{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.98968.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/710186"}},{"@id":"https://doi.org/10.1103/PhysRevLett.97.152302","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2021","description":"Measurements of the production of forward $\\pi^{0}$ mesons from p+p and d+Au collisions at $\\sqrt{s_{NN}}$= 200 GeV are reported. The p+p yield generally agrees with next-to-leading order perturbative QCD calculations. The d+Au yield per binary collision is suppressed as $\\eta$ increases, decreasing to ~30% of the p+p yield at $\\langle\\eta\\rangle$= 4.00, well below shadowing expectations. Exploratory measurements of azimuthal correlations of the forward $\\pi^{0}$ with charged hadrons at $\\eta\\approx0$ show a recoil peak in p+p that is suppressed in d+Au at low pion energy. These observations are qualitatively consistent with a saturation picture of the low-x gluon structure of heavy nuclei.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t1","@type":"Dataset","description":"Inclusive $\\pi^{0}$ cross section for p+p collisions versus the leading $\\pi^{0}$ energy ($E_{\\pi}$) averaged over 5 GeV bins at fixed...","name":"Figure 1"},{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t2","@type":"Dataset","description":"Inclusive $\\pi^{0}$ cross section per binary collision for d+Au collisions, as in Fig. 1. The curves are calculations described in...","name":"Figure 2"},{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t3","@type":"Dataset","description":"Nuclear modification factor ($R_{dAu}$) for minimum-bias d+Au collisions versus transverse momentum ($p_{T}$). The solid circles are for $\\pi^{0}$ mesons. The...","name":"Figure 3"},{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t4","@type":"Dataset","description":"Coincidence probability versus azimuthal angle difference between the forward $\\pi^{0}$ and a leading charged particle at midrapidity with $p_{T}$ >...","name":"Figure 4 top left"},{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t5","@type":"Dataset","description":"Coincidence probability versus azimuthal angle difference between the forward $\\pi^{0}$ and a leading charged particle at midrapidity with $p_{T}$ >...","name":"Figure 4 bottom left"},{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t6","@type":"Dataset","description":"Coincidence probability versus azimuthal angle difference between the forward $\\pi^{0}$ and a leading charged particle at midrapidity with $p_{T}$ >...","name":"Figure 4 top right"},{"@id":"https://doi.org/10.17182/hepdata.98968.v1/t7","@type":"Dataset","description":"Coincidence probability versus azimuthal angle difference between the forward $\\pi^{0}$ and a leading charged particle at midrapidity with $p_{T}$ >...","name":"Figure 4 bottom right"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins710186?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/98968"}],"inLanguage":"en","name":"Forward neutral pion production in p+p and d+Au collisions at s(NN)**(1/2) = 200-GeV.","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins710186?version=1","version":1}