Dilepton production in the strongly interacting quark-gluon plasma
arXiv:1012.0252 · doi:10.1016/j.nuclphysa.2011.02.057
Abstract
Dilepton production in relativistic heavy-ion collisions is studied within the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach, which is based on a dynamical quasiparticle model (DQPM) matched to reproduce lattice QCD results in thermodynamic equilibrium. A comparison to the data of the NA60 Collaboration for In+In collisions at 158 AGeV shows that the dilepton spectra are well described by the sum of hadronic and partonic sources, if a collisional broadening of vector mesons is taken into account as well as the off-shell quark-antiquark annihilation (q+qbar->l^+l^- and q+qbar->gl^+l^-) in the QGP. In particular, the observed softening of the mT spectra at intermediate masses is reproduced. The data of the PHENIX collaboration on dilepton production in Au+Au collisions at sqrt(s)=200 GeV for masses above 1 GeV are found to be dominated by the contributions of the QGP radiation and the charm meson decays, while the measured spectrum is underestimated in the mass range from 0.2 to 0.6 GeV.
Talk given at the 4th International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions (Hard Probes 2010), 10 to 15 of October, 2010, Eilat, Israel
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Cited by in corpus (7)
- Tomography of the Quark-Gluon-Plasma by Charm Quarks
- Charm production in Pb+Pb collisions at the Large Hadron Collider energy
- Chiral symmetry restoration in heavy-ion collisions at intermediate energies
- Chiral symmetry restoration versus deconfinement in heavy-ion collisions at high baryon density
- Dilepton production in nucleus-nucleus collisions at top SPS energy within the Parton-Hadron-String Dynamics (PHSD) transport approach
- Dilepton production in p+p, Cu+Cu and Au+Au collisions at 200 AGeV
- Traces of non-equilibrium effects, initial condition, bulk dynamics and elementary collisions in the charm observables