{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.101749.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1510298"}},{"@id":"https://doi.org/10.1103/PhysRevLett.118.212301","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2021","description":"We report the first measurement of the elliptic anisotropy ($v_2$) of the charm meson $D^0$ at mid-rapidity ($|y|$$<$1) in Au+Au collisions at $\\sqrt{s_{_{\\rm NN}}}$ = 200 GeV. The measurement was conducted by the STAR experiment at RHIC utilizing a new high-resolution silicon tracker. The measured $D^0$ $v_2$ in 0-80\\% centrality Au+Au collisions can be described by a viscous hydrodynamic calculation for transverse momentum ($p_{\\rm T}$) less than 4 GeV/$c$. The $D^0$ $v_2$ as a function of transverse kinetic energy ($m_{\\rm T} - m_0$, where $m_{\\rm T} = \\sqrt{p_{\\rm T}^2 + m_0^2}$) is consistent with that of light mesons in 10-40\\% centrality Au+Au collisions. These results suggest that charm quarks have achieved local thermal equilibrium with the medium created in such collisions. Several theoretical models, with the temperature-dependent, dimensionless charm spatial diffusion coefficient ($2{\\pi}TD_s$) in the range of $\\sim$2-12, are able to simultaneously reproduce our $D^0$ $v_2$ result and our previously published results for the $D^0$ nuclear modification factor.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.101749.v1/t1","@type":"Dataset","description":"Azimuthal anisotropy $v_2$ as a function of $p_{\\rm T}$ for $D^0$ in 10%\u201340% centrality Au+Au collisions.","name":"Figure 3"},{"@id":"https://doi.org/10.17182/hepdata.101749.v1/t2","@type":"Dataset","description":"Azimuthal anisotropy $v_2$ as a function of $p_{\\rm T}$ for $D^0$ in 0%\u201380% centrality Au+Au collisions.","name":"Figure 4"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1510298?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/101749"}],"inLanguage":"en","name":"Measurement of $D^0$ azimuthal anisotropy at mid-rapidity in Au+Au collisions at \\sNN = 200\\,GeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1510298?version=1","version":1}