{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.99156.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/836952"}},{"@id":"https://doi.org/10.1103/PhysRevD.80.111108","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2020","description":"We report a measurement of the longitudinal double-spin asymmetry $A_{LL}$ and the differential cross section for inclusive $\\pi^0$ production at midrapidity in polarized proton collisions at $\\sqrt{s}$ = 200 GeV. The cross section was measured over a transverse momentum range of 1 < $p_T$ < 17 GeV/c and found to be in good agreement with a next-to-leading order perturbative QCD calculation. The longitudinal double-spin asymmetry was measured in the range of 3.7 < $p_T$ < 11 GeV/c and excludes a maximal positive gluon polarization in the proton. The mean transverse momentum fraction of $\\pi^0$s in their parent jets was found to be around 0.7 for electromagnetically triggered events.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.99156.v1/t1","@type":"Dataset","description":"Cross sections for inclusive $\\pi^0$ production in p + p and d + Au collisions at $\\sqrt{s}$ = 200 GeV,...","name":"Figure 1a"},{"@id":"https://doi.org/10.17182/hepdata.99156.v1/t2","@type":"Dataset","description":"Mean transverse momentum fraction of $\\pi^0$s in their associated jets, as a function of pion $p_T$, for electromagnetically triggered events....","name":"Figure 2a"},{"@id":"https://doi.org/10.17182/hepdata.99156.v1/t3","@type":"Dataset","description":"Longitudinal double-spin asymmetry for inclusive $\\pi^0$ production at midrapidity in p+p collisions at $\\sqrt{s}$ = 200 GeV, compared to NLO...","name":"Figure 3"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins836952?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/99156"}],"inLanguage":"en","name":"Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production at midrapidity in polarized proton collisions at sqrt(s) = 200 GeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins836952?version=1","version":1}