Energy Dependence Of Acceptance-corrected Dielectron Excess Mass Spectrum At Mid-rapidity In Au+au Collisions At √snn=19.6 And 200 Gev

dc.date2015
dc.date2016-06-03T20:14:13Z
dc.date2016-06-03T20:14:13Z
dc.date.accessioned2018-03-29T01:33:08Z
dc.date.available2018-03-29T01:33:08Z
dc.identifier
dc.identifierPhysics Letters, Section B: Nuclear, Elementary Particle And High-energy Physics. Elsevier, v. 750, p. 64 - 71, 2015.
dc.identifier3702693
dc.identifier10.1016/j.physletb.2015.08.044
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84940398947&partnerID=40&md5=9bfeab1a4fd779337d5ea720ede553f2
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/238191
dc.identifier2-s2.0-84940398947
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1304852
dc.descriptionThe 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 |yee|<1 in minimum-bias Au+Au collisions at √sNN=19.6 and 200 GeV. The excess mass spectra are consistently described by a model calculation with a broadened ρ spectral function for Mee<1.1 GeV/c2. The integrated dielectron excess yield at √sNN=19.6 GeV for 0.4<Mee<0.75 GeV/c2, normalized to the charged particle multiplicity at mid-rapidity, has a value similar to that in In+In collisions at √sNN=17.3 GeV. For √sNN=200 GeV, the normalized excess yield in central collisions is higher than that at √sNN=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 √sNN=200 GeV is longer than those in peripheral collisions and at lower energies. © 2015 The Authors.
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dc.languageen
dc.publisherElsevier
dc.relationPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.rightsaberto
dc.sourceScopus
dc.titleEnergy Dependence Of Acceptance-corrected Dielectron Excess Mass Spectrum At Mid-rapidity In Au+au Collisions At √snn=19.6 And 200 Gev
dc.typeArtículos de revistas


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