TY  - JOUR
A1  - Bratkovskaya, Elena L.
A1  - Linnyk, Olena
A1  - Cassing, Wolfgang
T1  - Electromagnetic probes of the QGP
T2  - EPJ Web of Conferences
N2  - We investigate the properties of the QCD matter across the deconfinement phase transition in the scope of the parton-hadron string dynamics (PHSD) transport approach. We present here in particular the results on the electromagnetic radiation, i.e. photon and dilepton production, in relativistic heavy-ion collisions. By comparing our calculations for the heavy-ion collisions to the available data, we determine the relative importance of the various production sources and address the possible origin of the observed strong elliptic flow v2 of direct photons. We argue that the different centrality dependence of the hadronic and partonic sources for direct photon production in nucleusnucleus collisions can be employed to shed some more light on the origin of the photon v2 “puzzle”. While the dilepton spectra at low invariant mass show in-medium effects like an enhancement from multiple baryonic resonance formation or a collisional broadening of the vector meson spectral functions, the dilepton yield at high invariant masses (above 1.1 GeV) is dominated by QGP contributions for central heavy-ion collisions at ultra-relativistic energies. This allows to have an independent view on the parton dynamics via their electromagnetic massive radiation.
Y1  - 2015
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/44200
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-442007
SN  - 2100-014X
N1  - © Owned by the authors, published by EDP Sciences, 2015 Licence Creative Commons This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
N1  - 3rd International Conference on New Frontiers in Physics
VL  - 95
IS  - 01002
PB  - EDP Sciences
CY  - Les Ulis
ER  -