Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-07-24
Nucl.Phys.A830:491c-494c,2009
Physics
Nuclear Physics
Nuclear Theory
talk given at the 21st International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2009), to be pu
Scientific paper
10.1016/j.nuclphysa.2009.10.106
Dilepton production in In+In collisions at 158 AGeV is studied within the microscopic Parton-Hadron-Strings 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 shows that the low mass dilepton spectra are well described by including a collisional broadening of vector mesons, while the spectra in the intermediate mass range are dominated by off-shell quark-antiquark annihilation in the nonperturbative QGP. In particular, the observed softening of the mT spectra at intermediate masses is reproduced.
Bratkovskaya Elena L.
Cassing Wolfgang
Linnyk Olena
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