{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.72236.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/1340691"}},{"@id":"https://doi.org/10.1016/j.physletb.2015.08.044","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"STAR Collaboration"},"creator":{"@type":"Organization","name":"STAR Collaboration"},"datePublished":"2016","description":"BNL-RHIC.  The acceptance-corrected dielectron excess mass spectra, where the known hadronic sources have been subtracted from the inclusive dielectron mass spectra, are reported for the first time at mid-rapidity $|y_{ee}|<1$ in minimum-bias Au+Au collisions at $\\sqrt{s_{NN}}$ = 19.6 and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened $\\rho$ spectral function for $M_{ee}<1.1$ GeV/$c^{2}$. The integrated dielectron excess yield at $\\sqrt{s_{NN}}$ = 19.6 GeV for $0.4<M_{ee}<0.75$ GeV/$c^2$, normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In+In collisions at $\\sqrt{s_{NN}}$ = 17.3 GeV. For $\\sqrt{s_{NN}}$ = 200 GeV, the normalized excess yield in central collisions is higher than that at $\\sqrt{s_{NN}}$ = 17.3 GeV and increases from peripheral to central collisions. These measurements indicate that the lifetime of the hot, dense medium created in central Au+Au collisions at $\\sqrt{s_{NN}}$ = 200 GeV is longer than those in peripheral collisions and at lower energies.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.72236.v1/t1","@type":"Dataset","description":"Reconstructed dielectron unlike-sign pairs, like-sign pairs and signal distributions, together with the signal to background ratio (S/B). All columns are...","name":"Table 1"},{"@id":"https://doi.org/10.17182/hepdata.72236.v1/t2","@type":"Dataset","description":"Dielectron invariant mass spectrum in the STAR acceptance (|$y_{ee}$| < 1, 0.2 < $p_T^e$ < 3 GeV/c, |$\\eta^e$ | <...","name":"Table 2"},{"@id":"https://doi.org/10.17182/hepdata.72236.v1/t3","@type":"Dataset","description":"Hadronic cocktail consisting of the decays of light hadrons and correlated decays of charm in Au+Au collisions at $\\sqrt{s_{NN}}$ =...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.72236.v1/t4","@type":"Dataset","description":"The acceptance-corrected excess dielectron mass spectra, normalized to the charged particle multiplicity at mid-rapidity dNch/dy, in Au+Au collisions at $\\sqrt{s_{NN}}$...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.72236.v1/t5","@type":"Dataset","description":"The acceptance-corrected excess dielectron mass spectra, normalized to the charged particle multiplicity at mid-rapidity dNch/dy, in Au+Au collisions at $\\sqrt{s_{NN}}$...","name":"Table 5"},{"@id":"https://doi.org/10.17182/hepdata.72236.v1/t6","@type":"Dataset","description":"Integrated yields of the normalized dilepton excesses for 0.4 < $M^{ll}$ < 0.75 GeV/c$^2$ as a function of dNch/dy. From...","name":"Table 6"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins1340691?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/72236"}],"inLanguage":"en","name":"Energy dependence of acceptance-corrected dielectron excess mass spectrum at mid-rapidity in Au+Au collisions at $\\sqrt{s_{NN}} = 19.6$ and 200 GeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins1340691?version=1","version":1}