{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.100234.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1838481"}},{"@id":"https://doi.org/10.1103/PhysRevLett.126.162301","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2022","description":"Global polarization of $\\Xi$ and $\\Omega$ hyperons has been measured for the first time in Au+Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV. The measurements of the $\\Xi^-$ and $\\bar{\\Xi}^+$ hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay $\\Xi\\rightarrow\\Lambda+\\pi$, as well as by measuring the polarization of the daughter $\\Lambda$-hyperon, polarized via polarization transfer from its parent. The polarization, obtained by combining the results from the two methods and averaged over $\\Xi^-$ and $\\bar{\\Xi}^+$, is measured to be $\\langle P_{\\Xi}\\rangle$ = 0.47 $\\pm$ 0.10 (stat.) $\\pm$ 0.23 (syst.) % for the collision centrality 20%-80%. The $\\langle P_{\\Xi}\\rangle$ is found to be slightly larger than the inclusive $\\Lambda$ polarization and in reasonable agreement with a multiphase transport model. The $\\langle P_{\\Xi}\\rangle$\u27e8P\u039e\u27e9 is found to follow the centrality dependence of the vorticity predicted in the model, increasing toward more peripheral collisions. The global polarization of $\\Omega$, $\\langle P_{\\Omega}\\rangle$ = 1.11 $\\pm$ 0.87 (stat.) $\\pm$ 1.97 (syst.) % was obtained by measuring the polarization of daughter $\\Lambda$ in the decay $\\Omega\\rightarrow\\Lambda+K$, assuming the polarization transfer factor $C_{\\Omega\\Lambda}$ = 1.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.100234.v1/t1","@type":"Dataset","description":"$\\Xi$ and $\\Omega$ global polarization in Au+Au collisions at 200 GeV. Decay parameter from PDG2020, $\\alpha_{\\Xi}$=-$\\alpha_{\\bar{\\Xi}}$=-0.401, is used.","name":"Figure 2.0"},{"@id":"https://doi.org/10.17182/hepdata.100234.v1/t2","@type":"Dataset","description":"The energy dependence of $\\Lambda$ and $\\bar{\\Lambda}$ global polarization. Note that the results from previous measurements are rescaled using updated...","name":"Figure 2.1"},{"@id":"https://doi.org/10.17182/hepdata.100234.v1/t3","@type":"Dataset","description":"Centrality dependence of $\\Xi$ global poalrization in Au+Au collisions at 200 GeV. Decay parameter from PDG2020, $\\alpha_{\\Xi}$=-$\\alpha_{\\bar{\\Xi}}$=-0.401, is used.","name":"Figure 3.0"},{"@id":"https://doi.org/10.17182/hepdata.100234.v1/t4","@type":"Dataset","description":"Centrality dependence of $\\Lambda$ global polarization in Au+Au collisions at 200 GeV. Note that the results from previous measurement are...","name":"Figure 3.1"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1838481?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/100234"}],"inLanguage":"en","name":"Global polarization of $\\Xi$ and $\\Omega$ hyperons 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/ins1838481?version=1","version":1}