN}}$ = 200 GeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins825863?version=1","version":1}