Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Schwerionenkollisionen und QCD Phasen
HK 40.1: Group Report
Tuesday, March 5, 2013, 16:45–17:15, HSZ-204
Dileptons and photons produced in relativistic heavy ion collisions at SPS, RHIC and LHC — •Olena Linnyk1, Elena Bratkovskaya2,3, and Wolfgang Cassing1 — 1Justus Liebig Universität Gießen, Gießen, Deutchland — 2Johann Wolfgang Goethe Universität, Frankfurt am Main, Deutchland — 3Frankfurt Institute for Advanced Studies, Frankfurt am Main, Deutchland
We address the dilepton and photon production by the (in-medium) mesons, correlated decays of charm and bottom quarks and the quark and gluon interactions in the early stage of relativistic heavy-ion collisions within the parton-hadron-string dynamics (PHSD) off-shell transport approach. The approach treats the full evolution of a relativistic heavy-ion collision from the initial hard scatterings and string formation through the dynamical deconfinement phase transition to the strongly interacting quark-gluon plasma (QGP) as well as hadronization and to the subsequent interactions in the hadronic phase. We study the dilepton yield from the collisions at energies from SPS to RHIC to LHC. By comparing to the data of the NA60, PHENIX and STAR Collaborations, we determine the relative importance of the different dilepton production mechanisms and point out the regions in phase space where partonic channels are dominant. Explicit predictions are presented for dileptons from the Pb+Pb collisions at sqrt(s)=2.76 TeV. Additionally, the photon production under the influence of the strong magnetic fields in the initial stage of the collision is discussed.